/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.jooby.internal.hbm;
import java.sql.Connection;
import java.util.function.Consumer;
import javax.persistence.EntityManager;
import javax.persistence.EntityTransaction;
import org.hibernate.FlushMode;
import org.hibernate.Session;
import org.hibernate.engine.spi.SessionImplementor;
import org.jooby.Response;
import org.jooby.Result;
import org.jooby.hbm.OpenSessionInView;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class TrxResponse extends Response.Forwarding {
/** The logging system. */
private final Logger log = LoggerFactory.getLogger(OpenSessionInView.class);
private Session session;
private EntityManager em;
private String sessionId;
private EntityTransaction trx;
private boolean rollbackOnly;
public TrxResponse(final Response response, final EntityManager em) {
super(response);
this.em = em;
this.session = (Session) em.getDelegate();
this.sessionId = Integer.toHexString(System.identityHashCode(session));
}
public TrxResponse begin() {
this.trx = em.getTransaction();
log.debug(" [{}] starting transation: {}", sessionId, trx);
trx.begin();
return this;
}
public void setRollbackOnly() {
rollbackOnly = true;
}
private void trxSend(final Object result) throws Throwable {
Consumer<Boolean> setReadOnly = (readOnly) -> {
try {
Connection connection = ((SessionImplementor) session).connection();
connection.setReadOnly(readOnly);
} catch (Exception ex) {
log.trace(" [" + sessionId + "] unable to setReadOnly " + readOnly, ex);
}
session.setDefaultReadOnly(readOnly);
};
try {
log.debug(" [{}] flushing", sessionId);
session.flush();
if (trx.isActive()) {
log.debug(" [{}] commiting transaction: {}", sessionId, trx);
trx.commit();
}
EntityTransaction readOnlyTrx = null;
try {
// start new transaction
log.debug(" [{}] setting connection to read only", sessionId);
setReadOnly.accept(true);
session.setFlushMode(FlushMode.MANUAL);
readOnlyTrx = em.getTransaction();
log.debug(" [{}] starting readonly transaction: {}", sessionId, readOnlyTrx);
readOnlyTrx.begin();
// send it!
rsp.send(result);
log.debug(" [{}] commiting readonly transaction: {}", sessionId, readOnlyTrx);
readOnlyTrx.commit();
} catch (Throwable ex) {
if (readOnlyTrx != null && readOnlyTrx.isActive()) {
log.debug(" [{}] rolling back readonly transaction: {}", sessionId, readOnlyTrx);
readOnlyTrx.rollback();
}
throw ex;
} finally {
log.debug(" [{}] removing readonly mode from connection", sessionId);
setReadOnly.accept(false);
}
} catch (Throwable ex) {
rollbackOnly = true;
throw ex;
} finally {
done();
}
}
public void done() {
EntityManager em = this.em;
if (em == null) {
return;
}
EntityTransaction trx = this.trx;
this.em = null;
this.session = null;
this.trx = null;
try {
if (trx.isActive()) {
if (rollbackOnly) {
log.debug(" [{}] rolling back transation: {}", sessionId, trx);
trx.rollback();
} else {
log.debug(" [{}] commiting transaction: {}", sessionId, trx);
trx.commit();
}
}
} catch (Exception ex) {
log.error(" [" + sessionId + "] unable trying to commit/rollback trx resulted in error", ex);
} finally {
log.debug(" [{}] closing", sessionId);
em.close();
}
}
@Override
public void send(final Object result) throws Throwable {
trxSend(result);
}
@Override
public void send(final Result result) throws Throwable {
trxSend(result);
}
}