- Changing the implementation-guardian to work with the policy-guardianException module

- Adding the policy-guardianException module: The guardian member is implemented as policies

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@831060 13f79535-47bb-0310-9956-ffa450edef68

18 files changed, 1119 insertions, 0 deletions

diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/.classpath b/sandbox/dougsleite/policy-guardianExceptionHandling/.classpath
new file mode 100644
index 0000000000..f42fb64cfa
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/.classpath
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" output="target/classes" path="src/main/java"/>
+	<classpathentry excluding="**" kind="src" output="target/classes" path="src/main/resources"/>
+	<classpathentry kind="src" output="target/test-classes" path="src/test/java"/>
+	<classpathentry excluding="**" kind="src" output="target/test-classes" path="src/test/resources"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5"/>
+	<classpathentry kind="con" path="org.maven.ide.eclipse.MAVEN2_CLASSPATH_CONTAINER"/>
+	<classpathentry kind="output" path="target/classes"/>
+</classpath>
diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/.project b/sandbox/dougsleite/policy-guardianExceptionHandling/.project
new file mode 100644
index 0000000000..935115b5ef
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/.project
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>tuscany-policy-guardianExceptionHandling</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.maven.ide.eclipse.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.maven.ide.eclipse.maven2Nature</nature>
+	</natures>
+</projectDescription>
diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/.settings/org.eclipse.jdt.core.prefs b/sandbox/dougsleite/policy-guardianExceptionHandling/.settings/org.eclipse.jdt.core.prefs
new file mode 100644
index 0000000000..91ffe469de
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/.settings/org.eclipse.jdt.core.prefs
@@ -0,0 +1,5 @@
+#Tue Oct 27 11:15:30 BRST 2009
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.5
+org.eclipse.jdt.core.compiler.compliance=1.5
+org.eclipse.jdt.core.compiler.source=1.5
diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/.settings/org.maven.ide.eclipse.prefs b/sandbox/dougsleite/policy-guardianExceptionHandling/.settings/org.maven.ide.eclipse.prefs
new file mode 100644
index 0000000000..fdf8a00902
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/.settings/org.maven.ide.eclipse.prefs
@@ -0,0 +1,9 @@
+#Tue Oct 27 11:15:01 BRST 2009
+activeProfiles=
+eclipse.preferences.version=1
+fullBuildGoals=process-test-resources
+includeModules=false
+resolveWorkspaceProjects=true
+resourceFilterGoals=process-resources resources\:testResources
+skipCompilerPlugin=true
+version=1
diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/LICENSE b/sandbox/dougsleite/policy-guardianExceptionHandling/LICENSE
new file mode 100644
index 0000000000..6e529a25c4
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/LICENSE
@@ -0,0 +1,205 @@
+

+                                 Apache License

+                           Version 2.0, January 2004

+                        http://www.apache.org/licenses/

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+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

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+   1. Definitions.

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+   4. Redistribution. You may reproduce and distribute copies of the

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+      You may add Your own copyright statement to Your modifications and

+      may provide additional or different license terms and conditions

+      for use, reproduction, or distribution of Your modifications, or

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+      reproduction, and distribution of the Work otherwise complies with

+      the conditions stated in this License.

+

+   5. Submission of Contributions. Unless You explicitly state otherwise,

+      any Contribution intentionally submitted for inclusion in the Work

+      by You to the Licensor shall be under the terms and conditions of

+      this License, without any additional terms or conditions.

+      Notwithstanding the above, nothing herein shall supersede or modify

+      the terms of any separate license agreement you may have executed

+      with Licensor regarding such Contributions.

+

+   6. Trademarks. This License does not grant permission to use the trade

+      names, trademarks, service marks, or product names of the Licensor,

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+      agreed to in writing, Licensor provides the Work (and each

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diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/NOTICE b/sandbox/dougsleite/policy-guardianExceptionHandling/NOTICE
new file mode 100644
index 0000000000..1325efd8bf
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/NOTICE
@@ -0,0 +1,6 @@
+${pom.name}

+Copyright (c) 2005 - 2008 The Apache Software Foundation

+

+This product includes software developed by

+The Apache Software Foundation (http://www.apache.org/).

+

diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/pom.xml b/sandbox/dougsleite/policy-guardianExceptionHandling/pom.xml
new file mode 100644
index 0000000000..3ccf37efb7
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/pom.xml
@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="UTF-8"?>

+<!--

+ * 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.    

