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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.mqtt;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.util.concurrent.TimeUnit;
  
  import org.apache.activemq.artemis.core.config.WildcardConfiguration;
  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.fusesource.mqtt.client.BlockingConnection;
  import org.fusesource.mqtt.client.MQTT;
  import org.fusesource.mqtt.client.Message;
  import org.fusesource.mqtt.client.QoS;
  import org.fusesource.mqtt.client.Topic;
  import org.junit.jupiter.api.Test;
  
  public class MqttClusterWildcardTest extends ClusterTestBase {
  
     @Override
     protected boolean isResolveProtocols() {
        return true;
     }
  
     public boolean isNetty() {
        return true;
     }
  
     @Test
     public void loadBalanceRequests() throws Exception {
        final String TOPIC = "test/+/some/#";
  
        WildcardConfiguration wildcardConfiguration = new WildcardConfiguration();
        wildcardConfiguration.setAnyWords('#');
        wildcardConfiguration.setDelimiter('/');
        wildcardConfiguration.setRoutingEnabled(true);
        wildcardConfiguration.setSingleWord('+');
  
        setupServer(0, false, isNetty());
        servers[0].getConfiguration().setWildCardConfiguration(wildcardConfiguration);
        setupServer(1, false, isNetty());
        servers[1].getConfiguration().setWildCardConfiguration(wildcardConfiguration);
  
        setupClusterConnection("cluster0", "", MessageLoadBalancingType.ON_DEMAND, 1, isNetty(), 0, 1);
        setupClusterConnection("cluster1", "", MessageLoadBalancingType.ON_DEMAND, 1, isNetty(), 1, 0);
  
        startServers(0, 1);
  
        BlockingConnection connection1 = null;
        BlockingConnection connection2 = null;
        try {
           connection1 = retrieveMQTTConnection("tcp://localhost:61616");
           connection2 = retrieveMQTTConnection("tcp://localhost:61617");
  
           // Subscribe to topics
           Topic[] topics = {new Topic(TOPIC, QoS.AT_MOST_ONCE)};
           connection1.subscribe(topics);
           connection2.subscribe(topics);
  
           waitForBindings(0, TOPIC, 1, 1, true);
           waitForBindings(1, TOPIC, 1, 1, true);
  
           waitForBindings(0, TOPIC, 1, 1, false);
           waitForBindings(1, TOPIC, 1, 1, false);
  
           // Publish Messages
           String payload1 = "This is message 1";
           String payload2 = "This is message 2";
           String payload3 = "This is message 3";
  
           connection1.publish("test/1/some/la", payload1.getBytes(), QoS.AT_LEAST_ONCE, false);
           connection1.publish("test/1/some/la", payload2.getBytes(), QoS.AT_MOST_ONCE, false);
           connection1.publish("test/1/some/la", payload3.getBytes(), QoS.AT_MOST_ONCE, false);
  
           Message message1 = connection1.receive(5, TimeUnit.SECONDS);
           Message message2 = connection1.receive(5, TimeUnit.SECONDS);
           Message message3 = connection1.receive(5, TimeUnit.SECONDS);
           Message message4 = connection2.receive(5, TimeUnit.SECONDS);
           Message message5 = connection2.receive(5, TimeUnit.SECONDS);
           Message message6 = connection2.receive(5, TimeUnit.SECONDS);
  
           assertEquals(payload1, new String(message1.getPayload()));
           assertEquals(payload2, new String(message2.getPayload()));
           assertEquals(payload3, new String(message3.getPayload()));
           assertEquals(payload1, new String(message4.getPayload()));
           assertEquals(payload2, new String(message5.getPayload()));
           assertEquals(payload3, new String(message6.getPayload()));
  
           assertNonWildcardTopic(message1);
           assertNonWildcardTopic(message2);
           assertNonWildcardTopic(message3);
           assertNonWildcardTopic(message4);
           assertNonWildcardTopic(message5);
           assertNonWildcardTopic(message6);
  
  
        } finally {
           String[] topics = new String[]{TOPIC};
           if (connection1 != null) {
              connection1.unsubscribe(topics);
              connection1.disconnect();
           }
           if (connection2 != null) {
              connection2.unsubscribe(topics);
              connection2.disconnect();
           }
        }
     }
  
     @Test
     public void verifyRedistribution() throws Exception {
        final String TOPIC = "test/+/some/#";
        final String clientId = "SubOne";
  
