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/*******************************************************************************
* Copyright (c) 2013 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.osgi.storage;
import java.io.File;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
import java.security.*;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.osgi.container.*;
import org.eclipse.osgi.container.namespaces.EquinoxModuleDataNamespace;
import org.eclipse.osgi.framework.log.FrameworkLogEntry;
import org.eclipse.osgi.internal.framework.EquinoxConfiguration;
import org.eclipse.osgi.internal.framework.EquinoxContainer;
import org.eclipse.osgi.internal.hookregistry.ActivatorHookFactory;
import org.eclipse.osgi.internal.hookregistry.HookRegistry;
import org.eclipse.osgi.storage.BundleInfo.Generation;
import org.osgi.framework.*;
import org.osgi.framework.namespace.HostNamespace;
import org.osgi.framework.wiring.BundleWiring;
import org.osgi.resource.Capability;
public class FrameworkExtensionInstaller {
private static final ClassLoader CL = FrameworkExtensionInstaller.class.getClassLoader();
private static final Method ADD_FWK_URL_METHOD = findAddURLMethod(CL, "addURL"); //$NON-NLS-1$
private final List<BundleActivator> hookActivators = new ArrayList<BundleActivator>();
private static Method findAddURLMethod(ClassLoader cl, String name) {
if (cl == null)
return null;
return findMethod(cl.getClass(), name, new Class[] {URL.class});
}
// recursively searches a class and it's superclasses for a (potentially inaccessable) method
private static Method findMethod(Class<?> clazz, String name, Class<?>[] args) {
if (clazz == null)
return null; // ends the recursion when getSuperClass returns null
try {
Method result = clazz.getDeclaredMethod(name, args);
result.setAccessible(true);
return result;
} catch (NoSuchMethodException e) {
// do nothing look in super class below
} catch (SecurityException e) {
// if we do not have the permissions then we will not find the method
}
return findMethod(clazz.getSuperclass(), name, args);
}
private static void callAddURLMethod(URL arg) throws InvocationTargetException {
try {
ADD_FWK_URL_METHOD.invoke(CL, new Object[] {arg});
} catch (Throwable t) {
throw new InvocationTargetException(t);
}
}
private final EquinoxConfiguration configuration;
public FrameworkExtensionInstaller(EquinoxConfiguration configuraiton) {
this.configuration = configuraiton;
}
public void addExtensionContent(final ModuleRevision revision, final Module systemModule) throws BundleException {
if (System.getSecurityManager() == null) {
addExtensionContent0(revision, systemModule);
} else {
try {
AccessController.doPrivileged(new PrivilegedExceptionAction<Void>() {
@Override
public Void run() throws BundleException {
addExtensionContent0(revision, systemModule);
return null;
}
});
} catch (PrivilegedActionException e) {
throw (BundleException) e.getCause();
}
}
}
void addExtensionContent0(ModuleRevision revision, Module systemModule) throws BundleException {
if (CL == null || ADD_FWK_URL_METHOD == null) {
return;
}
File[] files = getExtensionFiles(revision);
if (files == null) {
return;
}
for (int i = 0; i < files.length; i++) {
if (files[i] == null)
continue;
try {
callAddURLMethod(StorageUtil.encodeFileURL(files[i]));
} catch (InvocationTargetException e) {
throw new BundleException("Error adding extension content.", e);
} catch (MalformedURLException e) {
throw new BundleException("Error adding extension content.", e);
}
}
try {
// initialize the new urls
CL.loadClass("thisIsNotAClass"); //$NON-NLS-1$
} catch (ClassNotFoundException e) {
// do nothing
}
if (systemModule != null) {
BundleContext systemContext = systemModule.getBundle().getBundleContext();
if (systemContext != null) {
startExtensionActivator(revision, systemContext);
}
}
}
