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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during
compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based
@AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step.
This library is a superset of AspectJ weaver and hence also of AspectJ runtime.
/*******************************************************************************
* Copyright (c) 2005, 2014 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.core.runtime.internal.adaptor;
import java.lang.reflect.Method;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import org.eclipse.core.runtime.adaptor.EclipseStarter;
import org.eclipse.osgi.framework.log.FrameworkLog;
import org.eclipse.osgi.framework.log.FrameworkLogEntry;
import org.eclipse.osgi.internal.debug.Debug;
import org.eclipse.osgi.internal.framework.EquinoxConfiguration;
import org.eclipse.osgi.internal.framework.EquinoxContainer;
import org.eclipse.osgi.internal.messages.Msg;
import org.eclipse.osgi.service.runnable.*;
import org.osgi.framework.*;
import org.osgi.framework.launch.Framework;
public class EclipseAppLauncher implements ApplicationLauncher {
volatile private ParameterizedRunnable runnable = null;
private Object appContext = null;
private final java.util.concurrent.Semaphore runningLock = new java.util.concurrent.Semaphore(1);
private final java.util.concurrent.Semaphore waitForAppLock = new java.util.concurrent.Semaphore(0);
private final BundleContext context;
private boolean relaunch = false;
private final boolean failOnNoDefault;
private final FrameworkLog log;
private final EquinoxConfiguration equinoxConfig;
public EclipseAppLauncher(BundleContext context, boolean relaunch, boolean failOnNoDefault, FrameworkLog log, EquinoxConfiguration equinoxConfig) {
this.context = context;
this.relaunch = relaunch;
this.failOnNoDefault = failOnNoDefault;
this.log = log;
this.equinoxConfig = equinoxConfig;
findRunnableService();
}
/*
* Used for backwards compatibility with < 3.2 runtime
*/
private void findRunnableService() {
// look for a ParameterizedRunnable registered as a service by runtimes (3.0, 3.1)
String appClass = ParameterizedRunnable.class.getName();
ServiceReference[] runRefs = null;
try {
runRefs = context.getServiceReferences(ParameterizedRunnable.class.getName(), "(&(objectClass=" + appClass + ")(eclipse.application=*))"); //$NON-NLS-1$//$NON-NLS-2$
} catch (InvalidSyntaxException e) {
// ignore this. It should never happen as we have tested the above format.
}
if (runRefs != null && runRefs.length > 0) {
// found the service use it as the application.
runnable = (ParameterizedRunnable) context.getService(runRefs[0]);
// we will never be able to relaunch with a pre 3.2 runtime
relaunch = false;
waitForAppLock.release();
}
}
/*
* Starts this application launcher on the current thread. This method
* should be called by the main thread to ensure that applications are
* launched in the main thread.
*/
public Object start(Object defaultContext) throws Exception {
// here we assume that launch has been called by runtime before we started
// TODO this may be a bad assumption but it works for now because we register the app launcher as a service and runtime synchronously calls launch on the service
if (failOnNoDefault && runnable == null)
throw new IllegalStateException(Msg.ECLIPSE_STARTUP_ERROR_NO_APPLICATION);
Object result = null;
boolean doRelaunch;
Bundle b = context.getBundle();
do {
try {
if (relaunch) {
// need a thread to kick the main thread when the framework stops
final Thread mainThread = Thread.currentThread();
final BundleContext mainContext = context;
new Thread((Runnable) () -> {
Framework framework = (Framework) mainContext.getBundle(Constants.SYSTEM_BUNDLE_LOCATION);
try {
framework.waitForStop(0);
// framework is done; tell the main thread to stop
mainThread.interrupt();
} catch (InterruptedException e) {
Thread.interrupted();
// just exiting now
}
}, "Framework watcher").start(); //$NON-NLS-1$
}
result = runApplication(defaultContext);
// refresh the allowAppRelaunch setting in case the application changed it
relaunch = Boolean.valueOf(equinoxConfig.getConfiguration(EclipseStarter.PROP_ALLOW_APPRELAUNCH));
} catch (Exception e) {
if (!relaunch || (b.getState() & Bundle.ACTIVE) == 0)
throw e;
if (log != null)
log.log(new FrameworkLogEntry(EquinoxContainer.NAME, FrameworkLogEntry.ERROR, 0, Msg.ECLIPSE_STARTUP_APP_ERROR, 1, e, null));
}
doRelaunch = (relaunch && (b.getState() & Bundle.ACTIVE) != 0);
} while (doRelaunch);
return result;
}
/*
* Waits for an application to be launched and the runs the application on the
* current thread (main).
*/
private Object runApplication(Object defaultContext) throws Exception {
try {
// wait for an application to be launched.
waitForAppLock.acquire();
// an application is ready; acquire the running lock.
// this must happen after we have acquired an application (by acquiring waitForAppLock above).
runningLock.acquire();
if (EclipseStarter.debug) {
String timeString = equinoxConfig.getConfiguration("eclipse.startTime"); //$NON-NLS-1$
long time = timeString == null ? 0L : Long.parseLong(timeString);
Debug.println("Starting application: " + (System.currentTimeMillis() - time)); //$NON-NLS-1$
}
try {
// run the actual application on the current thread (main).
return runnable.run(appContext != null ? appContext : defaultContext);
} finally {
// free the runnable application and release the lock to allow another app to be launched.
runnable = null;
appContext = null;
runningLock.release();
}
} catch (InterruptedException e) {
// ignore; but mark interrupted for others
Thread.interrupted();
}
return null;
}
@Override
public void launch(ParameterizedRunnable app, Object applicationContext) {
waitForAppLock.tryAcquire(); // clear out any pending apps notifications
if (!runningLock.tryAcquire()) // check to see if an application is currently running
throw new IllegalStateException("An application is aready running."); //$NON-NLS-1$
this.runnable = app;
this.appContext = applicationContext;
waitForAppLock.release(); // notify the main thread to launch an application.
runningLock.release(); // release the running lock
}
@Override
public void shutdown() {
// this method will aquire and keep the runningLock to prevent
// all future application launches.
if (runningLock.tryAcquire())
return; // no application is currently running.
ParameterizedRunnable currentRunnable = runnable;
if (currentRunnable instanceof ApplicationRunnable) {
((ApplicationRunnable) currentRunnable).stop();
try {
runningLock.tryAcquire(1, TimeUnit.MINUTES); // timeout after 1 minute.
} catch (InterruptedException e) {
// ignore
Thread.interrupted();
}
}
}
/*
* Similar to the start method this method will restart the default method on current thread.
* This method assumes that the default application was launched at least once and that an ApplicationDescriptor
* exists that can be used to relaunch the default application.
*/
public Object reStart(Object argument) throws Exception {
ServiceReference ref[] = null;
ref = context.getServiceReferences("org.osgi.service.application.ApplicationDescriptor", "(eclipse.application.default=true)"); //$NON-NLS-1$//$NON-NLS-2$
if (ref != null && ref.length > 0) {
Object defaultApp = context.getService(ref[0]);
Method launch = defaultApp.getClass().getMethod("launch", new Class[] {Map.class}); //$NON-NLS-1$
launch.invoke(defaultApp, new Object[] {null});
return start(argument);
}
throw new IllegalStateException(Msg.ECLIPSE_STARTUP_ERROR_NO_APPLICATION);
}
}