diff options
Diffstat (limited to 'sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/webapp/TuscanyRequestFilter.java')
-rw-r--r-- | sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/webapp/TuscanyRequestFilter.java | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/webapp/TuscanyRequestFilter.java b/sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/webapp/TuscanyRequestFilter.java new file mode 100644 index 0000000000..6637448204 --- /dev/null +++ b/sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/webapp/TuscanyRequestFilter.java @@ -0,0 +1,96 @@ +/** + * + * Copyright 2005 The Apache Software Foundation or its licensors, as applicable. + * + * Licensed 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 org.apache.tuscany.core.webapp; + +import org.apache.tuscany.core.context.CompositeContext; +import org.apache.tuscany.core.context.event.HttpSessionBound; +import org.apache.tuscany.core.context.event.RequestStart; +import org.apache.tuscany.core.context.event.RequestEnd; +import org.osoa.sca.CurrentModuleContext; +import org.osoa.sca.ModuleContext; + +import javax.servlet.http.HttpServletRequest; +import javax.servlet.Filter; +import javax.servlet.ServletContext; +import javax.servlet.ServletException; +import javax.servlet.FilterConfig; +import javax.servlet.ServletResponse; +import javax.servlet.FilterChain; +import javax.servlet.ServletRequest; +import java.io.IOException; + +/** + * Notifies the {@link org.apache.tuscany.core.context.CompositeContext} of web request start and end events as well as setting up the + * current session context. The latter is done using lazy Servlet-based session retrieval. The filter fires a session + * start event, passing a <tt>LazyServletSessionId</tt> as the session id. The <tt>LazyServletSessionId</tt> is a + * wrapper for the servlet request which may be called by the <tt>ModuleContext</tt> to retrieve the session id + * lazily. + * + * @version $Rev: 379957 $ $Date: 2006-02-22 14:58:24 -0800 (Wed, 22 Feb 2006) $ + */ +public class TuscanyRequestFilter implements Filter { + private CompositeContext moduleContext; + + public TuscanyRequestFilter() { + } + + public void init(FilterConfig filterConfig) throws ServletException { + ServletContext servletContext = filterConfig.getServletContext(); + moduleContext = (CompositeContext) servletContext.getAttribute(TuscanyServletListener.MODULE_COMPONENT_NAME); + } + + public void destroy() { + } + + public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws ServletException, IOException { + ModuleContext oldContext = CurrentModuleContext.getContext(); + try { + // Set the current module context + ContextBinder.BINDER.setContext((ModuleContext) moduleContext); + + // Handle a request + if (request instanceof HttpServletRequest) { + if (((HttpServletRequest) request).getSession(false) != null) { + + // A session is already active + moduleContext.publish(new HttpSessionBound(this, ((HttpServletRequest) request).getSession(true))); + } else { + // Create a lazy wrapper since a session is not yet active + moduleContext.publish(new HttpSessionBound(this, new LazyHTTPSessionId((HttpServletRequest) request))); + } + } else { + moduleContext.publish(new HttpSessionBound(this, request)); + } + // Start processing the request + moduleContext.publish(new RequestStart(this, request)); + // Dispatch to the next filter + filterChain.doFilter(request, response); + } catch (Exception e) { + throw new ServletException(e); + + } finally { + try { + // End processing the request + moduleContext.publish(new RequestEnd(this, request)); + } catch (Exception e) { + throw new ServletException(e); + } + ContextBinder.BINDER.setContext(oldContext); + } + } + +} |