be.fedict.eid.dss.webapp.StartupServletContextListener.java Source code

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Here is the source code for be.fedict.eid.dss.webapp.StartupServletContextListener.java

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/*
 * eID Digital Signature Service Project.
 * Copyright (C) 2009-2010 FedICT.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version
 * 3.0 as published by the Free Software Foundation.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, see 
 * http://www.gnu.org/licenses/.
 */

package be.fedict.eid.dss.webapp;

import java.util.Map;

import javax.ejb.EJB;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

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

import be.fedict.eid.dss.model.DocumentService;
import be.fedict.eid.dss.model.ServicesManager;
import be.fedict.eid.dss.model.exception.InvalidCronExpressionException;

/**
 * Startup servlet component. This servlet context listener boots up the eID DSS
 * system.
 * 
 * @author Frank Cornelis
 */
public class StartupServletContextListener implements ServletContextListener {

    private static final Log LOG = LogFactory.getLog(StartupServletContextListener.class);

    private static final String PROTOCOL_SERVICES_CONTEXT_ATTRIBUTE = StartupServletContextListener.class.getName()
            + ".ProtocolServices";

    private static final String DOCUMENT_SERVICES_CONTEXT_ATTRIBUTE = StartupServletContextListener.class.getName()
            + ".DocumentServices";

    @EJB
    private ServicesManager servicesManager;

    @EJB
    private DocumentService documentService;

    public void contextInitialized(ServletContextEvent event) {

        LOG.debug("contextInitialized");

        initCleanupTask();

        initProtocolServices(event);

        initDocumentServices(event);
    }

    public void contextDestroyed(ServletContextEvent event) {
        LOG.debug("contextDestroyed");
    }

    private void initCleanupTask() {

        LOG.debug("init cleanup task");

        try {
            this.documentService.startTimer();
        } catch (InvalidCronExpressionException e) {
            throw new RuntimeException(e);
        }
    }

    private void initProtocolServices(ServletContextEvent event) {

        /*
         * We once load the protocol services so we don't have to iterate over
         * all protocol descriptor files upon each DSS request.
         */
        ServletContext servletContext = event.getServletContext();
        Map<String, String> protocolServiceClassNames = this.servicesManager.getProtocolServiceClassNames();
        servletContext.setAttribute(PROTOCOL_SERVICES_CONTEXT_ATTRIBUTE, protocolServiceClassNames);
    }

    private void initDocumentServices(ServletContextEvent event) {

        ServletContext servletContext = event.getServletContext();
        Map<String, String> documentServiceClassNames = this.servicesManager.getDocumentServiceClassNames();
        servletContext.setAttribute(DOCUMENT_SERVICES_CONTEXT_ATTRIBUTE, documentServiceClassNames);
    }

    /**
     * @param context
     *            the servlet context
     * @return map of protocol services with context path as key. This map has
     *         been constructed during startup of the eID DSS service.
     */
    @SuppressWarnings("unchecked")
    public static Map<String, String> getProtocolServiceClassNames(ServletContext context) {
        return (Map<String, String>) context.getAttribute(PROTOCOL_SERVICES_CONTEXT_ATTRIBUTE);
    }

    /**
     * @param context
     *            the servlet context
     * @return map of document service with content type as key. This map has
     *         been constructed during startup of the eID DSS service.
     */
    @SuppressWarnings("unchecked")
    public static Map<String, String> getDocumentServiceClassNames(ServletContext context) {
        return (Map<String, String>) context.getAttribute(DOCUMENT_SERVICES_CONTEXT_ATTRIBUTE);
    }
}