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| -rw-r--r-- | framework/source/fwi/jobs/configaccess.cxx | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/framework/source/fwi/jobs/configaccess.cxx b/framework/source/fwi/jobs/configaccess.cxx new file mode 100644 index 000000000..bcb739c09 --- /dev/null +++ b/framework/source/fwi/jobs/configaccess.cxx @@ -0,0 +1,179 @@ +/* -*- 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 <jobs/configaccess.hxx> +#include <services.h> + +#include <com/sun/star/configuration/theDefaultProvider.hpp> +#include <com/sun/star/beans/PropertyValue.hpp> +#include <com/sun/star/util/XChangesBatch.hpp> + +#include <tools/diagnose_ex.h> + +namespace framework{ + +/** + @short open the configuration of this job + @descr We open the configuration of this job only. Not the whole package or the whole + job set. We are interested on our own properties only. + We set the opened configuration access as our member. So any following method, + which needs cfg access, can use it. That prevent us against multiple open/close requests. + But you can use this method to upgrade an already opened configuration too. + + @param eMode + force opening of the configuration access in readonly or in read/write mode + */ +ConfigAccess::ConfigAccess( /*IN*/ const css::uno::Reference< css::uno::XComponentContext >& rxContext, + /*IN*/ const OUString& sRoot ) + : m_xContext ( rxContext) + , m_sRoot ( sRoot ) + , m_eMode ( E_CLOSED ) +{ +} + +/** + @short last chance to close an open configuration access point + @descr In case our user forgot to close this configuration point + in the right way, normally he will run into some trouble - + e.g. losing data. + */ +ConfigAccess::~ConfigAccess() +{ + close(); +} + +/** + @short return the internal mode of this instance + @descr May be the outside user need any information about successfully opened + or closed config access point objects. He can control the internal mode to do so. + + @return The internal open state of this object. + */ +ConfigAccess::EOpenMode ConfigAccess::getMode() const +{ + osl::MutexGuard g(m_mutex); + return m_eMode; +} + +/** + @short open the configuration access in the specified mode + @descr We set the opened configuration access as our member. So any following method, + which needs cfg access, can use it. That prevent us against multiple open/close requests. + But you can use this method to upgrade an already opened configuration too. + It's possible to open a config access in READONLY mode first and "open" it at a second + time within the mode READWRITE. Then we will upgrade it. Downgrade will be possible too. + + But note: closing will be done explicitly by calling method close() ... not by + downgrading with mode CLOSED! + + @param eMode + force (re)opening of the configuration access in readonly or in read/write mode + */ +void ConfigAccess::open( /*IN*/ EOpenMode eMode ) +{ + osl::MutexGuard g(m_mutex); + + // check if configuration is already open in the right mode. + // By the way: Don't allow closing by using this method! + if ( eMode == E_CLOSED || m_eMode == eMode ) + return; + + // We have to close the old access point without any question here. + // It will be open again using the new mode. + // can be called without checks! It does the checks by itself ... + // e.g. for already closed or not opened configuration. + // Flushing of all made changes will be done here too. + close(); + + // create the configuration provider, which provides sub access points + css::uno::Reference< css::lang::XMultiServiceFactory > xConfigProvider = css::configuration::theDefaultProvider::get(m_xContext); + css::beans::PropertyValue aParam; + aParam.Name = "nodepath"; + aParam.Value <<= m_sRoot; + + css::uno::Sequence< css::uno::Any > lParams(1); + lParams[0] <<= aParam; + + // open it + try + { + if (eMode==E_READONLY) + m_xConfig = xConfigProvider->createInstanceWithArguments(SERVICENAME_CFGREADACCESS , lParams); + else + if (eMode==E_READWRITE) + m_xConfig = xConfigProvider->createInstanceWithArguments(SERVICENAME_CFGUPDATEACCESS, lParams); + } + catch(const css::uno::Exception&) + { + TOOLS_INFO_EXCEPTION("fwk", "open config"); + } + + m_eMode = E_CLOSED; + if (m_xConfig.is()) + m_eMode = eMode; +} + +/** + @short close the internal opened configuration access and flush all changes + @descr It checks, if the given access is valid and react in the right way. + It flushes all changes ... so nobody else must know this state. + */ +void ConfigAccess::close() +{ + osl::MutexGuard g(m_mutex); + // check already closed configuration + if (m_xConfig.is()) + { + css::uno::Reference< css::util::XChangesBatch > xFlush(m_xConfig, css::uno::UNO_QUERY); + if (xFlush.is()) + xFlush->commitChanges(); + m_xConfig.clear(); + m_eMode = E_CLOSED; + } +} + +/** + @short provides an access to the internal wrapped configuration access + @descr It's not allowed to safe this c++ (!) reference outside. You have + to use it directly. Further you must use our public lock member m_aLock + to synchronize your code with our internal structures and our interface + methods. Acquire it before you call cfg() and release it afterwards immediately. + + E.g.: ConfigAccess aAccess(...); + Guard aReadLock(aAccess.m_aLock); + Reference< XPropertySet > xSet(aAccess.cfg(), UNO_QUERY); + Any aProp = xSet->getPropertyValue("..."); + aReadLock.unlock(); + + @attention During this time it's not allowed to call the methods open() or close()! + Otherwise you will change your own referenced config access. Anything will + be possible then. + + @return A c++(!) reference to the uno instance of the configuration access point. + */ +const css::uno::Reference< css::uno::XInterface >& ConfigAccess::cfg() +{ + // must be synchronized from outside! + // => no lock here ... + return m_xConfig; +} + +} // namespace framework + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |