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diff --git a/include/jvmfwk/framework.hxx b/include/jvmfwk/framework.hxx new file mode 100644 index 000000000..8f7eb8a2a --- /dev/null +++ b/include/jvmfwk/framework.hxx @@ -0,0 +1,671 @@ +/* -*- 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 . + */ + +/** @HTML */ + +#ifndef INCLUDED_JVMFWK_FRAMEWORK_HXX +#define INCLUDED_JVMFWK_FRAMEWORK_HXX + +#include <sal/config.h> + +#include <memory> +#include <vector> + +#include <jvmfwk/jvmfwkdllapi.hxx> +#include <rtl/byteseq.hxx> +#include <rtl/ustring.hxx> +#if defined __clang__ +#pragma clang diagnostic push +#pragma clang diagnostic ignored "-Wunknown-attributes" +#endif +#include <jni.h> +#if defined __clang__ +#pragma clang diagnostic pop +#endif + +/** @file + <p>This library can operate in two modes, application mode and direct mode.</p> + + + <h2>Application Mode</h2> + In application mode the Java related settings are stored in files. + There are currently three files which need to be accessed. They are determined + by bootstrap parameters:</p> + <dl> + <dt>UNO_JAVA_JFW_VENDOR_SETTINGS</dt> + <dd>contains vendor and version information about JREs as well as the + location of plugin-libraries which are responsible for providing information + about these JREs as well as starting the VMs.</dd> + <dt>UNO_JAVA_JFW_USER_DATA</dt> + <dd>The file contains settings for a particular user. One can use the macro + $SYSUSERCONFIG in the URL which expands to a directory where the user's data are + kept. On UNIX this would be the home directory and on Windows some sub-directory + of the "Documents and Settings" folder.The content of this file is an + implementation detail and may change in the future.</dd> + <dt>UNO_JAVA_JFW_SHARED_DATA</dt> + <dd>The file contains settings valid for all users. If a user changes a setting + then it takes precedence over the setting from UNO_JAVA_JFW_SHARED_DATA. + The content of this file is an implementation detail and may change in the future.</dd> + </dl> + + <p>The values for these parameters must be file URLs and include the file name, for + example:<br> + file:///d:/MyApp/javavendors.xml<br> + All files are XML files and must have the extension .xml.</p> + <p> + Modifying the shared settings is currently not supported by the framework. To provide + Java settings for all users one can run OOo and change the settings in the + options dialog. These settings are made persistent in the UNO_JAVA_JFW_USER_DATA. + The file can then be copied into the base installation. + Other users will use automatically these data but can override the settings in + the options dialog. This mechanism may change in the future. + </p> + <p>If shared Java settings are not supported by an application then it is not + necessary to specify the bootstrap parameter <code>UNO_JAVA_JFW_SHARED_DATA</code>. + </p> + + <p>Setting the class path used by a Java VM should not be necessary. The locations + of Jar files should be known by a class loader. If a jar file depends on another + jar file then it can be referenced in the manifest file of the first jar. However, + a user may add jars to the class path by using this API. If it becomes necessary + to add files to the class path which is to be used by all users then one can use + the bootstrap parameter UNO_JAVA_JFW_CLASSPATH_URLS. The value contains of file URLs + which must be separated by spaces.