Branch for 2.0 Milestone M5

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@948800 13f79535-47bb-0310-9956-ffa450edef68

5 files changed, 792 insertions, 0 deletions

diff --git a/sca-java-2.x/branches/sca-java-2.0-M5/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyAnnotationsProcessor.java b/sca-java-2.x/branches/sca-java-2.0-M5/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyAnnotationsProcessor.java
new file mode 100644
index 0000000000..54947d6492
--- /dev/null
+++ b/sca-java-2.x/branches/sca-java-2.0-M5/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyAnnotationsProcessor.java
@@ -0,0 +1,85 @@
+/*
+ * 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.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+import javax.naming.NamingException;
+import javax.servlet.ServletContext;
+
+import org.apache.AnnotationProcessor;
+import org.apache.catalina.util.DefaultAnnotationProcessor;
+
+public class TuscanyAnnotationsProcessor implements AnnotationProcessor {
+
+    private TuscanyStandardContext tuscanyStandardContext;
+    private AnnotationProcessor tomcatAnnotationProcessor;
+    private Method tuscanyInjectMethod;
+    
+    public TuscanyAnnotationsProcessor(TuscanyStandardContext tuscanyStandardContext, javax.naming.Context context) {
+        this.tuscanyStandardContext = tuscanyStandardContext;
+        this.tomcatAnnotationProcessor = new DefaultAnnotationProcessor(context);
+        initInjectMethod(tuscanyStandardContext);
+    }
+
+    private void initInjectMethod(TuscanyStandardContext tuscanyStandardContext) {
+        
+        // this needs to use reflection as the tuscany-hook module can't have any
+        // dependencies on the tuscany runtime modules as they're not 
+        // in the server classpath 
+        // TODO: is there a nicer way ?
+        
+        ClassLoader cl = tuscanyStandardContext.getParentClassLoader();
+        try {
+            Class<?> c = Class.forName("org.apache.tuscany.sca.implementation.web.runtime.utils.ContextHelper", true, cl);
+            if (c != null) {
+                this.tuscanyInjectMethod = c.getMethod("inject", new Class[]{Object.class, ServletContext.class});
+            }
+        } catch (Exception e){
+            // ignore
+        }
+    }
+    
+    public void postConstruct(Object instance) throws IllegalAccessException, InvocationTargetException {
+        tomcatAnnotationProcessor.postConstruct(instance);
+    }
+
+    public void preDestroy(Object instance) throws IllegalAccessException, InvocationTargetException {
+        tomcatAnnotationProcessor.preDestroy(instance);
+    }
+
+    public void processAnnotations(Object instance) throws IllegalAccessException, InvocationTargetException, NamingException {
+        if (tuscanyInjectMethod != null) {
+            ServletContext sc = tuscanyStandardContext.getServletContext();
+            if (sc != null) {
+                Object rc = sc.getAttribute("org.apache.tuscany.sca.implementation.web.RuntimeComponent");
+                if (rc != null) {
+                    try {
+                        tuscanyInjectMethod.invoke(null, instance, sc);
+                    } catch (Exception e) {
+                        throw new InvocationTargetException(e);
+                    }
+                }
+            }
+        }
+        tomcatAnnotationProcessor.processAnnotations(instance);
+    }
+}
diff --git a/sca-java-2.x/branches/sca-java-2.0-M5/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyContextConfig.java b/sca-java-2.x/branches/sca-java-2.0-M5/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyContextConfig.java
new file mode 100644
index 0000000000..5e7905d246
--- /dev/null
+++ b/sca-java-2.x/branches/sca-java-2.0-M5/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyContextConfig.java
@@ -0,0 +1,183 @@
+/*

+ * 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.io.IOException;

+import java.net.URL;

+

+import org.apache.catalina.Host;

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

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

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

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

+

+public class TuscanyContextConfig extends ContextConfig{

+

+    /**

+     * Return the location of the default deployment descriptor

+     * 

+     * Override the super class method to use the Tuscany specific

+     * default web.xml which has the Tuscany listener and filer config 

+     */

+    @Override

+    public String getDefaultWebXml() {

+        if( defaultWebXml == null ) {

+            defaultWebXml="conf/tuscany-web.xml";

+        }

+        return (this.defaultWebXml);

+    }

+    

+    /**

+     * Adjust docBase.