+-->

+<project>

+    <modelVersion>4.0.0</modelVersion>

+    <parent>

+        <groupId>org.apache.tuscany.sca</groupId>

+        <artifactId>tuscany-modules</artifactId>

+        <version>1.6-SNAPSHOT</version>

+        <relativePath>../pom.xml</relativePath>

+    </parent>

+    <artifactId>tuscany-policy-guardianExceptionHandling</artifactId>

+    <name>Apache Tuscany SCA Guardian Exception Handling Policy Model</name>

+    

+    <dependencies>

+    	        

+        <dependency>

+            <groupId>org.apache.tuscany.sca</groupId>

+            <artifactId>tuscany-contribution</artifactId>

+            <version>1.6-SNAPSHOT</version>

+        </dependency>

+

+        <dependency>

+            <groupId>org.apache.tuscany.sca</groupId>

+            <artifactId>tuscany-assembly-xml</artifactId>

+            <version>1.6-SNAPSHOT</version>

+        </dependency>

+

+        <dependency>

+            <groupId>org.apache.tuscany.sca</groupId>

+            <artifactId>tuscany-policy</artifactId>

+            <version>1.6-SNAPSHOT</version>

+        </dependency>

+

+        <dependency>

+            <groupId>org.apache.tuscany.sca</groupId>

+            <artifactId>tuscany-contribution-impl</artifactId>

+            <version>1.6-SNAPSHOT</version>

+            <scope>test</scope>

+        </dependency>

+        <dependency>

+            <groupId>org.apache.tuscany.sca</groupId>

+            <artifactId>tuscany-host-embedded</artifactId>

+            <version>1.6-SNAPSHOT</version>

+            <scope>test</scope>

+            <type>jar</type>

+        </dependency>

+        <dependency>

+            <groupId>org.apache.tuscany.sca</groupId>

+            <artifactId>tuscany-implementation-guardian</artifactId>

+            <version>1.6-SNAPSHOT</version>

+        </dependency>

+

+        <dependency>

+            <groupId>org.apache.tuscany.sca</groupId>

+            <artifactId>tuscany-implementation-java</artifactId>

+            <version>1.6-SNAPSHOT</version>

+        </dependency>

+    </dependencies>

+

+    <build>

+        <plugins>

+            <plugin>

+                <groupId>org.apache.felix</groupId>

+                <artifactId>maven-bundle-plugin</artifactId>

+

+                <configuration>

+                    <instructions>

+                        <Bundle-Version>${tuscany.version}</Bundle-Version>

+                        <Bundle-SymbolicName>org.apache.tuscany.sca.policy.guardianExceptionHandling</Bundle-SymbolicName>

+                        <Bundle-Description>${pom.name}</Bundle-Description>

+                        <Export-Package>org.apache.tuscany.sca.policy.guardianExceptionHandling*</Export-Package>

