| /* |
| * 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.tomcat; |
| |
| import java.io.File; |
| import java.lang.reflect.Method; |
| import java.net.URI; |
| import java.net.URL; |
| import java.net.URLClassLoader; |
| import java.util.logging.Logger; |
| |
| import javax.naming.NameClassPair; |
| import javax.naming.NamingEnumeration; |
| import javax.naming.NamingException; |
| |
| import org.apache.catalina.LifecycleException; |
| import org.apache.catalina.Loader; |
| import org.apache.catalina.core.StandardContext; |
| |
| /** |
| * A Tuscany StandardContext to initilize SCA applications. |
| * There is a StandardContext instance for each webapp and its |
| * called to handle all start/stop/etc requests. This intercepts |
| * the start and inserts any required Tuscany configuration. |
| */ |
| public class TuscanyStandardContext extends StandardContext { |
| private static final long serialVersionUID = 1L; |
| private static final Logger log = Logger.getLogger(TuscanyStandardContext.class.getName()); |
| |
| private boolean isSCAApp; |
| |
| // TODO: this gives an instance per webapp, work out how to have only one per server |
| // ?? is that comment still true? |
| private static URLClassLoader tuscanyClassLoader; |
| private static Object node; |
| private static Class<?> nodeClass; |
| private static Method nodeStopMethod; |
| |
| public TuscanyStandardContext() { |
| } |
| |
| /** |
| * Overrides the getLoader method in the Tomcat StandardContext as its a convenient |
| * point to insert the Tuscany initilization. This gets called the first time during |
| * StandardContext.start after the webapp resources have been created so this can |
| * use getResources() to look for the SCA web.composite or sca-contribution.xml files, |
| * but its still early enough in start to insert the required Tuscany config. |
| */ |
| @Override |
| public Loader getLoader() { |
| if (loader != null) { |
| return loader; |
| } |
| |
| ClassLoader parent = getParentClassLoader(); |
| if (isSCAApp = isSCAApplication()) { |
| if (tuscanyClassLoader == null) { |
| initTuscany(); |
| } |
| setParentClassLoader(getTuscanyClassloader(parent)); |
| setDefaultWebXml("conf/tuscany-web.xml"); |
| } |
| |
| return super.getLoader(); |
| } |
| |
| @Override |
| public boolean listenerStart() { |
| if (isSCAApp) { |
| enableTuscany(); |
| } |
| return super.listenerStart(); |
| } |
| |
| private void enableTuscany() { |
| |
| if (isUseNaming() && getNamingContextListener() != null) { |
| setAnnotationProcessor(new TuscanyAnnotationsProcessor(this, getNamingContextListener().getEnvContext())); |
| } else { |
| setAnnotationProcessor(new TuscanyAnnotationsProcessor(this, null)); |
| } |
| |
| log.info("Tuscany SCA is enabled for: " + this.getName()); |
| } |
| |
| private boolean isSCAApplication() { |
| Object o = null; |
| try { |
| o = getResources().lookup("WEB-INF/web.composite"); |
| } catch (NamingException e) { |
| } |
| if (o == null) { |
| try { |
| o = getResources().lookup("META-INF/sca-contribution.xml"); |
| } catch (NamingException e) { |
| } |
| } |
| if (o == null) { |
| return false; |
| } |
| |
| // Try to see if the Tuscany jars are packaged in the webapp |
| NamingEnumeration<NameClassPair> enumeration; |
| try { |
| enumeration = getResources().list("WEB-INF/lib"); |
| while (enumeration.hasMoreElements()) { |
| String jar = enumeration.nextElement().getName(); |
| if (jar.startsWith("tuscany-")) { |
| // Do not alter is |
| log.info("Tuscany SCA ignoring webapp with embedded Tuscany runtime: " + this.getName()); |
| return false; |
| } |
| } |
| } catch (NamingException e) { |
| } |
| return true; |
| } |
| |
| private URLClassLoader getTuscanyClassloader(ClassLoader parent) { |
| return tuscanyClassLoader; |
| } |
| |
| private void initTuscany() { |
| initTuscanyClassloader(getParentClassLoader()); |
| initDomain(); |
| } |
| |
| private void initTuscanyClassloader(ClassLoader parent) { |
| if (tuscanyClassLoader == null) { |
| File tuscanyWar = new File(System.getProperty(TuscanyLifecycleListener.TUSCANY_WAR_PROP)); |
| File[] runtimeJars = new File(tuscanyWar, "tuscany-lib").listFiles(); |
| try { |
| URL[] jarURLs = new URL[runtimeJars.length]; |
| for (int i = 0; i < jarURLs.length; i++) { |
| jarURLs[i] = runtimeJars[i].toURI().toURL(); |
| } |
| tuscanyClassLoader = new URLClassLoader(jarURLs, parent); |
| |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| |
| private void initDomain() { |
| ClassLoader oldCL = Thread.currentThread().getContextClassLoader(); |
| try { |
| Thread.currentThread().setContextClassLoader(tuscanyClassLoader); |
| Class<?> nodeFactoryClass = Class.forName("org.apache.tuscany.sca.node.NodeFactory", true, tuscanyClassLoader); |
| Method getInstanceMethod = nodeFactoryClass.getMethod("getInstance", new Class[0]); |
| Object instance = getInstanceMethod.invoke(null); |
| Method createNodeMethod = nodeFactoryClass.getMethod("createNode", new Class[]{URI.class, new String[0].getClass()}); |
| URI domainURI = URI.create(TuscanyLifecycleListener.getDomainURI()); |
| this.node = createNodeMethod.invoke(instance, new Object[]{domainURI, new String[0]}); |
| this.nodeClass = Class.forName("org.apache.tuscany.sca.node.Node", true, tuscanyClassLoader); |
| Method nodeStartMethod = nodeClass.getMethod("start", new Class[0]); |
| this.nodeStopMethod = nodeClass.getMethod("stop", new Class[0]); |
| nodeStartMethod.invoke(node); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } finally { |
| Thread.currentThread().setContextClassLoader(oldCL); |
| } |
| } |
| |
| @Override |
| public synchronized void stop() throws LifecycleException { |
| super.stop(); |
| |
| if (node != null && nodeStopMethod != null) { |
| try { |
| nodeStopMethod.invoke(node); |
| node = null; |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| } |