+     * 

+     * This is cutNpaste of the Tomcat method but changed on the lines marked with // TUSCANY:

+     * to override the default that only works for file names ending with .war

+     * 

+     */

+    @Override

+    protected void fixDocBase()

+        throws IOException {

+        

+        Host host = (Host) context.getParent();

+        String appBase = host.getAppBase();

+

+        boolean unpackWARs = true;

+        if (host instanceof StandardHost) {

+            unpackWARs = ((StandardHost) host).isUnpackWARs() 

+                && ((StandardContext) context).getUnpackWAR();

+        }

+

+        File canonicalAppBase = new File(appBase);

+        if (canonicalAppBase.isAbsolute()) {

+            canonicalAppBase = canonicalAppBase.getCanonicalFile();

+        } else {

+            canonicalAppBase = 

+                new File(System.getProperty("catalina.base"), appBase)

+                .getCanonicalFile();

+        }

+

+        String docBase = context.getDocBase();

+        if (docBase == null) {

+            // Trying to guess the docBase according to the path

+            String path = context.getPath();

+            if (path == null) {

+                return;

+            }

+            if (path.equals("")) {

+                docBase = "ROOT";

+            } else {

+                if (path.startsWith("/")) {

+                    docBase = path.substring(1);

+                } else {

+                    docBase = path;

+                }

+            }

+        }

+

+        File file = new File(docBase);

+        if (!file.isAbsolute()) {

+            docBase = (new File(canonicalAppBase, docBase)).getPath();

+        } else {

+            docBase = file.getCanonicalPath();

+        }

+        file = new File(docBase);

+        String origDocBase = docBase;

+        

+        String contextPath = context.getPath();

+        if (contextPath.equals("")) {

+            contextPath = "ROOT";

+        } else {

+            if (contextPath.lastIndexOf('/') > 0) {

+                contextPath = "/" + contextPath.substring(1).replace('/','#');

+            }

+        }

+        // TUSCANY: update from .war to also support .jar and .zip SCA contributions 

+        if ((docBase.toLowerCase().endsWith(".war") || docBase.toLowerCase().endsWith(".jar")||docBase.toLowerCase().endsWith(".zip")) && !file.isDirectory() && unpackWARs) {

+            URL war = new URL("jar:" + (new File(docBase)).toURI().toURL() + "!/");

+            docBase = ExpandWar.expand(host, war, contextPath);

+            file = new File(docBase);

+            docBase = file.getCanonicalPath();

+            if (context instanceof StandardContext) {

+                ((StandardContext) context).setOriginalDocBase(origDocBase);

+            }

+        } else {

+            File docDir = new File(docBase);

+            if (!docDir.exists()) {

+                // TUSCANY: update from .war to also support .jar and .zip SCA contributions 

+                File warFile = new File(docBase + ".war");

+                if (warFile.exists()) {

+                    if (unpackWARs) {

+                        URL war =

+                            new URL("jar:" + warFile.toURI().toURL() + "!/");

+                        docBase = ExpandWar.expand(host, war, contextPath);

+                        file = new File(docBase);

+                        docBase = file.getCanonicalPath();

+                    } else {

+                        docBase = warFile.getCanonicalPath();

+                    }

+                } else {

+                    warFile = new File(docBase + ".jar");

+                    if (warFile.exists()) {

+                        if (unpackWARs) {

+                            URL war =

+                                new URL("jar:" + warFile.toURI().toURL() + "!/");

+                            docBase = ExpandWar.expand(host, war, contextPath);

+                            file = new File(docBase);

+                            docBase = file.getCanonicalPath();

+                        } else {

+                            docBase = warFile.getCanonicalPath();

+                        }

+                    } else {

+                        warFile = new File(docBase + ".zip");

