diff options
Diffstat (limited to 'sca-java-2.x/tags/2.0-M1/modules/implementation-node-runtime/src/main/java/org/apache/tuscany/sca/implementation/node/webapp')
2 files changed, 511 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0-M1/modules/implementation-node-runtime/src/main/java/org/apache/tuscany/sca/implementation/node/webapp/NodeWebAppRequestDispatcher.java b/sca-java-2.x/tags/2.0-M1/modules/implementation-node-runtime/src/main/java/org/apache/tuscany/sca/implementation/node/webapp/NodeWebAppRequestDispatcher.java new file mode 100644 index 0000000000..f6a601a3cd --- /dev/null +++ b/sca-java-2.x/tags/2.0-M1/modules/implementation-node-runtime/src/main/java/org/apache/tuscany/sca/implementation/node/webapp/NodeWebAppRequestDispatcher.java @@ -0,0 +1,119 @@ +/* + * 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.implementation.node.webapp; + +import java.io.IOException; +import java.util.StringTokenizer; + +import javax.servlet.RequestDispatcher; +import javax.servlet.Servlet; +import javax.servlet.ServletException; +import javax.servlet.ServletRequest; +import javax.servlet.ServletResponse; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletRequestWrapper; + +/** + * A Servlet request dispatcher that can be used to delegate requests to a + * Serlvet registered with the Webapp Servlet host. + * + * @version $Rev$ $Date$ + */ +class NodeWebAppRequestDispatcher implements RequestDispatcher { + private String servletPath; + private Servlet servlet; + + /** + * Constructs a new request dispatcher. + * + * @param mapping + * @param servlet + */ + public NodeWebAppRequestDispatcher(String mapping, Servlet servlet) { + if (mapping.endsWith("*")) { + mapping = mapping.substring(0, mapping.length()-1); + } + if (mapping.endsWith("/")) { + mapping = mapping.substring(0, mapping.length()-1); + } + this.servletPath = mapping; + this.servlet = servlet; + } + + /** + * Returns a request wrapper which will return the correct Servlet path + * and path info. + * + * @param request + * @return + */ + private HttpServletRequest createRequestWrapper(ServletRequest request) { + HttpServletRequest requestWrapper = new HttpServletRequestWrapper((HttpServletRequest)request) { + + @Override + public String getServletPath() { + return servletPath; + } + + @Override + public String getPathInfo() { + String path = super.getServletPath(); + if (path.length() == 0) { + path = super.getPathInfo(); + } + + // TODO: another context path hack, revisit when context path is sorted out + path = fiddlePath(path, servletPath); + + return path; + } + }; + return requestWrapper; + } + + /** + * Remove any path suffix thats part of the Servlet context path. + * + * @param path + * @param servletPath + */ + private static String fiddlePath(String path, String servletPath) { + StringTokenizer st = new StringTokenizer(path, "/"); + String root = ""; + while (st.hasMoreTokens()){ + String s = st.nextToken(); + if (servletPath.endsWith((root + "/" + s))) { + root += "/" + s; + } else { + break; + } + } + String fiddlePath = path.substring(root.length()); + return fiddlePath; + } + + public void forward(ServletRequest request, ServletResponse response) throws ServletException, IOException { + servlet.service(createRequestWrapper(request), response); + } + + public void include(ServletRequest request, ServletResponse response) throws ServletException, IOException { + servlet.service(createRequestWrapper(request), response); + } +} diff --git a/sca-java-2.x/tags/2.0-M1/modules/implementation-node-runtime/src/main/java/org/apache/tuscany/sca/implementation/node/webapp/NodeWebAppServletHost.java b/sca-java-2.x/tags/2.0-M1/modules/implementation-node-runtime/src/main/java/org/apache/tuscany/sca/implementation/node/webapp/NodeWebAppServletHost.java new file mode 100644 index 0000000000..43c91ac9af --- /dev/null +++ b/sca-java-2.x/tags/2.0-M1/modules/implementation-node-runtime/src/main/java/org/apache/tuscany/sca/implementation/node/webapp/NodeWebAppServletHost.java @@ -0,0 +1,392 @@ +/* + * 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.implementation.node.webapp; + +import java.io.IOException; +import java.lang.reflect.Method; +import java.net.InetAddress; +import java.net.MalformedURLException; +import java.net.URI; +import java.net.URL; +import java.net.UnknownHostException; +import java.util.Enumeration; +import java.util.HashMap; +import java.util.Map; +import java.util.logging.Logger; + +import javax.servlet.Filter; +import javax.servlet.FilterConfig; +import javax.servlet.RequestDispatcher; +import javax.servlet.Servlet; +import javax.servlet.ServletConfig; +import javax.servlet.ServletContext; +import javax.servlet.ServletException; +import