Examples with WebappClassLoaderBase org.apache.catalina.loader.WebappClassLoaderBase used on opensource projects

Example 1 with WebappClassLoaderBase

use of org.apache.catalina.loader.WebappClassLoaderBase in project tomcat by apache.

the class StandardContext method startInternal.

/**
 * Start this component and implement the requirements
 * of {@link org.apache.catalina.util.LifecycleBase#startInternal()}.
 *
 * @exception LifecycleException if this component detects a fatal error
 *  that prevents this component from being used
 */
@Override
protected synchronized void startInternal() throws LifecycleException {
    if (log.isDebugEnabled()) {
        log.debug("Starting " + getBaseName());
    }
    // Send j2ee.state.starting notification
    if (this.getObjectName() != null) {
        Notification notification = new Notification("j2ee.state.starting", this.getObjectName(), sequenceNumber.getAndIncrement());
        broadcaster.sendNotification(notification);
    }
    setConfigured(false);
    boolean ok = true;
    // ensure the NamingResources follows the correct lifecycle
    if (namingResources != null) {
        namingResources.start();
    }
    // Post work directory
    postWorkDirectory();
    // Add missing components as necessary
    if (getResources() == null) {
        // (1) Required by Loader
        if (log.isDebugEnabled()) {
            log.debug("Configuring default Resources");
        }
        try {
            setResources(new StandardRoot(this));
        } catch (IllegalArgumentException e) {
            log.error(sm.getString("standardContext.resourcesInit"), e);
            ok = false;
        }
    }
    if (ok) {
        resourcesStart();
    }
    if (getLoader() == null) {
        WebappLoader webappLoader = new WebappLoader();
        webappLoader.setDelegate(getDelegate());
        setLoader(webappLoader);
    }
    // An explicit cookie processor hasn't been specified; use the default
    if (cookieProcessor == null) {
        cookieProcessor = new Rfc6265CookieProcessor();
    }
    // Initialize character set mapper
    getCharsetMapper();
    // Reading the "catalina.useNaming" environment variable
    String useNamingProperty = System.getProperty("catalina.useNaming");
    if ((useNamingProperty != null) && (useNamingProperty.equals("false"))) {
        useNaming = false;
    }
    if (ok && isUseNaming()) {
        if (getNamingContextListener() == null) {
            NamingContextListener ncl = new NamingContextListener();
            ncl.setName(getNamingContextName());
            ncl.setExceptionOnFailedWrite(getJndiExceptionOnFailedWrite());
            addLifecycleListener(ncl);
            setNamingContextListener(ncl);
        }
    }
    // Standard container startup
    if (log.isDebugEnabled()) {
        log.debug("Processing standard container startup");
    }
    // Binding thread
    ClassLoader oldCCL = bindThread();
    try {
        if (ok) {
            // Start our subordinate components, if any
            Loader loader = getLoader();
            if (loader instanceof Lifecycle) {
                ((Lifecycle) loader).start();
            }
            // created.
            if (loader.getClassLoader() instanceof WebappClassLoaderBase) {
                WebappClassLoaderBase cl = (WebappClassLoaderBase) loader.getClassLoader();
                cl.setClearReferencesRmiTargets(getClearReferencesRmiTargets());
                cl.setClearReferencesStopThreads(getClearReferencesStopThreads());
                cl.setClearReferencesStopTimerThreads(getClearReferencesStopTimerThreads());
                cl.setClearReferencesHttpClientKeepAliveThread(getClearReferencesHttpClientKeepAliveThread());
                cl.setClearReferencesObjectStreamClassCaches(getClearReferencesObjectStreamClassCaches());
                cl.setClearReferencesThreadLocals(getClearReferencesThreadLocals());
            }
            // By calling unbindThread and bindThread in a row, we setup the
            // current Thread CCL to be the webapp classloader
            unbindThread(oldCCL);
            oldCCL = bindThread();
            // Initialize logger again. Other components might have used it
            // too early, so it should be reset.
            logger = null;
            getLogger();
            Realm realm = getRealmInternal();
            if (null != realm) {
                if (realm instanceof Lifecycle) {
                    ((Lifecycle) realm).start();
                }
                // Place the CredentialHandler into the ServletContext so
                // applications can have access to it. Wrap it in a "safe"
                // handler so application's can't modify it.
                CredentialHandler safeHandler = new CredentialHandler() {

                    @Override
                    public boolean matches(String inputCredentials, String storedCredentials) {
                        return getRealmInternal().getCredentialHandler().matches(inputCredentials, storedCredentials);
                    }

