org.springframework.orm.jpa.support.AsyncRequestInterceptor Maven / Gradle / Ivy
/*
* Copyright 2002-2018 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
*
* https://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.orm.jpa.support;
import java.util.concurrent.Callable;
import javax.persistence.EntityManagerFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.orm.jpa.EntityManagerFactoryUtils;
import org.springframework.orm.jpa.EntityManagerHolder;
import org.springframework.transaction.support.TransactionSynchronizationManager;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.context.request.async.CallableProcessingInterceptor;
import org.springframework.web.context.request.async.DeferredResult;
import org.springframework.web.context.request.async.DeferredResultProcessingInterceptor;
/**
* An interceptor with asynchronous web requests used in OpenSessionInViewFilter and
* OpenSessionInViewInterceptor.
*
* Ensures the following:
* 1) The session is bound/unbound when "callable processing" is started
* 2) The session is closed if an async request times out or an error occurred
*
* @author Rossen Stoyanchev
* @since 3.2.5
*/
class AsyncRequestInterceptor implements CallableProcessingInterceptor, DeferredResultProcessingInterceptor {
private static final Log logger = LogFactory.getLog(AsyncRequestInterceptor.class);
private final EntityManagerFactory emFactory;
private final EntityManagerHolder emHolder;
private volatile boolean timeoutInProgress;
private volatile boolean errorInProgress;
public AsyncRequestInterceptor(EntityManagerFactory emFactory, EntityManagerHolder emHolder) {
this.emFactory = emFactory;
this.emHolder = emHolder;
}
@Override
public void preProcess(NativeWebRequest request, Callable task) {
bindEntityManager();
}
public void bindEntityManager() {
this.timeoutInProgress = false;
this.errorInProgress = false;
TransactionSynchronizationManager.bindResource(this.emFactory, this.emHolder);
}
@Override
public void postProcess(NativeWebRequest request, Callable task, Object concurrentResult) {
TransactionSynchronizationManager.unbindResource(this.emFactory);
}
@Override
public Object handleTimeout(NativeWebRequest request, Callable task) {
this.timeoutInProgress = true;
return RESULT_NONE; // give other interceptors a chance to handle the timeout
}
@Override
public Object handleError(NativeWebRequest request, Callable task, Throwable t) {
this.errorInProgress = true;
return RESULT_NONE; // give other interceptors a chance to handle the error
}
@Override
public void afterCompletion(NativeWebRequest request, Callable task) throws Exception {
closeEntityManager();
}
private void closeEntityManager() {
if (this.timeoutInProgress || this.errorInProgress) {
logger.debug("Closing JPA EntityManager after async request timeout/error");
EntityManagerFactoryUtils.closeEntityManager(this.emHolder.getEntityManager());
}
}
// Implementation of DeferredResultProcessingInterceptor methods
@Override
public boolean handleTimeout(NativeWebRequest request, DeferredResult deferredResult) {
this.timeoutInProgress = true;
return true; // give other interceptors a chance to handle the timeout
}
@Override
public boolean handleError(NativeWebRequest request, DeferredResult deferredResult, Throwable t) {
this.errorInProgress = true;
return true; // give other interceptors a chance to handle the error
}
@Override
public void afterCompletion(NativeWebRequest request, DeferredResult deferredResult) {
closeEntityManager();
}
}