core/src/main/java/flex/messaging/MessageBrokerServlet.java - flex-blazeds - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.
  * The ASF licenses this file to You under the Apache License, Version 2.0
  * (the "License"); you may not use this file except in compliance with
  * the License.  You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 package flex.messaging;

 import flex.management.MBeanLifecycleManager;
 import flex.management.MBeanServerLocatorFactory;
 import flex.messaging.config.ConfigurationManager;
 import flex.messaging.config.FlexConfigurationManager;
 import flex.messaging.config.MessagingConfiguration;
 import flex.messaging.endpoints.Endpoint;
 import flex.messaging.io.SerializationContext;
 import flex.messaging.io.TypeMarshallingContext;
 import flex.messaging.log.HTTPRequestLog;
 import flex.messaging.log.Log;
 import flex.messaging.log.LogCategories;
 import flex.messaging.log.Logger;
 import flex.messaging.log.LoggingHttpServletRequestWrapper;
 import flex.messaging.log.ServletLogTarget;
 import flex.messaging.services.AuthenticationService;
 import flex.messaging.util.ClassUtil;
 import flex.messaging.util.ExceptionUtil;
 import flex.messaging.util.Trace;

 import javax.servlet.ServletConfig;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.security.Principal;
 import java.util.concurrent.ConcurrentHashMap;

 /**
  * The MessageBrokerServlet bootstraps the MessageBroker,
  * adds endpoints to it, and starts the broker. The servlet
  * also acts as a facade for all http-based endpoints, in that
  * the servlet receives the http request and then delegates to
  * an endpoint that can handle the request's content type. This
  * does not occur for non-http endpoints, such as the rtmp endpoint.
  *
  * @see flex.messaging.MessageBroker
  */
 public class MessageBrokerServlet extends HttpServlet {
     static final long serialVersionUID = -5293855229461612246L;

     public static final String LOG_CATEGORY_STARTUP_BROKER = LogCategories.STARTUP_MESSAGEBROKER;
     private static final String STRING_UNDEFINED_APPLICATION = "undefined";

     private MessageBroker broker;
     private HttpFlexSessionProvider httpFlexSessionProvider;
     private static String FLEXDIR = "/WEB-INF/flex/";
     private boolean log_errors = false;

     /**
      * Initializes the servlet in its web container, then creates
      * the MessageBroker and adds Endpoints and Services to that broker.
      * This servlet may keep a reference to an endpoint if it needs to
      * delegate to it in the <code>service</code> method.
      */
     public void init(ServletConfig servletConfig) throws ServletException {
         super.init(servletConfig);

         // allocate thread local variables
         createThreadLocals();

         // Set the servlet config as thread local
         FlexContext.setThreadLocalObjects(null, null, null, null, null, servletConfig);

         ServletLogTarget.setServletContext(servletConfig.getServletContext());

         ClassLoader loader = getClassLoader();

         if ("true".equals(servletConfig.getInitParameter("useContextClassLoader"))) {
             loader = Thread.currentThread().getContextClassLoader();
         }

         // Should we wrap http request for later error logging?
         log_errors = HTTPRequestLog.init(getServletContext());

         // Start the broker
         try {
             // Get the configuration manager
             ConfigurationManager configManager = loadMessagingConfiguration(servletConfig);

             // Load configuration
             MessagingConfiguration config = configManager.getMessagingConfiguration(servletConfig);

             // Set up logging system ahead of everything else.
             config.createLogAndTargets();

             // Create broker.
             broker = config.createBroker(servletConfig.getInitParameter("messageBrokerId"), loader);

             // Set the servlet config as thread local
             FlexContext.setThreadLocalObjects(null, null, broker, null, null, servletConfig);

             setupPathResolvers();

             // Set initial servlet context on broker
             broker.setServletContext(servletConfig.getServletContext());

             Logger logger = Log.getLogger(ConfigurationManager.LOG_CATEGORY);
             if (Log.isInfo()) {
                 logger.info(VersionInfo.buildMessage());
             }

             // Create endpoints, services, security, and logger on the broker based on configuration
             config.configureBroker(broker);

             long timeBeforeStartup = 0;
             if (Log.isDebug()) {
                 timeBeforeStartup = System.currentTimeMillis();
                 Log.getLogger(LOG_CATEGORY_STARTUP_BROKER).debug("MessageBroker with id '{0}' is starting.",
                         new Object[]{broker.getId()});
             }