+                    </instructions>

+                </configuration>

+            </plugin>

+        </plugins>

+    </build>

+

+</project>

+

+

+

+

+

diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianExceptionHandlingImplementationPolicyProvider.java b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianExceptionHandlingImplementationPolicyProvider.java
new file mode 100644
index 0000000000..01ca3a0166
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianExceptionHandlingImplementationPolicyProvider.java
@@ -0,0 +1,59 @@
+/*
+ * 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.policy.guardianExceptionHandling;
+
+import org.apache.tuscany.sca.invocation.MessageFactory;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Interceptor;
+import org.apache.tuscany.sca.invocation.Phase;
+import org.apache.tuscany.sca.provider.PolicyProvider;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+
+public class GuardianExceptionHandlingImplementationPolicyProvider implements PolicyProvider {
+
+    private MessageFactory messageFactory;
+    private RuntimeComponent component;
+    private RuntimeComponentService service;
+    private Binding binding;
+
+    public GuardianExceptionHandlingImplementationPolicyProvider(ExtensionPointRegistry extensionPoints,
+            RuntimeComponent component,
+            RuntimeComponentService service,
+            Binding binding) {
+        ModelFactoryExtensionPoint modelFactories = extensionPoints.getExtensionPoint(ModelFactoryExtensionPoint.class);
+        messageFactory = modelFactories.getFactory(MessageFactory.class);
+
+        this.component = component;
+        this.service = service;
+        this.binding = binding;
+    }
+    
+    public Interceptor createInterceptor(Operation operation) {
+
+        return new GuardianExceptionHandlingPolicyInterceptor(service, service.getRuntimeWire(binding));
+    }
+
+    public String getPhase() {
+        return Phase.IMPLEMENTATION_POLICY;
+    }
+}
diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianExceptionHandlingPolicy.java b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianExceptionHandlingPolicy.java
new file mode 100644
index 0000000000..a4179bd666
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianExceptionHandlingPolicy.java
@@ -0,0 +1,38 @@
+/*
+ * 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.policy.guardianExceptionHandling;
+
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.policy.Policy;
+
+public class GuardianExceptionHandlingPolicy implements Policy {
+
+    public QName getSchemaName() {
+        return null;
+    }
+
+    public boolean isUnresolved() {
+        return false;
+    }
+
+    public void setUnresolved(boolean unresolved) {
+    }
+}
diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianExceptionHandlingPolicyDefinitionsProvider.java b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianExceptionHandlingPolicyDefinitionsProvider.java
new file mode 100644
index 0000000000..b1ca3f2edc
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianExceptionHandlingPolicyDefinitionsProvider.java
@@ -0,0 +1,61 @@
+/*
+ * 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.policy.guardianExceptionHandling;
+
+import java.net.URI;
+import java.net.URL;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessorExtensionPoint;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.definitions.SCADefinitions;
+import org.apache.tuscany.sca.provider.SCADefinitionsProvider;
+import org.apache.tuscany.sca.provider.SCADefinitionsProviderException;
+
+public class GuardianExceptionHandlingPolicyDefinitionsProvider implements SCADefinitionsProvider {
+    private String definitionsFile = "org/apache/tuscany/sca/policy/guardianExceptionHandling/definitions.xml";
+    URLArtifactProcessor urlArtifactProcessor = null;
+    
+    public GuardianExceptionHandlingPolicyDefinitionsProvider(ExtensionPointRegistry registry) {
+        URLArtifactProcessorExtensionPoint documentProcessors = registry.getExtensionPoint(URLArtifactProcessorExtensionPoint.class);
+        urlArtifactProcessor = (URLArtifactProcessor)documentProcessors.getProcessor(SCADefinitions.class);
+    }
+
+    public SCADefinitions getSCADefinition() throws SCADefinitionsProviderException {
+        // Allow privileged access to load resource. Requires RuntimePermssion in security policy.
+        URL definitionsFileUrl = AccessController.doPrivileged(new PrivilegedAction<URL>() {
+            public URL run() {
+                return getClass().getClassLoader().getResource(definitionsFile);
+            }
+        });
+        
+        try {
+            URI uri = new URI(definitionsFile);
+            return (SCADefinitions)urlArtifactProcessor.read(null, 
+                                                             uri, 
+                                                             definitionsFileUrl);
+        } catch ( Exception e ) {
+            throw new SCADefinitionsProviderException(e);
+        }
+    }
+
+}
diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianExceptionHandlingPolicyInterceptor.java b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianExceptionHandlingPolicyInterceptor.java
new file mode 100644
index 0000000000..a98b300aae
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianExceptionHandlingPolicyInterceptor.java
@@ -0,0 +1,172 @@
+/*
+ * 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.policy.guardianExceptionHandling;
+
+import java.util.List;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import org.apache.tuscany.sca.implementation.guardian.common.Context;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Interceptor;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.Message;
+import org.apache.tuscany.sca.provider.ImplementationProvider;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeWire;
+import org.apache.tuscany.sca.invocation.MessageFactory;
