| /******************************************************************************* |
| * Copyright (c) 2000, 2017 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.team.internal.core.subscribers; |
| |
| import org.eclipse.core.resources.IResource; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.jobs.Job; |
| import org.eclipse.team.core.subscribers.Subscriber; |
| import org.eclipse.team.core.synchronize.SyncInfo; |
| import org.eclipse.team.core.synchronize.SyncInfoFilter; |
| import org.eclipse.team.core.synchronize.SyncInfoSet; |
| import org.eclipse.team.core.synchronize.SyncInfoTree; |
| import org.eclipse.team.internal.core.Policy; |
| |
| /** |
| * This collector maintains a {@link SyncInfoSet} for a particular team subscriber keeping |
| * it up-to-date with both incoming changes and outgoing changes as they occur for |
| * resources in the workspace. The collector can be configured to consider all the subscriber's |
| * roots or only a subset. |
| * <p> |
| * The advantage of this collector is that it processes both resource and team |
| * subscriber deltas in a background thread. |
| * </p> |
| * @since 3.0 |
| */ |
| public final class SubscriberSyncInfoCollector extends SubscriberResourceCollector { |
| |
| private final SyncSetInputFromSubscriber subscriberInput; |
| private SyncSetInputFromSyncSet filteredInput; |
| private SubscriberSyncInfoEventHandler eventHandler; |
| private IResource[] roots; |
| |
| /** |
| * Create a collector that collects out-of-sync resources that are children of |
| * the given roots. If the roots are <code>null</code>, then all out-of-sync resources |
| * from the subscriber are collected. An empty array of roots will cause no resources |
| * to be collected. The <code>start()</code> method must be called after creation |
| * to prime the collector's sync sets. |
| * @param subscriber the Subscriber |
| * @param roots the roots of the out-of-sync resources to be collected |
| */ |
| public SubscriberSyncInfoCollector(Subscriber subscriber, IResource[] roots) { |
| super(subscriber); |
| this.roots = roots; |
| this.eventHandler = new SubscriberSyncInfoEventHandler(subscriber, roots); |
| this.subscriberInput = eventHandler.getSyncSetInput(); |
| filteredInput = new SyncSetInputFromSyncSet(subscriberInput.getSyncSet(), getEventHandler()); |
| filteredInput.setFilter(new SyncInfoFilter() { |
| @Override |
| public boolean select(SyncInfo info, IProgressMonitor monitor) { |
| return true; |
| } |
| }); |
| |
| } |
| |
| public void setProgressGroup(IProgressMonitor monitor, int ticks) { |
| getEventHandler().setProgressGroupHint(monitor, ticks); |
| } |
| |
| /** |
| * Start the collector. |
| */ |
| public void start() { |
| eventHandler.start(); |
| } |
| |
| /** |
| * This causes the calling thread to wait any background collection of |
| * out-of-sync resources to stop before returning. |
| * |
| * @param monitor |
| * a progress monitor |
| */ |
| public void waitForCollector(IProgressMonitor monitor) { |
| monitor.worked(1); |
| int i = 0; |
| // wait for the event handler to process changes |
| while (true) { |
| try { |
| Thread.sleep(5); |
| } catch (InterruptedException e) { |
| } |
| Policy.checkCanceled(monitor); |
| |
| // increment the counter or reset it if the job is running |
| i = (eventHandler.getEventHandlerJob().getState() == Job.NONE) ? i + 1 : 0; |
| |
| // 50 positive checks in a row |
| if (i == 50) |
| break; |
| } |
| monitor.worked(1); |
| } |
| |
| /** |
| * Clears this collector's sync info sets and causes them to be recreated from the |
| * associated <code>Subscriber</code>. The reset will occur in the background. If the |
| * caller wishes to wait for the reset to complete, they should call |
| * waitForCollector(IProgressMonitor). |
| */ |
| public void reset() { |
| eventHandler.reset(getRoots()); |
| } |
| |
| /** |
| * Disposes of the background job associated with this collector and de-registers |
| * all it's listeners. This method must be called when the collector is no longer |
| * referenced and could be garbage collected. |
| */ |
| @Override |
| public void dispose() { |
| eventHandler.shutdown(); |
| subscriberInput.disconnect(); |
| if(filteredInput != null) { |
| filteredInput.disconnect(); |
| } |
| super.dispose(); |
| } |
| |
| /** |
| * Return the roots that are being considered by this collector. |
| * By default, the collector is interested in the roots of its |
| * subscriber. However, the set can be reduced using {@link #setRoots(IResource[])}. |
| * @return the roots |
| */ |
| @Override |
| public IResource[] getRoots() { |
| if (roots == null) { |
| return super.getRoots(); |
| } else { |
| return roots; |
| } |
| } |
| |
| /* |
| * Returns whether the collector is configured to collect for |
| * all roots of the subscriber or not |
| * @return <code>true</code> if the collector is considering all |
| * roots of the subscriber and <code>false</code> otherwise |
| */ |
| @Override |
| public boolean isAllRootsIncluded() { |
| return roots == null; |
| } |
| |
| /** |
| * Return the event handler that performs the background processing for this collector. |
| * The event handler also serves the purpose of serializing the modifications and adjustments |
| * to the collector's sync sets in order to ensure that the state of the sets is kept |
| * consistent. |
| * @return Returns the eventHandler. |
| */ |
| protected SubscriberEventHandler getEventHandler() { |
| return eventHandler; |
| } |
| |
| /** |
| * Return the <code>SyncInfoSet</code> that contains all the out-of-sync resources for the |
| * subscriber that are descendants of the roots of this collector. The set will contain only those resources that are children of the roots |
| * of the collector unless the roots of the collector has been set to <code>null</code> |
| * in which case all out-of-sync resources from the subscriber are collected. |
| * @return the subscriber sync info set |
| */ |
| public SyncInfoTree getSubscriberSyncInfoSet() { |
| return subscriberInput.getSyncSet(); |
| } |
| |
| public SyncInfoTree getSyncInfoSet() { |
| return filteredInput.getSyncSet(); |
| } |
| |
| /** |
| * Set the filter for this collector. Only elements that match the filter will |
| * be in the out sync info set. |
| * @param filter the sync info filter |
| */ |
| public void setFilter(SyncInfoFilter filter) { |
| filteredInput.setFilter(filter); |
| filteredInput.reset(); |
| } |
| |
| public void setRoots(IResource[] roots) { |
| this.roots = roots; |
| reset(); |
| } |
| |
| @Override |
| protected boolean hasMembers(IResource resource) { |
| return getSubscriberSyncInfoSet().hasMembers(resource); |
| } |
| |
| @Override |
| protected void remove(IResource resource) { |
| eventHandler.remove(resource); |
| } |
| |
| @Override |
| protected void change(IResource resource, int depth) { |
| eventHandler.change(resource, depth); |
| } |
| } |