             //initialize the httpSessionToFlexSessionMap
             synchronized (HttpFlexSession.mapLock) {
                 if (servletConfig.getServletContext().getAttribute(HttpFlexSession.SESSION_MAP) == null)
                     servletConfig.getServletContext().setAttribute(HttpFlexSession.SESSION_MAP, new ConcurrentHashMap());
             }

             broker.start();

             if (Log.isDebug()) {
                 long timeAfterStartup = System.currentTimeMillis();
                 Long diffMillis = timeAfterStartup - timeBeforeStartup;
                 Log.getLogger(LOG_CATEGORY_STARTUP_BROKER).debug("MessageBroker with id '{0}' is ready (startup time: '{1}' ms)",
                         new Object[]{broker.getId(), diffMillis});
             }

             // Report replaced tokens
             configManager.reportTokens();

             // Report any unused properties.
             config.reportUnusedProperties();

             // Setup provider for FlexSessions that wrap underlying J2EE HttpSessions.
             httpFlexSessionProvider = new HttpFlexSessionProvider();
             broker.getFlexSessionManager().registerFlexSessionProvider(HttpFlexSession.class, httpFlexSessionProvider);

             // clear the broker and servlet config as this thread is done
             FlexContext.clearThreadLocalObjects();
         } catch (Throwable t) {
             // On any unhandled exception destroy the broker, log it and rethrow.
             String applicationName = servletConfig.getServletContext().getServletContextName();
             if (applicationName == null)
                 applicationName = STRING_UNDEFINED_APPLICATION;

             System.err.println("**** MessageBrokerServlet in application '" + applicationName
                     + "' failed to initialize due to runtime exception: "
                     + ExceptionUtil.exceptionFollowedByRootCausesToString(t));
             destroy();
             // We used to throw  UnavailableException, but Weblogic didn't mark the webapp as failed. See bug FBR-237
             throw new ServletException(t);
         }
     }

     private void setupPathResolvers() {
         setupExternalPathResolver();
         setupInternalPathResolver();
     }

     private void setupExternalPathResolver() {
         broker.setExternalPathResolver(
                 new MessageBroker.PathResolver() {
                     public InputStream resolve(String filename) throws FileNotFoundException {
                         return new FileInputStream(new File(filename));
                     }
                 }
         );
     }

     private void setupInternalPathResolver() {
         broker.setInternalPathResolver(
                 new MessageBroker.InternalPathResolver() {
                     public InputStream resolve(String filename) {
                         return getServletContext().getResourceAsStream(FLEXDIR + filename);
                     }
                 }
         );
     }

     private static ConfigurationManager loadMessagingConfiguration(ServletConfig servletConfig) {
         ConfigurationManager manager = null;
         Class managerClass;
         String className;

         // Check for Custom Configuration Manager Specification
         if (servletConfig != null) {
             String p = servletConfig.getInitParameter("services.configuration.manager");
             if (p != null) {
                 className = p.trim();
                 try {
                     managerClass = ClassUtil.createClass(className);
                     manager = (ConfigurationManager) managerClass.newInstance();
                 } catch (Throwable t) {
                     if (Trace.config) // Log is not initialized yet.
                         Trace.trace("Could not load configuration manager as: " + className);
                 }
             }
         }

         if (manager == null) {
             manager = new FlexConfigurationManager();
         }

         return manager;
     }

     /**
      * Stops all endpoints in the MessageBroker, giving them a chance
      * to perform any endpoint-specific clean up.
      */
     public void destroy() {
         if (broker != null) {
             broker.stop();
             if (broker.isManaged()) {
                 MBeanLifecycleManager.unregisterRuntimeMBeans(broker);
             }
             // release static thread locals
             destroyThreadLocals();
         }
     }

     /**
      * Handle an incoming request, and delegate to an endpoint based on
      * content type, if appropriate. The content type mappings for endpoints
      * are not externally configurable, and currently the AmfEndpoint
      * is the only delegate.
      */
     public void service(HttpServletRequest req, HttpServletResponse res) {
         if (log_errors) {
             // Create a wrapper for the request object so we can save the body content
             LoggingHttpServletRequestWrapper wrapper = new LoggingHttpServletRequestWrapper(req);
             req = wrapper;

             try {
                 // Read the body content
                 wrapper.doReadBody();
             } catch (IOException ignore) {
                 // ignore, the wrapper will preserve what content we were able to read.
             }
         }

         try {
             // Update thread locals
             broker.initThreadLocals();
             // Set this first so it is in place for the session creation event.  The
             // current session is set by the FlexSession stuff right when it is available.
             // The threadlocal FlexClient is set up during message deserialization in the
             // MessageBrokerFilter.
             FlexContext.setThreadLocalObjects(null, null, broker, req, res, getServletConfig());

