org.springframework.transaction.interceptor.TransactionInterceptor Maven / Gradle / Ivy
/*
* Copyright 2002-2004 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.springframework.transaction.interceptor;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
/**
* AOP Alliance MethodInterceptor providing declarative transaction
* management using the common Spring transaction infrastructure.
*
* Derives from the TransactionAspectSupport class.
* That class contains the necessary calls into Spring's underlying
* transaction API: subclasses such as this are responsible for calling
* superclass methods such as createTransactionIfNecessary()
* in the correct order, in the event of normal invocation return or an exception.
*
TransactionInterceptors are thread-safe.
*
* @author Rod Johnson
* @author Juergen Hoeller
* @see TransactionProxyFactoryBean
* @see org.springframework.aop.framework.ProxyFactoryBean
* @see org.springframework.transaction.interceptor.TransactionAspectSupport
* @see org.springframework.transaction.PlatformTransactionManager
*/
public class TransactionInterceptor extends TransactionAspectSupport implements MethodInterceptor {
public Object invoke(MethodInvocation invocation) throws Throwable {
// Work out the target class: may be null.
// The TransactionAttributeSource should be passed the target class
// as well as the method, which may be from an interface
Class targetClass = (invocation.getThis() != null) ? invocation.getThis().getClass() : null;
// Create transaction if necessary
TransactionInfo txInfo = createTransactionIfNecessary(invocation.getMethod(), targetClass);
Object retVal = null;
try {
// This is an around advice.
// Invoke the next interceptor in the chain.
// This will normally result in a target object being invoked.
retVal = invocation.proceed();
}
catch (Throwable ex) {
// target invocation exception
doCloseTransactionAfterThrowing(txInfo, ex);
throw ex;
}
finally {
doFinally(txInfo);
}
doCommitTransactionAfterReturning(txInfo);
return retVal;
}
}