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Spring Framework example source code file (AbstractTransactionAspect.aj)

This example Spring Framework source code file (AbstractTransactionAspect.aj) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

abstracttransactionaspect, abstracttransactionaspect, failed, method, methodsignature, methodsignature, reflection, suppressajwarnings, suppressajwarnings, throwable, transactionaspectsupport, transactionaspectsupport, transactioninfo

The Spring Framework AbstractTransactionAspect.aj source code

/*
 * Copyright 2002-2007 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.aspectj;

import java.lang.reflect.Method;

import org.aspectj.lang.annotation.SuppressAjWarnings;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.transaction.interceptor.TransactionAspectSupport;
import org.springframework.transaction.interceptor.TransactionAttributeSource;

/**
 * Abstract superaspect for AspectJ transaction aspects. Concrete
 * subaspects will implement the <code>transactionalMethodExecution()
 * pointcut using a strategy such as Java 5 annotations.
 *
 * <p>Suitable for use inside or outside the Spring IoC container.
 * Set the "transactionManager" property appropriately, allowing
 * use of any transaction implementation supported by Spring.
 *
 * <p>NB: If a method implements an interface that is itself
 * transactionally annotated, the relevant Spring transaction attribute
 * will <i>not be resolved. This behavior will vary from that of Spring AOP
 * if proxying an interface (but not when proxying a class). We recommend that
 * transaction annotations should be added to classes, rather than business
 * interfaces, as they are an implementation detail rather than a contract
 * specification validation.
 *
 * @author Rod Johnson
 * @author Ramnivas Laddad
 * @since 2.0
 */
public abstract aspect AbstractTransactionAspect extends TransactionAspectSupport {
	
	/**
	 * Construct object using the given transaction metadata retrieval strategy.
	 * @param tas TransactionAttributeSource implementation, retrieving Spring
	 * transaction metadata for each joinpoint. Write the subclass to pass in null
	 * if it's intended to be configured by Setter Injection.
	 */
	protected AbstractTransactionAspect(TransactionAttributeSource tas) {
		setTransactionAttributeSource(tas);
	}
	
	@SuppressAjWarnings("adviceDidNotMatch")
	before(Object txObject) : transactionalMethodExecution(txObject) {
		MethodSignature methodSignature = (MethodSignature) thisJoinPoint.getSignature();
		Method method = methodSignature.getMethod();
		TransactionInfo txInfo = createTransactionIfNecessary(method, txObject.getClass());
	}
	
	@SuppressAjWarnings("adviceDidNotMatch")
	after(Object txObject) throwing(Throwable t) : transactionalMethodExecution(txObject) {
    try {
      completeTransactionAfterThrowing(TransactionAspectSupport.currentTransactionInfo(), t);
    }
    catch (Throwable t2) {
      logger.error("Failed to close transaction after throwing in a transactional method", t2);
    }
  }
	
	@SuppressAjWarnings("adviceDidNotMatch")
	after(Object txObject) returning() : transactionalMethodExecution(txObject) {
		commitTransactionAfterReturning(TransactionAspectSupport.currentTransactionInfo());
	}
	
	@SuppressAjWarnings("adviceDidNotMatch")
	after(Object txObject) : transactionalMethodExecution(txObject) {
		cleanupTransactionInfo(TransactionAspectSupport.currentTransactionInfo());
	}

	/**
	 * Concrete subaspects must implement this pointcut, to identify
	 * transactional methods. For each selected joinpoint, TransactionMetadata
	 * will be retrieved using Spring's TransactionAttributeSource interface.
	 */
	protected abstract pointcut transactionalMethodExecution(Object txObject);

}

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