| /******************************************************************************* |
| * 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.cloud.p2; |
| |
| import org.eclipse.core.commands.AbstractHandler; |
| import org.eclipse.core.commands.ExecutionEvent; |
| import org.eclipse.core.runtime.jobs.IJobChangeEvent; |
| import org.eclipse.core.runtime.jobs.Job; |
| import org.eclipse.core.runtime.jobs.JobChangeAdapter; |
| import org.eclipse.equinox.p2.ui.LoadMetadataRepositoryJob; |
| import org.eclipse.equinox.p2.ui.ProvisioningUI; |
| 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 { |
| |
| /** |
| * The constructor. |
| */ |
| public PreloadingRepositoryHandler() { |
| // constructor |
| } |
| |
| /** |
| * Execute the command. |
| */ |
| public Object execute(ExecutionEvent event) { |
| doExecuteAndLoad(); |
| return null; |
| } |
| |
| void doExecuteAndLoad() { |
| if (preloadRepositories()) { |
| //cancel any load that is already running |
| Job.getJobManager().cancel(LoadMetadataRepositoryJob.LOAD_FAMILY); |
| final LoadMetadataRepositoryJob loadJob = new LoadMetadataRepositoryJob(getProvisioningUI()); |
| setLoadJobProperties(loadJob); |
| 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(loadJob); |
| } |
| }); |
| } |
| } |
| }); |
| loadJob.setUser(true); |
| loadJob.schedule(); |
| |
| } else { |
| loadJob.setSystem(true); |
| loadJob.setUser(false); |
| loadJob.schedule(); |
| doExecute(null); |
| } |
| } else { |
| doExecute(null); |
| } |
| } |
| |
| protected abstract void doExecute(LoadMetadataRepositoryJob job); |
| |
| protected boolean preloadRepositories() { |
| return true; |
| } |
| |
| protected boolean waitForPreload() { |
| return true; |
| } |
| |
| protected void setLoadJobProperties(Job loadJob) { |
| loadJob.setProperty(LoadMetadataRepositoryJob.ACCUMULATE_LOAD_ERRORS, Boolean.toString(true)); |
| } |
| |
| protected ProvisioningUI getProvisioningUI() { |
| return ProvisioningUI.getDefaultUI(); |
| } |
| |
| /** |
| * Return a shell appropriate for parenting dialogs of this handler. |
| * @return a Shell |
| */ |
| protected Shell getShell() { |
| return PlatformUI.getWorkbench().getModalDialogShellProvider().getShell(); |
| } |
| } |