protected void initProvisioningAgent() throws RuntimeException {
	try {
		// Inject references
		BundleContext bundleContext = FrameworkUtil.getBundle(UpdateManager.class).getBundleContext();
		IEclipseContext serviceContext = EclipseContextFactory.getServiceContext(bundleContext);
		ContextInjectionFactory.inject(this, serviceContext);
		// get p2 agent for current system(Eclipse instance in this
		// case)
		// the location for the currently running system is null (see
		// docs)
		p2Agent = agentProvider.createAgent(null);
		session = new ProvisioningSession(p2Agent);
		artifactRepoManager = (IArtifactRepositoryManager) p2Agent
				.getService(IArtifactRepositoryManager.class.getName());
		metadataRepoManager = (IMetadataRepositoryManager) p2Agent
				.getService(IMetadataRepositoryManager.class.getName());

	} catch (Exception e) {
		throw new RuntimeException(Messages.UpdateManager_14, e);
	}
}
 

/**
 * Check for application updates.
 * 
 * @param agent
 * @param monitor
 * @return
 * @throws OperationCanceledException
 */
public static IStatus checkForUpdates(IProvisioningAgent agent, IProgressMonitor monitor)
	throws OperationCanceledException{
	System.out.println(">> checkForUpdates");
	ProvisioningSession session = new ProvisioningSession(agent);
	UpdateOperation operation = new UpdateOperation(session);
	SubMonitor sub = SubMonitor.convert(monitor, "Checking for application updates...", 200);
	return operation.resolveModal(sub.newChild(100));
}
 

/**
 * Download and install application updates.
 * 
 * @param agent
 * @param monitor
 * @return
 * @throws OperationCanceledException
 */
public static IStatus installUpdates(IProvisioningAgent agent, IProgressMonitor monitor)
	throws OperationCanceledException{
	ProvisioningSession session = new ProvisioningSession(agent);
	UpdateOperation operation = new UpdateOperation(session);
	SubMonitor sub = SubMonitor.convert(monitor, "Installing updates ...", 200);
	operation.resolveModal(sub.newChild(100));
	ProvisioningJob job = operation.getProvisioningJob(monitor);
	return job.runModal(sub.newChild(100));
}
 

/**
 * Install selected updates in to developer studio. Note: call
 * {@link #setSelectedUpdates(List) setSelectedUpdates} first.
 * 
 * @param monitor
 */
public void installSelectedUpdates(IProgressMonitor monitor) {
	SubMonitor progress = SubMonitor.convert(monitor, Messages.UpdateManager_26, 2);
	URI[] repos = new URI[] { getDevStudioUpdateSite() };
	session = new ProvisioningSession(p2Agent);
	updateOperation = new UpdateOperation(session);
	updateOperation.getProvisioningContext().setArtifactRepositories(repos);
	updateOperation.getProvisioningContext().setMetadataRepositories(repos);

	updateOperation.setSelectedUpdates(selectedUpdates);
	IStatus status = updateOperation.resolveModal(progress.newChild(1));
	if (status.getSeverity() == IStatus.CANCEL) {
		throw new OperationCanceledException();
	} else if (status.getSeverity() == IStatus.ERROR) {
		String message = status.getChildren()[0].getMessage();
		UpdateMetaFileReaderJob.promptUserError(message, Messages.UpdateManager_27);
		log.error(Messages.UpdateManager_27 + message);
	} else {
		final ProvisioningJob provisioningJob = updateOperation.getProvisioningJob(progress.newChild(1));
		if (provisioningJob != null) {
			provisioningJob.addJobChangeListener(new JobChangeAdapter() {
				@Override
				public void done(IJobChangeEvent arg0) {
					Display.getDefault().syncExec(new Runnable() {
						@Override
						public void run() {
							boolean restart = MessageDialog.openQuestion(Display.getDefault().getActiveShell(),
									Messages.UpdateManager_28,
									Messages.UpdateManager_29 + Messages.UpdateManager_30);
							if (restart) {
								PlatformUI.getWorkbench().restart();
							}
						}
					});
				}
			});
			provisioningJob.schedule();
			Display.getDefault().syncExec(new Runnable() {
				@Override
				public void run() {
					try {
						PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage()
								.showView(IProgressConstants.PROGRESS_VIEW_ID);
					} catch (PartInitException e) {
						log.error(e);
					}
				}
			});
		} else {
			log.error(Messages.UpdateManager_31);
		}
	}
}
 

/**
 * Install selected features in to developer studio. Note: call
 * {@link #setSelectedFeaturesToInstall(List) setSelectedFeaturesToInstall}
 * first.
 * 
 * @param monitor
 */
public void installSelectedFeatures(IProgressMonitor monitor) {
	SubMonitor progress = SubMonitor.convert(monitor, Messages.UpdateManager_32, 2);

	URI[] repos = new URI[] { getDevStudioReleaseSite() };
	session = new ProvisioningSession(p2Agent);
	installOperation = new InstallOperation(session, selectedFeatures);
	installOperation.getProvisioningContext().setArtifactRepositories(repos);
	installOperation.getProvisioningContext().setMetadataRepositories(repos);
	IStatus status = installOperation.resolveModal(progress.newChild(1));
	if (status.getSeverity() == IStatus.CANCEL || progress.isCanceled()) {
		throw new OperationCanceledException();
	} else if (status.getSeverity() == IStatus.ERROR) {
		String message = status.getChildren()[0].getMessage();
		log.error(Messages.UpdateManager_33 + message);
		UpdateMetaFileReaderJob.promptUserError(message, Messages.UpdateManager_33);
	} else {
		ProvisioningJob provisioningJob = installOperation.getProvisioningJob(progress.newChild(1));
		if (provisioningJob != null) {
			provisioningJob.addJobChangeListener(new JobChangeAdapter() {
				@Override
				public void done(IJobChangeEvent arg0) {
					Display.getDefault().syncExec(new Runnable() {
						@Override
						public void run() {
							boolean restart = MessageDialog.openQuestion(Display.getDefault().getActiveShell(),
									Messages.UpdateManager_34,
									Messages.UpdateManager_35 + Messages.UpdateManager_36);
							if (restart) {
								PlatformUI.getWorkbench().restart();
							}
						}
					});
				}
			});
			provisioningJob.schedule();
			Display.getDefault().syncExec(new Runnable() {
				@Override
				public void run() {
					try {
						PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage()
								.showView(IProgressConstants.PROGRESS_VIEW_ID);
					} catch (PartInitException e) {
						log.error(e);
					}
				}
			});
		} else {
			log.error(Messages.UpdateManager_37);
		}
	}
}