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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.
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  package org.apache.activemq.artemis.tests.integration.cluster.failover;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  
  import org.apache.activemq.artemis.api.core.SimpleString;
  import org.apache.activemq.artemis.api.core.client.ClientMessage;
  import org.apache.activemq.artemis.core.config.ScaleDownConfiguration;
  import org.apache.activemq.artemis.core.config.ha.SharedStorePrimaryPolicyConfiguration;
  import org.apache.activemq.artemis.core.config.ha.SharedStoreBackupPolicyConfiguration;
  import org.apache.activemq.artemis.core.postoffice.impl.LocalQueueBinding;
  import org.apache.activemq.artemis.core.server.cluster.impl.MessageLoadBalancingType;
  import org.apache.activemq.artemis.core.settings.impl.AddressSettings;
  import org.apache.activemq.artemis.tests.integration.cluster.distribution.ClusterTestBase;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  public class SharedStoreScaleDownBackupTest extends ClusterTestBase {
  
     protected boolean isNetty() {
        return true;
     }
  
     @Override
     @BeforeEach
     public void setUp() throws Exception {
        super.setUp();
  
        setupPrimaryServer(0, isFileStorage(), HAType.SharedStore, isNetty(), false);
        setupPrimaryServer(1, isFileStorage(), HAType.SharedStore, isNetty(), false);
        setupBackupServer(2, 0, isFileStorage(), HAType.SharedStore, isNetty());
  
        setupClusterConnection("cluster0", "testAddress", MessageLoadBalancingType.ON_DEMAND, 1, isNetty(), 0, 1);
        setupClusterConnection("cluster1", "testAddress", MessageLoadBalancingType.ON_DEMAND, 1, isNetty(), 1, 0);
        setupClusterConnection("cluster0", "testAddress", MessageLoadBalancingType.ON_DEMAND, 1, isNetty(), 2, 1);
  
        ((SharedStorePrimaryPolicyConfiguration)getServer(0).getConfiguration().getHAPolicyConfiguration()).
           setFailoverOnServerShutdown(true);
        ((SharedStoreBackupPolicyConfiguration)getServer(2).getConfiguration().getHAPolicyConfiguration()).
           setFailoverOnServerShutdown(true).
           setRestartBackup(true).
           setScaleDownConfiguration(new ScaleDownConfiguration().setEnabled(true).addConnector(
              getServer(2).getConfiguration().getClusterConfigurations().get(0).getStaticConnectors().get(0)));
  
        getServer(0).getConfiguration().getAddressSettings().put("#", new AddressSettings().setRedistributionDelay(0));
        getServer(1).getConfiguration().getAddressSettings().put("#", new AddressSettings().setRedistributionDelay(0));
  
        startServers(0, 1, 2);
  
        setupSessionFactory(0, isNetty());
        setupSessionFactory(1, isNetty());
     }
  
  
     @Test
     public void testBasicScaleDown() throws Exception {
        final int TEST_SIZE = 2;
        final String addressName = "testAddress";
        final String queueName1 = "testQueue1";
        final String queueName2 = "testQueue2";
  
        // create 2 queues on each node mapped to the same address
        createQueue(0, addressName, queueName1, null, true);
        createQueue(0, addressName, queueName2, null, true);
        createQueue(1, addressName, queueName1, null, true);
        createQueue(1, addressName, queueName2, null, true);
  
        // send messages to node 0
        send(0, addressName, TEST_SIZE, true, null);
  
        // consume a message from queue 2
        addConsumer(1, 0, queueName2, null, false);
        ClientMessage clientMessage = consumers[1].getConsumer().receive(250);
        assertNotNull(clientMessage);
        clientMessage.acknowledge();
        consumers[1].getSession().commit();
        //      removeConsumer(1);
  
        // at this point on node 0 there should be 2 messages in testQueue1 and 1 message in testQueue2
        assertEquals(TEST_SIZE, getMessageCount(((LocalQueueBinding) servers[0].getPostOffice().getBinding(SimpleString.of(queueName1))).getQueue()));
        assertEquals(TEST_SIZE - 1, getMessageCount(((LocalQueueBinding) servers[0].getPostOffice().getBinding(SimpleString.of(queueName2))).getQueue()));
  
        // trigger scaleDown from node 0 to node 1
        servers[0].stop();
  
        // get the 2 messages from queue 1
        addConsumer(0, 1, queueName1, null);
        clientMessage = consumers[0].getConsumer().receive(250);
        assertNotNull(clientMessage);
        clientMessage.acknowledge();
        clientMessage = consumers[0].getConsumer().receive(250);
        assertNotNull(clientMessage);
        clientMessage.acknowledge();
  
        // ensure there are no more messages on queue 1
        clientMessage = consumers[0].getConsumer().receive(250);
        assertNull(clientMessage);
        removeConsumer(0);
  
        // get the 1 message from queue 2
        addConsumer(0, 1, queueName2, null);
        clientMessage = consumers[0].getConsumer().receive(250);
        assertNotNull(clientMessage);
        clientMessage.acknowledge();
  
        // ensure there are no more messages on queue 1
        clientMessage = consumers[0].getConsumer().receive(250);
        assertNull(clientMessage);
        removeConsumer(0);
     }
  }
  