Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

14 files changed, 2359 insertions, 0 deletions

diff --git a/extensions/source/logging/consolehandler.cxx b/extensions/source/logging/consolehandler.cxx
new file mode 100644
index 000000000..d1455baa3
--- /dev/null
+++ b/extensions/source/logging/consolehandler.cxx
@@ -0,0 +1,264 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include "methodguard.hxx"
+#include "loghandler.hxx"
+
+#include <com/sun/star/logging/XConsoleHandler.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/logging/LogLevel.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/beans/NamedValue.hpp>
+
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+#include <stdio.h>
+
+namespace logging
+{
+    using ::com::sun::star::logging::XConsoleHandler;
+    using ::com::sun::star::lang::XServiceInfo;
+    using ::com::sun::star::uno::Reference;
+    using ::com::sun::star::uno::XComponentContext;
+    using ::com::sun::star::logging::XLogFormatter;
+    using ::com::sun::star::uno::Sequence;
+    using ::com::sun::star::logging::LogRecord;
+    using ::com::sun::star::uno::XInterface;
+    using ::com::sun::star::lang::IllegalArgumentException;
+    using ::com::sun::star::beans::NamedValue;
+
+    typedef ::cppu::WeakComponentImplHelper    <   XConsoleHandler
+                                                ,   XServiceInfo
+                                                >   ConsoleHandler_Base;
+
+    namespace {
+
+    class ConsoleHandler    :public ::cppu::BaseMutex
+                            ,public ConsoleHandler_Base
+    {
+    private:
+        LogHandlerHelper                m_aHandlerHelper;
+        sal_Int32                       m_nThreshold;
+
+    public:
+        ConsoleHandler(const Reference<XComponentContext> &context,
+            const css::uno::Sequence<css::uno::Any> &arguments);
+        virtual ~ConsoleHandler() override;
+
+    private:
+        // XConsoleHandler
+        virtual ::sal_Int32 SAL_CALL getThreshold() override;
+        virtual void SAL_CALL setThreshold( ::sal_Int32 _threshold ) override;
+
+        // XLogHandler
+        virtual OUString SAL_CALL getEncoding() override;
+        virtual void SAL_CALL setEncoding( const OUString& _encoding ) override;
+        virtual Reference< XLogFormatter > SAL_CALL getFormatter() override;
+        virtual void SAL_CALL setFormatter( const Reference< XLogFormatter >& _formatter ) override;
+        virtual ::sal_Int32 SAL_CALL getLevel() override;
+        virtual void SAL_CALL setLevel( ::sal_Int32 _level ) override;
+        virtual void SAL_CALL flush(  ) override;
+        virtual sal_Bool SAL_CALL publish( const LogRecord& Record ) override;
+
+        // XServiceInfo
+        virtual OUString SAL_CALL getImplementationName() override;
+        virtual sal_Bool SAL_CALL supportsService( const OUString& _rServiceName ) override;
+        virtual Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+        // OComponentHelper
+        virtual void SAL_CALL disposing() override;
+
+    public:
+        typedef ComponentMethodGuard< ConsoleHandler > MethodGuard;
+        void    enterMethod( MethodGuard::Access );
+        void    leaveMethod( MethodGuard::Access );
+    };
+
+    }
+
+    ConsoleHandler::ConsoleHandler(const Reference<XComponentContext> &context,
+            const css::uno::Sequence<css::uno::Any> &arguments)
+        :ConsoleHandler_Base( m_aMutex )
+        ,m_aHandlerHelper( context, m_aMutex, rBHelper )
+        ,m_nThreshold( css::logging::LogLevel::SEVERE )
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+
+        if ( !arguments.hasElements() )
+        {   // create() - nothing to init
+            m_aHandlerHelper.setIsInitialized();
+            return;
+        }
+
+        if ( arguments.getLength() != 1 )
+            throw IllegalArgumentException( OUString(), *this, 1 );
+
+        Sequence< NamedValue > aSettings;
+        if ( !( arguments[0] >>= aSettings ) )
+            throw IllegalArgumentException( OUString(), *this, 1 );
+
+        // createWithSettings( [in] sequence< css::beans::NamedValue > Settings )
+        ::comphelper::NamedValueCollection aTypedSettings( aSettings );
+        m_aHandlerHelper.initFromSettings( aTypedSettings );
+
+        aTypedSettings.get_ensureType( "Threshold", m_nThreshold );
+
+        m_aHandlerHelper.setIsInitialized();
+    }
+
+    ConsoleHandler::~ConsoleHandler()
+    {
+        if ( !rBHelper.bDisposed )
+        {
+            acquire();
+            dispose();
+        }
+    }
+
+
+    void SAL_CALL ConsoleHandler::disposing()
+    {
+        m_aHandlerHelper.setFormatter( nullptr );
+    }
+
+
+    void ConsoleHandler::enterMethod( MethodGuard::Access )
+    {
+        m_aHandlerHelper.enterMethod();
+    }
+
+
+    void ConsoleHandler::leaveMethod( MethodGuard::Access )
+    {
+        m_aMutex.release();
+    }
+
+
+    ::sal_Int32 SAL_CALL ConsoleHandler::getThreshold()
+    {
+        MethodGuard aGuard( *this );
+        return m_nThreshold;
+    }
+
+
+    void SAL_CALL ConsoleHandler::setThreshold( ::sal_Int32 _threshold )
+    {
+        MethodGuard aGuard( *this );
+        m_nThreshold = _threshold;
+    }
+
+
+    OUString SAL_CALL ConsoleHandler::getEncoding()
+    {
+        MethodGuard aGuard( *this );
+        OUString sEncoding;
+        OSL_VERIFY( m_aHandlerHelper.getEncoding( sEncoding ) );
+        return sEncoding;
+    }
+
+
+    void SAL_CALL ConsoleHandler::setEncoding( const OUString& _rEncoding )
+    {
+        MethodGuard aGuard( *this );
+        OSL_VERIFY( m_aHandlerHelper.setEncoding( _rEncoding ) );
+    }
+
+
+    Reference< XLogFormatter > SAL_CALL ConsoleHandler::getFormatter()
+    {
+        MethodGuard aGuard( *this );
+        return m_aHandlerHelper.getFormatter();
+    }
+
+
+    void SAL_CALL ConsoleHandler::setFormatter( const Reference< XLogFormatter >& _rxFormatter )
+    {
+        MethodGuard aGuard( *this );
+        m_aHandlerHelper.setFormatter( _rxFormatter );
+    }
+
+
+    ::sal_Int32 SAL_CALL ConsoleHandler::getLevel()
+    {
+        MethodGuard aGuard( *this );
+        return m_aHandlerHelper.getLevel();
+    }
+
+
+    void SAL_CALL ConsoleHandler::setLevel( ::sal_Int32 _nLevel )
+    {
+        MethodGuard aGuard( *this );
+        m_aHandlerHelper.setLevel( _nLevel );
+    }
+
+
+    void SAL_CALL ConsoleHandler::flush(  )
+    {
+        MethodGuard aGuard( *this );
+        fflush( stdout );
+        fflush( stderr );
+    }
+
+
+    sal_Bool SAL_CALL ConsoleHandler::publish( const LogRecord& _rRecord )
+    {
+        MethodGuard aGuard( *this );
+
+        OString sEntry;
+        if ( !m_aHandlerHelper.formatForPublishing( _rRecord, sEntry ) )
+            return false;
+
+        if ( _rRecord.Level >= m_nThreshold )
+            fprintf( stderr, "%s\n", sEntry.getStr() );
+        else
+            fprintf( stdout, "%s\n", sEntry.getStr() );
+
+        return true;
+    }
+
+    OUString SAL_CALL ConsoleHandler::getImplementationName()
+    {
+        return "com.sun.star.comp.extensions.ConsoleHandler";
+    }
+
+    sal_Bool SAL_CALL ConsoleHandler::supportsService( const OUString& _rServiceName )
+    {
+        return cppu::supportsService(this, _rServiceName);
+    }
+
+    Sequence< OUString > SAL_CALL ConsoleHandler::getSupportedServiceNames()
+    {
+        return { "com.sun.star.logging.ConsoleHandler" };
+    }
+
+} // namespace logging
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *
+com_sun_star_comp_extensions_ConsoleHandler(
+    css::uno::XComponentContext *context,
+    css::uno::Sequence<css::uno::Any> const &arguments)
+{
+    return cppu::acquire(new logging::ConsoleHandler(context, arguments));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/logging/csvformatter.cxx b/extensions/source/logging/csvformatter.cxx
new file mode 100644
index 000000000..8e749db42
--- /dev/null
+++ b/extensions/source/logging/csvformatter.cxx
@@ -0,0 +1,320 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <com/sun/star/logging/XCsvLogFormatter.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+#include <rtl/ustrbuf.hxx>
+#include <sal/macros.h>
+#include <sal/types.h>
+
+#include <stdio.h>
+#include <string_view>
+
+namespace logging
+{
+    using ::com::sun::star::uno::Sequence;
+    using ::com::sun::star::logging::LogRecord;
+
+    namespace {
+
+    // formats for csv files as defined by RFC4180
+    class CsvFormatter : public cppu::WeakImplHelper<css::logging::XCsvLogFormatter, css::lang::XServiceInfo>
+    {
+    public:
+        virtual OUString SAL_CALL formatMultiColumn(const Sequence< OUString>& column_data) override;
+
+        CsvFormatter();
+
+    private:
+        // XCsvLogFormatter
+        virtual sal_Bool SAL_CALL getLogEventNo() override;
+        virtual sal_Bool SAL_CALL getLogThread() override;
+        virtual sal_Bool SAL_CALL getLogTimestamp() override;
+        virtual sal_Bool SAL_CALL getLogSource() override;
+        virtual Sequence< OUString > SAL_CALL getColumnnames() override;
+
+        virtual void SAL_CALL setLogEventNo( sal_Bool log_event_no ) override;
+        virtual void SAL_CALL setLogThread( sal_Bool log_thread ) override;
+        virtual void SAL_CALL setLogTimestamp( sal_Bool log_timestamp ) override;
+        virtual void SAL_CALL setLogSource( sal_Bool log_source ) override;
+        virtual void SAL_CALL setColumnnames( const Sequence< OUString>& column_names) override;
+
+        // XLogFormatter
+        virtual OUString SAL_CALL getHead(  ) override;
+        virtual OUString SAL_CALL format( const LogRecord& Record ) override;
+        virtual OUString SAL_CALL getTail(  ) override;
+
+        // XServiceInfo
+        virtual OUString SAL_CALL getImplementationName() override;
+        virtual sal_Bool SAL_CALL supportsService( const OUString& service_name ) override;
+        virtual Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    private:
+        bool m_LogEventNo;
+        bool m_LogThread;
+        bool m_LogTimestamp;
+        bool m_LogSource;
+        bool m_MultiColumn;
+        css::uno::Sequence< OUString > m_Columnnames;
+    };
+
+    }
+} // namespace logging
+
+// private helpers
+namespace
+{
+    const sal_Unicode quote_char = '"';
+    const sal_Unicode comma_char = ',';
+    constexpr OUStringLiteral dos_newline = u"\r\n";
+
+    bool needsQuoting(std::u16string_view str)
+    {
+        return str.find_first_of(u"\",\n\r") != std::u16string_view::npos;
+    };
+
+    void appendEncodedString(OUStringBuffer& buf, const OUString& str)
+    {
+        if(needsQuoting(str))
+        {
+            // each double-quote will get replaced by two double-quotes
+            buf.append(quote_char);
+            const sal_Int32 buf_offset = buf.getLength();
+            const sal_Int32 str_length = str.getLength();
+            buf.append(str);
+            // special treatment for the last character
+            if(quote_char==str[str_length-1])
+                buf.append(quote_char);
+            // iterating backwards because the index at which we insert won't be shifted
+            // when moving that way.
