Add module for Tomcat deep integration

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@778316 13f79535-47bb-0310-9956-ffa450edef68

2 files changed, 230 insertions, 0 deletions

diff --git a/java/sca/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyLifecycleListener.java b/java/sca/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyLifecycleListener.java
new file mode 100644
index 0000000000..9533c43acb
--- /dev/null
+++ b/java/sca/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyLifecycleListener.java
@@ -0,0 +1,146 @@
+/*

+ * 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 org.apache.catalina.Container;

+import org.apache.catalina.LifecycleEvent;

+import org.apache.catalina.LifecycleListener;

+import org.apache.catalina.ServerFactory;

+import org.apache.catalina.Service;

+import org.apache.catalina.connector.Connector;

+import org.apache.catalina.core.StandardEngine;

+import org.apache.catalina.core.StandardHost;

+import org.apache.catalina.core.StandardServer;

+import org.apache.catalina.core.StandardService;

+import org.apache.catalina.startup.HostConfig;

+

+/**

+ * A Tomcat LifecycleListener that initilizes the Tuscany Tomcat integration.

+ * It sets a System property with the location of the Tuscany runtime .war

+ * and configures each Tomcat Connector to use the TuscanyStandardContext.

+ * 

+ * To configure Tomcat to use this add the following to the Tomcat conf/server.xml

+ *   <Listener className="org.apache.tuscany.sca.tomcat.TuscanyLifecycleListener"/>

+ */

+public class TuscanyLifecycleListener implements LifecycleListener {

+//    private static transient Log log = LogFactory.getLog(StandardContext.class);

+

+    public static final String TUSCANY_WAR_PROP = "org.apache.tuscany.sca.tomcat.war";

+

+    private static boolean running;

+    public static boolean isRunning() {

+        return running;

+    }

+    

+    public TuscanyLifecycleListener() {

+        running = true;

+    }

+    

+    public void lifecycleEvent(LifecycleEvent event) {

+        if ("init".equals(event.getType()) && (event.getSource() instanceof StandardServer)) {

+            File webappDir = findTuscanyWar();

+            if (webappDir == null) {

+//                log.warn("Tuscany disabled as Tuscany webapp not found");

+            } else {

+                System.setProperty(TUSCANY_WAR_PROP, webappDir.getAbsolutePath());

+//                log.info("Using Tuscany webapp: " + webappDir.getAbsolutePath());

+                StandardServer server = (StandardServer)event.getSource();

+                StandardService catalina = (StandardService)server.findService("Catalina");

+                for (Connector connector : catalina.findConnectors()) {

+                    for (Container container: connector.getContainer().findChildren()) {

+                        if (container instanceof StandardHost) {

+                           for (LifecycleListener listener : ((StandardHost)container).findLifecycleListeners()) {

+                               if (listener instanceof HostConfig) {

+                                   ((HostConfig)listener).setContextClass("org.apache.tuscany.sca.tomcat.TuscanyStandardContext");

+//                                   log.info("TuscanyStandardContext set for connector: " + container.getName() + ":" + connector.getPort());

+                               }

+                           }

+                        }

+                    }

+                }

+            }

+        }

+    }

+

+    private static File findTuscanyWar() {

+

+        // in Tomcat 5.5 the Tuscany war is in the server/webapps director

+        String catalinaBase = System.getProperty("catalina.base");

+        File serverWebapps = new File(catalinaBase, "server/webapps");

+        File tuscanyWar = findTuscanyWar(serverWebapps);

+        if (tuscanyWar != null) {

+            return tuscanyWar;

+        }

+

+        // in Tomcat 6 the Tuscany war is normally in webapps, but we just scan all hosts directories

+        for (Service service : ServerFactory.getServer().findServices()) {

+            Container container = service.getContainer();

+            if (container instanceof StandardEngine) {

+                StandardEngine engine = (StandardEngine) container;

+                for (Container child : engine.findChildren()) {

+                    if (child instanceof StandardHost) {

+                        StandardHost host = (StandardHost) child;

+                        String appBase = host.getAppBase();

+

+                        // determine the host dir (normally webapps)

+                        File hostDir = new File(appBase);

+                        if (!hostDir.isAbsolute()) {

+                            hostDir = new File(catalinaBase, appBase);

+                        }

+

+                        tuscanyWar = findTuscanyWar(hostDir);

+                        if (tuscanyWar != null) {

+                            return tuscanyWar;

+                        }

+                    }

+                }

+            }

+        }

+        return null;

+    }

+

+    private static File findTuscanyWar(File hostDir) {

+        if (!hostDir.isDirectory()) {

+            return null;

+        }

+

+        // iterate over the contexts

+        for (File contextDir : hostDir.listFiles()) {

+            // does this war have a web-inf lib dir

+            File hookLib = new File(contextDir, "server-lib");

+            if (!hookLib.isDirectory()) {

+                continue;

+            }

+            // iterate over the libs looking for the tuscany-tomcat-*.jar

+            for (File file : hookLib.listFiles()) {

+                if (file.getName().startsWith("tuscany-tomcat-hook-") && file.getName().endsWith(".jar")) {

+                    // this should be in the Tuscany war...

+                    // make sure it has a runtime directory

+                    if (new File(contextDir, "tuscany-lib").isDirectory()) {

+                        return contextDir;

+                    }

+                }

+            }

+        }

+        return null;

+    }

+}

diff --git a/java/sca/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyStandardContext.java b/java/sca/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyStandardContext.java
new file mode 100644
index 0000000000..0d6404fff9
--- /dev/null
+++ b/java/sca/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyStandardContext.java
@@ -0,0 +1,84 @@
+/*

+ * 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.net.URL;

+import java.net.URLClassLoader;

+

+import javax.naming.NamingException;

+

+import org.apache.catalina.Loader;

+import org.apache.catalina.core.StandardContext;

+import org.apache.catalina.deploy.FilterDef;

+

+public class TuscanyStandardContext extends StandardContext {

+    private static final long serialVersionUID = 1L;

+

+    private ClassLoader tuscanyClassLoader;

+    

+    public Loader getLoader() {

+        if (loader != null) {

+            return loader;

+        }

+        

+        initTuscany();

+        

+        return super.getLoader();

+    }

+

+    private void initTuscany() {

+        String scaVersion = getSCAVersion();

+        if ("1.1".equals(scaVersion)) {

+            setParentClassLoader(getTuscanyClassloader(scaVersion));

+            addApplicationListener("org.apache.tuscany.sca.host.webapp.TuscanyContextListener");

+            FilterDef filterDef = new FilterDef();

+            filterDef.setFilterName("TuscanyFilter");

+            filterDef.setFilterClass("org.apache.tuscany.sca.host.webapp.TuscanyServletFilter");

+            addFilterDef(filterDef);

+        }

+    }

+

+    private String getSCAVersion() {

+        Object o = null;

+        try {

+            o = getResources().lookup("WEB-INF/web.composite");

+        } catch (NamingException e) {

+        }

+        return o != null ? "1.1" : null;

+    }

+

+    private ClassLoader getTuscanyClassloader(String version) {

+        if (tuscanyClassLoader == null) {

+            File tuscanyWar = new File(System.getProperty("org.apache.tuscany.sca.tomcat.war"));

+            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();

+                }

+                return new URLClassLoader(jarURLs, getParentClassLoader());

+            } catch (Exception e) {

+                throw new RuntimeException(e);

+            }

+        }

+        return tuscanyClassLoader;

+    }

+}