001/**
002 * Copyright 2005-2017 The Kuali Foundation
003 *
004 * Licensed under the Educational Community License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.opensource.org/licenses/ecl2.php
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.kuali.rice.ksb.messaging.bam;
017
018import org.kuali.rice.core.api.config.property.Config;
019import org.kuali.rice.core.api.config.property.ConfigContext;
020import org.kuali.rice.core.api.util.ClassLoaderUtils;
021import org.kuali.rice.core.api.util.ContextClassLoaderProxy;
022import org.kuali.rice.core.api.util.reflect.BaseTargetedInvocationHandler;
023import org.kuali.rice.ksb.api.bus.ServiceConfiguration;
024import org.kuali.rice.ksb.messaging.bam.service.BAMService;
025import org.kuali.rice.ksb.service.KSBServiceLocator;
026
027import java.lang.reflect.InvocationTargetException;
028import java.lang.reflect.Method;
029import java.lang.reflect.Proxy;
030
031
032/**
033 * A client-side proxy for that records an entry in the BAM for invocations
034 * on the proxied service.
035 *
036 * @see BAMService
037 *
038 * @author Kuali Rice Team (rice.collab@kuali.org)
039 */
040public class BAMClientProxy extends BaseTargetedInvocationHandler {
041
042        private ServiceConfiguration serviceConfiguration;
043        
044        private BAMClientProxy(Object target, ServiceConfiguration serviceConfiguration) {
045                super(target);
046                this.serviceConfiguration = serviceConfiguration;
047        }
048        
049        public static boolean isBamSupported() {
050                return KSBServiceLocator.getBAMService() != null && Boolean.valueOf(ConfigContext.getCurrentContextConfig().getProperty(Config.BAM_ENABLED));
051        }
052        
053        public static Object wrap(Object target, ServiceConfiguration serviceConfiguration) {
054                if (!isBamSupported()) {
055                        return target;
056                }
057                return Proxy.newProxyInstance(ClassLoaderUtils.getDefaultClassLoader(), ContextClassLoaderProxy.getInterfacesToProxy(target), new BAMClientProxy(target, serviceConfiguration));
058        }
059        
060        protected Object invokeInternal(Object proxyObject, Method method, Object[] arguments) throws Throwable {
061                BAMTargetEntry bamTargetEntry = KSBServiceLocator.getBAMService().recordClientInvocation(this.serviceConfiguration, getTarget(), method, arguments);
062                try {
063                        return method.invoke(getTarget(), arguments);   
064                } catch (Throwable throwable) {
065                        if (throwable instanceof InvocationTargetException) {
066                                throwable = throwable.getCause();
067                        }
068                        KSBServiceLocator.getBAMService().recordClientInvocationError(throwable, bamTargetEntry);
069                        throw throwable;
070                }
071        }
072}