             HttpFlexSession fs = httpFlexSessionProvider.getOrCreateSession(req);
             Principal principal;
             if (FlexContext.isPerClientAuthentication()) {
                 principal = FlexContext.getUserPrincipal();
             } else {
                 principal = fs.getUserPrincipal();
             }

             if (principal == null && req.getHeader("Authorization") != null) {
                 String encoded = req.getHeader("Authorization");
                 if (encoded.indexOf("Basic") > -1) {
                     encoded = encoded.substring(6); //Basic.length()+1
                     try {
                         ((AuthenticationService) broker.getService(AuthenticationService.ID)).decodeAndLogin(encoded, broker.getLoginManager());
                     } catch (Exception e) {
                         if (Log.isDebug())
                             Log.getLogger(LogCategories.SECURITY).info("Authentication service could not decode and login: " + e.getMessage());
                     }
                 }
             }

             String contextPath = req.getContextPath();
             String pathInfo = req.getPathInfo();
             String endpointPath = req.getServletPath();
             if (pathInfo != null)
                 endpointPath = endpointPath + pathInfo;

             Endpoint endpoint;
             try {
                 endpoint = broker.getEndpoint(endpointPath, contextPath);
             } catch (MessageException me) {
                 if (Log.isInfo())
                     Log.getLogger(LogCategories.ENDPOINT_GENERAL).info("Received invalid request for endpoint path '{0}'.", new Object[]{endpointPath});

                 if (!res.isCommitted()) {
                     try {
                         res.sendError(HttpServletResponse.SC_NOT_FOUND);
                     } catch (IOException ignore) {
                     }
                 }

                 return;
             }

             try {
                 if (Log.isInfo()) {
                     Log.getLogger(LogCategories.ENDPOINT_GENERAL).info("Channel endpoint {0} received request.",
                             new Object[]{endpoint.getId()});
                 }
                 endpoint.service(req, res);
             } catch (UnsupportedOperationException ue) {
                 if (Log.isInfo()) {
                     Log.getLogger(LogCategories.ENDPOINT_GENERAL).info("Channel endpoint {0} received request for an unsupported operation.",
                             new Object[]{endpoint.getId()},
                             ue);
                 }

                 if (!res.isCommitted()) {
                     try {
                         res.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED);
                     } catch (IOException ignore) {
                     }
                 }
             }
         } catch (Throwable t) {
             // Final resort catch block as recommended by Fortify as a potential System info leak
             try {
                 Log.getLogger(LogCategories.ENDPOINT_GENERAL).error("Unexpected error encountered in Message Broker servlet", t);
                 res.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
             } catch (IOException ignore) {
                 // ignore
             }

         } finally {
             if (log_errors) {
                 String info = (String) req.getAttribute(HTTPRequestLog.HTTP_ERROR_INFO);
                 if (info != null) {
                     // Log the HttpRequest data
                     System.out.println("Exception occurred while processing HTTP request: " + info + ", request details logged in " + HTTPRequestLog.getFileName());
                     HTTPRequestLog.outputRequest(info, req);
                 }
             }

             FlexContext.clearThreadLocalObjects();
         }
     }

     /**
      * Hook for subclasses to override the class loader to use for loading user defined classes.
      *
      * @return the class loader for this class
      */
     protected ClassLoader getClassLoader() {
         return this.getClass().getClassLoader();
     }


     // Call ONLY on servlet startup
     public static void createThreadLocals() {
         // allocate static thread local objects
         FlexContext.createThreadLocalObjects();
         SerializationContext.createThreadLocalObjects();
         TypeMarshallingContext.createThreadLocalObjects();
     }


     // Call ONLY on servlet shutdown
     protected static void destroyThreadLocals() {
         // clear static member variables
         Log.clear();
         MBeanServerLocatorFactory.clear();

         // Destroy static thread local objects
         FlexContext.releaseThreadLocalObjects();
         SerializationContext.releaseThreadLocalObjects();
         TypeMarshallingContext.releaseThreadLocalObjects();
     }

