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.integration.mqtt5.spec;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.activemq.artemis.tests.integration.mqtt5.MQTT5TestSupport;
  import org.apache.activemq.artemis.utils.RandomUtil;
  import org.apache.activemq.artemis.tests.util.Wait;
  import org.eclipse.paho.mqttv5.client.MqttClient;
  import org.eclipse.paho.mqttv5.common.MqttMessage;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.Timeout;
  
  /*
   * Fulfilled by client or Netty codec (i.e. not tested here):
   *
   * [MQTT-4.5.0-2] The Client MUST acknowledge any Publish packet it receives according to the applicable QoS rules regardless of whether it elects to process the Application Message that it contains.
   */
  
  public class MessageReceiptTests extends MQTT5TestSupport {
  
     /**
      * [MQTT-4.5.0-1] When a Server takes ownership of an incoming Application Message it MUST add it to the Session
      * State for those Clients that have matching Subscriptions.
      *
      * The spec here is speaking in terms of an implementation detail. To be clear, messages are not added "to the
      * Session State" specifically. They are added to the queue(s) associated with the matching client subscriptions.
      *
      * This test is pretty generic. It just creates a bunch of individual consumers and sends a message to each one.
      */
     @Test
     @Timeout(DEFAULT_TIMEOUT_SEC)
     public void testMessageReceipt() throws Exception {
        final String TOPIC = RandomUtil.randomUUIDString();
        final String CONSUMER_ID = "consumer";
        final int CONSUMER_COUNT = 25;
        final MqttClient[] consumers = new MqttClient[CONSUMER_COUNT];
  
        final CountDownLatch latch = new CountDownLatch(CONSUMER_COUNT);
        for (int i = 0; i < CONSUMER_COUNT; i++) {
           MqttClient consumer = createPahoClient(CONSUMER_ID + i);
           consumers[i] = consumer;
           consumer.connect();
           int finalI = i;
           consumer.setCallback(new DefaultMqttCallback() {
              @Override
              public void messageArrived(String incomingTopic, MqttMessage message) throws Exception {
                 System.out.println("=== Message: " + message + " from: " + incomingTopic);
                 assertEquals(TOPIC + finalI, incomingTopic);
                 assertEquals("hello" + finalI, new String(message.getPayload()));
                 latch.countDown();
              }
           });
           consumer.subscribe(TOPIC + i, 0);
        }
  
        MqttClient producer = createPahoClient("producer");
        producer.connect();
        for (int i = 0; i < CONSUMER_COUNT; i++) {
           producer.publish(TOPIC + i, ("hello" + i).getBytes(), 0, false);
        }
        Wait.assertEquals((long) CONSUMER_COUNT, () -> {
           int totalMessagesAdded = 0;
           for (int i = 0; i < CONSUMER_COUNT; i++) {
              totalMessagesAdded += getSubscriptionQueue(TOPIC + i, CONSUMER_ID + i).getMessagesAdded();
           }
           return totalMessagesAdded;
        }, 2000, 100);
        producer.disconnect();
        producer.close();
  
        assertTrue(latch.await(30, TimeUnit.SECONDS));
        for (int i = 0; i < CONSUMER_COUNT; i++) {
           consumers[i].disconnect();
           consumers[i].close();
        }
     }
  }
  