+            for(sal_Int32 i = str_length; i>=0; )
+            {
+                i=str.lastIndexOf(quote_char, --i);
+                if(i!=-1)
+                    buf.insert(buf_offset + i, quote_char);
+            }
+            buf.append(quote_char);
+        }
+        else
+            buf.append(str);
+    };
+}
+
+namespace logging
+{
+    CsvFormatter::CsvFormatter()
+        :m_LogEventNo(true),
+        m_LogThread(true),
+        m_LogTimestamp(true),
+        m_LogSource(false),
+        m_MultiColumn(false),
+        m_Columnnames({ "message" })
+    { }
+
+    sal_Bool CsvFormatter::getLogEventNo()
+    {
+        return m_LogEventNo;
+    }
+
+    sal_Bool CsvFormatter::getLogThread()
+    {
+        return m_LogThread;
+    }
+
+    sal_Bool CsvFormatter::getLogTimestamp()
+    {
+        return m_LogTimestamp;
+    }
+
+    sal_Bool CsvFormatter::getLogSource()
+    {
+        return m_LogSource;
+    }
+
+    Sequence< OUString > CsvFormatter::getColumnnames()
+    {
+        return m_Columnnames;
+    }
+
+    void CsvFormatter::setLogEventNo(sal_Bool log_event_no)
+    {
+        m_LogEventNo = log_event_no;
+    }
+
+    void CsvFormatter::setLogThread(sal_Bool log_thread)
+    {
+        m_LogThread = log_thread;
+    }
+
+    void CsvFormatter::setLogTimestamp(sal_Bool log_timestamp)
+    {
+        m_LogTimestamp = log_timestamp;
+    }
+
+    void CsvFormatter::setLogSource(sal_Bool log_source)
+    {
+        m_LogSource = log_source;
+    }
+
+    void CsvFormatter::setColumnnames(const Sequence< OUString >& columnnames)
+    {
+        m_Columnnames = columnnames;
+        m_MultiColumn = (m_Columnnames.getLength()>1);
+    }
+
+    OUString SAL_CALL CsvFormatter::getHead(  )
+    {
+        OUStringBuffer buf;
+        if(m_LogEventNo)
+            buf.append("event no,");
+        if(m_LogThread)
+            buf.append("thread,");
+        if(m_LogTimestamp)
+            buf.append("timestamp,");
+        if(m_LogSource)
+            buf.append("class,method,");
+        sal_Int32 columns = m_Columnnames.getLength();
+        for(sal_Int32 i=0; i<columns; i++)
+        {
+            buf.append(m_Columnnames[i]);
+            buf.append(comma_char);
+        }
+        buf.setLength(buf.getLength()-1);
+        buf.append(dos_newline);
+        return buf.makeStringAndClear();
+    }
+
+    OUString SAL_CALL CsvFormatter::format( const LogRecord& record )
+    {
+        OUStringBuffer aLogEntry;
+
+        if(m_LogEventNo)
+        {
+            aLogEntry.append( record.SequenceNumber );
+            aLogEntry.append(comma_char);
+        }
+
+        if(m_LogThread)
+        {
+            aLogEntry.append( record.ThreadID );
+            aLogEntry.append(comma_char);
+        }
+
+        if(m_LogTimestamp)
+        {
+            if (   record.LogTime.Year < -9999 || 9999 < record.LogTime.Year
+                || record.LogTime.Month < 1 || 12 < record.LogTime.Month
+                || record.LogTime.Day < 1 || 31 < record.LogTime.Day
+                || 24 < record.LogTime.Hours
+                || 60 < record.LogTime.Minutes
+                || 60 < record.LogTime.Seconds
+                || 999999999 < record.LogTime.NanoSeconds)
+            {
+                throw css::lang::IllegalArgumentException("invalid date", static_cast<cppu::OWeakObject*>(this), 1);
+            }
+
+            // ISO 8601
+            char buffer[ SAL_N_ELEMENTS("-32768-65535-65535T65535:65535:65535.4294967295") ];
+            const size_t buffer_size = sizeof( buffer );
+            snprintf( buffer, buffer_size, "%04i-%02u-%02uT%02u:%02u:%02u.%09" SAL_PRIuUINT32,
+                static_cast<int>(record.LogTime.Year),
+                static_cast<unsigned int>(record.LogTime.Month),
+                static_cast<unsigned int>(record.LogTime.Day),
+                static_cast<unsigned int>(record.LogTime.Hours),
+                static_cast<unsigned int>(record.LogTime.Minutes),
+                static_cast<unsigned int>(record.LogTime.Seconds),
+                record.LogTime.NanoSeconds );
+            aLogEntry.appendAscii( buffer );
+            aLogEntry.append(comma_char);
+        }
+
+        if(m_LogSource)
+        {
+            appendEncodedString(aLogEntry, record.SourceClassName);
+            aLogEntry.append(comma_char);
+
+            appendEncodedString(aLogEntry, record.SourceMethodName);
+            aLogEntry.append(comma_char);
+        }
+
+        // if the CsvFormatter has multiple columns set via setColumnnames(), the
+        // message of the record is expected to be encoded with formatMultiColumn
+        // if the CsvFormatter has only one column set, the message is expected not
+        // to be encoded
+        if(m_MultiColumn)
+            aLogEntry.append(record.Message);
+        else
+            appendEncodedString(aLogEntry, record.Message);
+
+        aLogEntry.append( dos_newline );
+        return aLogEntry.makeStringAndClear();
+    }
+
+    OUString SAL_CALL CsvFormatter::getTail(  )
+    {
+        return OUString();
+    }
+
+    OUString SAL_CALL CsvFormatter::formatMultiColumn(const Sequence< OUString>& column_data)
+    {
+        sal_Int32 columns = column_data.getLength();
+        OUStringBuffer buf;
+        for(int i=0; i<columns; i++)
+        {
+            appendEncodedString(buf, column_data[i]);
+            buf.append(comma_char);
+        }
+        buf.setLength(buf.getLength()-1);
+        return buf.makeStringAndClear();
+    }
+
+    sal_Bool SAL_CALL CsvFormatter::supportsService( const OUString& service_name )
+    {
+        return cppu::supportsService(this, service_name);
+    }
+
+    OUString SAL_CALL CsvFormatter::getImplementationName()
+    {
+        return "com.sun.star.comp.extensions.CsvFormatter";
+    }
+
+    Sequence< OUString > SAL_CALL CsvFormatter::getSupportedServiceNames()
+    {
+        return { "com.sun.star.logging.CsvFormatter" };
+    }
+
+} // namespace logging
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *
+com_sun_star_comp_extensions_CsvFormatter(
+    css::uno::XComponentContext *,
+    css::uno::Sequence<css::uno::Any> const &)
+{
+    return cppu::acquire(new logging::CsvFormatter());
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/logging/filehandler.cxx b/extensions/source/logging/filehandler.cxx
new file mode 100644
index 000000000..200a3a64b
--- /dev/null
+++ b/extensions/source/logging/filehandler.cxx
@@ -0,0 +1,359 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+#include <sal/log.hxx>
+
+#include "methodguard.hxx"
+#include "loghandler.hxx"
+
+#include <com/sun/star/logging/XLogHandler.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/util/PathSubstitution.hpp>
+#include <com/sun/star/util/XStringSubstitution.hpp>
+
+#include <tools/diagnose_ex.h>
+
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+#include <osl/file.hxx>
+
+#include <memory>
+
+namespace logging
+{
+    using ::com::sun::star::uno::Reference;
+    using ::com::sun::star::logging::LogRecord;
+    using ::com::sun::star::logging::XLogFormatter;
+    using ::com::sun::star::uno::Sequence;
+    using ::com::sun::star::uno::XInterface;
+    using ::com::sun::star::uno::XComponentContext;
+    using ::com::sun::star::logging::XLogHandler;
