/**
 * 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.apache.activemq;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

import java.util.concurrent.atomic.AtomicInteger;

import javax.jms.TransactionRolledBackException;

import org.apache.activemq.transaction.Synchronization;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class TransactionContextTest {

   TransactionContext underTest;
   ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("vm://localhost");
   ActiveMQConnection connection;

   @Before
   public void setup() throws Exception {
      connection = factory.createActiveMQConnection();
      underTest = new TransactionContext(connection);
   }

   @After
   public void tearDown() throws Exception {
      connection.close();
   }

   @Test
   public void testSyncBeforeEndCalledOnceOnRollback() throws Exception {
      final AtomicInteger beforeEndCountA = new AtomicInteger(0);
      final AtomicInteger beforeEndCountB = new AtomicInteger(0);
      final AtomicInteger rollbackCountA = new AtomicInteger(0);
      final AtomicInteger rollbackCountB = new AtomicInteger(0);
      underTest.addSynchronization(new Synchronization() {
         @Override
         public void beforeEnd() throws Exception {
            if (beforeEndCountA.getAndIncrement() == 0) {
               throw new TransactionRolledBackException("force rollback");
            }
         }

         @Override
         public void afterCommit() throws Exception {
            fail("exepcted rollback exception");
         }

         @Override
         public void afterRollback() throws Exception {
            rollbackCountA.incrementAndGet();
         }

      });

      underTest.addSynchronization(new Synchronization() {
         @Override
         public void beforeEnd() throws Exception {
            beforeEndCountB.getAndIncrement();
         }

         @Override
         public void afterCommit() throws Exception {
            fail("exepcted rollback exception");
         }

         @Override
         public void afterRollback() throws Exception {
            rollbackCountB.incrementAndGet();
         }

      });

      try {
         underTest.commit();
         fail("exepcted rollback exception");
      }
      catch (TransactionRolledBackException expected) {
      }

      assertEquals("beforeEnd A called once", 1, beforeEndCountA.get());
      assertEquals("beforeEnd B called once", 1, beforeEndCountA.get());
      assertEquals("rollbackCount B 0", 1, rollbackCountB.get());
      assertEquals("rollbackCount A B", rollbackCountA.get(), rollbackCountB.get());
   }

   @Test
   public void testSyncIndexCleared() throws Exception {
      final AtomicInteger beforeEndCountA = new AtomicInteger(0);
      final AtomicInteger rollbackCountA = new AtomicInteger(0);
      Synchronization sync = new Synchronization() {
         @Override
         public void beforeEnd() throws Exception {
            beforeEndCountA.getAndIncrement();
         }

         @Override
         public void afterCommit() throws Exception {
            fail("exepcted rollback exception");
         }

         @Override
         public void afterRollback() throws Exception {
            rollbackCountA.incrementAndGet();
         }
      };

      underTest.begin();
      underTest.addSynchronization(sync);
      underTest.rollback();

      assertEquals("beforeEnd", 1, beforeEndCountA.get());
      assertEquals("rollback", 1, rollbackCountA.get());

      // do it again
      underTest.begin();
      underTest.addSynchronization(sync);
      underTest.rollback();

      assertEquals("beforeEnd", 2, beforeEndCountA.get());
      assertEquals("rollback", 2, rollbackCountA.get());
   }
}
