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lguerin |
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package org.objectweb.telosys.common;
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import java.util.Properties;
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import javax.servlet.ServletContext;
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import javax.servlet.ServletContextEvent;
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import javax.servlet.ServletContextListener;
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import org.objectweb.telosys.dal.tools.ConnectionPoolThread;
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import org.objectweb.telosys.screen.env.ScreenApplication;
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import org.objectweb.telosys.screen.env.ScreenApplicationManager;
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import org.objectweb.telosys.util.StrUtil;
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/**
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*
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* @author Laurent GUERIN
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*
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*/
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public abstract class TelosysContextListener implements ServletContextListener {
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private static final String SEPARATOR1 = "===========================================================================";
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private static final String SEPARATOR2 = "---------------------------------------------------------------------------";
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private static final TelosysClassLogger log = new TelosysClassLogger(TelosysContextListener.class);
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private ConnectionPoolThread _connectionPoolThread = null ;
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/**
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* Constructs a ServletContextListener dedicated to a Telosys web application
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*/
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public TelosysContextListener()
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{
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super();
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log.info("Context listener instance created.");
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}
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/**
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* First initialization step : Telosys initialization
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* @param servletContext
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* @param screenApplication
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*/
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public abstract void initTelosys(ServletContext servletContext, ScreenApplication screenApplication);
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/**
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* Second initialization step : Application initialization
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* @param servletContext
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* @param screenApplication
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*/
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public abstract void initApplication(ServletContext servletContext, ScreenApplication screenApplication);
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/* (non-Javadoc)
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* @see javax.servlet.http.HttpSessionListener#sessionCreated(javax.servlet.http.HttpSessionEvent)
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*/
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public void contextInitialized(ServletContextEvent event)
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{
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log.trace("context initialized");
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ServletContext servletContext = event.getServletContext();
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info(SEPARATOR1);
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info("Application start-up ...");
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info(SEPARATOR1);
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//--- STEP 1 : TELOSYS STARTUP
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infoStep(1);
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Telosys.startup(servletContext);
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printContextInfo(servletContext);
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info(SEPARATOR2);
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printTelosysInfo();
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info(SEPARATOR2);
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//--- STEP 2 : CHECK SCREEN APPLICATION OBJECT
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infoStep(2);
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// ScreenApplication screenApplication = ScreenApplicationManager.openScreenApplication ( servletContext );
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// if ( screenApplication != null )
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// {
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// info("ScreenApplication instance created.");
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// }
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// else
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// {
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// error("Cannot open ScreenApplication !" );
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// }
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ScreenApplication screenApplication = ScreenApplicationManager.getScreenApplication();
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if ( screenApplication != null )
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{
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info("ScreenApplication ready.");
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}
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else
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{
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error("Cannot get ScreenApplication !" );
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}
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//--- STEP 3 : DELEGATE TELOSYS INITIALIZATION
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infoStep(3);
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info("Telosys initialization ...");
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try {
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initTelosys(servletContext, screenApplication);
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} catch (Exception e)
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{
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//error("Exception in initialization ! ");
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error("Exception = " + e.toString() + " - Message = " + e.getMessage());
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e.printStackTrace();
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} catch (Throwable t)
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{
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//error("Throwable exception in initialization ! ");
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error("Throwable exception = " + t.toString() + " - Message = " + t.getMessage());
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t.printStackTrace();
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}
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info(SEPARATOR2);
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printTelosysConfig();
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info(SEPARATOR2);
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//--- STEP 4 : DELEGATE APPLICATION INITIALIZATION
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infoStep(4);
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info("Application initialization ...");
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try {
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initApplication(servletContext, screenApplication);
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} catch (Exception e)
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{
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//error("Exception in initialization ! ");
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error("Exception = " + e.toString() + " - Message = " + e.getMessage());
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e.printStackTrace();
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} catch (Throwable t)
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{
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//error("Throwable exception in initialization ! ");
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error("Throwable exception = " + t.toString() + " - Message = " + t.getMessage());
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t.printStackTrace();
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}
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//--- STEP 5 : CONNECTION POOL THREAD MANAGEMENT
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infoStep(5);
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startConnectionPoolThread();
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info(SEPARATOR1);
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info("End of application start-up.");
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info(SEPARATOR1);
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}
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/* (non-Javadoc)
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* @see javax.servlet.http.HttpSessionListener#sessionDestroyed(javax.servlet.http.HttpSessionEvent)
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*/
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public void contextDestroyed(ServletContextEvent event)
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{
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info(SEPARATOR1);
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stopConnectionPoolThread() ;
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info(SEPARATOR1);
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// TODO : Stop ConnectionPoolThread
