diff options
Diffstat (limited to 'sca-java-1.x/tags/1.6/modules/node-launcher-osgi/src/main/java/org/apache/tuscany/sca/node/osgi/launcher/NodeServletFilter.java')
-rw-r--r-- | sca-java-1.x/tags/1.6/modules/node-launcher-osgi/src/main/java/org/apache/tuscany/sca/node/osgi/launcher/NodeServletFilter.java | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.6/modules/node-launcher-osgi/src/main/java/org/apache/tuscany/sca/node/osgi/launcher/NodeServletFilter.java b/sca-java-1.x/tags/1.6/modules/node-launcher-osgi/src/main/java/org/apache/tuscany/sca/node/osgi/launcher/NodeServletFilter.java new file mode 100644 index 0000000000..fcbe259dba --- /dev/null +++ b/sca-java-1.x/tags/1.6/modules/node-launcher-osgi/src/main/java/org/apache/tuscany/sca/node/osgi/launcher/NodeServletFilter.java @@ -0,0 +1,127 @@ +/* + * 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 org.apache.tuscany.sca.node.osgi.launcher; + +import java.io.IOException; +import java.util.logging.Level; +import java.util.logging.Logger; + +import javax.servlet.Filter; +import javax.servlet.FilterConfig; +import javax.servlet.ServletException; +import javax.servlet.ServletRequest; +import javax.servlet.ServletResponse; + +/** + * A Servlet filter that forwards service requests to the Servlets registered with + * the Tuscany ServletHost. + * + * @version $Rev$ $Date$ + */ +public class NodeServletFilter implements Filter { + private static final String NODE_WEB_APP_SERVLET_HOST = "org.apache.tuscany.sca.implementation.node.osgi.webapp.NodeWebAppServletHost"; + + private static final long serialVersionUID = 1L; + + private static final Logger logger = Logger.getLogger(NodeServletFilter.class.getName()); + + private ClassLoader runtimeClassLoader; + private Class<?> servletHostClass; + private Object servletHost; + private Filter filter; + + public void init(FilterConfig filterConfig) throws ServletException { + logger.info("Apache Tuscany SCA WebApp Node starting..."); + + try { + // Get the Tuscany runtime ClassLoader + ClassLoader tccl = Thread.currentThread().getContextClassLoader(); + + try { + if (runtimeClassLoader != null) { + Thread.currentThread().setContextClassLoader(runtimeClassLoader); + } + + // Load the Tuscany WebApp Servlet host and get the host instance + // for the current webapp + String className = NODE_WEB_APP_SERVLET_HOST; + if (runtimeClassLoader != null) { + servletHostClass = Class.forName(className, true, runtimeClassLoader); + } else { + servletHostClass = Class.forName(className); + } + servletHost = servletHostClass.getMethod("servletHost").invoke(null); + + // Initialize the Servlet host + servletHostClass.getMethod("init", FilterConfig.class).invoke(servletHost, filterConfig); + + // The Servlet host also implements the filter interface + filter = (Filter)servletHost; + + } finally { + Thread.currentThread().setContextClassLoader(tccl); + } + + } catch (Exception e) { + logger.log(Level.SEVERE, "Error Starting SCA WebApp Node", e); + throw new ServletException(e); + } + + logger.info("SCA WebApp Node started."); + } + + public void destroy() { + logger.info("Apache Tuscany WebApp Node stopping..."); + if (servletHost != null) { + ClassLoader tccl = Thread.currentThread().getContextClassLoader(); + try { + if (runtimeClassLoader != null) { + Thread.currentThread().setContextClassLoader(runtimeClassLoader); + } + + servletHostClass.getMethod("destroy").invoke(servletHost); + + } catch (Exception e) { + logger.log(Level.SEVERE, "Error Stopping SCA WebApp Node", e); + } finally { + Thread.currentThread().setContextClassLoader(tccl); + } + } + logger.info("SCA WebApp Node stopped."); + } + + public void doFilter(ServletRequest request, ServletResponse response, javax.servlet.FilterChain chain) + throws IOException, ServletException { + + // Delegate to the Servlet host filter + ClassLoader tccl = Thread.currentThread().getContextClassLoader(); + try { + if (runtimeClassLoader != null) { + Thread.currentThread().setContextClassLoader(runtimeClassLoader); + } + + filter.doFilter(request, response, chain); + + } finally { + Thread.currentThread().setContextClassLoader(tccl); + } + } + +} |