</p> + + + <h2>Direct Mode</h2> + + <p>The direct mode is intended for a scenario where no configuration files + are available and a Java VM shall be run. That is, + the files containing the user and shared settings are not specified by the + bootstrap parameters UNO_JAVA_JFW_SHARED_DATA and UNO_JAVA_JFW_USER_DATA. + For example, tools, such as regcomp, may use this framework in a build + environment. Then one would want to use settings which have been specified + by the build environment. The framework would automatically use the + current settings when they change in the environment. + </p> + + <p> Here are examples how regcomp could be invoked using bootstrap parameters: + </p> + <p> + regcomp -env:UNO_JAVA_JFW_JREHOME=file:///d:/j2re1.4.2 + -env:"UNO_JAVA_JFW_CLASSPATH=d:\\solver\\bin\\classes.jar;d:\\solver\\bin\\libreoffice.jar" + -register... + </p> + <p>If UNO_JAVA_JFW_VENDOR_SETTINGS is not set then a plugin library must be specified. For example:</p> + <p> + regcomp -env:UNO_JAVA_JFW_JREHOME=file:///d:/j2re1.4.2 + -env:"UNO_JAVA_JFW_CLASSPATH=d:\\solver\\bin\\classes.jar;d:\\solver\\bin\\libreoffice.jar" + -register... + </p> + <p>Additional parameters for the Java VM can be provided. For every parameter + a separate bootstrap parameter must be specified. The names are + <code>UNO_JAVA_JFW_PARAMETER_X</code>, where X is 1,2, .. n. For example:</p> + <p> + regcomp -env:UNO_JAVA_JFW_PARAMETER_1=-Xdebug + -env:UNO_JAVA_JFW_PARAMETER_2=-Xrunjdwp:transport=dt_socket,server=y,address=8100 + -env:UNO_JAVA_JFW_JREHOME=file:///d:/j2re1.4.2 + -env:"UNO_JAVA_JFW_CLASSPATH=d:\\solver\\bin\\classes.jar;d:\\solver\\bin\\libreoffice.jar" + -register...</p> + <p> + Here is a complete list of the bootstrap parameter for the direct mode: + </p> + <dl> + <dt>UNO_JAVA_JFW_JREHOME</dt> + <dd>Specifies a file URL to a JRE installation.It must ALWAYS be specified + in direct mode</dd> + <dt>UNO_JAVA_JFW_ENV_JREHOME</dt> + <dd>Setting this parameter, for example to "1" or "true", + causes the framework to use the environment variable JAVA_HOME. It is expected + that JAVA_HOME contains a system path rather than a file URL. This parameter + and UNO_JAVA_JFW_JREHOME are mutually exclusive</dd> + <dt>UNO_JAVA_JFW_CLASSPATH</dt> + <dd>Contains the class path which is to be used by the VM. Special character, + such as '\','{','}','$' must be preceded with '\'. See documentation about the + bootstrap parameter.</dd> + <dt>UNO_JAVA_JFW_ENV_CLASSPATH</dt> + <dd>Setting this parameter,for example to "1" or "true", + causes the framework to use the + environment variable CLASSPATH. If this variable and UNO_JAVA_JFW_CLASSPATH are + set then the class path is composed from UNO_JAVA_JFW_CLASSPATH and the environment + variable CLASSPATH.</dd> + <dt>UNO_JAVA_JFW_PARAMETER_X</dt> + <dd>Specifies a parameter for the Java VM. The X is replaced by + non-negative natural numbers starting with 1.</dd> + </dl> + + <p>A note about bootstrap parameters. The implementation of the bootstrap + parameter mechanism interprets the characters '\', '$', '{', '}' as + escape characters. That's why the Windows path contain double back-slashes. + One should also take into account that a console may have also special + escape characters.</p> + + <h2>What mode is used</h2> + <p> + The default mode is application mode. If at least one bootstrap parameter + for the direct mode is provided then direct mode is used. </p> + + <p> + All settings made by this API are done for the current user if not + mentioned differently.</p> +*/ + +/** indicates that there must be an environment set up before the Java process + runs. + <p>Therefore, when a Java is selected in OO then the office must be + restarted, so that the changes can take effect.</p> + */ +#define JFW_REQUIRE_NEEDRESTART 0x1l + +/** error codes which are returned by functions of this API. + */ +enum javaFrameworkError +{ + JFW_E_NONE, + JFW_E_ERROR, + JFW_E_NO_SELECT, + JFW_E_INVALID_SETTINGS, + JFW_E_NEED_RESTART, + JFW_E_RUNNING_JVM, + JFW_E_JAVA_DISABLED, + JFW_E_NOT_RECOGNIZED, + JFW_E_FAILED_VERSION, + JFW_E_NO_JAVA_FOUND, + JFW_E_VM_CREATION_FAILED, + JFW_E_CONFIGURATION, + JFW_E_DIRECT_MODE +}; + +/** an instance of this struct represents an installation of a Java + Runtime Environment (JRE). + + <p> + Instances of this struct are created by the plug-in libraries which are used by + this framework (jvmfwk/vendorplugin.h).