+    using ::com::sun::star::lang::XServiceInfo;
+    using ::com::sun::star::uno::Exception;
+    using ::com::sun::star::lang::IllegalArgumentException;
+    using ::com::sun::star::util::PathSubstitution;
+    using ::com::sun::star::util::XStringSubstitution;
+    using ::com::sun::star::beans::NamedValue;
+
+    typedef ::cppu::WeakComponentImplHelper    <   XLogHandler
+                                                ,   XServiceInfo
+                                                >   FileHandler_Base;
+
+    namespace {
+
+    class FileHandler   :public ::cppu::BaseMutex
+                        ,public FileHandler_Base
+    {
+    private:
+        enum FileValidity
+        {
+            /// never attempted to open the file
+            eUnknown,
+            /// file is valid
+            eValid,
+            /// file is invalid
+            eInvalid
+        };
+
+        Reference<XComponentContext>    m_xContext;
+        LogHandlerHelper                m_aHandlerHelper;
+        OUString                 m_sFileURL;
+        std::unique_ptr< ::osl::File >  m_pFile;
+        FileValidity                    m_eFileValidity;
+
+    public:
+        FileHandler(const css::uno::Reference<XComponentContext> &context,
+                const css::uno::Sequence<css::uno::Any> &arguments);
+        virtual ~FileHandler() override;
+
+    private:
+        // XLogHandler
+        virtual OUString SAL_CALL getEncoding() override;
+        virtual void SAL_CALL setEncoding( const OUString& _encoding ) override;
+        virtual Reference< XLogFormatter > SAL_CALL getFormatter() override;
+        virtual void SAL_CALL setFormatter( const Reference< XLogFormatter >& _formatter ) override;
+        virtual ::sal_Int32 SAL_CALL getLevel() override;
+        virtual void SAL_CALL setLevel( ::sal_Int32 _level ) override;
+        virtual void SAL_CALL flush(  ) override;
+        virtual sal_Bool SAL_CALL publish( const LogRecord& Record ) override;
+
+        // XServiceInfo
+        virtual OUString SAL_CALL getImplementationName() override;
+        virtual sal_Bool SAL_CALL supportsService( const OUString& _rServiceName ) override;
+        virtual Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+        // OComponentHelper
+        virtual void SAL_CALL disposing() override;
+
+    public:
+        typedef ComponentMethodGuard< FileHandler > MethodGuard;
+        void    enterMethod( MethodGuard::Access );
+        void    leaveMethod( MethodGuard::Access );
+
+    private:
+        /** prepares our output file for writing
+        */
+        bool    impl_prepareFile_nothrow();
+
+        /// writes the given string to our file
+        void    impl_writeString_nothrow( const OString& _rEntry );
+
+        /** does string substitution on a (usually externally provided) file url
+        */
+        void    impl_doStringsubstitution_nothrow( OUString& _inout_rURL );
+    };
+
+    }
+
+    FileHandler::FileHandler(const css::uno::Reference<XComponentContext> &context,
+            const css::uno::Sequence<css::uno::Any> &arguments)
+        :FileHandler_Base( m_aMutex )
+        ,m_xContext( context )
+        ,m_aHandlerHelper( context, m_aMutex, rBHelper )
+        ,m_eFileValidity( eUnknown )
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+
+        if ( arguments.getLength() != 1 )
+            throw IllegalArgumentException( OUString(), *this, 1 );
+
+        Sequence< NamedValue > aSettings;
+        if ( arguments[0] >>= m_sFileURL )
+        {
+            // create( [in] string URL );
+            impl_doStringsubstitution_nothrow( m_sFileURL );
+        }
+        else if ( arguments[0] >>= aSettings )
+        {
+            // createWithSettings( [in] sequence< css::beans::NamedValue > Settings )
+            ::comphelper::NamedValueCollection aTypedSettings( aSettings );
+            m_aHandlerHelper.initFromSettings( aTypedSettings );
+
+            if ( aTypedSettings.get_ensureType( "FileURL", m_sFileURL ) )
+                impl_doStringsubstitution_nothrow( m_sFileURL );
+        }
+        else
+            throw IllegalArgumentException( OUString(), *this, 1 );
+
+        m_aHandlerHelper.setIsInitialized();
+    }
+
+    FileHandler::~FileHandler()
+    {
+        if ( !rBHelper.bDisposed )
+        {
+            acquire();
+            dispose();
+        }
+    }
+
+
+    bool FileHandler::impl_prepareFile_nothrow()
+    {
+        if ( m_eFileValidity == eUnknown )
+        {
+            m_pFile.reset( new ::osl::File( m_sFileURL ) );
+            // check whether the log file already exists
+            ::osl::DirectoryItem aFileItem;
+            if (osl::FileBase::E_None == ::osl::DirectoryItem::get(m_sFileURL, aFileItem))
+            {
+                ::osl::FileStatus aStatus(osl_FileStatus_Mask_Validate);
+                if (::osl::FileBase::E_None == aFileItem.getFileStatus(aStatus))
+                    ::osl::File::remove(m_sFileURL);
+            }
+
+            ::osl::FileBase::RC res = m_pFile->open( osl_File_OpenFlag_Write | osl_File_OpenFlag_Create );
+            m_eFileValidity =   res == ::osl::FileBase::E_None
+                            ?   eValid
+                            :   eInvalid;
+        #if OSL_DEBUG_LEVEL > 0
+            if ( m_eFileValidity == eInvalid )
+            {
+                SAL_WARN( "extensions.logging", "FileHandler::impl_prepareFile_nothrow: could not open the designated log file:"
+                            "\nURL: " << m_sFileURL
+                            << "\nerror code: " << static_cast<sal_Int32>(res) );
+            }
+        #endif
+            if ( m_eFileValidity == eValid )
+            {
+                OString sHead;
+                if ( m_aHandlerHelper.getEncodedHead( sHead ) )
+                    impl_writeString_nothrow( sHead );
+            }
+        }
+
+        return m_eFileValidity == eValid;
+    }
+
+
+    void FileHandler::impl_writeString_nothrow( const OString& _rEntry )
+    {
+        OSL_PRECOND(m_pFile, "FileHandler::impl_writeString_nothrow: no file!");
+
+        sal_uInt64 nBytesToWrite( _rEntry.getLength() );
+        sal_uInt64 nBytesWritten( 0 );
+        ::osl::FileBase::RC res =
+              m_pFile->write( _rEntry.getStr(), nBytesToWrite, nBytesWritten );
+        OSL_ENSURE( ( res == ::osl::FileBase::E_None ) && ( nBytesWritten == nBytesToWrite ),
+            "FileHandler::impl_writeString_nothrow: could not write the log entry!" );
+    }
+
+
+    void FileHandler::impl_doStringsubstitution_nothrow( OUString& _inout_rURL )
+    {
+        try
+        {
+            Reference< XStringSubstitution > xStringSubst(PathSubstitution::create(m_xContext));
+            _inout_rURL = xStringSubst->substituteVariables( _inout_rURL, true );
+        }
+        catch( const Exception& )
+        {
+            DBG_UNHANDLED_EXCEPTION("extensions.logging");
+        }
+    }
+
+
+    void SAL_CALL FileHandler::disposing()
+    {
+        if ( m_eFileValidity == eValid )
+        {
+            OString sTail;
+            if ( m_aHandlerHelper.getEncodedTail( sTail ) )
+                impl_writeString_nothrow( sTail );
+        }
+
+        m_pFile.reset();
+        m_aHandlerHelper.setFormatter( nullptr );
+    }
+
+
