diff options
Diffstat (limited to 'plugins/org.eclipse.jem.beaninfo/beaninfo/org/eclipse/jem/internal/beaninfo/adapters/CreateRegistryJobHandler.java')
| -rw-r--r-- | plugins/org.eclipse.jem.beaninfo/beaninfo/org/eclipse/jem/internal/beaninfo/adapters/CreateRegistryJobHandler.java | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/plugins/org.eclipse.jem.beaninfo/beaninfo/org/eclipse/jem/internal/beaninfo/adapters/CreateRegistryJobHandler.java b/plugins/org.eclipse.jem.beaninfo/beaninfo/org/eclipse/jem/internal/beaninfo/adapters/CreateRegistryJobHandler.java deleted file mode 100644 index a676113ce..000000000 --- a/plugins/org.eclipse.jem.beaninfo/beaninfo/org/eclipse/jem/internal/beaninfo/adapters/CreateRegistryJobHandler.java +++ /dev/null @@ -1,165 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2004, 2005 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 - *******************************************************************************/ -/* - * $RCSfile: CreateRegistryJobHandler.java,v $ - * $Revision: 1.14 $ $Date: 2005/08/24 20:31:29 $ - */ -package org.eclipse.jem.internal.beaninfo.adapters; - -import java.util.logging.Level; - -import org.eclipse.core.resources.ResourcesPlugin; -import org.eclipse.core.runtime.*; -import org.eclipse.core.runtime.jobs.*; - -import org.eclipse.jem.internal.beaninfo.core.BeaninfoPlugin; -import org.eclipse.jem.util.logger.proxy.Logger; - - - -/** - * This class is used by BeaninfoNature to handle the creation of the registry, - * This class will be a singleton. It is needed to handle if UI active without - * requiring UI plugin. (So headless will work too). The subclass <code>UICreateRegistryJobHandler</code> - * will be instantiated in case of UI active. - * @since 1.0.0 - */ -class CreateRegistryJobHandler { - private static CreateRegistryJobHandler jobHandler = null; - - public static void createRegistry(BeaninfoNature nature) { - synchronized (CreateRegistryJobHandler.class) { - if (jobHandler == null) { - if (Platform.getBundle("org.eclipse.ui") != null) { //$NON-NLS-1$ - try { - // There is a UI, it may not be active, but bring in UICreateRegistryJobHandler to do the - // actual work since it can reference the UI. - jobHandler = (CreateRegistryJobHandler) Class.forName("org.eclipse.jem.internal.beaninfo.adapters.UICreateRegistryJobHandler").newInstance(); //$NON-NLS-1$ - } catch (InstantiationException e) { - jobHandler = new CreateRegistryJobHandler(); - } catch (IllegalAccessException e) { - jobHandler = new CreateRegistryJobHandler(); - } catch (ClassNotFoundException e) { - jobHandler = new CreateRegistryJobHandler(); - } - } - } - } - - // See if Autobuild sleeping or waiting. This could be a race condition for us. We can't wait for it - // because we may already have the build rule locked by our thread. No way of testing this if beginRule was used. - // We can test if we are a build job (not an inline build), and if so, just go on. - // Maybe we can figure out in future if we find race condition happens significant amount of time. - IJobManager jobManager = Platform.getJobManager(); - Job currentJob = jobManager.currentJob(); - if (currentJob == null || (!currentJob.belongsTo(ResourcesPlugin.FAMILY_AUTO_BUILD) && !currentJob.belongsTo(ResourcesPlugin.FAMILY_MANUAL_BUILD))) { - // See if autojob is waiting or sleeping. - // Give it up to a second at .2 second intervals to try (i.e. 5 tries) - int tries = 5; - while (isAutoWaiting() && --tries>0) { - try { - Thread.sleep(200); // Wait just .2 seconds to give build a chance to start. If it is still not started, then just go on. - } catch (InterruptedException e) { - } - } - if (tries==0) { - Logger logger = BeaninfoPlugin.getPlugin().getLogger(); - if (logger.isLoggingLevel(Level.WARNING)) - logger.log("Build job waiting when trying to start beaninfo registry. Possible race.", Level.WARNING); // $NON-NLS-1$ //$NON-NLS-1$ - } - } - - jobHandler.processCreateRegistry(nature); - } - - private static boolean isAutoWaiting() { - Job[] autojobs = Platform.getJobManager().find(ResourcesPlugin.FAMILY_AUTO_BUILD); - for (int i = 0; i < autojobs.length; i++) { - int state = autojobs[i].getState(); - if (state == Job.WAITING || state == Job.SLEEPING) - return true; - } - return false; - } - - - /** - * Process the create of the registry. This should be overridden to - * do what the UI needs. The UI implimentation should call doCreateRegistry at the - * appropriate time. - * - * @param nature - * - * @since 1.0.0 - */ - protected void processCreateRegistry(final BeaninfoNature nature) { - IJobManager jobManager = Platform.getJobManager(); - ISchedulingRule buildRule = ResourcesPlugin.getWorkspace().getRuleFactory().buildRule(); - boolean gotRuleLocally = true; - try { - try { - jobManager.beginRule(buildRule, new NullProgressMonitor()); - } catch (IllegalArgumentException e) { - gotRuleLocally = false; // This thread already had a rule, and it conflicted with the build rule, so we need to spawn off. - } - if (gotRuleLocally) - doCreateRegistry(nature, new NullProgressMonitor()); - } finally { - jobManager.endRule(buildRule); // Whether we got the rule or not, we must do endrule. - } - - if (!gotRuleLocally) { - // Spawn off to a job and wait for it. Hopefully we don't have a deadlock somewhere. - Job doCreateJob = new Job(BeanInfoAdapterMessages.UICreateRegistryJobHandler_StartBeaninfoRegistry) { - - protected IStatus run(IProgressMonitor monitor) { - doCreateRegistry(nature, monitor); - return Status.OK_STATUS; - } - }; - doCreateJob.schedule(); - while (true) { - try { - doCreateJob.join(); - break; - } catch (InterruptedException e) { - } - } - } - } - - /* - * Do the creation. It is expected that the build rule has already been given to this thread. - * It is important that the build rule be given to this thread. This is so that a build won't - * start trying to create the same registry (which has happened in the past) at the same time - * a different thread was trying to start the registry. You would either have a deadlock, or - * a race and get two different registries started. - * - * The build rule also means that all beaninfo registry creations will be serialized and have - * a race condition. The unfortunate part is that two independent project's registries can't be - * created at same time. But that is the result of the build rule. We can't allow the builds, so - * we need to stop all parallel beaninfo registry creations. - * - * @param nature - * @param pm - * - * @since 1.0.0 - */ - protected final void doCreateRegistry(BeaninfoNature nature, IProgressMonitor pm) { - pm.beginTask("", 100); //$NON-NLS-1$ - try { - nature.createRegistry(new SubProgressMonitor(pm, 100)); - } finally { - pm.done(); - } - } - -} |