</p> + */ +struct JavaInfo +{ + /** contains the vendor. + + <p>string must be the same as the one obtained from the + Java system property <code>java.vendor</code>. + </p> + */ + OUString sVendor; + /** contains the file URL to the installation directory. + */ + OUString sLocation; + /** contains the version of this Java distribution. + + <p>The version string must adhere to the rules + about how a version string has to be formed. These rules may + be vendor-dependent. Essentially the strings must syntactically + equal the Java system property <code>java.version</code>. + </p> + */ + OUString sVersion; + /** indicates requirements for running the java runtime. + + <p>For example, it may be necessary to prepare the environment before + the runtime is created. That could mean, setting the + <code>LD_LIBRARY_PATH</code> + when <code>nRequirements</code> contains the flag + <code>JFW_REQUIRE_NEEDRESTART</code></p> + */ + sal_uInt64 nRequirements; + /** contains data needed for the creation of the java runtime. + + <p>There is no rule about the format and content of the sequence's + values. The plug-in libraries can put all data, necessary for + starting the java runtime into this sequence. </p> + */ + rtl::ByteSequence arVendorData; +}; + +/** compares two <code>JavaInfo</code> objects for equality. + + <p>Two <code>JavaInfo</code> objects are said to be equal if the contained + members of the first <code>JavaInfo</code> are equal to their counterparts + in the second <code>JavaInfo</code> object. The equality of the + <code>OUString</code> members is determined + by <code>operator ==</code>. + Similarly the equality of the <code>rtl::ByteSequence</code> is + also determined by a comparison + function (see <code>rtl::ByteSequence::operator ==</code>). </p> + <p> + Both argument pointers must be valid.</p> + @param pInfoA + the first argument. + @param pInfoB + the second argument which is compared with the first. + @return + true - both object represent the same JRE.</br> + false - the objects represent different JREs + */ +JVMFWK_DLLPUBLIC bool jfw_areEqualJavaInfo(JavaInfo const* pInfoA, JavaInfo const* pInfoB); + +/** determines if a Java Virtual Machine is already running. + + <p>As long as the office and the JREs only support one + Virtual Machine per process the Java settings, particularly the + selected Java, are not effective immediately after changing when + a VM has already been running. That is, if a JRE A was used to start + a VM and then a JRE B is selected, then JRE B will only be used + after a restart of the office.</p> + <p> + By determining if a VM is running, the user can be presented a message, + that the changed setting may not be effective immediately.</p> + + @return + true iff a VM is running. +*/ +JVMFWK_DLLPUBLIC bool jfw_isVMRunning(); + +/** detects a suitable JRE and configures the framework to use it. + + <p>Which JREs can be used is determined by the file javavendors.xml, + which contains version requirements.</p> + <p> + JREs can be provided by different vendors. + The function obtains information about JRE installations. If none was + found then it also uses a list of paths, which have been registered + by <code>jfw_addJRELocation</code> + to find JREs. Found JREs are examined in the same way.</p> + <p> + A JRE installation is only selected if it meets the version requirements. + Information about the selected JRE are made persistent so that + subsequent calls to <code>jfw_getSelectedJRE</code> returns this + information.</p> + <p> + While determining a proper JRE this function takes into account if a + user requires support for assistive technology tools. If user + need that support they have to set up their system accordingly.