                    @Override
                    public String mutate(String inputCredentials) {
                        return getRealmInternal().getCredentialHandler().mutate(inputCredentials);
                    }
                };
                context.setAttribute(Globals.CREDENTIAL_HANDLER, safeHandler);
            }
            // Notify our interested LifecycleListeners
            fireLifecycleEvent(Lifecycle.CONFIGURE_START_EVENT, null);
            // Start our child containers, if not already started
            for (Container child : findChildren()) {
                if (!child.getState().isAvailable()) {
                    child.start();
                }
            }
            // if any
            if (pipeline instanceof Lifecycle) {
                ((Lifecycle) pipeline).start();
            }
            // Acquire clustered manager
            Manager contextManager = null;
            Manager manager = getManager();
            if (manager == null) {
                if (log.isDebugEnabled()) {
                    log.debug(sm.getString("standardContext.cluster.noManager", Boolean.valueOf((getCluster() != null)), Boolean.valueOf(distributable)));
                }
                if ((getCluster() != null) && distributable) {
                    try {
                        contextManager = getCluster().createManager(getName());
                    } catch (Exception ex) {
                        log.error(sm.getString("standardContext.cluster.managerError"), ex);
                        ok = false;
                    }
                } else {
                    contextManager = new StandardManager();
                }
            }
            // Configure default manager if none was specified
            if (contextManager != null) {
                if (log.isDebugEnabled()) {
                    log.debug(sm.getString("standardContext.manager", contextManager.getClass().getName()));
                }
                setManager(contextManager);
            }
            if (manager != null && (getCluster() != null) && distributable) {
                // let the cluster know that there is a context that is distributable
                // and that it has its own manager
                getCluster().registerManager(manager);
            }
        }
        if (!getConfigured()) {
            log.error(sm.getString("standardContext.configurationFail"));
            ok = false;
        }
        // We put the resources into the servlet context
        if (ok) {
            getServletContext().setAttribute(Globals.RESOURCES_ATTR, getResources());
            if (getInstanceManager() == null) {
                setInstanceManager(createInstanceManager());
            }
            getServletContext().setAttribute(InstanceManager.class.getName(), getInstanceManager());
            InstanceManagerBindings.bind(getLoader().getClassLoader(), getInstanceManager());
            // Create context attributes that will be required
            getServletContext().setAttribute(JarScanner.class.getName(), getJarScanner());
            // Make the version info available
            getServletContext().setAttribute(Globals.WEBAPP_VERSION, getWebappVersion());
        }
        // Set up the context init params
        mergeParameters();
        // Call ServletContainerInitializers
        for (Map.Entry<ServletContainerInitializer, Set<Class<?>>> entry : initializers.entrySet()) {
            try {
                entry.getKey().onStartup(entry.getValue(), getServletContext());
            } catch (ServletException e) {
                log.error(sm.getString("standardContext.sciFail"), e);
                ok = false;
                break;
            }
        }
        // Configure and call application event listeners
        if (ok) {
            if (!listenerStart()) {
                log.error(sm.getString("standardContext.listenerFail"));
                ok = false;
            }
        }
        // change constraints
        if (ok) {
            checkConstraintsForUncoveredMethods(findConstraints());
        }
        try {
            // Start manager
            Manager manager = getManager();
            if (manager instanceof Lifecycle) {
                ((Lifecycle) manager).start();
            }
        } catch (Exception e) {
            log.error(sm.getString("standardContext.managerFail"), e);
            ok = false;
        }
        // Configure and call application filters
        if (ok) {
            if (!filterStart()) {
                log.error(sm.getString("standardContext.filterFail"));
                ok = false;
            }
        }
        // Load and initialize all "load on startup" servlets
        if (ok) {
            if (!loadOnStartup(findChildren())) {
                log.error(sm.getString("standardContext.servletFail"));
                ok = false;
            }
        }
        // Start ContainerBackgroundProcessor thread
        super.threadStart();
    } finally {
        // Unbinding thread
        unbindThread(oldCCL);
    }
    // Set available status depending upon startup success
    if (ok) {
        if (log.isDebugEnabled()) {
            log.debug("Starting completed");
        }
    } else {
        log.error(sm.getString("standardContext.startFailed", getName()));
    }
    startTime = System.currentTimeMillis();
    // Send j2ee.state.running notification
    if (ok && (this.getObjectName() != null)) {
        Notification notification = new Notification("j2ee.state.running", this.getObjectName(), sequenceNumber.getAndIncrement());
        broadcaster.sendNotification(notification);
    }
    // The WebResources implementation caches references to JAR files. On
    // some platforms these references may lock the JAR files. Since web
    // application start is likely to have read from lots of JARs, trigger
    // a clean-up now.
    getResources().gc();
    // Reinitializing if something went wrong
    if (!ok) {
        setState(LifecycleState.FAILED);
        // Send j2ee.object.failed notification
        if (this.getObjectName() != null) {
            Notification notification = new Notification("j2ee.object.failed", this.getObjectName(), sequenceNumber.getAndIncrement());
            broadcaster.sendNotification(notification);
        }
    } else {
        setState(LifecycleState.STARTING);
    }
}