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   * 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.artemis.tests.integration.server;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertInstanceOf;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.junit.jupiter.api.Assertions.fail;
  
  import org.apache.activemq.artemis.api.core.ActiveMQExceptionType;
  import org.apache.activemq.artemis.api.core.ActiveMQSessionCreationException;
  import org.apache.activemq.artemis.api.core.QueueConfiguration;
  import org.apache.activemq.artemis.api.core.client.ClientProducer;
  import org.apache.activemq.artemis.api.core.client.ClientSession;
  import org.apache.activemq.artemis.api.core.client.ClientSessionFactory;
  import org.apache.activemq.artemis.api.core.client.ServerLocator;
  import org.apache.activemq.artemis.core.config.Configuration;
  import org.apache.activemq.artemis.core.server.ActiveMQServer;
  import org.apache.activemq.artemis.core.server.ActiveMQServers;
  import org.apache.activemq.artemis.api.core.RoutingType;
  import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
  import org.junit.jupiter.api.Test;
  
  public class GracefulShutdownTest extends ActiveMQTestBase {
  
     @Test
     public void testGracefulShutdown() throws Exception {
        Configuration config = createDefaultInVMConfig().setGracefulShutdownEnabled(true);
  
        final ActiveMQServer server = addServer(ActiveMQServers.newActiveMQServer(config, false));
  
        server.start();
  
        ServerLocator locator = createInVMNonHALocator();
  
        ClientSessionFactory sf = createSessionFactory(locator);
  
        ClientSession session = sf.createSession(true, true);
  
        Thread t = new Thread(() -> {
           try {
              server.stop();
           } catch (Exception e) {
              e.printStackTrace();
           }
        });
  
        t.setName("shutdown thread");
        t.start();
  
        // wait for the thread to actually call stop() on the server
        while (server.isStarted()) {
           Thread.sleep(100);
        }
  
        // confirm we can still do work on the original connection even though the server is stopping
        session.createQueue(QueueConfiguration.of("testQueue").setAddress("testAddress").setRoutingType(RoutingType.ANYCAST));
        ClientProducer producer = session.createProducer("testAddress");
        producer.send(session.createMessage(true));
        session.start();
        assertNotNull(session.createConsumer("testQueue").receive(500));
  
        try {
           sf.createSession();
           fail("Creating a session here should fail because the acceptors should be paused");
        } catch (Exception e) {
           assertInstanceOf(ActiveMQSessionCreationException.class, e);
           ActiveMQSessionCreationException activeMQSessionCreationException = (ActiveMQSessionCreationException) e;
           assertEquals(ActiveMQExceptionType.SESSION_CREATION_REJECTED, activeMQSessionCreationException.getType());
        }
  
        // close the connection to allow broker shutdown to complete
        locator.close();
  
        long start = System.currentTimeMillis();
  
        // wait for the shutdown thread to complete, interrupt it if it takes too long
        while (t.isAlive()) {
           if (System.currentTimeMillis() - start > 3000) {
              t.interrupt();
              break;
           }
           Thread.sleep(100);
        }
  
        // make sure the shutdown thread is dead
        assertFalse(t.isAlive());
     }
  
     @Test
     public void testGracefulShutdownWithTimeout() throws Exception {
        long timeout = 10000;
  
        Configuration config = createDefaultInVMConfig().setGracefulShutdownEnabled(true).setGracefulShutdownTimeout(timeout);
  
        final ActiveMQServer server = addServer(ActiveMQServers.newActiveMQServer(config, false));
  
        server.start();
  
        ServerLocator locator = createInVMNonHALocator();
  
        ClientSessionFactory sf = createSessionFactory(locator);
  
        Thread t = new Thread(() -> {
           try {
              server.stop();
           } catch (Exception e) {
              e.printStackTrace();
           }
        });
  
        t.setName("shutdown thread");
        long start = System.currentTimeMillis();
        t.start();
  
        // wait for the thread to actually call stop() on the server
        while (server.isStarted()) {
           Thread.sleep(100);
        }
  
        try {
           sf.createSession();
           fail("Creating a session here should fail because the acceptors should be paused");
        } catch (Exception e) {
           assertInstanceOf(ActiveMQSessionCreationException.class, e);
           ActiveMQSessionCreationException activeMQSessionCreationException = (ActiveMQSessionCreationException) e;
           assertEquals(ActiveMQExceptionType.SESSION_CREATION_REJECTED, activeMQSessionCreationException.getType());
        }
  
        Thread.sleep(timeout / 2);
  
        assertTrue(t.isAlive(), "thread should still be alive here waiting for the timeout to elapse");
  
        while (t.isAlive()) {
           Thread.sleep(100);
        }
  
        assertTrue(System.currentTimeMillis() - start >= timeout, "thread terminated too soon, the graceful shutdown timeout wasn't enforced properly");
     }
  }
  