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/*
* 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;
}
}
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