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/*******************************************************************************
* Copyright (c) 2008, 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
*******************************************************************************/
package org.eclipse.equinox.p2.examples.rcp.sdkbundlevisibility.p2;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.runtime.*;
import org.eclipse.core.runtime.jobs.*;
import org.eclipse.equinox.internal.provisional.p2.core.ProvisionException;
import org.eclipse.equinox.internal.provisional.p2.engine.IProfileRegistry;
import org.eclipse.equinox.internal.provisional.p2.ui.ProvUI;
import org.eclipse.equinox.internal.provisional.p2.ui.QueryableMetadataRepositoryManager;
import org.eclipse.equinox.internal.provisional.p2.ui.policy.Policy;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.custom.BusyIndicator;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.PlatformUI;
/**
* PreloadingRepositoryHandler provides background loading of repositories
* before executing the provisioning handler.
*
* @since 3.5
*/
abstract class PreloadingRepositoryHandler extends AbstractHandler {
Object LOAD_FAMILY = new Object();
/**
* The constructor.
*/
public PreloadingRepositoryHandler() {
// constructor
}
/**
* Execute the command.
*/
public Object execute(ExecutionEvent event) {
final String profileId = IProfileRegistry.SELF;
BusyIndicator.showWhile(getShell().getDisplay(), new Runnable() {
public void run() {
doExecuteAndLoad(profileId, preloadRepositories());
}
});
return null;
}
void doExecuteAndLoad(final String profileId, boolean preloadRepositories) {
// cancel any load that is already running
Job.getJobManager().cancel(LOAD_FAMILY);
final QueryableMetadataRepositoryManager queryableManager = new QueryableMetadataRepositoryManager(
Policy.getDefault().getQueryContext(), false);
if (preloadRepositories) {
Job loadJob = new Job(
Messages.InstallNewSoftwareHandler_LoadRepositoryJobLabel) {
protected IStatus run(IProgressMonitor monitor) {
queryableManager.loadAll(monitor);
return Status.OK_STATUS;
}
public boolean belongsTo(Object family) {
return family == LOAD_FAMILY;
}
};
if (waitForPreload()) {
loadJob.addJobChangeListener(new JobChangeAdapter() {
public void done(IJobChangeEvent event) {
if (PlatformUI.isWorkbenchRunning())
if (event.getResult().isOK()) {
PlatformUI.getWorkbench().getDisplay()
.asyncExec(new Runnable() {
public void run() {
doExecute(profileId,
queryableManager);
}
});
}
}
});
loadJob.setUser(true);
loadJob.schedule();
} else {
loadJob.setSystem(true);
loadJob.setUser(false);
loadJob.schedule();
doExecute(profileId, queryableManager);
}
} else {
doExecute(profileId, queryableManager);
}
}
protected abstract void doExecute(String profileId,
QueryableMetadataRepositoryManager manager);
protected boolean preloadRepositories() {
return true;
}
protected boolean waitForPreload() {
return true;
}
/**
* Return a shell appropriate for parenting dialogs of this handler.
*
* @return a Shell
*/
protected Shell getShell() {
return ProvUI.getDefaultParentShell();
}
}
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