| /* |
| * 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.host.http; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.List; |
| |
| import javax.servlet.RequestDispatcher; |
| import javax.servlet.Servlet; |
| import javax.servlet.ServletContext; |
| |
| import org.apache.tuscany.sca.core.ExtensionPointRegistry; |
| import org.apache.tuscany.sca.core.LifeCycleListener; |
| import org.apache.tuscany.sca.extensibility.ServiceDeclaration; |
| import org.apache.tuscany.sca.extensibility.ServiceHelper; |
| |
| /** |
| * Default implementation of a Servlet host extension point. |
| * |
| * @version $Rev$ $Date$ |
| */ |
| public class DefaultServletHostExtensionPoint implements ServletHostExtensionPoint, LifeCycleListener { |
| |
| private List<ServletHost> servletHosts = new ArrayList<ServletHost>(); |
| private boolean loaded; |
| private boolean webApp; |
| |
| private ExtensionPointRegistry registry; |
| |
| public DefaultServletHostExtensionPoint(ExtensionPointRegistry registry) { |
| this.registry = registry; |
| } |
| |
| public void addServletHost(ServletHost servletHost) { |
| servletHosts.add(servletHost); |
| if (servletHost instanceof LifeCycleListener) { |
| ((LifeCycleListener)servletHost).start(); |
| } |
| } |
| |
| public void removeServletHost(ServletHost servletHost) { |
| servletHosts.remove(servletHost); |
| if (servletHost instanceof LifeCycleListener) { |
| ((LifeCycleListener)servletHost).stop(); |
| } |
| } |
| |
| public List<ServletHost> getServletHosts() { |
| loadServletHosts(); |
| return servletHosts; |
| } |
| |
| private synchronized void loadServletHosts() { |
| if (loaded) |
| return; |
| |
| // Get the databinding service declarations |
| Collection<ServiceDeclaration> sds; |
| try { |
| sds = registry.getServiceDiscovery().getServiceDeclarations(ServletHost.class, true); |
| } catch (IOException e) { |
| throw new IllegalStateException(e); |
| } |
| |
| // Load data bindings |
| for (ServiceDeclaration sd : sds) { |
| // Create a data binding wrapper and register it |
| ServletHost servletHost = new LazyServletHost(sd); |
| addServletHost(servletHost); |
| } |
| |
| loaded = true; |
| } |
| |
| /** |
| * A data binding facade allowing data bindings to be lazily loaded and |
| * initialized. |
| */ |
| public class LazyServletHost implements ServletHost, LifeCycleListener { |
| private ServiceDeclaration sd; |
| private ServletHost host; |
| |
| /** |
| * @param sd |
| */ |
| public LazyServletHost(ServiceDeclaration sd) { |
| super(); |
| this.sd = sd; |
| } |
| |
| public synchronized ServletHost getServletHost() { |
| if (host == null) { |
| try { |
| host = ServiceHelper.newInstance(registry, sd); |
| ServiceHelper.start(host); |
| } catch (Throwable e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| return host; |
| } |
| |
| public String addServletMapping(String uri, Servlet servlet) throws ServletMappingException { |
| return getServletHost().addServletMapping(uri, servlet); |
| } |
| |
| public String addServletMapping(String uri, Servlet servlet, SecurityContext securityContext) throws ServletMappingException { |
| return getServletHost().addServletMapping(uri, servlet, securityContext); |
| } |
| |
| public String getContextPath() { |
| return getServletHost().getContextPath(); |
| } |
| |
| public int getDefaultPort() { |
| return getServletHost().getDefaultPort(); |
| } |
| |
| public RequestDispatcher getRequestDispatcher(String uri) throws ServletMappingException { |
| return getServletHost().getRequestDispatcher(uri); |
| } |
| |
| public Servlet getServletMapping(String uri) throws ServletMappingException { |
| return getServletHost().getServletMapping(uri); |
| } |
| |
| public URL getURLMapping(String uri, SecurityContext securityContext) { |
| return getServletHost().getURLMapping(uri, securityContext); |
| } |
| |
| public Servlet removeServletMapping(String uri) throws ServletMappingException { |
| return getServletHost().removeServletMapping(uri); |
| } |
| |
| public void setAttribute(String name, Object value) { |
| getServletHost().setAttribute(name, value); |
| } |
| |
| public void setContextPath(String path) { |
| getServletHost().setContextPath(path); |
| } |
| |
| public void setDefaultPort(int port) { |
| getServletHost().setDefaultPort(port); |
| } |
| |
| public String getName() { |
| return sd.getAttributes().get("name"); |
| } |
| |
| public void start() { |
| } |
| |
| public void stop() { |
| ServiceHelper.stop(host); |
| } |
| |
| @Override |
| public ServletContext getServletContext() { |
| return getServletHost().getServletContext(); |
| } |
| } |
| |
| public void start() { |
| } |
| |
| public void stop() { |
| ServiceHelper.stop(servletHosts); |
| servletHosts.clear(); |
| registry = null; |
| } |
| |
| public boolean isWebApp() { |
| return webApp; |
| } |
| |
| public void setWebApp(boolean webApp) { |
| this.webApp = webApp; |
| } |
| } |