 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one or more
	* contributor license agreements. See the NOTICE file distributed with
	* this work for additional information regarding copyright ownership.
	* The ASF licenses this file to You under the Apache License, Version 2.0
	* (the "License"); you may not use this file except in compliance with
	* the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/
	package flex.messaging;

	import flex.management.MBeanLifecycleManager;
	import flex.management.MBeanServerLocatorFactory;
	import flex.messaging.config.ConfigurationManager;
	import flex.messaging.config.FlexConfigurationManager;
	import flex.messaging.config.MessagingConfiguration;
	import flex.messaging.endpoints.Endpoint;
	import flex.messaging.io.SerializationContext;
	import flex.messaging.io.TypeMarshallingContext;
	import flex.messaging.log.HTTPRequestLog;
	import flex.messaging.log.Log;
	import flex.messaging.log.LogCategories;
	import flex.messaging.log.Logger;
	import flex.messaging.log.LoggingHttpServletRequestWrapper;
	import flex.messaging.log.ServletLogTarget;
	import flex.messaging.services.AuthenticationService;
	import flex.messaging.util.ClassUtil;
	import flex.messaging.util.ExceptionUtil;
	import flex.messaging.util.Trace;

	import javax.servlet.ServletConfig;
	import javax.servlet.ServletException;
	import javax.servlet.http.HttpServlet;
	import javax.servlet.http.HttpServletRequest;
	import javax.servlet.http.HttpServletResponse;

	import java.io.File;
	import java.io.FileInputStream;
	import java.io.FileNotFoundException;
	import java.io.IOException;
	import java.io.InputStream;
	import java.security.Principal;
	import java.util.concurrent.ConcurrentHashMap;

	/**
	* The MessageBrokerServlet bootstraps the MessageBroker,
	* adds endpoints to it, and starts the broker. The servlet
	* also acts as a facade for all http-based endpoints, in that
	* the servlet receives the http request and then delegates to
	* an endpoint that can handle the request's content type. This
	* does not occur for non-http endpoints, such as the rtmp endpoint.
	*
	* @see flex.messaging.MessageBroker
	*/
	public class MessageBrokerServlet extends HttpServlet {
	static final long serialVersionUID = -5293855229461612246L;

	public static final String LOG_CATEGORY_STARTUP_BROKER = LogCategories.STARTUP_MESSAGEBROKER;
	private static final String STRING_UNDEFINED_APPLICATION = "undefined";

	private MessageBroker broker;
	private HttpFlexSessionProvider httpFlexSessionProvider;
	private static String FLEXDIR = "/WEB-INF/flex/";
	private boolean log_errors = false;

	/**
	* Initializes the servlet in its web container, then creates
	* the MessageBroker and adds Endpoints and Services to that broker.
	* This servlet may keep a reference to an endpoint if it needs to
	* delegate to it in the <code>service</code> method.
	*/
	public void init(ServletConfig servletConfig) throws ServletException {
	super.init(servletConfig);

	// allocate thread local variables
	createThreadLocals();

	// Set the servlet config as thread local
	FlexContext.setThreadLocalObjects(null, null, null, null, null, servletConfig);

	ServletLogTarget.setServletContext(servletConfig.getServletContext());

	ClassLoader loader = getClassLoader();

	if ("true".equals(servletConfig.getInitParameter("useContextClassLoader"))) {
	loader = Thread.currentThread().getContextClassLoader();
	}

	// Should we wrap http request for later error logging?
	log_errors = HTTPRequestLog.init(getServletContext());

	// Start the broker
	try {
	// Get the configuration manager
	ConfigurationManager configManager = loadMessagingConfiguration(servletConfig);

	// Load configuration
	MessagingConfiguration config = configManager.getMessagingConfiguration(servletConfig);

	// Set up logging system ahead of everything else.
	config.createLogAndTargets();

	// Create broker.
	broker = config.createBroker(servletConfig.getInitParameter("messageBrokerId"), loader);

	// Set the servlet config as thread local
	FlexContext.setThreadLocalObjects(null, null, broker, null, null, servletConfig);

	setupPathResolvers();

	// Set initial servlet context on broker
	broker.setServletContext(servletConfig.getServletContext());

	Logger logger = Log.getLogger(ConfigurationManager.LOG_CATEGORY);
	if (Log.isInfo()) {
	logger.info(VersionInfo.buildMessage());
	}

