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/*******************************************************************************
* Copyright (c) 2007, 2009 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
* WindRiver - https://bugs.eclipse.org/bugs/show_bug.cgi?id=227372
*******************************************************************************/
package org.eclipse.equinox.internal.p2.engine;
import java.net.URI;
import java.util.*;
import org.eclipse.core.runtime.*;
import org.eclipse.equinox.internal.p2.core.helpers.ServiceHelper;
import org.eclipse.equinox.internal.provisional.p2.artifact.repository.*;
import org.eclipse.equinox.internal.provisional.p2.core.ProvisionException;
import org.eclipse.equinox.internal.provisional.p2.engine.ProvisioningContext;
import org.eclipse.equinox.internal.provisional.p2.repository.IRepositoryManager;
public class DownloadManager {
private ProvisioningContext provContext = null;
ArrayList requestsToProcess = new ArrayList();
private static final String FILE_PROTOCOL = "file"; //$NON-NLS-1$
/**
* This Comparator sorts the repositories such that ´local´ repositories are first
*/
private static final Comparator LOCAL_FIRST_COMPARATOR = new Comparator() {
public int compare(Object arg0, Object arg1) {
Assert.isTrue(arg0 instanceof URI);
Assert.isTrue(arg1 instanceof URI);
String protocol0 = ((URI) arg0).getScheme();
String protocol1 = ((URI) arg1).getScheme();
if (FILE_PROTOCOL.equals(protocol0) && !FILE_PROTOCOL.equals(protocol1))
return -1;
if (!FILE_PROTOCOL.equals(protocol0) && FILE_PROTOCOL.equals(protocol1))
return 1;
return 0;
}
};
public DownloadManager(ProvisioningContext context) {
provContext = context;
}
/*
* Add the given artifact to the download queue. When it
* is downloaded, put it in the specified location.
*/
public void add(IArtifactRequest toAdd) {
Assert.isNotNull(toAdd);
requestsToProcess.add(toAdd);
}
public void add(IArtifactRequest[] toAdd) {
Assert.isNotNull(toAdd);
for (int i = 0; i < toAdd.length; i++) {
add(toAdd[i]);
}
}
private void filterUnfetched() {
for (Iterator iterator = requestsToProcess.iterator(); iterator.hasNext();) {
IArtifactRequest request = (IArtifactRequest) iterator.next();
if (request.getResult() != null && request.getResult().isOK()) {
iterator.remove();
}
}
}
/*
* Start the downloads. Return a status message indicating success or failure of the overall operation
*/
public IStatus start(IProgressMonitor monitor) {
SubMonitor subMonitor = SubMonitor.convert(monitor, Messages.download_artifact, requestsToProcess.size());
try {
if (requestsToProcess.isEmpty())
return Status.OK_STATUS;
IArtifactRepositoryManager repoMgr = (IArtifactRepositoryManager) ServiceHelper.getService(EngineActivator.getContext(), IArtifactRepositoryManager.class.getName());
URI[] repositories = null;
if (provContext == null || provContext.getArtifactRepositories() == null)
repositories = repoMgr.getKnownRepositories(IRepositoryManager.REPOSITORIES_ALL);
else
repositories = provContext.getArtifactRepositories();
if (repositories.length == 0)
return new Status(IStatus.ERROR, EngineActivator.ID, Messages.download_no_repository, new Exception());
Arrays.sort(repositories, LOCAL_FIRST_COMPARATOR);
fetch(repoMgr, repositories, subMonitor);
return overallStatus(monitor);
} finally {
subMonitor.done();
}
}
private void fetch(IArtifactRepositoryManager repoMgr, URI[] repositories, SubMonitor monitor) {
for (int i = 0; i < repositories.length && !requestsToProcess.isEmpty() && !monitor.isCanceled(); i++) {
try {
IArtifactRepository current = repoMgr.loadRepository(repositories[i], monitor.newChild(0));
IArtifactRequest[] requests = getRequestsForRepository(current);
IStatus dlStatus = current.getArtifacts(requests, monitor.newChild(requests.length));
if (dlStatus.getSeverity() == IStatus.CANCEL)
return;
filterUnfetched();
monitor.setWorkRemaining(requestsToProcess.size());
} catch (ProvisionException e) {
//skip unreachable repositories
}
}
}
private IArtifactRequest[] getRequestsForRepository(IArtifactRepository repository) {
ArrayList applicable = new ArrayList();
for (Iterator it = requestsToProcess.iterator(); it.hasNext();) {
IArtifactRequest request = (IArtifactRequest) it.next();
if (repository.contains(request.getArtifactKey()))
applicable.add(request);
}
return (IArtifactRequest[]) applicable.toArray(new IArtifactRequest[applicable.size()]);
}
// private void notifyFetched() {
// ProvisioningEventBus bus = (ProvisioningEventBus) ServiceHelper.getService(DownloadActivator.context, ProvisioningEventBus.class);
// bus.publishEvent();
// }
private IStatus overallStatus(IProgressMonitor monitor) {
if (monitor != null && monitor.isCanceled())
return Status.CANCEL_STATUS;
if (requestsToProcess.size() == 0)
return Status.OK_STATUS;
MultiStatus result = new MultiStatus(EngineActivator.ID, IStatus.OK, null, null);
for (Iterator iterator = requestsToProcess.iterator(); iterator.hasNext();) {
IStatus failed = ((IArtifactRequest) iterator.next()).getResult();
if (failed != null && !failed.isOK())
result.add(failed);
}
return result;
}
}
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