/**
 * 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.bugs;

import java.util.concurrent.CountDownLatch;

import javax.jms.Connection;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.ObjectMessage;
import javax.jms.Session;

import junit.framework.TestCase;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.kaha.impl.async.AsyncDataManager;
import org.apache.activemq.store.amq.AMQPersistenceAdapter;
import org.apache.activemq.store.amq.AMQPersistenceAdapterFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/*
 * see https://issues.apache.org/activemq/browse/AMQ-1926
 */
public class DataFileNotDeletedTest extends TestCase {

    private static final Log LOG = LogFactory.getLog(DataFileNotDeletedTest.class);

    private final CountDownLatch latch = new CountDownLatch(max_messages);
    private static int max_messages = 600;
    private static int messageCounter;
    private String destinationName = getName()+"_Queue";
    private BrokerService broker;
    private Connection receiverConnection;
    private Connection producerConnection;
    final boolean useTopic = false;
    
    AMQPersistenceAdapter persistentAdapter;
    protected static final String payload = new String(new byte[512]);

    public void setUp() throws Exception {
        messageCounter = 0;
        startBroker();
        receiverConnection = createConnection();
        receiverConnection.start();
        producerConnection = createConnection();
        producerConnection.start();
    }
    
    public void tearDown() throws Exception {
        receiverConnection.close();
        producerConnection.close();
        broker.stop();
    }

    public void testForDataFileNotDeleted() throws Exception {
        doTestForDataFileNotDeleted(false);
    }
    
    public void testForDataFileNotDeletedTransacted() throws Exception {
        doTestForDataFileNotDeleted(true);
    }
    
    private void doTestForDataFileNotDeleted(boolean transacted) throws Exception {
        
        Receiver receiver = new Receiver() {
            public void receive(String s) throws Exception {
                messageCounter++; 
                latch.countDown();
            }
        };
        buildReceiver(receiverConnection, destinationName, transacted, receiver, useTopic);

        final MessageSender producer = new MessageSender(destinationName, producerConnection, transacted, useTopic);
        for (int i=0; i< max_messages; i++) {
            producer.send(payload );
        }
        latch.await();
        assertEquals(max_messages, messageCounter);
        LOG.info("Sent and received + " + messageCounter + ", file count " + persistentAdapter.getAsyncDataManager().getFiles().size());
        waitFordataFilesToBeCleanedUp(persistentAdapter.getAsyncDataManager(), 60000, 2); 
    }

    private void waitFordataFilesToBeCleanedUp(
            AsyncDataManager asyncDataManager, int timeout, int numExpected) throws InterruptedException {
        long expiry = System.currentTimeMillis()  + timeout;
        while(expiry > System.currentTimeMillis()) {
            if (asyncDataManager.getFiles().size() > numExpected) {
                Thread.sleep(1000);
            } else {
                break;
            }
        }
        assertEquals("persistence adapter dataManager has correct number of files", numExpected, asyncDataManager.getFiles().size());
    }

    private Connection createConnection() throws JMSException {
        ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("tcp://localhost:61616");
        return factory.createConnection();
    }

    private void startBroker() throws Exception {
        broker = new BrokerService();
        broker.setDeleteAllMessagesOnStartup(true);
        broker.setPersistent(true);
        broker.setUseJmx(true);
        broker.addConnector("tcp://localhost:61616").setName("Default");
           
        AMQPersistenceAdapterFactory factory = (AMQPersistenceAdapterFactory) broker.getPersistenceFactory();
        // ensure there are a bunch of data files but multiple entries in each
        factory.setMaxFileLength(1024 * 20);
        // speed up the test case, checkpoint an cleanup early and often
        factory.setCheckpointInterval(500);
        factory.setCleanupInterval(500);
        factory.setSyncOnWrite(false);
        
        persistentAdapter = (AMQPersistenceAdapter) broker.getPersistenceAdapter();
        broker.start();
        LOG.info("Starting broker..");
    }

    private void buildReceiver(Connection connection, final String queueName, boolean transacted, final Receiver receiver, boolean isTopic) throws Exception {
        final Session session = transacted ? connection.createSession(true, Session.SESSION_TRANSACTED) : connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        MessageConsumer inputMessageConsumer = session.createConsumer(isTopic ? session.createTopic(queueName) : session.createQueue(queueName));
        MessageListener messageListener = new MessageListener() {

            public void onMessage(Message message) {
                try {
                    ObjectMessage objectMessage = (ObjectMessage)message;
                    String s = (String)objectMessage.getObject();
                    receiver.receive(s);
                    if (session.getTransacted()) {
                        session.commit();
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        };
        inputMessageConsumer.setMessageListener(messageListener);
    }
}