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info("Context destroyed.");
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info(SEPARATOR1);
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}
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//-----------------------------------------------------------------------------
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/**
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* Print the step message
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* @param step
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*/
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public void infoStep(int step)
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{
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info("========== STEP " + step + " ...");
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}
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//-----------------------------------------------------------------------------
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/**
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* Print a standard info message, using the active loggers
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* @param s
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*/
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public void info(String s)
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{
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Telosys.info(this.getClass().getName(), s);
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}
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//-----------------------------------------------------------------------------
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/**
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* Print a standard error message, using the active loggers
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* @param sMsg
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*/
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public void error(String sMsg)
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{
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Telosys.error(this.getClass().getName(), sMsg);
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}
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//-----------------------------------------------------------------------------
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// private void printSeparator()
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// {
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// info(SEPARATOR);
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// }
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//-----------------------------------------------------------------------------
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private void printContextInfo(ServletContext context)
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{
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if (context != null)
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{
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info("ServletContext : " );
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info(" . Server Info : " + context.getServerInfo());
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info(" . Version : " + context.getMajorVersion() + "." + context.getMinorVersion());
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info(" . Context Name : " + context.getServletContextName());
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info(" . Real Path : " + context.getRealPath(""));
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}
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else
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{
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//info("Context not found ! ");
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error("ServletContext is null !");
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}
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}
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//-----------------------------------------------------------------------------
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private void printTelosysInfo()
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{
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info("TELOSYS Version : " + Telosys.getVersion() );
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}
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//-----------------------------------------------------------------------------
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private void printTelosysConfig()
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{
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info("Telosys configuration");
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info(" . Web App Context Name : " + Telosys.getWebAppName() );
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info(" . Web App Root Directory : " + Telosys.getWebAppRootDir() );
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//info(" . Configuration directory = " + Telosys.getConfigDirectory());
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//info(" . transform('./myfile.txt') = " + Telosys.transformFileName("./myfile.txt"));
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//info(" . transform('$ROOT/myfile.txt') = " + Telosys.transformFileName("$ROOT/myfile.txt"));
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//info(" . Properties file name = " + Telosys.getPropertiesFile());
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info(" . SAX parser class : " + Telosys.getSAXParserClassName() );
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info(" . Authentication required : " + Telosys.isAuthenticationRequired() ) ;
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info(" . Factory : " + ( Telosys.getFactory() != null ? "ready" : "not set !" ) ) ;
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}
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//-----------------------------------------------------------------------------
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/**
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* Starts the Connection Pool Thread if necessary <br>
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* ( if there's a property set in telosys.properties )
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*
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* @since v 1.0.2
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*/
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private void startConnectionPoolThread()
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{
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info("Start ConnectionPoolThread management ...");
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int iSleepDuration = -1 ;
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Properties prop = Telosys.getProperties();
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if ( prop != null )
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{
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String sSleepDuration = prop.getProperty("ConnectionPoolThread.sleepDuration");
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if ( sSleepDuration != null )
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{
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iSleepDuration = StrUtil.getInt(sSleepDuration, -1);
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}
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if ( iSleepDuration > 0 )
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{
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if ( iSleepDuration < 600 ) // Less than 10 minutes is not acceptable
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{
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info("Duration property increased to 600 seconds ( original value = " + iSleepDuration + " )");
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iSleepDuration = 600 ;
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}
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try
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{
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ConnectionPoolThread thread = new ConnectionPoolThread(iSleepDuration);
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thread.start();
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info("Thread " + thread.toString() + " started : sleep duration = " + iSleepDuration );
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_connectionPoolThread = thread ;
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} catch (Throwable t)
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{
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error("Exception : " + t.toString() + " - Message = " + t.getMessage());
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t.printStackTrace();
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}
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}
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else
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{
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info("No property for ConnectionPoolThread => thread not started.");
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}
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}
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else
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{
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info("Telosys properties not loaded => thread not started.");
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}
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}
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private void stopConnectionPoolThread()
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{
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if ( _connectionPoolThread != null )
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{
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info("Stop ConnectionPoolThread management ...");
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_connectionPoolThread.interrupt();
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}
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else
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{
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info("No ConnectionPoolThread to stop.");
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}
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}
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}
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telosys