        WildcardConfiguration wildcardConfiguration = new WildcardConfiguration();
        wildcardConfiguration.setAnyWords('#');
        wildcardConfiguration.setDelimiter('/');
        wildcardConfiguration.setRoutingEnabled(true);
        wildcardConfiguration.setSingleWord('+');
  
        setupServer(0, false, isNetty());
        servers[0].getConfiguration().setWildCardConfiguration(wildcardConfiguration);
  
        setupServer(1, false, isNetty());
        servers[1].getConfiguration().setWildCardConfiguration(wildcardConfiguration);
  
        // allow redistribution
        AddressSettings addressSettings = new AddressSettings();
        addressSettings.setRedistributionDelay(0);
        servers[0].getConfiguration().addAddressSetting("#", addressSettings);
        servers[1].getConfiguration().addAddressSetting("#", addressSettings);
  
        setupClusterConnection("cluster0", "", MessageLoadBalancingType.ON_DEMAND, 1, isNetty(), 0, 1);
        setupClusterConnection("cluster1", "", MessageLoadBalancingType.ON_DEMAND, 1, isNetty(), 1, 0);
  
        startServers(0, 1);
  
        BlockingConnection connection1 = null;
        BlockingConnection connection2 = null;
        try {
           connection1 = retrieveMQTTConnection("tcp://localhost:61616");
           connection2 = retrieveMQTTConnection("tcp://localhost:61617", clientId);
  
           // Subscribe to topics
           Topic[] topics = {new Topic(TOPIC, QoS.EXACTLY_ONCE)};
           connection2.subscribe(topics);
  
           waitForBindings(0, TOPIC, 0, 0, true);
           waitForBindings(1, TOPIC, 1, 1, true);
  
           waitForBindings(0, TOPIC, 1, 1, false);
           waitForBindings(1, TOPIC, 0, 0, false);
  
           // Publish Messages
           String payload1 = "This is message 1";
           String payload2 = "This is message 2";
           String payload3 = "This is message 3";
  
           connection1.publish("test/1/some/la", payload1.getBytes(), QoS.EXACTLY_ONCE, false);
           connection1.publish("test/1/some/la", payload2.getBytes(), QoS.EXACTLY_ONCE, false);
           connection1.publish("test/1/some/la", payload3.getBytes(), QoS.EXACTLY_ONCE, false);
  
  
           waitForMessages(1, TOPIC, 3);
  
           connection2.disconnect();
  
           // force redistribution
           connection2 = retrieveMQTTConnection("tcp://localhost:61616", clientId);
           connection2.subscribe(topics);
  
           Message message4 = connection2.receive(15, TimeUnit.SECONDS);
           Message message5 = connection2.receive(5, TimeUnit.SECONDS);
           Message message6 = connection2.receive(5, TimeUnit.SECONDS);
  
           assertEquals(payload1, new String(message4.getPayload()));
           assertEquals(payload2, new String(message5.getPayload()));
           assertEquals(payload3, new String(message6.getPayload()));
  
           assertNonWildcardTopic(message4);
           assertNonWildcardTopic(message5);
           assertNonWildcardTopic(message6);
  
        } finally {
           String[] topics = new String[]{TOPIC};
           if (connection1 != null) {
              connection1.unsubscribe(topics);
              connection1.disconnect();
           }
           if (connection2 != null) {
              connection2.unsubscribe(topics);
              connection2.disconnect();
           }
        }
     }
  
     @Test
     public void wildcardsWithBroker1Disconnected() throws Exception {
        BlockingConnection connection1 = null;
        BlockingConnection connection2 = null;
        final String TOPIC = "test/+/some/#";
        try {
  
           WildcardConfiguration wildcardConfiguration = new WildcardConfiguration();
           wildcardConfiguration.setAnyWords('#');
           wildcardConfiguration.setDelimiter('/');
           wildcardConfiguration.setRoutingEnabled(true);
           wildcardConfiguration.setSingleWord('+');
  
           setupServer(0, false, isNetty());
           servers[0].getConfiguration().setWildCardConfiguration(wildcardConfiguration);
  
           setupClusterConnection("cluster0", "", MessageLoadBalancingType.ON_DEMAND, 1, isNetty(), 0, 1);
  
           startServers(0);
  
           connection1 = retrieveMQTTConnection("tcp://localhost:61616");
  