javax.servlet.ServletRequest; +import javax.servlet.ServletResponse; +import javax.servlet.http.HttpServletRequest; + +import org.apache.tuscany.sca.core.ExtensionPointRegistry; +import org.apache.tuscany.sca.host.http.ServletHost; +import org.apache.tuscany.sca.host.http.ServletHostExtensionPoint; +import org.apache.tuscany.sca.host.http.ServletMappingException; +import org.apache.tuscany.sca.implementation.node.launcher.NodeImplementationLauncherUtil; +import org.apache.tuscany.sca.node.Client; +import org.apache.tuscany.sca.node.Node; +import org.apache.tuscany.sca.node.NodeFactory; + +/** + * ServletHost implementation for use in a Webapp Node environment. + * + * @version $Rev$ $Date$ + */ +public class NodeWebAppServletHost implements ServletHost, Filter { + private static final Logger logger = Logger.getLogger(NodeWebAppServletHost.class.getName()); + + private static final NodeWebAppServletHost servletHost = new NodeWebAppServletHost(); + + private Map<String, Servlet> servlets = new HashMap<String, Servlet>(); + private Node node; + + private String contextPath = "/"; + private int defaultPort = 8080; + + /** + * Constructs a new NodeWebAppServletHost. + */ + private NodeWebAppServletHost() { + } + + /** + * Returns the Servlet host for the current Web app. + * + * @return + */ + public static NodeWebAppServletHost servletHost() { + return servletHost; + } + + /** + * Initialize the Servlet host. + * + * @param filterConfig + * @throws ServletException + */ + public void init(final FilterConfig filterConfig) throws ServletException { + + // Create a Servlet config wrapping the given filter config + ServletConfig servletConfig = servletConfig(filterConfig); + + // Get the Servlet context + ServletContext servletContext = servletConfig.getServletContext(); + + // Initialize the context path + contextPath = contextPath(servletContext); + + // Derive the node name from the Webapp context path + String nodeName = contextPath; + if (nodeName.startsWith("/")) { + nodeName = nodeName.substring(1); + } + if (nodeName.endsWith("/")) { + nodeName = nodeName.substring(0, nodeName.length() - 1); + } + + // Determine the node configuration URI + String nodeConfiguration = NodeImplementationLauncherUtil.nodeConfigurationURI(nodeName); + + // Create the SCA node + NodeFactory nodeFactory = NodeFactory.newInstance(); + node = nodeFactory.createNode(nodeConfiguration); + + // Register the Servlet host + ServletHostExtensionPoint servletHosts = servletHosts(node); + servletHosts.getServletHosts().clear(); + servletHosts.addServletHost(servletHost); + + // Save the node in the Servlet context + servletContext.setAttribute(Client.class.getName(), node); + + // Start the node + node.start(); + + // Initialize the registered Servlets + for (Servlet servlet : servlets.values()) { + servlet.init(servletConfig); + } + } + + public void addServletMapping(String suri, Servlet servlet) throws ServletMappingException { + URI pathURI = URI.create(suri); + + // Make sure that the path starts with a / + suri = pathURI.getPath(); + if (!suri.startsWith("/")) { + suri = '/' + suri; + } + + if (!suri.startsWith(contextPath)) { + suri = contextPath + suri; + } + + // In a webapp just use the given path and ignore the host and port + // as they are fixed by the Web container + servlets.put(suri, servlet); + + logger.info("Added Servlet mapping: " + suri); + } + + public Servlet removeServletMapping(String suri) throws ServletMappingException { + URI pathURI = URI.create(suri); + + // Make sure that the path starts with a / + suri = pathURI.getPath(); + if (!suri.startsWith("/")) { + suri = '/' + suri; + } + + if (!suri.startsWith(contextPath)) { + suri = contextPath + suri; + } + + // In a webapp just use the given path and ignore the host and port + // as they are fixed by the Web container + return servlets.remove(suri); + } + + public Servlet getServletMapping(String suri) throws ServletMappingException { + if (!suri.startsWith("/")) { + suri = '/' + suri; + } + + if (!suri.startsWith(contextPath)) { + suri = contextPath + suri; + } + + // Get the Servlet mapped to the given path + Servlet servlet = servlets.get(suri); + return servlet; + } + + public URL getURLMapping(String suri) throws ServletMappingException { + URI uri = URI.create(suri); + + // Get the URI scheme and port + String scheme = uri.getScheme(); + if (scheme == null) { + scheme = "http"; + } + int portNumber = uri.getPort(); + if (portNumber == -1) { + portNumber = defaultPort; + } + + // Get the host + String host; + try { + host = InetAddress.getLocalHost().getHostName(); + } catch (UnknownHostException e) { + host = "localhost"; + } + + // Construct the URL + String path = uri.getPath(); + if (!path.startsWith("/")) { + path = '/' + path; + } + + if (contextPath != null && !path.startsWith(contextPath)) { + path = contextPath + path; + } + + URL url; + try { + url = new URL(scheme, host, portNumber, path); + } catch (MalformedURLException e) { + throw new ServletMappingException(e); + } + return url; + } + + public RequestDispatcher getRequestDispatcher(String suri) throws ServletMappingException { + + // Make sure that the path starts with a / + if (!suri.startsWith("/")) { + suri = '/' + suri; + } + + suri = contextPath + suri; + + // Get the Servlet mapped to the given path + Servlet servlet = servlets.get(suri); + if (servlet != null) { + return new NodeWebAppRequestDispatcher(suri, servlet); + } + + for (Map.Entry<String, Servlet> entry : servlets.entrySet()) { + String servletPath = entry.getKey(); + if (servletPath.endsWith("*")) { + servletPath = servletPath.substring(0, servletPath.length() - 1); + if (suri.startsWith(servletPath)) { + return new NodeWebAppRequestDispatcher(entry.getKey(), entry.getValue()); + } else { + if ((suri + "/").startsWith(servletPath)) { + return new NodeWebAppRequestDispatcher(entry.getKey(), entry.getValue()); + } + } + } + } + + // No Servlet found + return null; + } + + /** + * Destroy the Servlet host. + * + * @throws ServletException + */ + public void destroy() { + + // Destroy the registered Servlets + for (Servlet servlet : servlets.values()) { + servlet.destroy(); + } + + // Stop the node + if (node != null) { + node.stop(); + } + } + + public void doFilter(ServletRequest request, ServletResponse response, javax.servlet.FilterChain chain) + throws IOException, ServletException { + + // Get the Servlet path + HttpServletRequest httpRequest = (HttpServletRequest)request; + String path = httpRequest.getPathInfo(); + if (path == null) { + path = httpRequest.getServletPath(); + } + if (path == null) { + path = "/"; + } + + // Get a request dispatcher for the Servlet mapped to that path + RequestDispatcher dispatcher = getRequestDispatcher(path); + if (dispatcher != null) { + + // Let the dispatcher forward the request to the Servlet + dispatcher.forward(request, response); + + } else { + + // Proceed down the filter chain + chain.doFilter(request, response); + } + } + + public void setDefaultPort(int port) { + defaultPort = port; + } + + public int getDefaultPort() { + return defaultPort; + } + + public String getContextPath() { + return contextPath; + } + + public void setContextPath(String path) { + //this.contextPath = path; + } + + /** + * Initializes the contextPath + * The 2.5 Servlet API has a getter for this, for pre 2.5 Servlet + * containers use an init parameter. + */ + private static String contextPath(ServletContext context) { + String contextPath = "/"; + + // The getContextPath() is introduced since Servlet 2.5 + Method m; + try { + // Try to get the method anyway since some ServletContext impl has this method even before 2.5 + m = context.getClass().getMethod("getContextPath", new Class[] {}); + contextPath = (String)m.invoke(context, new Object[] {}); + } catch (Exception e) { + contextPath = context.getInitParameter("contextPath"); + if (contextPath == null) { + logger.warning("Servlet level is: " + context.getMajorVersion() + "." + context.getMinorVersion()); + throw new IllegalStateException( + "'contextPath' init parameter must be set for pre-2.5 servlet container"); + } + } + + logger.info("ContextPath: " + contextPath); + return contextPath; + } + + /** + * Returns the Servlet host extension point used by the given node. + * + * @return + */ + private static ServletHostExtensionPoint servletHosts(Node node) { + //FIXME Need a clean way to get the extension point registry + // from the node + ExtensionPointRegistry registry; + try { + registry = (ExtensionPointRegistry)node.getClass().getMethod("getExtensionPointRegistry").invoke(node); + } catch (Exception e) { + throw new RuntimeException(e); + } + ServletHostExtensionPoint servletHosts = registry.getExtensionPoint(ServletHostExtensionPoint.class); + return servletHosts; + } + + /** + * Returns a Servlet config wrapping a filter config. + * + * @param filterConfig + * @return + */ + private static ServletConfig servletConfig(final FilterConfig filterConfig) { + ServletConfig servletConfig = new ServletConfig() { + public String getInitParameter(String name) { + return filterConfig.getInitParameter(name); + } + + public Enumeration getInitParameterNames() { + return filterConfig.getInitParameterNames(); + } + + public ServletContext getServletContext() { + return filterConfig.getServletContext(); + } + + public String getServletName() { + return filterConfig.getFilterName(); + } + }; + return servletConfig; + } +} |