</p> + <p> + If the JAVA_HOME environment variable is set, this function prefers + the JRE which the variable refers to over other JREs. + If JAVA_HOME is not set or does not refer to a suitable JRE, + the PATH environment variable is inspected and the respective JREs + are checked for their suitability next.</p> + <p> + The first <code>JavaInfo</code> object that is detected by the algorithm + as described above is used.</p> + + @param pInfo + [out] a <code>JavaInfo</code> pointer, representing the selected JRE. + The <code>JavaInfo</code> is for informational purposes only. It is not + necessary to call <code>jfw_setSelectedJRE</code> afterwards.<br/> + <code>pInfo</code>can be NULL. + + @return + JFW_E_NONE function ran successfully.<br/> + JFW_E_ERROR an error occurred. <br/> + JFW_E_NO_JAVA_FOUND no JRE was found that meets the requirements.</br> + JFW_E_DIRECT_MODE the function cannot be used in this mode. </br> + JFW_E_CONFIGURATION mode was not properly set or their prerequisites + were not met. + */ +JVMFWK_DLLPUBLIC javaFrameworkError jfw_findAndSelectJRE(std::unique_ptr<JavaInfo>* pInfo); + +/** provides information about all available JRE installations. + + <p>The function determines dynamically what JREs are available. It uses + the plug-in libraries to provide lists of available <code>JavaInfo</code> + objects where each object represents a JRE (see vendorplugin.h, + getAllJavaInfos). It also uses a list of paths, which have been registered + by <code>jfw_addJRELocation</code>. + It is checked if the path still contains a valid JRE and if so the respective + <code>JavaInfo</code> object will be appended to the array unless there is + already an equal object.</p> + + @param parInfo + [out] on returns it contains a vector of <code>JavaInfo</code> pointers. + + @return + JFW_E_NONE function ran successfully.<br/> + JFW_E_ERROR an error occurred. <br/> + JFW_E_CONFIGURATION mode was not properly set or their prerequisites + were not met. +*/ +JVMFWK_DLLPUBLIC javaFrameworkError +jfw_findAllJREs(std::vector<std::unique_ptr<JavaInfo>>* parInfo); + +/** determines if a path points to a Java installation. + + <p>If the path belongs to a JRE installation then it returns the + respective <code>JavaInfo</code> object. The function uses the + <code>getJavaInfoByPath</code> function of the plug-ins to obtain the + <code>JavaInfo</code> object. Only if the JRE found at the specified location + meets the version requirements as specified in the javavendors.xml file a + <code>JavaInfo</code> object is returned.<br/> + <p> + The functions only checks if a JRE exists but does not modify any settings. + To make the found JRE the "selected JRE" one has + to call <code>jfw_setSelectedJRE</code>.</p> + + @param pPath + [in] a file URL to a directory. + @param ppInfo + [out] the <code>JavaInfo</code> object which represents a JRE found at the + location specified by <code>pPath</code> + + @return + JFW_E_NONE function ran successfully.<br/> + JFW_E_ERROR an error occurred. <br/> + JFW_E_CONFIGURATION mode was not properly set or their prerequisites + were not met.</br> + JFW_E_NOT_RECOGNIZED neither plug-in library could detect a JRE. <br/> + JFW_E_FAILED_VERSION a JRE was detected but if failed the version + requirements as determined by the javavendors.xml + */ +JVMFWK_DLLPUBLIC javaFrameworkError jfw_getJavaInfoByPath(OUString const& pPath, + std::unique_ptr<JavaInfo>* ppInfo); + +/** starts a Java Virtual Machine (JVM). + + <p>The function uses the current settings to start a JVM. The actual + start-up code, however, is provided by the plug-in libraries. The setting + of the "selected Java" contains the information as to what vendor + the respective JRE comes from. In the javavendors.xml there is a mapping of + vendor names to the respective plug-in libraries.