/*

  * Copyright 2006-2011 The Kuali Foundation

  *

  * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php

  *

  * 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.kuali.rice.ksb.messaging.bam;

 import java.lang.reflect.InvocationTargetException;

 import java.lang.reflect.Method;

 import java.lang.reflect.Proxy;

 import org.kuali.rice.core.api.config.property.Config;

 import org.kuali.rice.core.api.config.property.ConfigContext;

 import org.kuali.rice.core.impl.resourceloader.ContextClassLoaderProxy;

 import org.kuali.rice.core.util.ClassLoaderUtils;

 import org.kuali.rice.core.util.reflect.BaseTargetedInvocationHandler;

 import org.kuali.rice.ksb.api.bus.ServiceConfiguration;

 import org.kuali.rice.ksb.impl.registry.ServiceInfoBo;

 import org.kuali.rice.ksb.messaging.bam.service.BAMService;

 import org.kuali.rice.ksb.service.KSBServiceLocator;

 /**

  * A client-side proxy for that records an entry in the BAM for invocations

  * on the proxied service.

  *

  * @see BAMService

  *

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class BAMClientProxy extends BaseTargetedInvocationHandler {

         private ServiceConfiguration serviceConfiguration;

         private BAMClientProxy(Object target, ServiceConfiguration serviceConfiguration) {

                 super(target);

                 this.serviceConfiguration = serviceConfiguration;

         }

         public static boolean isBamSupported() {

                 return KSBServiceLocator.getBAMService() != null && Boolean.valueOf(ConfigContext.getCurrentContextConfig().getProperty(Config.BAM_ENABLED));

         }

         public static Object wrap(Object target, ServiceConfiguration serviceConfiguration) {

                 if (!isBamSupported()) {

                         return target;

                 }

                 return Proxy.newProxyInstance(ClassLoaderUtils.getDefaultClassLoader(), ContextClassLoaderProxy.getInterfacesToProxy(target), new BAMClientProxy(target, serviceConfiguration));

         }

         protected Object invokeInternal(Object proxyObject, Method method, Object[] arguments) throws Throwable {

                 BAMTargetEntry bamTargetEntry = KSBServiceLocator.getBAMService().recordClientInvocation(this.serviceConfiguration, getTarget(), method, arguments);

                 try {

                         return method.invoke(getTarget(), arguments);        

                 } catch (Throwable throwable) {

                         if (throwable instanceof InvocationTargetException) {

                                 throwable = throwable.getCause();

                         }

                         KSBServiceLocator.getBAMService().recordClientInvocationError(throwable, bamTargetEntry);

                         throw throwable;

                 }

         }

 }