/**
 * 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.store.kahadb;

import java.io.File;
import java.io.RandomAccessFile;
import java.util.concurrent.atomic.AtomicLong;
import javax.jms.Connection;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.command.ActiveMQQueue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.junit.Ignore;
import org.junit.Test;

public class NoSpaceIOTest {

   private static final Logger LOG = LoggerFactory.getLogger(NoSpaceIOTest.class);

   // need an app to input to console in intellij idea
   public static void main(String[] args) throws Exception {
      new NoSpaceIOTest().testRunOutOfSpace();
   }

   // handy way to validate some out of space related errors with a usb key
   // allow it to run out of space, delete toDelete and see it recover
   @Ignore("needs small volume, like usb key")
   @Test
   public void testRunOutOfSpace() throws Exception {
      BrokerService broker = new BrokerService();
      File dataDir = new File("/Volumes/NO NAME/");
      File useUpSpace = new File(dataDir, "bigFile");
      if (!useUpSpace.exists()) {
         LOG.info("using up some space...");
         RandomAccessFile filler = new RandomAccessFile(useUpSpace, "rw");
         filler.setLength(1024 * 1024 * 1212); // use ~1.xG of 2G (usb) volume
         filler.close();
         File toDelete = new File(dataDir, "toDelete");
         filler = new RandomAccessFile(toDelete, "rw");
         filler.setLength(1024 * 1024 * 32 * 10); // 10 data files
         filler.close();
      }
      broker.setDataDirectoryFile(dataDir);
      broker.start();
      AtomicLong consumed = new AtomicLong(0);
      consume(consumed);
      LOG.info("consumed: " + consumed);

      broker.getPersistenceAdapter().checkpoint(true);

      AtomicLong sent = new AtomicLong(0);
      try {
         produce(sent, 200);
      }
      catch (Exception expected) {
         LOG.info("got ex, sent: " + sent);
      }
      LOG.info("sent: " + sent);
      System.out.println("Remove toDelete file and press any key to continue");
      int read = System.in.read();
      System.err.println("read:" + read);

      LOG.info("Trying to send again: " + sent);
      try {
         produce(sent, 200);
      }
      catch (Exception expected) {
         LOG.info("got ex, sent: " + sent);
      }
      LOG.info("sent: " + sent);
   }

   private void consume(AtomicLong consumed) throws JMSException {
      Connection c = new ActiveMQConnectionFactory("vm://localhost").createConnection();
      try {
         c.start();
         Session s = c.createSession(false, Session.AUTO_ACKNOWLEDGE);
         MessageConsumer consumer = s.createConsumer(new ActiveMQQueue("t"));
         while (consumer.receive(2000) != null) {
            consumed.incrementAndGet();
         }
      }
      finally {
         c.close();
      }
   }

   private void produce(AtomicLong sent, long toSend) throws JMSException {
      Connection c = new ActiveMQConnectionFactory("vm://localhost").createConnection();
      try {
         c.start();
         Session s = c.createSession(false, Session.AUTO_ACKNOWLEDGE);
         MessageProducer producer = s.createProducer(new ActiveMQQueue("t"));
         TextMessage m = s.createTextMessage();
         m.setText(String.valueOf(new char[1024 * 1024]));
         for (int i = 0; i < toSend; i++) {
            producer.send(m);
            sent.incrementAndGet();
         }
      }
      finally {
         c.close();
      }
   }
}