+                        if (warFile.exists()) {

+                            if (unpackWARs) {

+                                URL war =

+                                    new URL("jar:" + warFile.toURI().toURL() + "!/");

+                                docBase = ExpandWar.expand(host, war, contextPath);

+                                file = new File(docBase);

+                                docBase = file.getCanonicalPath();

+                            } else {

+                                docBase = warFile.getCanonicalPath();

+                            }

+                        }

+                    }

+                }

+                if (context instanceof StandardContext) {

+                    ((StandardContext) context).setOriginalDocBase(origDocBase);

+                }

+            }

+        }

+

+        if (docBase.startsWith(canonicalAppBase.getPath())) {

+            docBase = docBase.substring(canonicalAppBase.getPath().length());

+            docBase = docBase.replace(File.separatorChar, '/');

+            if (docBase.startsWith("/")) {

+                docBase = docBase.substring(1);

+            }

+        } else {

+            docBase = docBase.replace(File.separatorChar, '/');

+        }

+

+        context.setDocBase(docBase);

+

+    }

+    

+}

diff --git a/sca-java-2.x/branches/sca-java-2.0-M5/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyHostConfig.java b/sca-java-2.x/branches/sca-java-2.0-M5/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyHostConfig.java
new file mode 100644
index 0000000000..e92d7a0bf6
--- /dev/null
+++ b/sca-java-2.x/branches/sca-java-2.0-M5/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyHostConfig.java
@@ -0,0 +1,167 @@
+/*

+ * 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.util.zip.ZipEntry;

+import java.util.zip.ZipFile;

+

+import org.apache.catalina.Context;

+import org.apache.catalina.Lifecycle;

+import org.apache.catalina.LifecycleListener;

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

+

+/**

+ * A Tuscany customized HostConfig that adds support for SCA contributions

+ * to be deployed along with the usual .war files.

+ */

+public class TuscanyHostConfig extends HostConfig {

+

+    protected File scaBase = null;

+    

+    @Override

+    protected void deployApps() {

+

+        File appBase = appBase();

+        File configBase = configBase();

+        // Deploy XML descriptors from configBase

+        deployDescriptors(configBase, configBase.list());

+        // Deploy WARs, and loop if additional descriptors are found

+        deployWARs(appBase, appBase.list());

+        // TUSCANY: Deploy any SCA contibutions

+        deploySCAContributions(appBase, appBase.list());

+        // Deploy expanded folders

+        deployDirectories(appBase, appBase.list());

+    }

+

+    protected void deploySCAContributions(File appBase, String[] files) {

+        if (files == null)

+            return;

+        

+        for (int i = 0; i < files.length; i++) {

+            

+            File scafile = new File(appBase, files[i]);

+            

+            if (scafile.isFile() && isSCAContribution(scafile)) {

+                

+                // Calculate the context path and make sure it is unique

+                String contextPath = "/" + files[i].replace('#','/');

+                int period = contextPath.lastIndexOf(".");

+                if (period >= 0)

+                    contextPath = contextPath.substring(0, period);

+

+                if (isServiced(contextPath))

+                    continue;

+                

+                String file = files[i];

+                

+                deploySCAContribution(contextPath, scafile, file);

+                

+            }

+            

+        }

+        

+    }

+

+    protected String tuscanyContextClass = "org.apache.tuscany.sca.tomcat.TuscanyContextConfig";

+    

+    protected void deploySCAContribution(String contextPath, File dir, String file) {

+        if (deploymentExists(contextPath))

+            return;

+

+        DeployedApplication deployedApp = new DeployedApplication(contextPath);

+        

+        // Deploy the application in this WAR file

+        if(log.isInfoEnabled()) 

+            log.info("Deploying SCA contibution: " + file);

+

+        // Populate redeploy resources with the WAR file

+        deployedApp.redeployResources.put(dir.getAbsolutePath(), new Long(dir.lastModified()));

+

+        try {

+            Context context = (Context) Class.forName(contextClass).newInstance();

+            if (context instanceof Lifecycle) {

+                

+                // Tuscany: change to use the Tuscany ContextConfig class

+                Class clazz = Class.forName(tuscanyContextClass);

