pt.webdetails.cdc.servlet.CdcServletContextListener.java Source code

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Here is the source code for pt.webdetails.cdc.servlet.CdcServletContextListener.java

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/*!
* Copyright 2002 - 2014 Webdetails, a Pentaho company.  All rights reserved.
*
* This software was developed by Webdetails and is provided under the terms
* of the Mozilla Public License, Version 2.0, or any later version. You may not use
* this file except in compliance with the license. If you need a copy of the license,
* please go to  http://mozilla.org/MPL/2.0/. The Initial Developer is Webdetails.
*
* Software distributed under the Mozilla Public License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or  implied. Please refer to
* the license for the specific language governing your rights and limitations.
*/

package pt.webdetails.cdc.servlet;

import java.io.IOException;
import java.util.Enumeration;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import pt.webdetails.cdc.core.HazelcastManager;
import pt.webdetails.cdc.core.ICdcConfig;

/**
 * CDC initializer (work in progress). Alternative to CdcLifeCycleListener.
 */
public class CdcServletContextListener implements ServletContextListener {

    private static Log logger = LogFactory.getLog(CdcServletContextListener.class);

    @Override
    public void contextInitialized(ServletContextEvent sce) {
        logger.info("contextInitialized");

        HazelcastManager manager = HazelcastManager.INSTANCE;
        ICdcConfig cdcConfig = new CdcServletConfig(new ServletContextConfig(sce.getServletContext()));
        manager.configure(cdcConfig);
        try {
            manager.init();
        } catch (IOException e) {
            logger.error("Hazelcast Manager failed to initialize", e);
        }
    }

    @Override
    public void contextDestroyed(ServletContextEvent sce) {
        logger.info("contextDestroyed");
        HazelcastManager.INSTANCE.tearDown();
    }

    private static class ServletContextConfig implements ServletConfig {

        private ServletContext context;

        public ServletContextConfig(ServletContext context) {
            this.context = context;
        }

        public String getInitParameter(String param) {
            String value = System.getProperty(param);
            if (StringUtils.isEmpty(value)) {
                value = context.getInitParameter(param);
            }
            return value;
        }

        @SuppressWarnings("rawtypes")
        public Enumeration getInitParameterNames() {
            return context.getInitParameterNames();
        }

        public ServletContext getServletContext() {
            return context;
        }

        public String getServletName() {
            return null;
        }

    }

}