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/*******************************************************************************
* Copyright (c) 2019 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.osgi.internal.connect;
import static org.eclipse.osgi.internal.framework.EquinoxContainer.sneakyThrow;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.eclipse.osgi.container.Module;
import org.eclipse.osgi.container.ModuleContainerAdaptor.ModuleEvent;
import org.eclipse.osgi.container.ModuleRevisionBuilder;
import org.eclipse.osgi.internal.framework.EquinoxConfiguration;
import org.eclipse.osgi.internal.framework.EquinoxContainer.ConnectModules;
import org.eclipse.osgi.internal.hookregistry.ActivatorHookFactory;
import org.eclipse.osgi.internal.hookregistry.ClassLoaderHook;
import org.eclipse.osgi.internal.hookregistry.HookConfigurator;
import org.eclipse.osgi.internal.hookregistry.HookRegistry;
import org.eclipse.osgi.internal.hookregistry.StorageHookFactory;
import org.eclipse.osgi.internal.hookregistry.StorageHookFactory.StorageHook;
import org.eclipse.osgi.internal.loader.BundleLoader;
import org.eclipse.osgi.internal.loader.ModuleClassLoader;
import org.eclipse.osgi.storage.BundleInfo.Generation;
import org.eclipse.osgi.storage.bundlefile.BundleFile;
import org.eclipse.osgi.storage.bundlefile.BundleFileWrapperChain;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleException;
import org.osgi.framework.connect.ConnectContent;
import org.osgi.framework.connect.ConnectModule;
import org.osgi.framework.connect.ModuleConnector;
import org.osgi.framework.namespace.BundleNamespace;
import org.osgi.framework.namespace.HostNamespace;
import org.osgi.framework.namespace.IdentityNamespace;
public class ConnectHookConfigurator implements HookConfigurator {
static final Collection<String> CONNECT_TAG_NAMESPACES = new ArrayList<>(Arrays.asList(
BundleNamespace.BUNDLE_NAMESPACE, HostNamespace.HOST_NAMESPACE, IdentityNamespace.IDENTITY_NAMESPACE));
@Override
public void addHooks(final HookRegistry hookRegistry) {
final ConnectModules connectModules = hookRegistry.getContainer().getConnectModules();
ModuleConnector moduleConnector = connectModules.getModuleConnector();
hookRegistry.addStorageHookFactory(new StorageHookFactory<Object, Object, StorageHook<Object, Object>>() {
@Override
protected StorageHook<Object, Object> createStorageHook(Generation generation) {
final ConnectModule m = connectModules.getConnectModule(generation.getBundleInfo().getLocation());
return new StorageHook<Object, Object>(generation, this.getClass()) {
boolean hasModule = false;
@Override
public void save(Object saveContext, DataOutputStream os) throws IOException {
os.writeBoolean(m != null);
}
@Override
public void load(Object loadContext, DataInputStream is) throws IOException {
hasModule = is.readBoolean();
}
@Override
public void validate() throws IllegalStateException {
// make sure we have the module still from the factory
if (hasModule && m == null) {
throw new IllegalStateException("Connect Factory no longer has the module at locataion: " + generation.getBundleInfo().getLocation()); //$NON-NLS-1$
}
}
@Override
public ModuleRevisionBuilder adaptModuleRevisionBuilder(ModuleEvent operation, Module origin, ModuleRevisionBuilder builder) {
if (m != null) {
CONNECT_TAG_NAMESPACES.stream().map(builder::getCapabilities).flatMap(List::stream)
.forEach(c -> c.getAttributes().compute(IdentityNamespace.CAPABILITY_TAGS_ATTRIBUTE,
(k, v) -> {
if (v == null) {
return Collections.singletonList(ConnectContent.TAG_OSGI_CONNECT);
}
if (v instanceof List) {
@SuppressWarnings({ "unchecked", "rawtypes" })
List<String> l = new ArrayList<>((List) v);
l.add(ConnectContent.TAG_OSGI_CONNECT);
return Collections.unmodifiableList(l);
}
// should not get here, but just recover
return Arrays.asList(v, ConnectContent.TAG_OSGI_CONNECT);
}));
return builder;
}
return null;
}
};
}
@Override
public URLConnection handleContentConnection(Module module, String location, InputStream in) {
if (in != null) {
// Do not call ModuleConnector method connect when input stream is non null.
return null;
}
if (location == null) {
location = module.getLocation();
}
try {
ConnectModule m = connectModules.connect(location);
if (m != null) {
return ConnectInputStream.URL_CONNECTION_INSTANCE;
}
} catch (IllegalStateException e) {
if (e.getCause() instanceof BundleException) {
sneakyThrow(e.getCause());
}
}
return null;
}
});
if (moduleConnector == null) {
return;
}
hookRegistry.addClassLoaderHook(new ClassLoaderHook() {
@Override
public ModuleClassLoader createClassLoader(ClassLoader parent, EquinoxConfiguration configuration, BundleLoader delegate, Generation generation) {
ConnectModule m = connectModules.getConnectModule(generation.getBundleInfo().getLocation());
if (m != null) {
BundleFile bundlefile = generation.getBundleFile();
if (bundlefile instanceof BundleFileWrapperChain) {
BundleFileWrapperChain chain = (BundleFileWrapperChain) bundlefile;
while (chain.getNext() != null) {
chain = chain.getNext();
}
bundlefile = chain.getBundleFile();
}
if (bundlefile instanceof ConnectBundleFile) {
return ((ConnectBundleFile) bundlefile).getClassLoader().map((l) //
-> new DelegatingConnectClassLoader(parent, configuration, delegate, generation, l)).orElse(null);
}
}
return null;
}
});
hookRegistry.addActivatorHookFactory(new ActivatorHookFactory() {
@Override
public BundleActivator createActivator() {
final List<BundleActivator> activators = new ArrayList<>();
moduleConnector.newBundleActivator().ifPresent((a) -> activators.add(a));
return new BundleActivator() {
@Override
public void start(BundleContext context) throws Exception {
for (BundleActivator activator : activators) {
activator.start(context);
}
}
@Override
public void stop(BundleContext context) throws Exception {
for (BundleActivator activator : activators) {
activator.stop(context);
}
}
};
}
});
}
}
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