</p> + <p> + The function ultimately calls <code>startJavaVirtualMachine</code> from + the plug-in library.</p> + <p> + The <code>arOptions</code> + argument contains start arguments which are passed in JavaVMOption structures + to the VM during its creation. These + could be things, such as language settings, proxy settings or any other + properties which shall be obtainable by + <code>java.lang.System.getProperties</code>. One can also pass options which + have a certain meaning to the runtime behaviour such as -ea or -X... However, + one must be sure that these options can be interpreted by the VM.<br/> + The class path cannot be set this way. The class path is internally composed by + the paths to archives in a certain directory, which is preconfigured in + the internal data store and the respective user setting (see + <code>jfw_setUserClassPath</code>.</p> + <p> + If a JRE was selected at runtime which was different from the previous + setting and that JRE needs a prepared environment, for example an adapted + <code>LD_LIBRARY_PATH</code> environment variable, then the VM will not be + created and JFW_E_NEED_RESTART error is returned. If a VM is already running + then a JFW_E_RUNNING_JVM is returned.</p> + + @param pInfo + [in] optional pointer to a specific JRE; must be caller-freed if not NULL + @param arOptions + [in] the vector containing additional start arguments. + @param ppVM + [out] the <code>JavaVM</code> pointer. + @param ppEnv + [out] the <code>JNIenv</code> pointer. + + @return + JFW_E_NONE function ran successfully.<br/> + JFW_E_ERROR an error occurred. <br/> + JFW_E_CONFIGURATION mode was not properly set or their prerequisites + were not met.</br> + JFW_E_JAVA_DISABLED the use of Java is currently disabled. <br/> + JFW_E_NO_SELECT there is no JRE selected yet. <br/> + JFW_E_RUNNING_JVM there is already a VM running.<br/> + JFW_E_INVALID_SETTINGS the javavendors.xml has been changed and no + JRE has been selected afterwards. <br/> + JFW_E_NEED_RESTART in the current process a different JRE has been selected + which needs a prepared environment, which has to be done before the office + process. Therefore the new JRE may not be used until the office was restarted.<br/> + JFW_E_NEED_RESTART is also returned when Java was disabled at the beginning and + then the user enabled it. If then the selected JRE has the requirement + JFW_REQUIRE_NEEDRESTART then this error is returned. </br> + JFW_E_VM_CREATION_FAILED the creation of the JVM failed. The creation is performed + by a plug-in library and not by this API. + JFW_E_FAILED_VERSION the "Default Mode" is active. The JRE determined by + <code>JAVA_HOME</code>does not meet the version requirements. + */ +JVMFWK_DLLPUBLIC javaFrameworkError jfw_startVM(JavaInfo const* pInfo, + std::vector<OUString> const& arOptions, + JavaVM** ppVM, JNIEnv** ppEnv); + +/** determines the JRE that is to be used. + + <p>When calling <code>jfw_startVM</code> then a VM is started from + the JRE that is determined by this function.<br/> + It is not verified if the JRE represented by the <code>JavaInfo</code> + argument meets the requirements as specified by the javavendors.xml file. + However, usually one obtains the <code>JavaInfo</code> object from the + functions <code>jfw_findAllJREs</code> or <code>jfw_getJavaInfoByPath</code>, + which do verify the JREs and pass out only <code>JavaInfo</code> objects + which comply with the version requirements.</p> + <p> + If <code>pInfo</code> is NULL then the meaning is that no JRE will be + selected. <code>jfw_startVM</code> will then return + <code>JFW_E_NO_SELECT</code>.</p> + + @param pInfo + [in] pointer to <code>JavaInfo</code> structure, containing data about a + JRE. The caller must still free <code>pInfo</code>. + + @return + JFW_E_NONE function ran successfully.<br/> + JFW_E_ERROR An error occurred.<br/> + JFW_E_CONFIGURATION mode was not properly set or their prerequisites + were not met.<br/> + JFW_E_DIRECT_MODE the function cannot be used in this mode. + */ +JVMFWK_DLLPUBLIC javaFrameworkError jfw_setSelectedJRE(JavaInfo const* pInfo); + +/** provides information about the JRE that is to be used. + + <p>If no JRE is currently selected then <code>ppInfo</code> will contain + NULL on return.</br> + If the value of the element <updated> in the javavendors.xml file was + changed since the time when the last Java was selected then this + function returns <code>JFW_E_INVALID_SETTINGS</code>. This could happen during + a product patch. Then new version requirements may be introduced, so that + the currently selected JRE may not meet these requirements anymore. + </p> + <p>In direct mode the function returns information about a JRE that was + set by the bootstrap parameter UNO_JAVA_JFW_JREHOME. + </p> + @param ppInfo + [out] on return it contains a pointer to a <code>JavaInfo</code> object + that represents the currently selected JRE. When <code>*ppInfo</code> is not + NULL then the function sets the pointer. + + @return + JFW_E_NONE function ran successfully.<br/> + JFW_E_CONFIGURATION mode was not properly set or their prerequisites + were not met.<br/> + JFW_E_INVALID_SETTINGS the javavendors.xml has been changed and no + JRE has been selected afterwards. <br/> + */ +JVMFWK_DLLPUBLIC javaFrameworkError jfw_getSelectedJRE(std::unique_ptr<JavaInfo>* ppInfo); + +/** determines if Java can be used. + + <p>If <code>bEnabled</code> is <code>false</code> then a call + to jfw_startVM will result in an error with the errorcode + <code>JFW_E_JAVA_DISABLED</code></p> + + @param bEnabled + [in] use of Java enabled/disabled. + + @return + JFW_E_NONE function ran successfully.<br/> + JFW_E_ERROR An error occurred.<br/> + JFW_E_CONFIGURATION mode was not properly set or their prerequisites + were not met.<br/> + JFW_E_DIRECT_MODE the function cannot be used in this mode. + */ +JVMFWK_DLLPUBLIC javaFrameworkError jfw_setEnabled(bool bEnabled); + +/** provides the information if Java can be used. + + <p>That is if the user enabled or disabled the use of Java. + </p> + + @return + JFW_E_NONE function ran successfully.<br/> + JFW_E_ERROR An error occurred.<br/> + JFW_E_CONFIGURATION mode was not properly set or their prerequisites + were not met.<br/> + JFW_E_DIRECT_MODE the function cannot be used in this mode. + */ +JVMFWK_DLLPUBLIC javaFrameworkError jfw_getEnabled(bool* pbEnabled); + +/** determines parameters which are passed to VM during its creation. + + <p>The strings must be exactly as they are passed on the command line. + For example, one could pass<br/> + -Xdebug <br/> + -Xrunjdw:transport=dt_socket,server=y,address=8000<br/> + in order to enable debugging support. + </p> + + @param arParameters + [in] contains the arguments. + + @return + JFW_E_NONE function ran successfully.<br/> + JFW_E_ERROR An error occurred.<br/> + JFW_E_CONFIGURATION mode was not properly set or their prerequisites + were not met.<br/> + JFW_E_DIRECT_MODE the function cannot be used in this mode. + */ +JVMFWK_DLLPUBLIC javaFrameworkError jfw_setVMParameters(std::vector<OUString> const& arArgs); + +/** obtains the currently used start parameters. + + @param parParameters + [out] on returns contains a pointer to the array of the start arguments. + + @return + JFW_E_NONE function ran successfully.<br/> + JFW_E_ERROR An error occurred.<br/> + JFW_E_CONFIGURATION mode was not properly set or their prerequisites + were not met.<br/> + JFW_E_DIRECT_MODE the function cannot be used in this mode. + */ +JVMFWK_DLLPUBLIC javaFrameworkError jfw_getVMParameters(std::vector<OUString>* parParameters); + +/** sets the user class path. + + <p>When the VM is started then it is passed the class path. The + class path also contains the user class path set by this function. + The paths contained in <code>pCP</code> must be separated with a + system dependent path separator.