	// Create endpoints, services, security, and logger on the broker based on configuration
	config.configureBroker(broker);

	long timeBeforeStartup = 0;
	if (Log.isDebug()) {
	timeBeforeStartup = System.currentTimeMillis();
	Log.getLogger(LOG_CATEGORY_STARTUP_BROKER).debug("MessageBroker with id '{0}' is starting.",
	new Object[]{broker.getId()});
	}

	//initialize the httpSessionToFlexSessionMap
	synchronized (HttpFlexSession.mapLock) {
	if (servletConfig.getServletContext().getAttribute(HttpFlexSession.SESSION_MAP) == null)
	servletConfig.getServletContext().setAttribute(HttpFlexSession.SESSION_MAP, new ConcurrentHashMap());
	}

	broker.start();

	if (Log.isDebug()) {
	long timeAfterStartup = System.currentTimeMillis();
	Long diffMillis = timeAfterStartup - timeBeforeStartup;
	Log.getLogger(LOG_CATEGORY_STARTUP_BROKER).debug("MessageBroker with id '{0}' is ready (startup time: '{1}' ms)",
	new Object[]{broker.getId(), diffMillis});
	}

	// Report replaced tokens
	configManager.reportTokens();

	// Report any unused properties.
	config.reportUnusedProperties();

	// Setup provider for FlexSessions that wrap underlying J2EE HttpSessions.
	httpFlexSessionProvider = new HttpFlexSessionProvider();
	broker.getFlexSessionManager().registerFlexSessionProvider(HttpFlexSession.class, httpFlexSessionProvider);

	// clear the broker and servlet config as this thread is done
	FlexContext.clearThreadLocalObjects();
	} catch (Throwable t) {
	// On any unhandled exception destroy the broker, log it and rethrow.
	String applicationName = servletConfig.getServletContext().getServletContextName();
	if (applicationName == null)
	applicationName = STRING_UNDEFINED_APPLICATION;

	System.err.println("**** MessageBrokerServlet in application '" + applicationName
	+ "' failed to initialize due to runtime exception: "
	+ ExceptionUtil.exceptionFollowedByRootCausesToString(t));
	destroy();
	// We used to throw UnavailableException, but Weblogic didn't mark the webapp as failed. See bug FBR-237
	throw new ServletException(t);
	}
	}

	private void setupPathResolvers() {
	setupExternalPathResolver();
	setupInternalPathResolver();
	}

	private void setupExternalPathResolver() {
	broker.setExternalPathResolver(
	new MessageBroker.PathResolver() {
	public InputStream resolve(String filename) throws FileNotFoundException {
	return new FileInputStream(new File(filename));
	}
	}
	);
	}

	private void setupInternalPathResolver() {
	broker.setInternalPathResolver(
	new MessageBroker.InternalPathResolver() {
	public InputStream resolve(String filename) {
	return getServletContext().getResourceAsStream(FLEXDIR + filename);
	}
	}
	);
	}

	private static ConfigurationManager loadMessagingConfiguration(ServletConfig servletConfig) {
	ConfigurationManager manager = null;
	Class managerClass;
	String className;

	// Check for Custom Configuration Manager Specification
	if (servletConfig != null) {
	String p = servletConfig.getInitParameter("services.configuration.manager");
	if (p != null) {
	className = p.trim();
	try {
	managerClass = ClassUtil.createClass(className);
	manager = (ConfigurationManager) managerClass.newInstance();
	} catch (Throwable t) {
	if (Trace.config) // Log is not initialized yet.
	Trace.trace("Could not load configuration manager as: " + className);
	}
	}
	}

	if (manager == null) {
	manager = new FlexConfigurationManager();
	}

	return manager;
	}

	/**
	* Stops all endpoints in the MessageBroker, giving them a chance
	* to perform any endpoint-specific clean up.
	*/
	public void destroy() {
	if (broker != null) {
	broker.stop();
	if (broker.isManaged()) {
	MBeanLifecycleManager.unregisterRuntimeMBeans(broker);
	}
	// release static thread locals
	destroyThreadLocals();
	}
	}

