| /******************************************************************************* |
| * Copyright (c) 2004, 2010 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.jst.jsp.core.internal; |
| |
| import org.eclipse.core.resources.IResourceChangeEvent; |
| import org.eclipse.core.resources.IResourceChangeListener; |
| import org.eclipse.core.resources.ISaveContext; |
| import org.eclipse.core.resources.ISaveParticipant; |
| import org.eclipse.core.resources.ISavedState; |
| import org.eclipse.core.resources.IWorkspace; |
| import org.eclipse.core.resources.IWorkspaceRunnable; |
| import org.eclipse.core.resources.ResourcesPlugin; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Plugin; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.core.runtime.jobs.Job; |
| import org.eclipse.jdt.core.JavaCore; |
| import org.eclipse.jst.jsp.core.internal.contentmodel.TaglibController; |
| import org.eclipse.jst.jsp.core.internal.contentproperties.JSPFContentPropertiesManager; |
| import org.eclipse.jst.jsp.core.internal.contenttype.DeploymentDescriptorPropertyCache; |
| import org.eclipse.jst.jsp.core.internal.java.search.JSPIndexManager; |
| import org.eclipse.jst.jsp.core.internal.taglib.TaglibHelperManager; |
| import org.eclipse.jst.jsp.core.taglib.TaglibIndex; |
| import org.osgi.framework.BundleContext; |
| |
| /** |
| * The main plugin class to be used in the desktop. |
| */ |
| public class JSPCorePlugin extends Plugin { |
| /** singleton instance of the plugin */ |
| private static JSPCorePlugin plugin; |
| |
| /** |
| * <p>Job used to finish tasks needed to start up the plugin but that did not have |
| * to block the plugin start up process.</p> |
| */ |
| private Job fPluginInitializerJob; |
| |
| /** |
| * The constructor. |
| */ |
| public JSPCorePlugin() { |
| super(); |
| plugin = this; |
| this.fPluginInitializerJob = new PluginInitializerJob(); |
| } |
| |
| /** |
| * Returns the shared instance. |
| */ |
| public static JSPCorePlugin getDefault() { |
| return plugin; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.core.runtime.Plugin#start(org.osgi.framework.BundleContext) |
| */ |
| public void start(BundleContext context) throws Exception { |
| super.start(context); |
| |
| /* |
| * JSPIndexManager depends on TaglibController, so TaglibController |
| * should be started first |
| */ |
| TaglibIndex.startup(); |
| TaglibController.startup(); |
| |
| // listen for classpath changes |
| JavaCore.addElementChangedListener(TaglibHelperManager.getInstance()); |
| |
| //schedule delayed initialization |
| this.fPluginInitializerJob.schedule(2000); |
| |
| // listen for resource changes to update content properties keys |
| JSPFContentPropertiesManager.startup(); |
| |
| DeploymentDescriptorPropertyCache.start(); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.core.runtime.Plugin#stop(org.osgi.framework.BundleContext) |
| */ |
| public void stop(BundleContext context) throws Exception { |
| DeploymentDescriptorPropertyCache.stop(); |
| |
| // stop listening for resource changes to update content properties keys |
| JSPFContentPropertiesManager.shutdown(); |
| |
| //remove the plugin save participant |
| ResourcesPlugin.getWorkspace().removeSaveParticipant(plugin.getBundle().getSymbolicName()); |
| |
| // stop any indexing |
| JSPIndexManager.getDefault().stop(); |
| |
| // stop listening for classpath changes |
| JavaCore.removeElementChangedListener(TaglibHelperManager.getInstance()); |
| |
| // stop taglib controller |
| TaglibController.shutdown(); |
| TaglibIndex.shutdown(); |
| |
| super.stop(context); |
| } |
| |
| /** |