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.implementation.guardian.GuardianMember;
+import org.apache.tuscany.sca.implementation.guardian.common.GlobalException;
+import org.apache.tuscany.sca.implementation.guardian.common.GlobalExceptionInterface;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+
+public class GuardianExceptionHandlingPolicyInterceptor implements Interceptor {
+
+    public static final String ENABLE_CONTEXT = "enableContext";
+    public static final String REMOVE_CONTEXT = "removeContext";
+    public static final String GTHROW = "gthrow";
+    public static final String PROPAGATE = "propagate";
+    public static final String CHECK_EXCEPTION_STATUS = "checkExceptionStatus";
+    private Invoker next;
+    private RuntimeWire runtimeWire;
+    private RuntimeComponentService service;
+
+    public GuardianExceptionHandlingPolicyInterceptor(RuntimeComponentService service, RuntimeWire runtimeWire) {
+        super();
+        this.runtimeWire = runtimeWire;
+        this.service = service;
+    }
+
+    //IMPLEMENTAR A LOGICA ENTRE {P <-> GM <-> GG}
+    public Message invoke(Message msg) {
+
+        Class targetComponentImplClass = msg.getTo().getComponent().getImplementation().getClass();
+
+        String implementationGuardian = "org.apache.tuscany.sca.implementation.guardian.impl.GuardianGroupImplementationImpl";
+        Message responseMsg = null;
+
+//        //Test the target component - must be a implemenation.guardian
+//        try {
+//            if (!targetComponentImplClass.equals(Class.forName(implementationJava))) {
+//                throw new InvalidPolicyAssociationException("The target component must be a implementation.guardian");
+//            }
+//        } catch (ClassNotFoundException ex) {
+//            Logger.getLogger(GuardianExceptionHandlingPolicyInterceptor.class.getName()).log(Level.SEVERE, null, ex);
+//        }
+
+        try {
+            if (targetComponentImplClass.equals(Class.forName(implementationGuardian))) {
+
+                String msgOperationName = msg.getOperation().getName();
+                String componentName = msg.getFrom().getComponent().getName();
+
+                GuardianMemberFactoryImpl factory = GuardianMemberFactoryImpl.getInstance();
+                GuardianMember gm = factory.createGuardianMember(componentName, msg, this);
+
+                Object msgBody = msg.getBody();
+
+                if (msgOperationName.equals(ENABLE_CONTEXT)) {
+                    Context context = (Context)((Object[]) msg.getBody())[0];
+                    gm.enableContext(context);
+                    msg.setBody(null);
+                    return msg;
+                } else if (msgOperationName.equals(REMOVE_CONTEXT)) {
+                    Context removedContext = gm.removeContext();
+                    msg.setBody(removedContext);
+
+                    //All the contexts were removed
+                    if(gm.getCurrentContext().equals(Context.INIT_CONTEXT)) {
+                        factory.removeGuardianMember(componentName, msg, this);
+                    }
+
+                    return msg;
+                } else if (msgOperationName.equals(GTHROW)) {
+                    GlobalExceptionInterface ex = (GlobalExceptionInterface) ((Object[]) msgBody)[0];
+                    List<String> participantList = (List<String>) ((Object[]) msgBody)[1];
+                    gm.gthrow(ex, participantList);
+                    msg.setBody(null);
+                    return msg;
+                } else if (msgOperationName.equals(PROPAGATE)) {
+                    GlobalExceptionInterface ex = (GlobalExceptionInterface) ((Object[]) msgBody)[0];
+                    boolean response = gm.propagate(ex);
+                    msg.setBody(response);
+                    return msg;
+                } else if (msgOperationName.equals(CHECK_EXCEPTION_STATUS)) {
+                    try {
+                        gm.checkExceptionStatus();
+                        msg.setBody(null);
+                    } catch (GlobalException ex) {
+                        msg.setFaultBody(ex);
+                    }
+                    return msg;
+                }
+            } else {
+                //throw new UnsupportedOperationException("Invocation of " + msgOperationName + " is not allowed");
+                responseMsg = getNext().invoke(msg);
+            }
+        } catch (ClassNotFoundException ex) {
+            Logger.getLogger(GuardianExceptionHandlingPolicyInterceptor.class.getName()).log(Level.SEVERE, null, ex);
+        }
+
+        return responseMsg;
+    }
+
+    public Message invokeGuardianGroupOperation(String operationName, Message msg) {
+
+        //Changing the operation
+        Operation desiredOperation = findOperation(operationName);
+
+        msg.setOperation(desiredOperation);
+
+        RuntimeComponent component = msg.getTo().getComponent();
+        ImplementationProvider implProvider = component.getImplementationProvider();
+
+        Message responseMsg = implProvider.createInvoker(this.service, desiredOperation).invoke(msg);
+
+        return responseMsg;
+    }
+
+    private Operation findOperation(String method) {
+        if (method.contains(".")) {
+            method = method.substring(method.lastIndexOf(".") + 1);
+        }
+
+        List<Operation> operations = runtimeWire.getTarget().getInterfaceContract().getInterface().getOperations();
+        
+        Operation result = null;
+        for (Operation o : operations) {
+            if (o.getName().equalsIgnoreCase(method)) {
+                result = o;
+                break;
+            }
+        }
+
+        return result;
+    }
+
+    
+
+    public Invoker getNext() {
+        return next;
+    }
+
+    public void setNext(Invoker next) {
+        this.next = next;
+    }
+}
diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianExceptionHandlingPolicyProviderFactory.java b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianExceptionHandlingPolicyProviderFactory.java
new file mode 100644
index 0000000000..bd2d67ad6f
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianExceptionHandlingPolicyProviderFactory.java
@@ -0,0 +1,58 @@
+/*
+ * 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.policy.guardianExceptionHandling;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Implementation;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.provider.PolicyProvider;
+import org.apache.tuscany.sca.provider.PolicyProviderFactory;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+
+public class GuardianExceptionHandlingPolicyProviderFactory implements PolicyProviderFactory<GuardianExceptionHandlingPolicy> {
+
+    private ExtensionPointRegistry extensionPoints;
+
+    public GuardianExceptionHandlingPolicyProviderFactory(ExtensionPointRegistry registry) {
+        super();
+        this.extensionPoints = registry;
+    }
+
+    public PolicyProvider createImplementationPolicyProvider(RuntimeComponent component, Implementation implementation) {
+        return null;
+    }
+
+    public PolicyProvider createReferencePolicyProvider(RuntimeComponent component,
+            RuntimeComponentReference reference,
+            Binding binding) {
+        return null;
+    }
+
+    public PolicyProvider createServicePolicyProvider(RuntimeComponent component,
+            RuntimeComponentService service,
+            Binding binding) {
+        return new GuardianExceptionHandlingImplementationPolicyProvider(extensionPoints, component, service, binding);
+    }
+
+    public Class getModelType() {
+        return null;
+    }
+}
diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianMemberFactoryImpl.java b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianMemberFactoryImpl.java
new file mode 100644
index 0000000000..2f5e9617ed
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianMemberFactoryImpl.java
@@ -0,0 +1,80 @@
+/*
+ * 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.policy.guardianExceptionHandling;
+
+import java.util.HashMap;
+import java.util.Map;
+import org.apache.tuscany.sca.implementation.guardian.GuardianMember;
+import org.apache.tuscany.sca.invocation.Message;
+
+public class GuardianMemberFactoryImpl {
+
+    Map<String, GuardianMember> guardianMembers;
+    private static GuardianMemberFactoryImpl instance = null;
+
+    public static GuardianMemberFactoryImpl getInstance() {
+        if (instance == null) {
+            instance = new GuardianMemberFactoryImpl();
+        }
+        return instance;
+    }
+
+    protected GuardianMemberFactoryImpl() {
+        guardianMembers = new HashMap<String, GuardianMember>();
+    }
+
+    public GuardianMember createGuardianMember(String componentName, Message msg, GuardianExceptionHandlingPolicyInterceptor interceptor) {
+        GuardianMemberImpl gm = (GuardianMemberImpl) guardianMembers.get(componentName);
+
+        if (gm == null) {
+            gm = new GuardianMemberImpl(componentName, msg, interceptor);
+            guardianMembers.put(componentName, gm);
+
+            //Inform the Guardian Group of the new Guardian Member
+            Object msgBody = msg.getBody();
+
+            msg.setBody(gm);
+            interceptor.invokeGuardianGroupOperation("addGuardianMember", msg);
+
+            msg.setBody(msgBody);
+        }
+
+        gm.setMessage(msg);
+        gm.setGuardianExceptionHandlingPolicyInterceptor(interceptor);
+
+        return gm;
+    }
+
+    public GuardianMember removeGuardianMember(String componentName, Message msg, GuardianExceptionHandlingPolicyInterceptor interceptor) {
+
+        GuardianMember gm = guardianMembers.remove(componentName);
+
+        if (gm != null) {
+
+            Object msgBody = msg.getBody();
+
+            msg.setBody(gm);
+            interceptor.invokeGuardianGroupOperation("removeGuardianMember", msg);
+
+            msg.setBody(msgBody);
+        }
+
+        return gm;
+    }
+}
diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianMemberImpl.java b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianMemberImpl.java
new file mode 100644
index 0000000000..5e9ae7853c
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/GuardianMemberImpl.java
@@ -0,0 +1,186 @@
+/*
+ * 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.policy.guardianExceptionHandling;
+
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Queue;
+import java.util.Stack;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import org.apache.tuscany.sca.implementation.guardian.common.GlobalExceptionInterface;
+import org.apache.tuscany.sca.implementation.guardian.GuardianGroup;
+import org.apache.tuscany.sca.implementation.guardian.GuardianMember;
+import org.apache.tuscany.sca.implementation.guardian.common.Context;
+import org.apache.tuscany.sca.implementation.guardian.common.GlobalException;
+import org.apache.tuscany.sca.implementation.guardian.common.JoinException;
+import org.apache.tuscany.sca.implementation.guardian.common.SuspendException;
+import org.apache.tuscany.sca.invocation.Message;
+
+public class GuardianMemberImpl implements GuardianMember {
+
+    private int participantState;
+    private Stack<Context> contextList;
+    private Queue<GlobalException> exceptionQueue;
+    private String id;
+    
+    //FIXME: Review the usage of this variable
+    private boolean exceptionThrown;
+    private Message msg;
+    private GuardianExceptionHandlingPolicyInterceptor interceptor;
+
+    protected GuardianMemberImpl(String componentName, Message msg, GuardianExceptionHandlingPolicyInterceptor interceptor) {
+        contextList = new Stack<Context>();
+        contextList.add(Context.INIT_CONTEXT);
+        exceptionQueue = new LinkedList<GlobalException>();
+        participantState = GuardianGroup.NORMAL_PARTICIPANT_STATE;
+        exceptionThrown = false;
