| /* |
| * Copyright 1999-2005 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.cocoon.components.store.impl; |
| |
| import org.apache.avalon.framework.activity.Disposable; |
| import org.apache.avalon.framework.component.Component; |
| import org.apache.avalon.framework.parameters.ParameterException; |
| import org.apache.avalon.framework.parameters.Parameterizable; |
| import org.apache.avalon.framework.parameters.Parameters; |
| import org.apache.avalon.framework.service.ServiceException; |
| import org.apache.avalon.framework.service.ServiceManager; |
| import org.apache.avalon.framework.service.Serviceable; |
| |
| import org.apache.cocoon.components.thread.RunnableManager; |
| |
| /** |
| * The CocoonStoreJanitor class just subclasses the {@link StoreJanitorImpl} to |
| * overwrite the start method for background thread creation using the Cocoon |
| * {@link RunnableManager}. |
| * |
| * @version $Id$ |
| */ |
| public class CocoonStoreJanitor extends StoreJanitorImpl |
| implements Parameterizable, Serviceable, Disposable, Component { |
| |
| //~ Instance fields -------------------------------------------------------- |
| |
| /** Name of the thread pool to use. Defaults to 'daemon'. */ |
| private String threadPool; |
| |
| /** Our {@link ServiceManager} */ |
| private ServiceManager serviceManager; |
| |
| /** Our {@link RunnableManager} */ |
| private RunnableManager runnableManager; |
| |
| /** Flags to ignore memory bursts in the startup */ |
| private boolean m_firstRun = true; |
| |
| /** Flags to ignore memory bursts in the startup */ |
| private boolean m_secondRun = false; |
| |
| //~ Methods ---------------------------------------------------------------- |
| |
| public void parameterize(Parameters params) throws ParameterException { |
| super.parameterize(params); |
| this.threadPool = params.getParameter("thread-pool", "daemon"); |
| } |
| |
| /** |
| * Get the <code>RunnableManager</code> |
| * |
| * @param serviceManager The <code>ServiceManager</code> |
| * @throws ServiceException If RunnableManager is not available |
| */ |
| public void service(final ServiceManager serviceManager) |
| throws ServiceException { |
| this.serviceManager = serviceManager; |
| this.runnableManager = (RunnableManager) serviceManager.lookup(RunnableManager.ROLE); |
| } |
| |
| /** |
| * Release <code>RunnableManager</code> |
| */ |
| public void dispose() { |
| this.serviceManager.release(this.runnableManager); |
| this.runnableManager = null; |
| this.serviceManager = null; |
| } |
| |
| /** |
| * The "checker" thread checks if memory is running low in the jvm. |
| */ |
| public void run() { |
| // Ignoring memory bursts in the first two invokations |
| if (m_firstRun || m_secondRun) { |
| super.inUse = super.memoryInUse(); |
| m_secondRun = m_firstRun; |
| m_firstRun = false; |
| } |
| |
| super.checkMemory(); |
| |
| // Relaunch |
| relaunch(super.interval); |
| } |
| |
| /** |
| * Start this instance using a default thread from the |
| * <code>RunnableManager</code> |
| */ |
| public void start() { |
| relaunch(0); |
| } |
| |
| /** |
| * Does a delayed (re-)start of this instance using a default thread from |
| * the<code>RunnableManager</code> with a delay |
| * |
| * @param delay the delay to apply before next run |
| */ |
| private void relaunch(final long delay) { |
| getLogger().debug("(Re-)Start CocoonStoreJanitor"); |
| this.runnableManager.execute(this.threadPool, this, delay, 0); |
| } |
| } |