+    void FileHandler::enterMethod( MethodGuard::Access )
+    {
+        m_aHandlerHelper.enterMethod();
+    }
+
+
+    void FileHandler::leaveMethod( MethodGuard::Access )
+    {
+        m_aMutex.release();
+    }
+
+
+    OUString SAL_CALL FileHandler::getEncoding()
+    {
+        MethodGuard aGuard( *this );
+        OUString sEncoding;
+        OSL_VERIFY( m_aHandlerHelper.getEncoding( sEncoding ) );
+        return sEncoding;
+    }
+
+
+    void SAL_CALL FileHandler::setEncoding( const OUString& _rEncoding )
+    {
+        MethodGuard aGuard( *this );
+        OSL_VERIFY( m_aHandlerHelper.setEncoding( _rEncoding ) );
+    }
+
+
+    Reference< XLogFormatter > SAL_CALL FileHandler::getFormatter()
+    {
+        MethodGuard aGuard( *this );
+        return m_aHandlerHelper.getFormatter();
+    }
+
+
+    void SAL_CALL FileHandler::setFormatter( const Reference< XLogFormatter >& _rxFormatter )
+    {
+        MethodGuard aGuard( *this );
+        m_aHandlerHelper.setFormatter( _rxFormatter );
+    }
+
+
+    ::sal_Int32 SAL_CALL FileHandler::getLevel()
+    {
+        MethodGuard aGuard( *this );
+        return m_aHandlerHelper.getLevel();
+    }
+
+
+    void SAL_CALL FileHandler::setLevel( ::sal_Int32 _nLevel )
+    {
+        MethodGuard aGuard( *this );
+        m_aHandlerHelper.setLevel( _nLevel );
+    }
+
+
+    void SAL_CALL FileHandler::flush(  )
+    {
+        MethodGuard aGuard( *this );
+        if (!m_pFile)
+        {
+            OSL_PRECOND(false, "FileHandler::flush: no file!");
+            return;
+        }
+        ::osl::FileBase::RC res = m_pFile->sync();
+        OSL_ENSURE(res == ::osl::FileBase::E_None, "FileHandler::flush: Could not sync logfile to filesystem.");
+    }
+
+
+    sal_Bool SAL_CALL FileHandler::publish( const LogRecord& _rRecord )
+    {
+        MethodGuard aGuard( *this );
+
+        if ( !impl_prepareFile_nothrow() )
+            return false;
+
+        OString sEntry;
+        if ( !m_aHandlerHelper.formatForPublishing( _rRecord, sEntry ) )
+            return false;
+
+        impl_writeString_nothrow( sEntry );
+        return true;
+    }
+
+    OUString SAL_CALL FileHandler::getImplementationName()
+    {
+        return "com.sun.star.comp.extensions.FileHandler";
+    }
+
+    sal_Bool SAL_CALL FileHandler::supportsService( const OUString& _rServiceName )
+    {
+        return cppu::supportsService(this, _rServiceName);
+    }
+
+    Sequence< OUString > SAL_CALL FileHandler::getSupportedServiceNames()
+    {
+        return { "com.sun.star.logging.FileHandler" };
+    }
+
+} // namespace logging
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *
+com_sun_star_comp_extensions_FileHandler(
+    css::uno::XComponentContext *context,
+    css::uno::Sequence<css::uno::Any> const &arguments)
+{
+    return cppu::acquire(new logging::FileHandler(context, arguments));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/logging/log.component b/extensions/source/logging/log.component
new file mode 100644
index 000000000..ae221bb57
--- /dev/null
+++ b/extensions/source/logging/log.component
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.comp.extensions.ConsoleHandler"
+      constructor="com_sun_star_comp_extensions_ConsoleHandler">
+    <service name="com.sun.star.logging.ConsoleHandler"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.extensions.CsvFormatter"
+      constructor="com_sun_star_comp_extensions_CsvFormatter">
+    <service name="com.sun.star.logging.CsvFormatter"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.extensions.FileHandler"
+      constructor="com_sun_star_comp_extensions_FileHandler">
+    <service name="com.sun.star.logging.FileHandler"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.extensions.LoggerPool"
+      constructor="com_sun_star_comp_extensions_LoggerPool"
+      single-instance="true">
+    <singleton name="com.sun.star.logging.LoggerPool"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.extensions.PlainTextFormatter"
+      constructor="com_sun_star_comp_extensions_PlainTextFormatter">
+    <service name="com.sun.star.logging.PlainTextFormatter"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.extensions.SimpleTextFormatter"
+      constructor="com_sun_star_comp_extensions_SimpleTextFormatter">
+    <service name="com.sun.star.logging.SimpleTextFormatter"/>
+  </implementation>
+</component>
diff --git a/extensions/source/logging/logger.cxx b/extensions/source/logging/logger.cxx
new file mode 100644
index 000000000..322ad7ab9
--- /dev/null
+++ b/extensions/source/logging/logger.cxx
@@ -0,0 +1,265 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include "logrecord.hxx"
+#include "loggerconfig.hxx"
+
+#include <com/sun/star/logging/XLogger.hpp>
+#include <com/sun/star/logging/LogLevel.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/logging/XLoggerPool.hpp>
+
+#include <cppuhelper/basemutex.hxx>
+#include <comphelper/interfacecontainer2.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <cppuhelper/weakref.hxx>
+#include <map>
+
+
+namespace logging
+{
+
+    using ::com::sun::star::logging::XLogger;
+    using ::com::sun::star::uno::Reference;
+    using ::com::sun::star::uno::XComponentContext;
+    using ::com::sun::star::lang::XServiceInfo;
+    using ::com::sun::star::uno::Sequence;
+    using ::com::sun::star::uno::XInterface;
+    using ::com::sun::star::uno::WeakReference;
+    using ::com::sun::star::logging::XLogHandler;
+    using ::com::sun::star::logging::LogRecord;
+
+    namespace {
+
+    class EventLogger : public cppu::BaseMutex,
+                        public cppu::WeakImplHelper<css::logging::XLogger>
+    {
+    private:
+        comphelper::OInterfaceContainerHelper2     m_aHandlers;
+        oslInterlockedCount                 m_nEventNumber;
+
+        // <attributes>
+        sal_Int32       m_nLogLevel;
+        OUString m_sName;
+        // </attributes>
+
+    public:
+        EventLogger( const Reference< XComponentContext >& _rxContext, const OUString& _rName );
+
+        // XLogger
+        virtual OUString SAL_CALL getName() override;
+        virtual ::sal_Int32 SAL_CALL getLevel() override;
+        virtual void SAL_CALL setLevel( ::sal_Int32 _level ) override;
+        virtual void SAL_CALL addLogHandler( const Reference< XLogHandler >& LogHandler ) override;
+        virtual void SAL_CALL removeLogHandler( const Reference< XLogHandler >& LogHandler ) override;
+        virtual sal_Bool SAL_CALL isLoggable( ::sal_Int32 _nLevel ) override;
+        virtual void SAL_CALL log( ::sal_Int32 Level, const OUString& Message ) override;
+        virtual void SAL_CALL logp( ::sal_Int32 Level, const OUString& SourceClass, const OUString& SourceMethod, const OUString& Message ) override;
+
+    protected:
+        virtual ~EventLogger() override;
+
+    private:
+        /** logs the given log record
+        */
+        void    impl_ts_logEvent_nothrow( const LogRecord& _rRecord );
+
+        /** non-threadsafe impl-version of isLoggable
+        */
+        bool    impl_nts_isLoggable_nothrow( ::sal_Int32 _nLevel );
+    };
+
+    /** administrates a pool of XLogger instances, where a logger is keyed by its name,
+        and subsequent requests for a logger with the same name return the same instance.