           // Subscribe to topics
           Topic[] topics = {new Topic(TOPIC, QoS.AT_MOST_ONCE)};
           connection1.subscribe(topics);
  
           waitForBindings(0, TOPIC, 1, 1, true);
           waitForBindings(0, TOPIC, 0, 0, false);
  
           // Publish Messages
           String payload1 = "This is message 1";
           String payload2 = "This is message 2";
           String payload3 = "This is message 3";
  
           connection1.publish("test/1/some/la", payload1.getBytes(), QoS.AT_LEAST_ONCE, false);
           connection1.publish("test/1/some/la", payload2.getBytes(), QoS.AT_MOST_ONCE, false);
           connection1.publish("test/1/some/la", payload3.getBytes(), QoS.AT_MOST_ONCE, false);
  
           Message message1 = connection1.receive(5, TimeUnit.SECONDS);
  
           setupServer(1, false, isNetty());
           servers[1].getConfiguration().setWildCardConfiguration(wildcardConfiguration);
  
           setupClusterConnection("cluster1", "", MessageLoadBalancingType.ON_DEMAND, 1, isNetty(), 1, 0);
           startServers(1);
  
           connection2 = retrieveMQTTConnection("tcp://localhost:61617");
           connection2.subscribe(topics);
  
           waitForBindings(1, TOPIC, 1, 1, false);
           waitForBindings(1, TOPIC, 1, 1, true);
           waitForBindings(0, TOPIC, 1, 1, false);
           waitForBindings(0, TOPIC, 1, 1, true);
  
           connection1.publish("test/1/some/la", payload1.getBytes(), QoS.AT_LEAST_ONCE, false);
           connection1.publish("test/1/some/la", payload2.getBytes(), QoS.AT_MOST_ONCE, false);
           connection1.publish("test/1/some/la", payload3.getBytes(), QoS.AT_MOST_ONCE, false);
  
           Message message2 = connection1.receive(10, TimeUnit.SECONDS);
           assertNotNull(message2);
           Message message3 = connection1.receive(10, TimeUnit.SECONDS);
           assertNotNull(message3);
           Message message4 = connection2.receive(10, TimeUnit.SECONDS);
           assertNotNull(message4);
           Message message5 = connection2.receive(10, TimeUnit.SECONDS);
           assertNotNull(message5);
           Message message6 = connection2.receive(10, TimeUnit.SECONDS);
           assertNotNull(message6);
  
           assertEquals(payload1, new String(message1.getPayload()));
           assertEquals(payload2, new String(message2.getPayload()));
           assertEquals(payload3, new String(message3.getPayload()));
           assertEquals(payload1, new String(message4.getPayload()));
           assertEquals(payload2, new String(message5.getPayload()));
           assertEquals(payload3, new String(message6.getPayload()));
  
           assertNonWildcardTopic(message1);
           assertNonWildcardTopic(message2);
           assertNonWildcardTopic(message3);
           assertNonWildcardTopic(message4);
           assertNonWildcardTopic(message5);
           assertNonWildcardTopic(message6);
  
  
        } finally {
           String[] topics = new String[]{TOPIC};
           if (connection1 != null) {
              connection1.unsubscribe(topics);
              connection1.disconnect();
           }
           if (connection2 != null) {
              connection2.unsubscribe(topics);
              connection2.disconnect();
           }
        }
     }
  
     private void assertNonWildcardTopic(Message message1) {
        assertNotNull(message1);
        String payload = new String(message1.getPayload());
        System.err.println("got payload: " + payload);
  
        assertTrue(payload.contains("message"));
        String topic = message1.getTopic();
        System.err.println("got topic: " + topic);
        assertFalse(topic.contains("+"));
        assertFalse(topic.contains("*"));
        assertFalse(topic.contains("#"));
     }
  
  
     private static BlockingConnection retrieveMQTTConnection(String host) throws Exception {
        return retrieveMQTTConnection(host, null);
     }
  
     private static BlockingConnection retrieveMQTTConnection(String host, String clientId) throws Exception {
        MQTT mqtt = new MQTT();
        mqtt.setHost(host);
        if (clientId != null) {
           mqtt.setClientId(clientId);
           mqtt.setCleanSession(false);
        }
        BlockingConnection connection = mqtt.blockingConnection();
        connection.connect();
        return connection;
     }
  }
  