/*
* Copyright 2016-2017 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.data.repository.core.support;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.springframework.transaction.support.TransactionSynchronizationManager;
/**
* {@link MethodInterceptor} detecting whether a transaction is already running and exposing that fact via
* {@link #isSurroundingTransactionActive()}. Useful in case subsequent interceptors might create transactions
* themselves but downstream components have to find out whether there was one running before the call entered the
* proxy.
*
* @author Oliver Gierke
* @author Christoph Strobl
* @since 1.13
* @soundtrack Hendrik Freischlader Trio - Openness (Openness)
*/
public enum SurroundingTransactionDetectorMethodInterceptor implements MethodInterceptor {
INSTANCE;
private final ThreadLocal<Boolean> SURROUNDING_TX_ACTIVE = new ThreadLocal<>();
/**
* Returns whether a transaction was active before the method call entered the repository proxy.
*
* @return
*/
public boolean isSurroundingTransactionActive() {
return Boolean.TRUE == SURROUNDING_TX_ACTIVE.get();
}
/*
* (non-Javadoc)
* @see org.aopalliance.intercept.MethodInterceptor#invoke(org.aopalliance.intercept.MethodInvocation)
*/
@Override
public Object invoke(MethodInvocation invocation) throws Throwable {
SURROUNDING_TX_ACTIVE.set(TransactionSynchronizationManager.isActualTransactionActive());
try {
return invocation.proceed();
} finally {
SURROUNDING_TX_ACTIVE.remove();
}
}
}