| * <p>A {@link Job} used to perform delayed initialization for the plugin</p> |
| */ |
| private static class PluginInitializerJob extends Job { |
| /** |
| * <p>Default constructor to set up this {@link Job} as a |
| * long running system {@link Job}</p> |
| */ |
| protected PluginInitializerJob() { |
| super(JSPCoreMessages.JSPCorePlugin_Initializing_JSP_Tools); |
| |
| this.setUser(false); |
| this.setSystem(true); |
| this.setPriority(Job.LONG); |
| } |
| |
| /** |
| * <p>Perform delayed initialization for the plugin</p> |
| * |
| * @see org.eclipse.core.runtime.jobs.Job#run(org.eclipse.core.runtime.IProgressMonitor) |
| */ |
| protected IStatus run(IProgressMonitor monitor) { |
| IStatus status = Status.OK_STATUS; |
| final IWorkspace workspace = ResourcesPlugin.getWorkspace(); |
| try { |
| /* |
| * Restore save state and process any events that happened before |
| * plug-in loaded. Don't do it immediately since adding the save |
| * participant requires a lock on the workspace to compute the |
| * accumulated deltas, and if the tree is not already locked it |
| * becomes a blocking call. |
| */ |
| workspace.run(new IWorkspaceRunnable() { |
| public void run(final IProgressMonitor worspaceMonitor) throws CoreException { |
| ISavedState savedState = null; |
| |
| try { |
| //add the save participant for this bundle |
| savedState = ResourcesPlugin.getWorkspace().addSaveParticipant( |
| JSPCorePlugin.plugin.getBundle().getSymbolicName(), new SaveParticipant()); |
| } catch (CoreException e) { |
| Logger.logException("JSP Core Plugin failed at loading previously saved state." + //$NON-NLS-1$ |
| " All componenets dependent on this state will start as if first workspace load.", e); //$NON-NLS-1$ |
| } |
| |
| //if there is a saved state start up using that, else start up cold |
| if(savedState != null) { |
| try { |
| Thread.currentThread().setPriority(Thread.MIN_PRIORITY); |
| } finally { |
| savedState.processResourceChangeEvents(new IResourceChangeListener() { |
| /** |
| * @see org.eclipse.core.resources.IResourceChangeListener#resourceChanged(org.eclipse.core.resources.IResourceChangeEvent) |
| */ |
| public void resourceChanged(IResourceChangeEvent event) { |
| JSPIndexManager.getDefault().start(event.getDelta(), worspaceMonitor); |
| } |
| }); |
| } |
| } else { |
| JSPIndexManager.getDefault().start(null, worspaceMonitor); |
| } |
| } |
| }, monitor); |
| } catch(CoreException e) { |
| status = e.getStatus(); |
| } |
| return status; |
| } |
| |
| } |
| |
| /** |
| * Used so that all of the IResourceChangeEvents that occurred before |
| * this plugin loaded can be processed. |
| */ |
| private static class SaveParticipant implements ISaveParticipant { |
| /** |
| * <p>Default constructor</p> |
| */ |
| protected SaveParticipant() { |
| } |
| |
| /** |
| * @see org.eclipse.core.resources.ISaveParticipant#doneSaving(org.eclipse.core.resources.ISaveContext) |
| */ |
| public void doneSaving(ISaveContext context) { |
| //ignore |
| } |
| |
| /** |
| * @see org.eclipse.core.resources.ISaveParticipant#prepareToSave(org.eclipse.core.resources.ISaveContext) |
| */ |
| public void prepareToSave(ISaveContext context) throws CoreException { |
| //ignore |
| } |
| |
| /** |
| * @see org.eclipse.core.resources.ISaveParticipant#rollback(org.eclipse.core.resources.ISaveContext) |
| */ |
| public void rollback(ISaveContext context) { |
| //ignore |
| } |
| |
| /** |
| * @see org.eclipse.core.resources.ISaveParticipant#saving(org.eclipse.core.resources.ISaveContext) |
| */ |
| public void saving(ISaveContext context) throws CoreException { |
| context.needDelta(); |
| } |
| } |
| } |