+    */
+    class LoggerPool : public cppu::WeakImplHelper<css::logging::XLoggerPool, XServiceInfo>
+    {
+    private:
+        ::osl::Mutex                    m_aMutex;
+        Reference<XComponentContext>    m_xContext;
+        std::map< OUString, WeakReference<XLogger> > m_aLoggerMap;
+
+    public:
+        explicit LoggerPool( const Reference< XComponentContext >& _rxContext );
+
+        // XServiceInfo
+        virtual OUString SAL_CALL getImplementationName() override;
+        virtual sal_Bool SAL_CALL supportsService( const OUString& _rServiceName ) override;
+        virtual Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+        // XLoggerPool
+        virtual Reference< XLogger > SAL_CALL getNamedLogger( const OUString& Name ) override;
+        virtual Reference< XLogger > SAL_CALL getDefaultLogger(  ) override;
+    };
+
+    }
+
+    EventLogger::EventLogger( const Reference< XComponentContext >& _rxContext, const OUString& _rName )
+        :m_aHandlers( m_aMutex )
+        ,m_nEventNumber( 0 )
+        ,m_nLogLevel( css::logging::LogLevel::OFF )
+        ,m_sName( _rName )
+    {
+        osl_atomic_increment( &m_refCount );
+        {
+            initializeLoggerFromConfiguration( _rxContext, this );
+        }
+        osl_atomic_decrement( &m_refCount );
+    }
+
+    EventLogger::~EventLogger()
+    {
+    }
+
+    bool EventLogger::impl_nts_isLoggable_nothrow( ::sal_Int32 _nLevel )
+    {
+        if ( _nLevel < m_nLogLevel )
+            return false;
+
+        if ( !m_aHandlers.getLength() )
+            return false;
+
+        return true;
+    }
+
+    void EventLogger::impl_ts_logEvent_nothrow( const LogRecord& _rRecord )
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+
+        if ( !impl_nts_isLoggable_nothrow( _rRecord.Level ) )
+            return;
+
+        m_aHandlers.forEach< XLogHandler >(
+            [&_rRecord] (Reference<XLogHandler> const& rxListener) { rxListener->publish(_rRecord); } );
+        m_aHandlers.forEach< XLogHandler >(
+            [] (Reference<XLogHandler> const& rxListener) { rxListener->flush(); } );
+    }
+
+    OUString SAL_CALL EventLogger::getName()
+    {
+        return m_sName;
+    }
+
+    ::sal_Int32 SAL_CALL EventLogger::getLevel()
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+        return m_nLogLevel;
+    }
+
+    void SAL_CALL EventLogger::setLevel( ::sal_Int32 _level )
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+        m_nLogLevel = _level;
+    }
+
+    void SAL_CALL EventLogger::addLogHandler( const Reference< XLogHandler >& _rxLogHandler )
+    {
+        if ( _rxLogHandler.is() )
+            m_aHandlers.addInterface( _rxLogHandler );
+    }
+
+    void SAL_CALL EventLogger::removeLogHandler( const Reference< XLogHandler >& _rxLogHandler )
+    {
+        if ( _rxLogHandler.is() )
+            m_aHandlers.removeInterface( _rxLogHandler );
+    }
+
+    sal_Bool SAL_CALL EventLogger::isLoggable( ::sal_Int32 _nLevel )
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+        return impl_nts_isLoggable_nothrow( _nLevel );
+    }
+
+    void SAL_CALL EventLogger::log( ::sal_Int32 _nLevel, const OUString& _rMessage )
+    {
+        impl_ts_logEvent_nothrow( createLogRecord(
+            m_sName,
+            _rMessage,
+            _nLevel,
+            osl_atomic_increment( &m_nEventNumber )
+        ) );
+    }
+
+    void SAL_CALL EventLogger::logp( ::sal_Int32 _nLevel, const OUString& _rSourceClass, const OUString& _rSourceMethod, const OUString& _rMessage )
+    {
+        impl_ts_logEvent_nothrow( createLogRecord(
+            m_sName,
+            _rSourceClass,
+            _rSourceMethod,
+            _rMessage,
+            _nLevel,
+            osl_atomic_increment( &m_nEventNumber )
+        ) );
+    }
+
+    LoggerPool::LoggerPool( const Reference< XComponentContext >& _rxContext )
+        :m_xContext( _rxContext )
+    {
+    }
+
+    OUString SAL_CALL LoggerPool::getImplementationName()
+    {
+        return "com.sun.star.comp.extensions.LoggerPool";
+    }
+
+    sal_Bool SAL_CALL LoggerPool::supportsService( const OUString& _rServiceName )
+    {
+        return cppu::supportsService(this, _rServiceName);
+    }
+
+    Sequence< OUString > SAL_CALL LoggerPool::getSupportedServiceNames()
+    {
+        return { "com.sun.star.logging.LoggerPool" };
+    }
+
+    Reference< XLogger > SAL_CALL LoggerPool::getNamedLogger( const OUString& _rName )
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+
+        WeakReference< XLogger >& rLogger( m_aLoggerMap[ _rName ] );
+        Reference< XLogger > xLogger( rLogger );
+        if ( !xLogger.is() )
+        {
+            // never requested before, or already dead
+            xLogger = new EventLogger( m_xContext, _rName );
+            rLogger = xLogger;
+        }
+
+        return xLogger;
+    }
+
+    Reference< XLogger > SAL_CALL LoggerPool::getDefaultLogger(  )
+    {
+        return getNamedLogger( "org.openoffice.logging.DefaultLogger" );
+    }
+
+} // namespace logging
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *
+com_sun_star_comp_extensions_LoggerPool(
+    css::uno::XComponentContext *context,
+    css::uno::Sequence<css::uno::Any> const &)
+{
+    return cppu::acquire(new logging::LoggerPool(context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/logging/loggerconfig.cxx b/extensions/source/logging/loggerconfig.cxx
new file mode 100644
index 000000000..25ef76e02
--- /dev/null
+++ b/extensions/source/logging/loggerconfig.cxx
@@ -0,0 +1,283 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include "loggerconfig.hxx"
+#include <stdio.h>
+#include <string_view>
+
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <com/sun/star/container/XNameContainer.hpp>
+#include <com/sun/star/lang/XSingleServiceFactory.hpp>
+#include <com/sun/star/util/XChangesBatch.hpp>
+#include <com/sun/star/logging/LogLevel.hpp>
+#include <com/sun/star/lang/NullPointerException.hpp>
+#include <com/sun/star/lang/ServiceNotRegisteredException.hpp>
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/logging/XLogHandler.hpp>
+#include <com/sun/star/logging/XLogFormatter.hpp>
+
+#include <tools/diagnose_ex.h>
+#include <osl/process.h>
+
+#include <cppuhelper/component_context.hxx>
+
+
+namespace logging
+{
+
+
+    using ::com::sun::star::uno::Reference;
+    using ::com::sun::star::logging::XLogger;
+    using ::com::sun::star::lang::XMultiServiceFactory;
+    using ::com::sun::star::uno::Sequence;
+    using ::com::sun::star::uno::Any;
+    using ::com::sun::star::container::XNameContainer;
+    using ::com::sun::star::uno::UNO_QUERY_THROW;
+    using ::com::sun::star::lang::XSingleServiceFactory;
+    using ::com::sun::star::uno::XInterface;
+    using ::com::sun::star::util::XChangesBatch;
+    using ::com::sun::star::lang::NullPointerException;
+    using ::com::sun::star::uno::Exception;
+    using ::com::sun::star::lang::ServiceNotRegisteredException;
+    using ::com::sun::star::beans::NamedValue;
+    using ::com::sun::star::logging::XLogHandler;
+    using ::com::sun::star::logging::XLogFormatter;
+    using ::com::sun::star::container::XNameAccess;
+    using ::com::sun::star::uno::XComponentContext;
+
+    namespace LogLevel = ::com::sun::star::logging::LogLevel;
+
+    namespace
+    {
+
+        typedef void (*SettingTranslation)( const Reference< XLogger >&, const OUString&, Any& );
+
+
+        void    lcl_substituteFileHandlerURLVariables_nothrow( const Reference< XLogger >& _rxLogger, OUString& _inout_rFileURL )
+        {
+            struct Variable
+            {
+                std::u16string_view pVariablePattern;
+                OUString sVariableValue;
+            };
+
+            OUString sLoggerName;
+            try { sLoggerName = _rxLogger->getName(); }
+            catch( const Exception& ) { DBG_UNHANDLED_EXCEPTION("extensions.logging"); }
+
+            TimeValue aTimeValue;
+            oslDateTime aDateTime;
+            OSL_VERIFY( osl_getSystemTime( &aTimeValue ) );
+            OSL_VERIFY( osl_getDateTimeFromTimeValue( &aTimeValue, &aDateTime ) );
+
+            char buffer[ 30 ];
+            const size_t buffer_size = sizeof( buffer );
+
+            snprintf( buffer, buffer_size, "%04i-%02i-%02i",
+                      static_cast<int>(aDateTime.Year),
+                      static_cast<int>(aDateTime.Month),
+                      static_cast<int>(aDateTime.Day) );
+            OUString sDate = OUString::createFromAscii( buffer );
+
+            snprintf( buffer, buffer_size, "%02i-%02i-%02i.%03i",
+                static_cast<int>(aDateTime.Hours),
+                static_cast<int>(aDateTime.Minutes),
+                static_cast<int>(aDateTime.Seconds),
+                ::sal::static_int_cast< sal_Int16 >( aDateTime.NanoSeconds / 10000000 ) );
+            OUString sTime = OUString::createFromAscii( buffer );
+
+            OUString sDateTime = sDate + "." + sTime;
+
+            oslProcessIdentifier aProcessId = 0;
+            oslProcessInfo info;
+            info.Size = sizeof (oslProcessInfo);
+            if ( osl_getProcessInfo ( nullptr, osl_Process_IDENTIFIER, &info ) == osl_Process_E_None)
+                aProcessId = info.Ident;
+            OUString aPID = OUString::number( aProcessId );
+
+            Variable const aVariables[] =