+
+        this.id = componentName;
+        this.msg = msg;
+        this.interceptor = interceptor;
+    }
+
+    public void setGuardianExceptionHandlingPolicyInterceptor(GuardianExceptionHandlingPolicyInterceptor interceptor) {
+        this.interceptor = interceptor;
+    }
+
+    public GuardianExceptionHandlingPolicyInterceptor getGuardianExceptionHandlingPolicyInterceptor() {
+        return this.interceptor;
+    }
+
+    public void setMessage(Message msg) {
+        this.msg = msg;
+    }
+
+    public Message getMessage() {
+        return this.msg;
+    }
+
+    public void addException(GlobalException ex) {
+        exceptionQueue.add(ex);
+    }
+
+    public Context getCurrentContext() {
+        return contextList.peek();
+    }
+
+    public void enableContext(Context context) {
+        //Update the context list with the related set of exceptions
+
+        if (contextList.size() == 1) {
+            contextList.push(context);
+
+            JoinException ex = new JoinException();
+            ex.setSignalingContext(context);
+            ex.putSignalingParticipant(getParticipantIdentifier());
+            gthrow(ex, null);
+        } else {
+            contextList.push(context);
+        }
+
+    }
+
+    public Context removeContext() {
+//        if (contextList.size() > 1) {
+//            return contextList.pop();
+//        }
+        return contextList.pop();
+    }
+
+    //If participantList is null then signal to ALL participants
+    public void gthrow(GlobalExceptionInterface ex, List<String> participantList) {
+        //1)Block the participant until raise an exception
+
+        if (!(ex instanceof SuspendException)) {
+            //Set the exception's parameters
+            ex.setSignalingContext(getCurrentContext());
+            ex.putSignalingParticipant(getParticipantIdentifier());
+
+            //Prepare the parameters
+            Object[] params = {ex, participantList};
+            msg.setBody(params);
+
+            interceptor.invokeGuardianGroupOperation("gthrow", msg);
+            //guardianGroup.gthrow(ex, participantList);
+
+            exceptionThrown = true;
+        } else {
+            setParticipantState(GuardianGroup.SUSPENDED_PARTICIPANT_STATE);
+        }
+    }
+
+    public boolean propagate(GlobalExceptionInterface ex) {
+        //1)Compares the current context with the exception's target context
+        return !getCurrentContext().equals(ex.getTargetContext());
+    }
+
+    public void checkExceptionStatus() throws GlobalException {
+
+        //Blocks until the state be diferent the SUSPENDED_STATE
+        while (participantState == GuardianGroup.SUSPENDED_PARTICIPANT_STATE && exceptionThrown) {
+            System.out.println(getParticipantIdentifier() + ": I am blocked!");
+            try {
+                Thread.sleep(5000);
+            } catch (InterruptedException ex) {
+                Logger.getLogger(GuardianMemberImpl.class.getName()).log(Level.SEVERE, null, ex);
+            }
+        }
+        exceptionThrown = false;
+        System.out.println(getParticipantIdentifier() + ": I am not blocked!");
+
+        GlobalException exc;
+
+        if ((exc = exceptionQueue.peek()) == null) {
+            System.out.println(getParticipantIdentifier() + "#No exception on exception queue");
+            return;
+        }
+
+        //Check if ex.targetContext() matches the participant id
+        //Eg. ex.targetContext(): Main and participant id: Init.Main.Backup -> should thrown the exception
+        //Test if the exception should be thrown in the target context
+        for (Context c : contextList) {
+            if (exc.getTargetContext().equals(c) && (c.equals(Context.INIT_CONTEXT) || c.getExceptionList().contains(exc.getClass()))) {
+                System.out.println(getParticipantIdentifier() + "#Returning an exception");
+                exceptionQueue.poll();
+                throw exc;
+            }
+        }
+
+        return;
+    }
+
+    public String getParticipantIdentifier() {
+        //1) Return the participant identifier -> context list dot separated
+        StringBuffer participantIdentifier = new StringBuffer();
+        participantIdentifier.append(this.id);
+        for (int i = 0; i < contextList.size(); i++) {
+            participantIdentifier.append("." + contextList.get(i).getName());
+        }
+        return participantIdentifier.toString();
+    }
+
+    public int getParticipantState() {
+        return participantState;
+    }
+
+    public void setParticipantState(int state) {
+        this.participantState = state;
+    }
+}
diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/InvalidPolicyAssociationException.java b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/InvalidPolicyAssociationException.java
new file mode 100644
index 0000000000..183e60c8be
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/java/org/apache/tuscany/sca/policy/guardianExceptionHandling/InvalidPolicyAssociationException.java
@@ -0,0 +1,38 @@
+/*
+ * 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.policy.guardianExceptionHandling;
+
+public class InvalidPolicyAssociationException extends RuntimeException {
+
+    public InvalidPolicyAssociationException() {
+        super();
+    }
+
+    public InvalidPolicyAssociationException(String message) {
+        super(message);
+    }
+
+    public InvalidPolicyAssociationException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    public InvalidPolicyAssociationException(Throwable cause) {
+        super(cause);
+    }
+}
diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.PolicyProviderFactory b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.PolicyProviderFactory
new file mode 100644
index 0000000000..7365a52151
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.PolicyProviderFactory
@@ -0,0 +1,19 @@
+# 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. 

