Subversion Repositories XServices

/*

 *   Copyright 2012 Brian Rosenberger (Brutex Network)

 *

 *   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 net.brutex.xservices.util.cache;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

import java.util.concurrent.ThreadFactory;

import javax.servlet.ServletContext;

import javax.servlet.ServletContextEvent;

import javax.servlet.ServletContextListener;

/**

 * @author Brian Rosenberger, bru(at)brutex.de

 * @since 0.5.0-20120825

 */

public class CacheExecutorService implements ServletContextListener {

	static final String EXECUTOR_NAME = "CACHE_EXECUTOR";

    private  ExecutorService executor;

    public void contextInitialized(ServletContextEvent arg0) {

        ServletContext context = arg0.getServletContext();

        int nr_executors = 1;

        ThreadFactory daemonFactory = new DaemonThreadFactory();

        try {

            nr_executors = Integer.parseInt(context.getInitParameter("cache:thread-count"));

        } catch (NumberFormatException ignore ) {}

        if(nr_executors <= 1) {

        executor = Executors.newSingleThreadExecutor(daemonFactory);

        } else {

        executor = Executors.newFixedThreadPool(nr_executors,daemonFactory);

       }

          context.setAttribute(EXECUTOR_NAME, executor);

      }

    public void contextDestroyed(ServletContextEvent arg0) {

        ServletContext context = arg0.getServletContext();

        executor.shutdownNow(); // or process/wait until all pending jobs are done

    }

}