+            {
+                {std::u16string_view(u"$(loggername)"), sLoggerName},
+                {std::u16string_view(u"$(date)"), sDate},
+                {std::u16string_view(u"$(time)"), sTime},
+                {std::u16string_view(u"$(datetime)"), sDateTime},
+                {std::u16string_view(u"$(pid)"), aPID}
+            };
+
+            for (Variable const & aVariable : aVariables)
+            {
+                sal_Int32 nVariableIndex = _inout_rFileURL.indexOf( aVariable.pVariablePattern );
+                if  (nVariableIndex >= 0)
+                {
+                    _inout_rFileURL = _inout_rFileURL.replaceAt( nVariableIndex, aVariable.pVariablePattern.size(), aVariable.sVariableValue );
+                }
+            }
+        }
+
+
+        void    lcl_transformFileHandlerSettings_nothrow( const Reference< XLogger >& _rxLogger, const OUString& _rSettingName, Any& _inout_rSettingValue )
+        {
+            if ( _rSettingName != "FileURL" )
+                // not interested in this setting
+                return;
+
+            OUString sURL;
+            OSL_VERIFY( _inout_rSettingValue >>= sURL );
+            lcl_substituteFileHandlerURLVariables_nothrow( _rxLogger, sURL );
+            _inout_rSettingValue <<= sURL;
+        }
+
+
+        Reference< XInterface > lcl_createInstanceFromSetting_throw(
+                const Reference<XComponentContext>& _rContext,
+                const Reference< XLogger >& _rxLogger,
+                const Reference< XNameAccess >& _rxLoggerSettings,
+                const char* _pServiceNameAsciiNodeName,
+                const char* _pServiceSettingsAsciiNodeName,
+                SettingTranslation _pSettingTranslation = nullptr
+            )
+        {
+            Reference< XInterface > xInstance;
+
+            // read the settings for the to-be-created service
+            Reference< XNameAccess > xServiceSettingsNode( _rxLoggerSettings->getByName(
+                OUString::createFromAscii( _pServiceSettingsAsciiNodeName ) ), UNO_QUERY_THROW );
+
+            Sequence< OUString > aSettingNames( xServiceSettingsNode->getElementNames() );
+            size_t nServiceSettingCount( aSettingNames.getLength() );
+            Sequence< NamedValue > aSettings( nServiceSettingCount );
+            if ( nServiceSettingCount )
+            {
+                const OUString* pSettingNames = aSettingNames.getConstArray();
+                const OUString* pSettingNamesEnd = aSettingNames.getConstArray() + aSettingNames.getLength();
+                NamedValue* pSetting = aSettings.getArray();
+
+                for (   ;
+                        pSettingNames != pSettingNamesEnd;
+                        ++pSettingNames, ++pSetting
+                    )
+                {
+                    pSetting->Name = *pSettingNames;
+                    pSetting->Value = xServiceSettingsNode->getByName( *pSettingNames );
+
+                    if ( _pSettingTranslation )
+                        _pSettingTranslation( _rxLogger, pSetting->Name, pSetting->Value );
+                }
+            }
+
+            OUString sServiceName;
+            _rxLoggerSettings->getByName( OUString::createFromAscii( _pServiceNameAsciiNodeName ) ) >>= sServiceName;
+            if ( !sServiceName.isEmpty() )
+            {
+                bool bSuccess = false;
+                if ( aSettings.hasElements() )
+                {
+                    Sequence< Any > aConstructionArgs{ Any(aSettings) };
+                    xInstance = _rContext->getServiceManager()->createInstanceWithArgumentsAndContext(sServiceName, aConstructionArgs, _rContext);
+                    bSuccess = xInstance.is();
+                }
+                else
+                {
+                    xInstance = _rContext->getServiceManager()->createInstanceWithContext(sServiceName, _rContext);
+                    bSuccess = xInstance.is();
+                }
+
+                if ( !bSuccess )
+                    throw ServiceNotRegisteredException( sServiceName );
+            }
+
+            return xInstance;
+        }
+    }
+
+
+    void initializeLoggerFromConfiguration( const Reference<XComponentContext>& _rContext, const Reference< XLogger >& _rxLogger )
+    {
+        try
+        {
+            if ( !_rxLogger.is() )
+                throw NullPointerException();
+
+            Reference< XMultiServiceFactory > xConfigProvider(
+                css::configuration::theDefaultProvider::get(_rContext));
+
+            // write access to the "Settings" node (which includes settings for all loggers)
+            Sequence<Any> aArguments{ Any(NamedValue(
+                "nodepath", Any(OUString("/org.openoffice.Office.Logging/Settings")))) };
+            Reference< XNameContainer > xAllSettings( xConfigProvider->createInstanceWithArguments(
+                "com.sun.star.configuration.ConfigurationUpdateAccess",
+                aArguments
+            ), UNO_QUERY_THROW );
+
+            OUString sLoggerName( _rxLogger->getName() );
+            if ( !xAllSettings->hasByName( sLoggerName ) )
+            {
+                // no node yet for this logger. Create default settings.
+                Reference< XSingleServiceFactory > xNodeFactory( xAllSettings, UNO_QUERY_THROW );
+                Reference< XInterface > xLoggerSettings( xNodeFactory->createInstance(), css::uno::UNO_SET_THROW );
+                xAllSettings->insertByName( sLoggerName, Any( xLoggerSettings ) );
+                Reference< XChangesBatch > xChanges( xAllSettings, UNO_QUERY_THROW );
+                xChanges->commitChanges();
+            }
+
+            // actually read and forward the settings
+            Reference< XNameAccess > xLoggerSettings( xAllSettings->getByName( sLoggerName ), UNO_QUERY_THROW );
+
+            // the log level
+            sal_Int32 nLogLevel( LogLevel::OFF );
+            OSL_VERIFY( xLoggerSettings->getByName("LogLevel") >>= nLogLevel );
+            _rxLogger->setLevel( nLogLevel );
+
+            // the default handler, if any
+            Reference< XInterface > xUntyped( lcl_createInstanceFromSetting_throw( _rContext, _rxLogger, xLoggerSettings, "DefaultHandler", "HandlerSettings", &lcl_transformFileHandlerSettings_nothrow ) );
+            if ( !xUntyped.is() )
+                // no handler -> we're done
+                return;
+            Reference< XLogHandler > xHandler( xUntyped, UNO_QUERY_THROW );
+            _rxLogger->addLogHandler( xHandler );
+
+            // The newly created handler might have an own (default) level. Ensure that it uses
+            // the same level as the logger.
+            xHandler->setLevel( nLogLevel );
+
+            // the default formatter for the handler
+            xUntyped = lcl_createInstanceFromSetting_throw( _rContext, _rxLogger, xLoggerSettings, "DefaultFormatter", "FormatterSettings" );
+            if ( !xUntyped.is() )
+                // no formatter -> we're done
+                return;
+            Reference< XLogFormatter > xFormatter( xUntyped, UNO_QUERY_THROW );
+            xHandler->setFormatter( xFormatter );
+
+            // TODO: we could first create the formatter, then the handler. This would allow
+            // passing the formatter as value in the component context, so the handler would
+            // not create an own default formatter
+        }
+        catch( const Exception& )
+        {
+            DBG_UNHANDLED_EXCEPTION("extensions.logging");
+        }
+    }
+
+
+} // namespace logging
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/logging/loggerconfig.hxx b/extensions/source/logging/loggerconfig.hxx
new file mode 100644
index 000000000..b08628cf1
--- /dev/null
+++ b/extensions/source/logging/loggerconfig.hxx
@@ -0,0 +1,50 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <com/sun/star/logging/XLogger.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+
+namespace logging
+{
+
+
+    /** initializes the given logger from the configuration
+
+        The configuration node /org.openoffice.Office.Logging/Settings/<logger_name>
+        is examined for this. If it does not yet exist, it will be created.
+
+        The function creates a default handler and a default formatter, as specified in the
+        configuration.
+
+        This function is currently external to the logger instance. Perhaps it can, on the long
+        run, be moved to the logger implementation - not sure if it's the best place.
+    */
+    void    initializeLoggerFromConfiguration(
+                const css::uno::Reference<css::uno::XComponentContext>& _rContext,
+                const css::uno::Reference< css::logging::XLogger >& _rxLogger
+            );
+
+
+} // namespace logging
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/logging/loghandler.cxx b/extensions/source/logging/loghandler.cxx
new file mode 100644
index 000000000..afc33605b
--- /dev/null
+++ b/extensions/source/logging/loghandler.cxx
@@ -0,0 +1,183 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include "loghandler.hxx"
+
+#include <com/sun/star/logging/LogLevel.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <com/sun/star/logging/PlainTextFormatter.hpp>
+
+#include <tools/diagnose_ex.h>
+#include <rtl/tencinfo.h>
+
+
+namespace logging
+{
+
+
+    using ::com::sun::star::uno::Reference;