	/**
	* Handle an incoming request, and delegate to an endpoint based on
	* content type, if appropriate. The content type mappings for endpoints
	* are not externally configurable, and currently the AmfEndpoint
	* is the only delegate.
	*/
	public void service(HttpServletRequest req, HttpServletResponse res) {
	if (log_errors) {
	// Create a wrapper for the request object so we can save the body content
	LoggingHttpServletRequestWrapper wrapper = new LoggingHttpServletRequestWrapper(req);
	req = wrapper;

	try {
	// Read the body content
	wrapper.doReadBody();
	} catch (IOException ignore) {
	// ignore, the wrapper will preserve what content we were able to read.
	}
	}

	try {
	// Update thread locals
	broker.initThreadLocals();
	// Set this first so it is in place for the session creation event. The
	// current session is set by the FlexSession stuff right when it is available.
	// The threadlocal FlexClient is set up during message deserialization in the
	// MessageBrokerFilter.
	FlexContext.setThreadLocalObjects(null, null, broker, req, res, getServletConfig());

	HttpFlexSession fs = httpFlexSessionProvider.getOrCreateSession(req);
	Principal principal;
	if (FlexContext.isPerClientAuthentication()) {
	principal = FlexContext.getUserPrincipal();
	} else {
	principal = fs.getUserPrincipal();
	}

	if (principal == null && req.getHeader("Authorization") != null) {
	String encoded = req.getHeader("Authorization");
	if (encoded.indexOf("Basic") > -1) {
	encoded = encoded.substring(6); //Basic.length()+1
	try {
	((AuthenticationService) broker.getService(AuthenticationService.ID)).decodeAndLogin(encoded, broker.getLoginManager());
	} catch (Exception e) {
	if (Log.isDebug())
	Log.getLogger(LogCategories.SECURITY).info("Authentication service could not decode and login: " + e.getMessage());
	}
	}
	}

	String contextPath = req.getContextPath();
	String pathInfo = req.getPathInfo();
	String endpointPath = req.getServletPath();
	if (pathInfo != null)
	endpointPath = endpointPath + pathInfo;

	Endpoint endpoint;
	try {
	endpoint = broker.getEndpoint(endpointPath, contextPath);
	} catch (MessageException me) {
	if (Log.isInfo())
	Log.getLogger(LogCategories.ENDPOINT_GENERAL).info("Received invalid request for endpoint path '{0}'.", new Object[]{endpointPath});

	if (!res.isCommitted()) {
	try {
	res.sendError(HttpServletResponse.SC_NOT_FOUND);
	} catch (IOException ignore) {
	}
	}

	return;
	}

	try {
	if (Log.isInfo()) {
	Log.getLogger(LogCategories.ENDPOINT_GENERAL).info("Channel endpoint {0} received request.",
	new Object[]{endpoint.getId()});
	}
	endpoint.service(req, res);
	} catch (UnsupportedOperationException ue) {
	if (Log.isInfo()) {
	Log.getLogger(LogCategories.ENDPOINT_GENERAL).info("Channel endpoint {0} received request for an unsupported operation.",
	new Object[]{endpoint.getId()},
	ue);
	}

	if (!res.isCommitted()) {
	try {
	res.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED);
	} catch (IOException ignore) {
	}
	}
	}
	} catch (Throwable t) {
	// Final resort catch block as recommended by Fortify as a potential System info leak
	try {
	Log.getLogger(LogCategories.ENDPOINT_GENERAL).error("Unexpected error encountered in Message Broker servlet", t);
	res.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
	} catch (IOException ignore) {
	// ignore
	}

	} finally {
	if (log_errors) {
	String info = (String) req.getAttribute(HTTPRequestLog.HTTP_ERROR_INFO);
	if (info != null) {
	// Log the HttpRequest data
	System.out.println("Exception occurred while processing HTTP request: " + info + ", request details logged in " + HTTPRequestLog.getFileName());
	HTTPRequestLog.outputRequest(info, req);
	}
	}

	FlexContext.clearThreadLocalObjects();
	}
	}

	/**
	* Hook for subclasses to override the class loader to use for loading user defined classes.
	*
	* @return the class loader for this class
	*/
	protected ClassLoader getClassLoader() {
	return this.getClass().getClassLoader();
	}


	// Call ONLY on servlet startup
	public static void createThreadLocals() {
	// allocate static thread local objects
	FlexContext.createThreadLocalObjects();
	SerializationContext.createThreadLocalObjects();
	TypeMarshallingContext.createThreadLocalObjects();
	}


	// Call ONLY on servlet shutdown
	protected static void destroyThreadLocals() {
	// clear static member variables
	Log.clear();
	MBeanServerLocatorFactory.clear();

	// Destroy static thread local objects
	FlexContext.releaseThreadLocalObjects();
	SerializationContext.releaseThreadLocalObjects();
	TypeMarshallingContext.releaseThreadLocalObjects();
	}

	}