001 /* 002 * Copyright 2002-2005 the original author or authors. 003 * 004 * Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0 009 * 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 */ 016 017 package org.jencks.interceptor; 018 019 import org.aopalliance.intercept.MethodInterceptor; 020 import org.aopalliance.intercept.MethodInvocation; 021 import org.apache.geronimo.transaction.DefaultInstanceContext; 022 import org.apache.geronimo.transaction.InstanceContext; 023 import org.apache.geronimo.transaction.TrackedConnectionAssociator; 024 025 import java.util.HashSet; 026 import java.util.Set; 027 028 /** 029 * This servlet filter is used to enter in a transactional context 030 * automtically at every servlet call and exit of it when the response 031 * is sent back to the client. 032 * 033 * @author Thierry Templier 034 * @see TrackedConnectionAssociator#enter(InstanceContext) 035 * @see TrackedConnectionAssociator#exit(InstanceContext) 036 * @see InstanceContext 037 * @see DefaultInstanceContext 038 */ 039 public class TransactionContextInterceptor implements MethodInterceptor { 040 041 private TrackedConnectionAssociator associator; 042 043 /** 044 * This is the central method of the filter which allows the 045 * request to enter in a transactionnal context and exit when 046 * the request is sent back to the client. 047 * 048 * @see #enterContext(Set, Set) 049 * @see #exitContext(InstanceContext) 050 */ 051 public Object invoke(MethodInvocation invocation) throws Throwable { 052 Set unshareableResources = new HashSet(); 053 Set applicationManagedSecurityResources = new HashSet(); 054 InstanceContext context = associator.enter( 055 new DefaultInstanceContext(unshareableResources, applicationManagedSecurityResources)); 056 Object returnValue = invocation.proceed(); 057 associator.exit(context); 058 return returnValue; 059 } 060 061 /** 062 * Set the TrackedConnectionAssociator instance to allow the bean 063 * to enter and exit a transactional context. 064 */ 065 public void setAssociator(TrackedConnectionAssociator associator) { 066 this.associator = associator; 067 } 068 069 }