+    using ::com::sun::star::uno::XComponentContext;
+    using ::com::sun::star::logging::LogRecord;
+    using ::com::sun::star::uno::UNO_QUERY_THROW;
+    using ::com::sun::star::logging::XLogFormatter;
+    using ::com::sun::star::uno::Exception;
+    using ::com::sun::star::lang::IllegalArgumentException;
+    using ::com::sun::star::lang::DisposedException;
+    using ::com::sun::star::logging::PlainTextFormatter;
+
+    namespace LogLevel = ::com::sun::star::logging::LogLevel;
+
+    LogHandlerHelper::LogHandlerHelper( const Reference< XComponentContext >& _rxContext, ::osl::Mutex& _rMutex, ::cppu::OBroadcastHelper& _rBHelper )
+        :m_eEncoding( RTL_TEXTENCODING_UTF8 )
+        ,m_nLevel( LogLevel::SEVERE )
+        ,m_xContext( _rxContext )
+        ,m_rMutex( _rMutex )
+        ,m_rBHelper( _rBHelper )
+        ,m_bInitialized( false )
+    {
+    }
+
+
+    void LogHandlerHelper::initFromSettings( const ::comphelper::NamedValueCollection& _rSettings )
+    {
+        OUString sEncoding;
+        if ( _rSettings.get_ensureType( "Encoding", sEncoding ) )
+        {
+            if ( !setEncoding( sEncoding ) )
+                throw IllegalArgumentException();
+        }
+
+        _rSettings.get_ensureType( "Formatter", m_xFormatter );
+        _rSettings.get_ensureType( "Level", m_nLevel );
+    }
+
+
+    void LogHandlerHelper::enterMethod()
+    {
+        m_rMutex.acquire();
+
+        if ( !m_bInitialized )
+            throw DisposedException("component not initialized" );
+
+        if ( m_rBHelper.bDisposed )
+            throw DisposedException("component already disposed" );
+
+        // fallback settings, in case they weren't passed at construction time
+        if ( !getFormatter().is() )
+        {
+            try
+            {
+                Reference< XLogFormatter > xFormatter( PlainTextFormatter::create( m_xContext ), css::uno::UNO_SET_THROW );
+                setFormatter( xFormatter );
+            }
+            catch( const Exception& )
+            {
+                DBG_UNHANDLED_EXCEPTION("extensions.logging");
+            }
+        }
+    }
+
+
+    bool LogHandlerHelper::getEncoding( OUString& _out_rEncoding ) const
+    {
+        const char* pMimeCharset = rtl_getMimeCharsetFromTextEncoding( m_eEncoding );
+        if ( pMimeCharset )
+        {
+            _out_rEncoding = OUString::createFromAscii( pMimeCharset );
+            return true;
+        }
+        _out_rEncoding.clear();
+        return false;
+    }
+
+
+    bool LogHandlerHelper::setEncoding( std::u16string_view _rEncoding )
+    {
+        OString sAsciiEncoding( OUStringToOString( _rEncoding, RTL_TEXTENCODING_ASCII_US ) );
+        rtl_TextEncoding eEncoding = rtl_getTextEncodingFromMimeCharset( sAsciiEncoding.getStr() );
+        if ( eEncoding != RTL_TEXTENCODING_DONTKNOW )
+        {
+            m_eEncoding = eEncoding;
+            return true;
+        }
+        return false;
+    }
+
+
+    bool LogHandlerHelper::formatForPublishing( const LogRecord& _rRecord, OString& _out_rEntry ) const
+    {
+        if ( _rRecord.Level < getLevel() )
+            // not to be published due to low level
+            return false;
+
+        try
+        {
+            Reference< XLogFormatter > xFormatter( getFormatter(), css::uno::UNO_SET_THROW );
+            OUString sEntry( xFormatter->format( _rRecord ) );
+            _out_rEntry = OUStringToOString( sEntry, getTextEncoding() );
+            return true;
+        }
+        catch( const Exception& )
+        {
+            DBG_UNHANDLED_EXCEPTION("extensions.logging");
+        }
+        return false;
+    }
+
+
+    bool LogHandlerHelper::getEncodedHead( OString& _out_rHead ) const
+    {
+        try
+        {
+            Reference< XLogFormatter > xFormatter( getFormatter(), css::uno::UNO_SET_THROW );
+            OUString sHead( xFormatter->getHead() );
+            _out_rHead = OUStringToOString( sHead, getTextEncoding() );
+            return true;
+        }
+        catch( const Exception& )
+        {
+            DBG_UNHANDLED_EXCEPTION("extensions.logging");
+        }
+        return false;
+    }
+
+
+    bool LogHandlerHelper::getEncodedTail( OString& _out_rTail ) const
+    {
+        try
+        {
+            Reference< XLogFormatter > xFormatter( getFormatter(), css::uno::UNO_SET_THROW );
+            OUString sTail( xFormatter->getTail() );
+            _out_rTail = OUStringToOString( sTail, getTextEncoding() );
+            return true;
+        }
+        catch( const Exception& )
+        {
+            DBG_UNHANDLED_EXCEPTION("extensions.logging");
+        }
+        return false;
+    }
+
+
+} // namespace logging
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/logging/loghandler.hxx b/extensions/source/logging/loghandler.hxx
new file mode 100644
index 000000000..02f4fb773
--- /dev/null
+++ b/extensions/source/logging/loghandler.hxx
@@ -0,0 +1,142 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <string_view>
+
+#include <com/sun/star/logging/XLogFormatter.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/logging/LogRecord.hpp>
+
+#include <comphelper/namedvaluecollection.hxx>
+#include <cppuhelper/interfacecontainer.hxx>
+#include <rtl/string.hxx>
+
+
+namespace logging
+{
+
+    class LogHandlerHelper
+    {
+    private:
+        // <attributes>
+        rtl_TextEncoding            m_eEncoding;
+        sal_Int32                   m_nLevel;
+        css::uno::Reference< css::logging::XLogFormatter >
+                                    m_xFormatter;
+        // <//attributes>
+
+        css::uno::Reference< css::uno::XComponentContext >
+                                    m_xContext;
+        ::osl::Mutex&               m_rMutex;
+        ::cppu::OBroadcastHelper&   m_rBHelper;
+        bool                        m_bInitialized;
+
+    public:
+        LogHandlerHelper(
+            const css::uno::Reference< css::uno::XComponentContext >& _rxContext,
+            ::osl::Mutex& _rMutex,
+            ::cppu::OBroadcastHelper& _rBHelper
+        );
+
+    public:
+        void    setIsInitialized() { m_bInitialized = true; }
+
+        bool    getEncoding(        OUString& _out_rEncoding ) const;
+        bool    setEncoding( std::u16string_view _rEncoding  );
+
+        rtl_TextEncoding
+                getTextEncoding() const { return m_eEncoding; }
+
+        const css::uno::Reference< css::logging::XLogFormatter >&
+                getFormatter() const { return m_xFormatter; }
+        void
+                setFormatter( const css::uno::Reference< css::logging::XLogFormatter >& _rxFormatter )
+                {
+                    m_xFormatter = _rxFormatter;
+                }
+
+        sal_Int32
+                getLevel() const { return m_nLevel; }
+        void
+                setLevel( const sal_Int32 _nLevel )
+                {
+                    m_nLevel = _nLevel;
+                }
+
+        /** prepares implementation of a public accessible method of a log handler
+
+            <code>enterMethod</code> does the following things:
+            <ul><li>It acquires the mutex given in the constructor.</li>
+                <li>It checks whether the component is already initialized, and throws an exception if not os.</li>
+                <li>It checks whether the component is already disposed, and throws an exception if not os.</li>
+                <li>It creates a default formatter (PlainTextFormatter), if no formatter exists at this time.</li>
+            </ul>
+        */
+        void enterMethod();
+
+        /** formats a record for publishing it
+
+            The method first checks whether the records log level is greater or equal our own
+            log level. If not, <FALSE/> is returned.
+
+            Second, our formatter is used to create a unicode string from the log record. If an error occurs
+            during this, e.g. if the formatter is <NULL/> or throws an exception during formatting,
+            <FALSE/> is returned.
+
+            Finally, the unicode string is encoded into a byte string, using our encoding setting. Then,
+            <TRUE/> is returned.
+        */
+        bool    formatForPublishing( const css::logging::LogRecord& _rRecord, OString& _out_rEntry ) const;
+
+        /** retrieves our formatter's heading, encoded with our encoding
+
+            @return <TRUE/> in case of success, <FALSE/> if any error occurred
+        */
+        bool    getEncodedHead( OString& _out_rHead ) const;
+
+        /** retrieves our formatter's tail, encoded with our encoding
+
+            @return <TRUE/> in case of success, <FALSE/> if any error occurred
+        */
+        bool    getEncodedTail( OString& _out_rTail ) const;
+
+        /** initializes the instance from a collection of named settings
+
+            The recognized named settings are <code>Encoding</code>, <code>Formatter</code>, and <code>Level</code>,
+            which initialize the respective attributes.
+
+            Settings which are recognized are remove from the given collection. This allows
+            the caller to determine whether or not the collection contained any unsupported
+            items, and react appropriately.
+
+            @throws IllegalArgumentException
+                if one of the values in the collection is of wrong type.