/**
* Returns a list of classpath files for an extension bundle
* @param revision revision for the extension bundle
* @return a list of classpath files for an extension bundle
*/
private File[] getExtensionFiles(ModuleRevision revision) {
List<ModuleCapability> metaDatas = revision.getModuleCapabilities(EquinoxModuleDataNamespace.MODULE_DATA_NAMESPACE);
@SuppressWarnings("unchecked")
List<String> paths = metaDatas.isEmpty() ? null : (List<String>) metaDatas.get(0).getAttributes().get(EquinoxModuleDataNamespace.CAPABILITY_CLASSPATH);
if (paths == null) {
paths = new ArrayList<String>(1);
paths.add("."); //$NON-NLS-1$
}
if (configuration.inDevelopmentMode()) {
String[] devPaths = configuration.getDevClassPath(revision.getSymbolicName());
for (String devPath : devPaths) {
paths.add(devPath);
}
}
List<File> results = new ArrayList<File>(paths.size());
for (String path : paths) {
if (".".equals(path)) { //$NON-NLS-1$
results.add(((Generation) revision.getRevisionInfo()).getBundleFile().getBaseFile());
} else {
File result = ((Generation) revision.getRevisionInfo()).getBundleFile().getFile(path, false);
if (result != null)
results.add(result);
}
}
return results.toArray(new File[results.size()]);
}
public void startExtensionActivators(BundleContext context) {
// First start the hook registry activators
// TODO not sure we really need these anymore
HookRegistry hookRegistry = configuration.getHookRegistry();
List<ActivatorHookFactory> activatorHookFactories = hookRegistry.getActivatorHookFactories();
for (ActivatorHookFactory activatorFactory : activatorHookFactories) {
BundleActivator activator = activatorFactory.createActivator();
startActivator(activator, context);
}
// start the extension bundle activators. In Equinox we let
// framework extensions define Bundle-Activator headers.
ModuleWiring systemWiring = (ModuleWiring) context.getBundle().adapt(BundleWiring.class);
if (systemWiring != null) {
List<ModuleWire> extensionWires = systemWiring.getProvidedModuleWires(HostNamespace.HOST_NAMESPACE);
for (ModuleWire extensionWire : extensionWires) {
ModuleRevision extensionRevision = extensionWire.getRequirer();
startExtensionActivator(extensionRevision, context);
}
}
}
public void stopExtensionActivators(BundleContext context) {
List<BundleActivator> current;
synchronized (hookActivators) {
current = new ArrayList<BundleActivator>(hookActivators);
hookActivators.clear();
}
for (BundleActivator activator : current) {
try {
activator.stop(context);
} catch (Exception e) {
configuration.getHookRegistry().getContainer().getLogServices().log(EquinoxContainer.NAME, FrameworkLogEntry.ERROR, "Error stopping extension.", e);
}
}
}
private void startExtensionActivator(ModuleRevision extensionRevision, BundleContext context) {
List<Capability> metadata = extensionRevision.getCapabilities(EquinoxModuleDataNamespace.MODULE_DATA_NAMESPACE);
if (metadata.isEmpty()) {
return;
}
String activatorName = (String) metadata.get(0).getAttributes().get(EquinoxModuleDataNamespace.CAPABILITY_ACTIVATOR);
if (activatorName == null) {
return;
}
try {
Class<?> activatorClass = Class.forName(activatorName);
BundleActivator activator = (BundleActivator) activatorClass.newInstance();
startActivator(activator, context);
} catch (Exception e) {
configuration.getHookRegistry().getContainer().getLogServices().log(EquinoxContainer.NAME, FrameworkLogEntry.ERROR, "Error starting extension.", e);
}
}
private void startActivator(BundleActivator activator, BundleContext context) {
try {
activator.start(context);
synchronized (hookActivators) {
hookActivators.add(activator);
}
} catch (Exception e) {
configuration.getHookRegistry().getContainer().getLogServices().log(EquinoxContainer.NAME, FrameworkLogEntry.ERROR, "Error activating extension.", e);
}
}
}
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