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/*******************************************************************************
* Copyright (c) 2007, 2008 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.equinox.internal.p2.installregistry;
import java.net.URL;
import java.util.ArrayList;
import java.util.EventObject;
import org.eclipse.equinox.internal.p2.core.helpers.LogHelper;
import org.eclipse.equinox.internal.p2.core.helpers.ServiceHelper;
import org.eclipse.equinox.internal.p2.engine.EngineActivator;
import org.eclipse.equinox.internal.provisional.p2.core.ProvisionException;
import org.eclipse.equinox.internal.provisional.p2.core.eventbus.ProvisioningEventBus;
import org.eclipse.equinox.internal.provisional.p2.core.eventbus.ProvisioningListener;
import org.eclipse.equinox.internal.provisional.p2.core.location.AgentLocation;
import org.eclipse.equinox.internal.provisional.p2.core.repository.IRepository;
import org.eclipse.equinox.internal.provisional.p2.engine.*;
import org.eclipse.equinox.internal.provisional.p2.metadata.IInstallableUnit;
import org.eclipse.equinox.internal.provisional.p2.metadata.repository.IMetadataRepository;
import org.eclipse.equinox.internal.provisional.p2.metadata.repository.IMetadataRepositoryManager;
import org.osgi.framework.ServiceReference;
public class MetadataCache {
static final private String REPOSITORY_NAME = "Agent Metadata Cache"; //$NON-NLS-1$
private ServiceReference busReference;
private ProvisioningEventBus bus;
private URL location;
//tracks the IUs that have been installed but not yet committed
//TODO: This will work if a single profile is being modified but we should consider how to handle multiple concurrent profile changes.OD
final ArrayList toAdd = new ArrayList();
public MetadataCache() {
AgentLocation agentLocation = (AgentLocation) ServiceHelper.getService(EngineActivator.getContext(), AgentLocation.class.getName());
location = (agentLocation != null ? agentLocation.getMetadataRepositoryURL() : null);
hookListener();
}
IMetadataRepository getRepository() {
IMetadataRepositoryManager manager = (IMetadataRepositoryManager) ServiceHelper.getService(EngineActivator.getContext(), IMetadataRepositoryManager.class.getName());
try {
return manager.loadRepository(location, null);
} catch (ProvisionException e) {
//fall through and create a new repository
}
try {
IMetadataRepository repository = manager.createRepository(location, REPOSITORY_NAME, IMetadataRepositoryManager.TYPE_SIMPLE_REPOSITORY);
repository.setProperty(IRepository.PROP_SYSTEM, Boolean.TRUE.toString());
return repository;
} catch (ProvisionException e) {
LogHelper.log(e);
throw new IllegalStateException("Metadata cache could not be created"); //$NON-NLS-1$
}
}
private void hookListener() {
// TODO: We should check for writing permission here, otherwise it may be too late
busReference = EngineActivator.getContext().getServiceReference(ProvisioningEventBus.class.getName());
bus = (ProvisioningEventBus) EngineActivator.getContext().getService(busReference);
bus.addListener(new ProvisioningListener() {
public void notify(EventObject o) {
if (o instanceof InstallableUnitEvent) { //TODO This dependency on InstallableUnitEvent is not great
InstallableUnitEvent event = (InstallableUnitEvent) o;
if (event.isPre())
return;
// TODO: what about uninstall??
if (event.isPost() && event.getResult().isOK() && event.isInstall()) {
IInstallableUnit installedIU = event.getOperand().second();
if (installedIU != null)
toAdd.add(installedIU.unresolved());
return;
}
}
if (o instanceof CommitOperationEvent) {
IInstallableUnit[] toAddArray = (IInstallableUnit[]) toAdd.toArray(new IInstallableUnit[toAdd.size()]);
toAdd.clear();
getRepository().addInstallableUnits(toAddArray);
}
if (o instanceof RollbackOperationEvent)
toAdd.clear();
}
});
}
}
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