+        */
+        void    initFromSettings( const ::comphelper::NamedValueCollection& _rSettings );
+    };
+
+
+} // namespace logging
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/logging/logrecord.cxx b/extensions/source/logging/logrecord.cxx
new file mode 100644
index 000000000..26f59e841
--- /dev/null
+++ b/extensions/source/logging/logrecord.cxx
@@ -0,0 +1,86 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include "logrecord.hxx"
+
+#include <osl/time.h>
+#include <osl/thread.h>
+#include <osl/thread.hxx>
+#include <osl/diagnose.h>
+
+
+namespace logging
+{
+
+
+    using ::com::sun::star::logging::LogRecord;
+    using ::com::sun::star::util::DateTime;
+
+    namespace
+    {
+        /** returns a string representation of the current thread
+
+            @todo
+                We need a way to retrieve the current UNO thread ID as string,
+                which is issue #i77342#
+        */
+        OUString getCurrentThreadID()
+        {
+            oslThreadIdentifier nThreadID( osl::Thread::getCurrentIdentifier() );
+            return OUString::number( static_cast<sal_Int64>(nThreadID) );
+        }
+    }
+
+
+    LogRecord createLogRecord( const OUString& _rLoggerName, const OUString& _rClassName,
+        const OUString& _rMethodName, const OUString& _rMessage,
+        sal_Int32 _nLogLevel, oslInterlockedCount _nEventNumber )
+    {
+        TimeValue aTimeValue;
+        osl_getSystemTime( &aTimeValue );
+
+        oslDateTime aDateTime;
+        OSL_VERIFY( osl_getDateTimeFromTimeValue( &aTimeValue, &aDateTime ) );
+
+        DateTime aTimeStamp;
+        aTimeStamp.Year = aDateTime.Year;
+        aTimeStamp.Month = aDateTime.Month;
+        aTimeStamp.Day = aDateTime.Day;
+        aTimeStamp.Hours = aDateTime.Hours;
+        aTimeStamp.Minutes = aDateTime.Minutes;
+        aTimeStamp.Seconds = aDateTime.Seconds;
+        aTimeStamp.NanoSeconds = aDateTime.NanoSeconds;
+
+        return LogRecord(
+            _rLoggerName,
+            _rClassName,
+            _rMethodName,
+            _rMessage,
+            aTimeStamp,
+            _nEventNumber,
+            getCurrentThreadID(),
+            _nLogLevel
+        );
+    }
+
+
+} // namespace logging
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/logging/logrecord.hxx b/extensions/source/logging/logrecord.hxx
new file mode 100644
index 000000000..ad6e350cf
--- /dev/null
+++ b/extensions/source/logging/logrecord.hxx
@@ -0,0 +1,53 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <com/sun/star/logging/LogRecord.hpp>
+
+#include <osl/interlck.h>
+
+
+namespace logging
+{
+
+    css::logging::LogRecord createLogRecord(
+        const OUString& _rLoggerName,
+        const OUString& _rClassName,
+        const OUString& _rMethodName,
+        const OUString& _rMessage,
+        sal_Int32 _nLogLevel,
+        oslInterlockedCount _nEventNumber
+    );
+
+    inline css::logging::LogRecord createLogRecord(
+        const OUString& _rLoggerName,
+        const OUString& _rMessage,
+        sal_Int32 _nLogLevel,
+        oslInterlockedCount _nEventNumber
+    )
+    {
+        return createLogRecord( _rLoggerName, OUString(), OUString(), _rMessage, _nLogLevel, _nEventNumber );
+    }
+
+
+} // namespace logging
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/logging/methodguard.hxx b/extensions/source/logging/methodguard.hxx
new file mode 100644
index 000000000..189462eae
--- /dev/null
+++ b/extensions/source/logging/methodguard.hxx
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+
+namespace logging
+{
+    template < class COMPONENT >
+    class ComponentMethodGuard
+    {
+    private:
+        COMPONENT&  m_rHandler;
+
+    public:
+        class Access
+        {
+        private:
+            friend class ComponentMethodGuard;
+            Access() { }
+        };
+
+    public:
+        explicit ComponentMethodGuard( COMPONENT& _rHandler )
+            :m_rHandler( _rHandler )
+        {
+            m_rHandler.enterMethod( Access() );
+        }
+        ~ComponentMethodGuard()
+        {
+            m_rHandler.leaveMethod( Access() );
+        }
+    };
+
+
+} // namespace logging
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/logging/plaintextformatter.cxx b/extensions/source/logging/plaintextformatter.cxx
new file mode 100644
index 000000000..23392b61c
--- /dev/null
+++ b/extensions/source/logging/plaintextformatter.cxx
@@ -0,0 +1,154 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <com/sun/star/logging/XLogFormatter.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+#include <rtl/ustrbuf.hxx>
+#include <osl/thread.h>
+
+#include <stdio.h>
+
+namespace logging
+{
+    using ::com::sun::star::uno::XComponentContext;
+    using ::com::sun::star::uno::Sequence;
+    using ::com::sun::star::logging::LogRecord;
+    using ::com::sun::star::uno::XInterface;
+
+    namespace {
+
+    class PlainTextFormatter : public cppu::WeakImplHelper<css::logging::XLogFormatter, css::lang::XServiceInfo>
+    {
+    public:
+        PlainTextFormatter();
+
+    private:
+        // XLogFormatter
+        virtual OUString SAL_CALL getHead(  ) override;
+        virtual OUString SAL_CALL format( const LogRecord& Record ) override;
+        virtual OUString SAL_CALL getTail(  ) override;
+
+        // XServiceInfo
+        virtual OUString SAL_CALL getImplementationName() override;
+        virtual sal_Bool SAL_CALL supportsService( const OUString& _rServiceName ) override;
+        virtual Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+    };
+
+    }
+
+    PlainTextFormatter::PlainTextFormatter()
+    {
+    }
+
+    OUString SAL_CALL PlainTextFormatter::getHead(  )
+    {
+        return
+            "  event no"                 // column 1: the event number
+            " "
+            "thread  "                   // column 2: the thread ID
+            " "
+            "date      "                 // column 3: date
+            " "
+            "time       "                // column 4: time
+            " "
+            "(class/method:) message"    // column 5: class/method/message
+            "\n";
+    }
+
+
+    OUString SAL_CALL PlainTextFormatter::format( const LogRecord& _rRecord )
+    {
+        char buffer[ sizeof("-32768-65535-65535 65535:65535:65535.4294967295") ];
+            // reserve enough space for hypothetical max length
+        const int buffer_size = sizeof( buffer );
+        int used = snprintf( buffer, buffer_size, "%10i", static_cast<int>(_rRecord.SequenceNumber) );
+        if ( used >= buffer_size || used < 0 )
+            buffer[ buffer_size - 1 ] = 0;
+
+        OUStringBuffer aLogEntry;
+        aLogEntry.appendAscii( buffer );
+        aLogEntry.append( " " );
+
+        OString sThreadID( OUStringToOString( _rRecord.ThreadID, osl_getThreadTextEncoding() ) );
+        snprintf( buffer, buffer_size, "%8s", sThreadID.getStr() );
+        aLogEntry.appendAscii( buffer );
+        aLogEntry.append( " " );
+
+        snprintf( buffer, buffer_size, "%04" SAL_PRIdINT32 "-%02" SAL_PRIuUINT32 "-%02" SAL_PRIuUINT32 " %02" SAL_PRIuUINT32 ":%02" SAL_PRIuUINT32 ":%02" SAL_PRIuUINT32 ".%09" SAL_PRIuUINT32,
+            static_cast<sal_Int32>(_rRecord.LogTime.Year), static_cast<sal_uInt32>(_rRecord.LogTime.Month), static_cast<sal_uInt32>(_rRecord.LogTime.Day),
+            static_cast<sal_uInt32>(_rRecord.LogTime.Hours), static_cast<sal_uInt32>(_rRecord.LogTime.Minutes), static_cast<sal_uInt32>(_rRecord.LogTime.Seconds), _rRecord.LogTime.NanoSeconds );
+        aLogEntry.appendAscii( buffer );
+        aLogEntry.append( " " );
+
+        if ( !(_rRecord.SourceClassName.isEmpty() || _rRecord.SourceMethodName.isEmpty()) )
+        {
+            aLogEntry.append( _rRecord.SourceClassName );
+            aLogEntry.append( "::" );
+            aLogEntry.append( _rRecord.SourceMethodName );
+            aLogEntry.append( ": " );
+        }
+
+        aLogEntry.append( _rRecord.Message );
+        aLogEntry.append( "\n" );
+
+        return aLogEntry.makeStringAndClear();
+    }
+
+
+    OUString SAL_CALL PlainTextFormatter::getTail(  )
+    {
+        // no tail
+        return OUString();
+    }
+
+    sal_Bool SAL_CALL PlainTextFormatter::supportsService( const OUString& _rServiceName )
+    {
+        return cppu::supportsService(this, _rServiceName);
+    }
+
+
+    OUString SAL_CALL PlainTextFormatter::getImplementationName()
+    {
+        return "com.sun.star.comp.extensions.PlainTextFormatter";
+    }
+
+    Sequence< OUString > SAL_CALL PlainTextFormatter::getSupportedServiceNames()
+    {
+        return { "com.sun.star.logging.PlainTextFormatter" };
+    }
+
+} // namespace logging
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *
+com_sun_star_comp_extensions_PlainTextFormatter(
+    css::uno::XComponentContext *,
+    css::uno::Sequence<css::uno::Any> const &)
+{
+    return cppu::acquire(new logging::PlainTextFormatter());
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/extensions/source/logging/simpletextformatter.cxx b/extensions/source/logging/simpletextformatter.cxx
new file mode 100644
index 000000000..b54fea5a6
--- /dev/null
+++ b/extensions/source/logging/simpletextformatter.cxx
@@ -0,0 +1,98 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <com/sun/star/logging/XLogFormatter.hpp>
+#include <com/sun/star/logging/LogLevel.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+namespace logging
+{
+using css::logging::LogRecord;
+using namespace css::uno;
+
+namespace
+{
+class SimpleTextFormatter
+    : public cppu::WeakImplHelper<css::logging::XLogFormatter, css::lang::XServiceInfo>
+{
+public:
+    SimpleTextFormatter();
+
+private:
+    // XLogFormatter
+    virtual OUString SAL_CALL getHead() override;
+    virtual OUString SAL_CALL format(const LogRecord& Record) override;
+    virtual OUString SAL_CALL getTail() override;
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService(const OUString& _rServiceName) override;
+    virtual Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+};
+}
+
+SimpleTextFormatter::SimpleTextFormatter() {}
+
+OUString SAL_CALL SimpleTextFormatter::getHead() { return OUString(); }
+
+OUString SAL_CALL SimpleTextFormatter::format(const LogRecord& _rRecord)
+{
+    OUString aLogEntry;
+    // Highlight warnings
+    if (_rRecord.Level == css::logging::LogLevel::SEVERE)
+        aLogEntry = "ERROR: ";
+    else if (_rRecord.Level == css::logging::LogLevel::WARNING)
+        aLogEntry = "WARNING: ";
+
+    return aLogEntry + _rRecord.Message + "\n";
+}
+
+OUString SAL_CALL SimpleTextFormatter::getTail() { return OUString(); }
+
+sal_Bool SAL_CALL SimpleTextFormatter::supportsService(const OUString& _rServiceName)
+{
+    return cppu::supportsService(this, _rServiceName);
+}
+
+OUString SAL_CALL SimpleTextFormatter::getImplementationName()
+{
+    return "com.sun.star.comp.extensions.SimpleTextFormatter";
+}
+
+Sequence<OUString> SAL_CALL SimpleTextFormatter::getSupportedServiceNames()
+{
+    return { "com.sun.star.logging.SimpleTextFormatter" };
+}
+
+} // namespace logging
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_extensions_SimpleTextFormatter(css::uno::XComponentContext*,
+                                                 css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new logging::SimpleTextFormatter());
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */