diff options
author | andrew <devnull@localhost> | 2010-10-19 17:55:59 +0100 |
---|---|---|
committer | andrew <devnull@localhost> | 2010-10-19 17:55:59 +0100 |
commit | 7603e948d7a0a7eb2e72358cb4a40ae6779f95da (patch) | |
tree | c6441f7d14eafe8119d890cddd09b05b8f88c52a /netx/net/sourceforge/jnlp/services/SingleInstanceLock.java |
Initial import from IcedTea6.
2010-10-19 Andrew John Hughes <[email protected]>
* .hgignore,
* Makefile.am,
* acinclude.m4,
* autogen.sh,
* configure.ac,
* extra/net/sourceforge/jnlp/about/HTMLPanel.java,
* extra/net/sourceforge/jnlp/about/Main.java,
* extra/net/sourceforge/jnlp/about/resources/about.html,
* extra/net/sourceforge/jnlp/about/resources/applications.html,
* extra/net/sourceforge/jnlp/about/resources/notes.html,
* javac.in,
* javaws.desktop: Imported from IcedTea6.
* launcher/java.c,
* launcher/java.h,
* launcher/java_md.c,
* launcher/java_md.h,
* launcher/jli_util.h,
* launcher/jni.h,
* launcher/jvm.h,
* launcher/jvm_md.h,
* launcher/manifest_info.h,
* launcher/splashscreen.h,
* launcher/splashscreen_stubs.c,
* launcher/version_comp.h,
* launcher/wildcard.h: Imported from OpenJDK.
* netx/javaws.1,
* netx/javax/jnlp/BasicService.java,
* netx/javax/jnlp/ClipboardService.java,
* netx/javax/jnlp/DownloadService.java,
* netx/javax/jnlp/DownloadServiceListener.java,
* netx/javax/jnlp/ExtendedService.java,
* netx/javax/jnlp/ExtensionInstallerService.java,
* netx/javax/jnlp/FileContents.java,
* netx/javax/jnlp/FileOpenService.java,
* netx/javax/jnlp/FileSaveService.java,
* netx/javax/jnlp/JNLPRandomAccessFile.java,
* netx/javax/jnlp/PersistenceService.java,
* netx/javax/jnlp/PrintService.java,
* netx/javax/jnlp/ServiceManager.java,
* netx/javax/jnlp/ServiceManagerStub.java,
* netx/javax/jnlp/SingleInstanceListener.java,
* netx/javax/jnlp/SingleInstanceService.java,
* netx/javax/jnlp/UnavailableServiceException.java,
* netx/net/sourceforge/jnlp/AppletDesc.java,
* netx/net/sourceforge/jnlp/ApplicationDesc.java,
* netx/net/sourceforge/jnlp/AssociationDesc.java,
* netx/net/sourceforge/jnlp/ComponentDesc.java,
* netx/net/sourceforge/jnlp/DefaultLaunchHandler.java,
* netx/net/sourceforge/jnlp/ExtensionDesc.java,
* netx/net/sourceforge/jnlp/IconDesc.java,
* netx/net/sourceforge/jnlp/InformationDesc.java,
* netx/net/sourceforge/jnlp/InstallerDesc.java,
* netx/net/sourceforge/jnlp/JARDesc.java,
* netx/net/sourceforge/jnlp/JNLPFile.java,
* netx/net/sourceforge/jnlp/JNLPSplashScreen.java,
* netx/net/sourceforge/jnlp/JREDesc.java,
* netx/net/sourceforge/jnlp/LaunchException.java,
* netx/net/sourceforge/jnlp/LaunchHandler.java,
* netx/net/sourceforge/jnlp/Launcher.java,
* netx/net/sourceforge/jnlp/MenuDesc.java,
* netx/net/sourceforge/jnlp/NetxPanel.java,
* netx/net/sourceforge/jnlp/Node.java,
* netx/net/sourceforge/jnlp/PackageDesc.java,
* netx/net/sourceforge/jnlp/ParseException.java,
* netx/net/sourceforge/jnlp/Parser.java,
* netx/net/sourceforge/jnlp/PluginBridge.java,
* netx/net/sourceforge/jnlp/PropertyDesc.java,
* netx/net/sourceforge/jnlp/RelatedContentDesc.java,
* netx/net/sourceforge/jnlp/ResourcesDesc.java,
* netx/net/sourceforge/jnlp/SecurityDesc.java,
* netx/net/sourceforge/jnlp/ShortcutDesc.java,
* netx/net/sourceforge/jnlp/StreamEater.java,
* netx/net/sourceforge/jnlp/UpdateDesc.java,
* netx/net/sourceforge/jnlp/Version.java,
* netx/net/sourceforge/jnlp/cache/CacheEntry.java,
* netx/net/sourceforge/jnlp/cache/CacheUtil.java,
* netx/net/sourceforge/jnlp/cache/DefaultDownloadIndicator.java,
* netx/net/sourceforge/jnlp/cache/DownloadIndicator.java,
* netx/net/sourceforge/jnlp/cache/Resource.java,
* netx/net/sourceforge/jnlp/cache/ResourceTracker.java,
* netx/net/sourceforge/jnlp/cache/UpdatePolicy.java,
* netx/net/sourceforge/jnlp/cache/package.html,
* netx/net/sourceforge/jnlp/event/ApplicationEvent.java,
* netx/net/sourceforge/jnlp/event/ApplicationListener.java,
* netx/net/sourceforge/jnlp/event/DownloadEvent.java,
* netx/net/sourceforge/jnlp/event/DownloadListener.java,
* netx/net/sourceforge/jnlp/event/package.html,
* netx/net/sourceforge/jnlp/package.html,
* netx/net/sourceforge/jnlp/resources/Manifest.mf,
* netx/net/sourceforge/jnlp/resources/Messages.properties,
* netx/net/sourceforge/jnlp/resources/about.jnlp,
* netx/net/sourceforge/jnlp/resources/default.jnlp,
* netx/net/sourceforge/jnlp/runtime/AppThreadGroup.java,
* netx/net/sourceforge/jnlp/runtime/AppletAudioClip.java,
* netx/net/sourceforge/jnlp/runtime/AppletEnvironment.java,
* netx/net/sourceforge/jnlp/runtime/AppletInstance.java,
* netx/net/sourceforge/jnlp/runtime/ApplicationInstance.java,
* netx/net/sourceforge/jnlp/runtime/Boot.java,
* netx/net/sourceforge/jnlp/runtime/Boot13.java,
* netx/net/sourceforge/jnlp/runtime/JNLPClassLoader.java,
* netx/net/sourceforge/jnlp/runtime/JNLPPolicy.java,
* netx/net/sourceforge/jnlp/runtime/JNLPRuntime.java,
* netx/net/sourceforge/jnlp/runtime/JNLPSecurityManager.java,
* netx/net/sourceforge/jnlp/runtime/package.html,
* netx/net/sourceforge/jnlp/security/AccessWarningPane.java,
* netx/net/sourceforge/jnlp/security/AppletWarningPane.java,
* netx/net/sourceforge/jnlp/security/CertVerifier.java,
* netx/net/sourceforge/jnlp/security/CertWarningPane.java,
* netx/net/sourceforge/jnlp/security/CertsInfoPane.java,
* netx/net/sourceforge/jnlp/security/HttpsCertVerifier.java,
* netx/net/sourceforge/jnlp/security/MoreInfoPane.java,
* netx/net/sourceforge/jnlp/security/NotAllSignedWarningPane.java,
* netx/net/sourceforge/jnlp/security/SecurityDialogPanel.java,
* netx/net/sourceforge/jnlp/security/SecurityUtil.java,
* netx/net/sourceforge/jnlp/security/SecurityWarningDialog.java,
* netx/net/sourceforge/jnlp/security/SingleCertInfoPane.java,
* netx/net/sourceforge/jnlp/security/VariableX509TrustManager.java,
* netx/net/sourceforge/jnlp/security/viewer/CertificatePane.java,
* netx/net/sourceforge/jnlp/security/viewer/CertificateViewer.java,
* netx/net/sourceforge/jnlp/services/ExtendedSingleInstanceService.java,
* netx/net/sourceforge/jnlp/services/InstanceExistsException.java,
* netx/net/sourceforge/jnlp/services/ServiceUtil.java,
* netx/net/sourceforge/jnlp/services/SingleInstanceLock.java,
* netx/net/sourceforge/jnlp/services/XBasicService.java,
* netx/net/sourceforge/jnlp/services/XClipboardService.java,
* netx/net/sourceforge/jnlp/services/XDownloadService.java,
* netx/net/sourceforge/jnlp/services/XExtendedService.java,
* netx/net/sourceforge/jnlp/services/XExtensionInstallerService.java,
* netx/net/sourceforge/jnlp/services/XFileContents.java,
* netx/net/sourceforge/jnlp/services/XFileOpenService.java,
* netx/net/sourceforge/jnlp/services/XFileSaveService.java,
* netx/net/sourceforge/jnlp/services/XJNLPRandomAccessFile.java,
* netx/net/sourceforge/jnlp/services/XPersistenceService.java,
* netx/net/sourceforge/jnlp/services/XPrintService.java,
* netx/net/sourceforge/jnlp/services/XServiceManagerStub.java,
* netx/net/sourceforge/jnlp/services/XSingleInstanceService.java,
* netx/net/sourceforge/jnlp/services/package.html,
* netx/net/sourceforge/jnlp/tools/CharacterEncoder.java,
* netx/net/sourceforge/jnlp/tools/HexDumpEncoder.java,
* netx/net/sourceforge/jnlp/tools/JarRunner.java,
* netx/net/sourceforge/jnlp/tools/JarSigner.java,
* netx/net/sourceforge/jnlp/tools/JarSignerResources.java,
* netx/net/sourceforge/jnlp/tools/KeyStoreUtil.java,
* netx/net/sourceforge/jnlp/tools/KeyTool.java,
* netx/net/sourceforge/jnlp/util/FileUtils.java,
* netx/net/sourceforge/jnlp/util/PropertiesFile.java,
* netx/net/sourceforge/jnlp/util/Reflect.java,
* netx/net/sourceforge/jnlp/util/WeakList.java,
* netx/net/sourceforge/jnlp/util/XDesktopEntry.java,
* netx/net/sourceforge/nanoxml/XMLElement.java,
* netx/net/sourceforge/nanoxml/XMLParseException.java,
* plugin/icedteanp/IcedTeaJavaRequestProcessor.cc,
* plugin/icedteanp/IcedTeaJavaRequestProcessor.h,
* plugin/icedteanp/IcedTeaNPPlugin.cc,
* plugin/icedteanp/IcedTeaNPPlugin.h,
* plugin/icedteanp/IcedTeaPluginRequestProcessor.cc,
* plugin/icedteanp/IcedTeaPluginRequestProcessor.h,
* plugin/icedteanp/IcedTeaPluginUtils.cc,
* plugin/icedteanp/IcedTeaPluginUtils.h,
* plugin/icedteanp/IcedTeaRunnable.cc,
* plugin/icedteanp/IcedTeaRunnable.h,
* plugin/icedteanp/IcedTeaScriptablePluginObject.cc,
* plugin/icedteanp/IcedTeaScriptablePluginObject.h,
* plugin/icedteanp/java/netscape/javascript/JSException.java,
* plugin/icedteanp/java/netscape/javascript/JSObject.java,
* plugin/icedteanp/java/netscape/javascript/JSObjectCreatePermission.java,
* plugin/icedteanp/java/netscape/javascript/JSProxy.java,
* plugin/icedteanp/java/netscape/javascript/JSRunnable.java,
* plugin/icedteanp/java/netscape/javascript/JSUtil.java,
* plugin/icedteanp/java/netscape/security/ForbiddenTargetException.java,
* plugin/icedteanp/java/sun/applet/AppletSecurityContextManager.java,
* plugin/icedteanp/java/sun/applet/GetMemberPluginCallRequest.java,
* plugin/icedteanp/java/sun/applet/GetWindowPluginCallRequest.java,
* plugin/icedteanp/java/sun/applet/JavaConsole.java,
* plugin/icedteanp/java/sun/applet/MethodOverloadResolver.java,
* plugin/icedteanp/java/sun/applet/PasswordAuthenticationDialog.java,
* plugin/icedteanp/java/sun/applet/PluginAppletSecurityContext.java,
* plugin/icedteanp/java/sun/applet/PluginAppletViewer.java,
* plugin/icedteanp/java/sun/applet/PluginCallRequest.java,
* plugin/icedteanp/java/sun/applet/PluginCallRequestFactory.java,
* plugin/icedteanp/java/sun/applet/PluginClassLoader.java,
* plugin/icedteanp/java/sun/applet/PluginCookieInfoRequest.java,
* plugin/icedteanp/java/sun/applet/PluginCookieManager.java,
* plugin/icedteanp/java/sun/applet/PluginDebug.java,
* plugin/icedteanp/java/sun/applet/PluginException.java,
* plugin/icedteanp/java/sun/applet/PluginMain.java,
* plugin/icedteanp/java/sun/applet/PluginMessageConsumer.java,
* plugin/icedteanp/java/sun/applet/PluginMessageHandlerWorker.java,
* plugin/icedteanp/java/sun/applet/PluginObjectStore.java,
* plugin/icedteanp/java/sun/applet/PluginProxyInfoRequest.java,
* plugin/icedteanp/java/sun/applet/PluginProxySelector.java,
* plugin/icedteanp/java/sun/applet/PluginStreamHandler.java,
* plugin/icedteanp/java/sun/applet/RequestQueue.java,
* plugin/icedteanp/java/sun/applet/TestEnv.java,
* plugin/icedteanp/java/sun/applet/VoidPluginCallRequest.java,
* plugin/tests/LiveConnect/DummyObject.java,
* plugin/tests/LiveConnect/OverloadTestHelper1.java,
* plugin/tests/LiveConnect/OverloadTestHelper2.java,
* plugin/tests/LiveConnect/OverloadTestHelper3.java,
* plugin/tests/LiveConnect/PluginTest.java,
* plugin/tests/LiveConnect/build,
* plugin/tests/LiveConnect/common.js,
* plugin/tests/LiveConnect/index.html,
* plugin/tests/LiveConnect/jjs_eval_test.js,
* plugin/tests/LiveConnect/jjs_func_parameters_tests.js,
* plugin/tests/LiveConnect/jjs_func_rettype_tests.js,
* plugin/tests/LiveConnect/jjs_get_tests.js,
* plugin/tests/LiveConnect/jjs_set_tests.js,
* plugin/tests/LiveConnect/jsj_func_overload_tests.js,
* plugin/tests/LiveConnect/jsj_func_parameters_tests.js,
* plugin/tests/LiveConnect/jsj_func_rettype_tests.js,
* plugin/tests/LiveConnect/jsj_get_tests.js,
* plugin/tests/LiveConnect/jsj_set_tests.js,
* plugin/tests/LiveConnect/jsj_type_casting_tests.js,
* plugin/tests/LiveConnect/jsj_type_conversion_tests.js:
Initial import from IcedTea6.
* AUTHORS,
* COPYING
* INSTALL,
* NEWS,
* README: New documentation.
Diffstat (limited to 'netx/net/sourceforge/jnlp/services/SingleInstanceLock.java')
-rw-r--r-- | netx/net/sourceforge/jnlp/services/SingleInstanceLock.java | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/netx/net/sourceforge/jnlp/services/SingleInstanceLock.java b/netx/net/sourceforge/jnlp/services/SingleInstanceLock.java new file mode 100644 index 0000000..5108642 --- /dev/null +++ b/netx/net/sourceforge/jnlp/services/SingleInstanceLock.java @@ -0,0 +1,194 @@ +// Copyright (C) 2009 Red Hat, Inc. +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +package net.sourceforge.jnlp.services; + +import java.io.BufferedReader; +import java.io.BufferedWriter; +import java.io.File; +import java.io.FileReader; +import java.io.FileWriter; +import java.io.IOException; +import java.net.BindException; +import java.net.ServerSocket; + +import net.sourceforge.jnlp.JNLPFile; +import net.sourceforge.jnlp.runtime.JNLPRuntime; +import net.sourceforge.jnlp.util.FileUtils; + +/** + * This class represents a Lock for single instance jnlp applications + * + * The lock is per-session, per user. + * + * @author <a href="mailto:[email protected]">Omair Majid</a> + */ +class SingleInstanceLock { + + JNLPFile jnlpFile; + File lockFile = null; + + public static final int INVALID_PORT = Integer.MIN_VALUE; + + int port = INVALID_PORT; + + /** + * Create an object to manage the instance lock for the specified JNLP file. + * + * @param jnlpFile the jnlpfile to create the lock for + */ + public SingleInstanceLock(JNLPFile jnlpFile) { + this.jnlpFile = jnlpFile; + lockFile = getLockFile(); + + } + + /** + * Create/overwrite the instance lock for the jnlp file. + * + * @param localPort the network port for the lock + * @throws IOException on any io problems + */ + public void createWithPort(int localPort) throws IOException { + + BufferedWriter lockFileWriter = new BufferedWriter(new FileWriter(lockFile, false)); + lockFileWriter.write(String.valueOf(localPort)); + lockFileWriter.newLine(); + lockFileWriter.flush(); + lockFileWriter.close(); + + } + + /** + * Returns true if the lock if valid. That is, the lock exists, and port it + * points to is listening for incoming messages. + */ + public boolean isValid() { + return (exists() && getPort() != INVALID_PORT && !isPortFree(getPort())); + } + + /** + * Returns the port in this lock file. + */ + public int getPort() { + if (!exists()) { + return INVALID_PORT; + } + + try { + parseFile(); + } catch (NumberFormatException e) { + port = INVALID_PORT; + } catch (IOException e) { + port = INVALID_PORT; + } + return port; + + } + + /** + * Returns true if the lock file already exists. + */ + private boolean exists() { + return lockFile.exists(); + } + + /** + * Returns true if the port is free. + */ + private boolean isPortFree(int port) { + try { + ServerSocket socket = new ServerSocket(port); + socket.close(); + return true; + } catch (BindException e) { + return false; + } catch (IOException e) { + throw new RuntimeException(e); + } + } + + /** + * Return a file object that represents the lock file. The lock file itself + * may or may not exist. + */ + private File getLockFile() { + File baseDir = new File(JNLPRuntime.LOCKS_DIR); + + if (!baseDir.isDirectory() && !baseDir.mkdirs()) { + throw new RuntimeException(R("RNoLockDir", baseDir)); + } + String lockFileName = getLockFileName(); + File applicationLockFile = new File(baseDir, lockFileName); + return applicationLockFile; + } + + /** + * Returns the name of the lock file. + */ + private String getLockFileName() { + String initialName = ""; + + if (jnlpFile.getSourceLocation() != null) { + initialName = initialName + jnlpFile.getSourceLocation(); + } else { + initialName = initialName + jnlpFile.getFileLocation(); + } + + if (jnlpFile.getFileVersion() != null) { + initialName = initialName + jnlpFile.getFileVersion().toString(); + } + + initialName = initialName + getCurrentDisplay(); + return FileUtils.sanitizeFileName(initialName); + + } + + /** + * Parse the lock file. + * + * @throws NumberFormatException + * @throws IOException + */ + private void parseFile() throws NumberFormatException, IOException { + BufferedReader lockFileReader = new BufferedReader(new FileReader(lockFile)); + int port = Integer.valueOf(lockFileReader.readLine()); + lockFileReader.close(); + this.port = port; + } + + /** + * Returns a string identifying this display. + * + * Implementation note: On systems with X support, this is the DISPLAY + * variable + * + * @return a string that is guaranteed to be not null. + */ + private String getCurrentDisplay() { + String display = System.getenv("DISPLAY"); + return (display == null) ? "" : display; + } + + private static String R(String key) { + return JNLPRuntime.getMessage(key); + } + + private static String R(String key, Object param) { + return JNLPRuntime.getMessage(key, new Object[] { param }); + } + +} |