| /******************************************************************************* |
| * Copyright (c) 2001, 2006 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.wst.internet.cache.internal; |
| |
| import java.text.MessageFormat; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.core.runtime.jobs.Job; |
| |
| /** |
| * A cache job runs once an hour to cache any prespecified resources which |
| * should be cached and any resources for which an attempt was previously |
| * made to cache them but they were unable to be cached. |
| */ |
| public class CacheJob extends Job |
| { |
| private static final long SCHEDULE_TIME = 3600000; |
| |
| private static CacheJob job = null; |
| /** |
| * Constructor. |
| */ |
| public CacheJob() |
| { |
| super(CacheMessages._UI_CACHE_MONITOR_NAME); |
| } |
| |
| /** |
| * @see org.eclipse.core.runtime.jobs.Job#run(org.eclipse.core.runtime.IProgressMonitor) |
| */ |
| protected IStatus run(IProgressMonitor monitor) |
| { |
| boolean allSuccessful = true; |
| Cache cache = Cache.getInstance(); |
| String[] uncachedURIs = cache.getUncachedURIs(); |
| int numUncachedURIs = uncachedURIs.length; |
| |
| cache.clearUncachedURIs(); |
| monitor.beginTask(CacheMessages._UI_CACHE_MONITOR_NAME, numUncachedURIs); |
| try |
| { |
| for(int i = 0; i < numUncachedURIs; i++) |
| { |
| if (monitor.isCanceled()) |
| { |
| for(int j = i; j < numUncachedURIs; j++) |
| { |
| cache.addUncachedURI(uncachedURIs[j]); |
| } |
| return Status.CANCEL_STATUS; |
| } |
| String uri = uncachedURIs[i]; |
| monitor.setTaskName(MessageFormat.format(CacheMessages._UI_CACHE_MONITOR_CACHING, new Object[]{uri})); |
| |
| String cachedURI = cache.getResource(uri); |
| if(cachedURI == null) |
| { |
| allSuccessful = false; |
| } |
| monitor.worked(1); |
| } |
| monitor.done(); |
| return Status.OK_STATUS; |
| } |
| finally |
| { |
| // If all the uncached URIs could not be cached |
| // schedule the next time the job should run. |
| if(!allSuccessful) |
| { |
| startJob(SCHEDULE_TIME); |
| } |
| } |
| } |
| |
| /** |
| * Start the cache job. The cache job caches resources that were not able to be previously |
| * downloaded. Only one job is run at a time. |
| */ |
| protected static void startJob() |
| { |
| if(job == null) |
| { |
| startJob(0); |
| } |
| } |
| |
| /** |
| * Start a new cache job with the specified delay. |
| * |
| * @param delay |
| * The start delay for the cache job. |
| */ |
| private static void startJob(long delay) |
| { |
| job = new CacheJob(); |
| job.setPriority(CacheJob.DECORATE); |
| job.schedule(delay); // start as soon as possible |
| } |
| |
| /** |
| * Stop the current cache job. The cache job caches resources that were not able to be previously |
| * downloaded. |
| */ |
| protected static void stopJob() |
| { |
| if (job != null) |
| { |
| job.cancel(); |
| } |
| job = null; |
| } |
| |
| } |
| |
| |