+

+# Implementation class for the policy extension

+org.apache.tuscany.sca.policy.guardianExceptionHandling.GuardianExceptionHandlingPolicyProviderFactory;model=org.apache.tuscany.sca.policy.guardianExceptionHandling.GuardianExceptionHandlingPolicy

diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.SCADefinitionsProvider b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.SCADefinitionsProvider
new file mode 100644
index 0000000000..30c8b4f8fd
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.SCADefinitionsProvider
@@ -0,0 +1,19 @@
+# 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. 
+
+# Implementation class for SCA Definitions Providers
+org.apache.tuscany.sca.policy.guardianExceptionHandling.GuardianExceptionHandlingPolicyDefinitionsProvider
\ No newline at end of file
diff --git a/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/resources/org/apache/tuscany/sca/policy/guardianExceptionHandling/definitions.xml b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/resources/org/apache/tuscany/sca/policy/guardianExceptionHandling/definitions.xml
new file mode 100644
index 0000000000..94bc0c023a
--- /dev/null
+++ b/sandbox/dougsleite/policy-guardianExceptionHandling/src/main/resources/org/apache/tuscany/sca/policy/guardianExceptionHandling/definitions.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="ASCII"?>

+<!--

+ * 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.    

+-->

+<definitions xmlns="http://www.osoa.org/xmlns/sca/1.0"

+ 			targetNamespace="http://tuscany.apache.org/xmlns/sca/1.0"

+ 			xmlns:sca="http://www.osoa.org/xmlns/sca/1.0"

+ 			xmlns:tuscany="http://tuscany.apache.org/xmlns/sca/1.0">

+

+	<!-- Policy Intents Defined by the SCA Runtime -->

+	<intent name="guardianExceptionHandling" constrains="sca:implementation.java/sca:reference">

+		<description>

+			All messages to the guardian group implementation will be intercepted by the guardian member

+		</description>

+	</intent>

+</definitions>
\ No newline at end of file