</p> + + @param pCP + [in] the user class path. + + @return + JFW_E_NONE function ran successfully.<br/> + JFW_E_ERROR An error occurred.<br/> + JFW_E_CONFIGURATION mode was not properly set or their prerequisites + were not met.<br/> + JFW_E_DIRECT_MODE the function cannot be used in this mode. + */ +JVMFWK_DLLPUBLIC javaFrameworkError jfw_setUserClassPath(OUString const& pCP); +/** provides the value of the current user class path. + + <p>The function returns an empty string if no user class path is set. + </p> + + @param ppCP + [out] contains the user class path on return. + + @return + JFW_E_NONE function ran successfully.<br/> + JFW_E_ERROR An error occurred.<br/> + JFW_E_CONFIGURATION mode was not properly set or their prerequisites + were not met.<br/> + JFW_E_DIRECT_MODE the function cannot be used in this mode. + */ +JVMFWK_DLLPUBLIC javaFrameworkError jfw_getUserClassPath(OUString* ppCP); + +/** saves the location of a JRE. + + <p>When <code>jfw_findAllJREs</code> is called then the paths added by this + function are evaluated. If the location still represents a + JRE then a <code>JavaInfo</code> object is created which is returned along + with all other <code>JavaInfo</code> objects by + <code>jfw_findAllJREs</code>. If the location + cannot be recognized then the location string is ignored. </p> + <p> + A validation if <code>sLocation</code> points to a JRE is not + performed. To do that one has to use <code>jfw_getJavaInfoByPath</code>. + </p> + <p> + Adding a path that is already stored causes no error.</p> + + @param sLocation + [in] file URL to a directory which contains a JRE. + + @return + JFW_E_NONE function ran successfully.<br/> + JFW_E_ERROR An error occurred.<br/> + JFW_E_CONFIGURATION mode was not properly set or their prerequisites + were not met.<br/> + JFW_E_DIRECT_MODE the function cannot be used in this mode. + */ +JVMFWK_DLLPUBLIC javaFrameworkError jfw_addJRELocation(OUString const& sLocation); + +/** checks if the installation of the jre still exists. + + This function checks if the JRE described by pInfo still + exists. The check must be very quick because it is called by javaldx + (Linux, Solaris) at start up. + + @param pInfo + [in] the JavaInfo object with information about the JRE. + @param pp_exist + [out] the parameter is set to either true or false. The value is + only valid if the function returns JFW_E_NONE. + + @return + JFW_E_NONE the function ran successfully.</br> + JFW_E_ERROR an error occurred during execution.</br> + */ +JVMFWK_DLLPUBLIC javaFrameworkError jfw_existJRE(const JavaInfo* pInfo, bool* exist); + +/** locks this API so that it cannot be used by other threads. + + <p>If a different thread called this function before then the + current call is blocked until the other thread has called + <code>jfw_unlock()</code>. The function should be called if one + needs an exact snapshot of the current settings. Then the settings + are retrieved one by one without risk that the settings may be changed + by a different thread. Similarity if one needs to make settings which + should become effective at the same time then <code>jfw_lock</code> + should be called. That is, <code>jfw_startVM</code> which uses the + settings cannot be called before all settings have be made.</p> + <p> + The only functions which is not effected by <code>jfw_lock</code> is + <code>jfw_areEqualJavaInfo</code>. + */ +JVMFWK_DLLPUBLIC void jfw_lock(); + +/** unlocks this API. + + <p>This function is called after <code>jfw_lock</code>. It allows other + threads to use this API concurrently.</p> +*/ +JVMFWK_DLLPUBLIC void jfw_unlock(); + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |