content: /*
   * 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.leak;
  
  import io.github.checkleak.core.CheckLeak;
  import org.apache.activemq.artemis.core.postoffice.impl.PostOfficeImpl;
  import org.apache.activemq.artemis.core.server.ActiveMQServer;
  import org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl;
  import org.apache.activemq.artemis.core.server.impl.ServerStatus;
  import org.apache.activemq.artemis.protocol.amqp.connect.mirror.AckManager;
  import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertSame;
  
  
  /** Making sure the server will not leak after started / stopped */
  public class StartStopLeakTest extends ActiveMQTestBase {
  
     @Test
     public void testAckManagerLeak() throws Throwable {
        CheckLeak checkLeak = new CheckLeak();
        internalTest(checkLeak);
  
        clearServers();
  
        MemoryAssertions.assertMemory(checkLeak, 0, ActiveMQServerImpl.class.getName());
     }
  
     // Creating a sub method to facilitate clearing references towards ActiveMQServerImpl
     private void internalTest(CheckLeak checkLeak) throws Exception {
        assertNull(ServerStatus.getServer(), () -> "A previous test left a server hanging on ServerStatus -> " + ServerStatus.getServer());
  
        for (int i = 0; i < 5; i++) {
           clearServers();
           ActiveMQServer server = createServer(false, true);
           server.start();
           MemoryAssertions.assertMemory(checkLeak, 1, AckManager.class.getName());
  
           assertSame(server, ServerStatus.getServer());
  
           server.stop(false);
           assertEquals(0, server.getExternalComponents().size());
  
           assertNull(ServerStatus.getServer());
           MemoryAssertions.assertMemory(checkLeak, 1, PostOfficeImpl.class.getName());
        }
  
        MemoryAssertions.basicMemoryAsserts();
  
        clearServers();
  
        MemoryAssertions.assertMemory(checkLeak, 0, PostOfficeImpl.class.getName());
        MemoryAssertions.assertMemory(checkLeak, 0, AckManager.class.getName());
     }
  }