applicationlistener.java

来自「一个很好的开源项目管理系统源代码」· Java 代码 · 共 90 行

package net.java.workeffort.webapp.support;

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

import net.java.workeffort.service.IListOfValuesService;
import net.java.workeffort.webapp.security.RoleManager;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.web.context.ContextLoaderListener;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;


/**
 * The application Listener. This is configured in the web.xml file. It
 * initializes the spring context, initializes the security roles for the
 * application and primes the list of values data.
 * @author Antony Joseph
 */
public class ApplicationListener extends ContextLoaderListener implements
        ServletContextListener {

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

    public void contextInitialized(ServletContextEvent sce) {
        if (logger.isInfoEnabled()) {
            logger.info("Initializing context");
        }

        // initialize the spring context
        super.contextInitialized(sce);
        // initialize the application.
        initializeApplication(sce.getServletContext());
    }

    public void initializeApplication(ServletContext servletContext) {
        WebApplicationContext wac = WebApplicationContextUtils
                .getRequiredWebApplicationContext(servletContext);

        // load all roles and corresponding permissions
        RoleManager roleManager = (RoleManager) wac.getBean("roleManager");
        roleManager.initialize();

        // Store the list of values service in application scope.
        IListOfValuesService lovService = (IListOfValuesService) wac
                .getBean("listOfValuesService");
        primeListOfValues(lovService);

        logger.info("Application initialization successful.");

    }

    /**
     * Even if we don't prime the list of values, the system will work because
     * the caching scheme will cache the lovs as they are accessed.
     * @param lovService The lov service
     */
    private  void primeListOfValues(IListOfValuesService lovService) {
        lovService.getCachedRequirementTypeLov();
        lovService.getCachedWorkTypeLov();
        lovService.getCachedWorkStatusLov();
        lovService.getCachedWorkPurposeTypeLov();
        lovService.getCachedWorkAssociationTypeLov();
        lovService.getCachedWorkRoleLov();
        lovService.getCachedWorkFxdastAsgnStatusLov();
        lovService.getCachedPartTypeLov();
        lovService.getCachedFixedAssetTypeLov();
        lovService.getCachedSkillTypeLov();
        lovService.getCachedDeliverableTypeLov();
        lovService.getCachedPartStatusLov();
        lovService.getCachedPartyTypeLov();
        lovService.getCachedFacilityTypeLov();
        lovService.getCachedTargetTypeLov();
        lovService.getCachedRateTypeLov();
        lovService.getCachedCurrencyLov();
        lovService.getCachedYesNoLov();
        lovService.getCachedTimesheetApprovalLov();
        lovService.getCachedDeliverableLov();
        lovService.getCachedFixedAssetLov();
        lovService.getCachedProductLov();
        lovService.getCachedFacilityLov();
        lovService.getCachedSkillLov();
        lovService.getCachedRoleLov();
    }
}