+

+                LifecycleListener listener =

+                    (LifecycleListener) clazz.newInstance();

+                ((Lifecycle) context).addLifecycleListener(listener);

+            }

+            context.setPath(contextPath);

+            context.setDocBase(file);

+

+            host.addChild(context);

+            // If we're unpacking WARs, the docBase will be mutated after

+            // starting the context

+            if (unpackWARs && (context.getDocBase() != null)) {

+                String name = null;

+                String path = context.getPath();

+                if (path.equals("")) {

+                    name = "ROOT";

+                } else {

+                    if (path.startsWith("/")) {

+                        name = path.substring(1);

+                    } else {

+                        name = path;

+                    }

+                }

+                name = name.replace('/', '#');

+                File docBase = new File(name);

+                if (!docBase.isAbsolute()) {

+                    docBase = new File(appBase(), name);

+                }

+                deployedApp.redeployResources.put(docBase.getAbsolutePath(),

+                        new Long(docBase.lastModified()));

+                addWatchedResources(deployedApp, docBase.getAbsolutePath(), context);

+            } else {

+                addWatchedResources(deployedApp, null, context);

+            }

+        } catch (Throwable t) {

+            log.error(sm.getString("hostConfig.deployJar.error", file), t);

+        }

+        

+        deployed.put(contextPath, deployedApp);

+    }

+    

+    protected boolean isSCAContribution(File file) {

+        ZipFile zip = null;

+        ZipEntry entry = null;

+        try {

+            try {

+                zip = new ZipFile(file);

+                entry = zip.getEntry("META-INF/sca-contribution.xml");

+            } catch (Exception e) {

+            }

+

+            return (entry != null);

+

+        } finally {

+            if (zip != null) {

+                try {

+                    zip.close();

+                } catch (Throwable t) {

+                }

+            }

+        }

+    }

+    

+}

diff --git a/sca-java-2.x/branches/sca-java-2.0-M5/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyLifecycleListener.java b/sca-java-2.x/branches/sca-java-2.0-M5/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyLifecycleListener.java
new file mode 100644
index 0000000000..a9eee9687e
--- /dev/null
+++ b/sca-java-2.x/branches/sca-java-2.0-M5/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyLifecycleListener.java
@@ -0,0 +1,161 @@
+/*
+ * 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.util.logging.Logger;
+
+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 final Logger log = Logger.getLogger(TuscanyLifecycleListener.class.getName());
+
+    public static final String TUSCANY_WAR_PROP = "org.apache.tuscany.sca.tomcat.war";
+
+    private static boolean running;
+
+    public static boolean isRunning() {
+        return running;
+    }
+
+    static final String TUSCANY_SHARED_PROP = "org.apache.tuscany.sca.tomcat.shared";
+
+    private static String domainURI = "tuscany:default";
+
+    public TuscanyLifecycleListener() {
+        running = true;
+        log.info("Apache Tuscany initilizing");
+    }
+
+    public void lifecycleEvent(LifecycleEvent event) {
+        if ("init".equals(event.getType()) && (event.getSource() instanceof StandardServer)) {
+            File webappDir = findTuscanyWar();
+            if (webappDir == null) {
+                log.severe("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("Tuscany enabled on 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, "tomcat-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;
+    }
+    
+    public void setDomainURI(String domainURI) {
+        TuscanyLifecycleListener.domainURI = domainURI;
+    }
+    
+    public static String getDomainURI() {
+        return domainURI;
+    }
+}
diff --git a/sca-java-2.x/branches/sca-java-2.0-M5/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyStandardContext.java b/sca-java-2.x/branches/sca-java-2.0-M5/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyStandardContext.java
new file mode 100644
index 0000000000..ca9c81f1c3
--- /dev/null
+++ b/sca-java-2.x/branches/sca-java-2.0-M5/distribution/tomcat/tomcat-hook/src/main/java/org/apache/tuscany/sca/tomcat/TuscanyStandardContext.java
@@ -0,0 +1,196 @@
+/*
+ * 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);
+            }
+        }
+    }
+}