/*
* Copyright 2002-2005 the original author or authors.
*
* Licensed 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.jencks.interceptor;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.apache.geronimo.transaction.DefaultInstanceContext;
import org.apache.geronimo.transaction.InstanceContext;
import org.apache.geronimo.transaction.TrackedConnectionAssociator;
import java.util.HashSet;
import java.util.Set;
/**
* This servlet filter is used to enter in a transactional context
* automtically at every servlet call and exit of it when the response
* is sent back to the client.
*
* @author Thierry Templier
* @see TrackedConnectionAssociator#enter(InstanceContext)
* @see TrackedConnectionAssociator#exit(InstanceContext)
* @see InstanceContext
* @see DefaultInstanceContext
*/
public class TransactionContextInterceptor implements MethodInterceptor {
private TrackedConnectionAssociator associator;
/**
* This is the central method of the filter which allows the
* request to enter in a transactionnal context and exit when
* the request is sent back to the client.
*
* @see #enterContext(Set, Set)
* @see #exitContext(InstanceContext)
*/
public Object invoke(MethodInvocation invocation) throws Throwable {
Set unshareableResources = new HashSet();
Set applicationManagedSecurityResources = new HashSet();
InstanceContext context = associator.enter(
new DefaultInstanceContext(unshareableResources, applicationManagedSecurityResources));
Object returnValue = invocation.proceed();
associator.exit(context);
return returnValue;
}
/**
* Set the TrackedConnectionAssociator instance to allow the bean
* to enter and exit a transactional context.
*/
public void setAssociator(TrackedConnectionAssociator associator) {
this.associator = associator;
}
}