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.discovery;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.net.InetAddress;
  import java.util.concurrent.ScheduledExecutorService;
  import java.util.concurrent.ScheduledThreadPoolExecutor;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import org.apache.activemq.artemis.api.core.ActiveMQBuffer;
  import org.apache.activemq.artemis.api.core.ActiveMQBuffers;
  import org.apache.activemq.artemis.api.core.BroadcastEndpoint;
  import org.apache.activemq.artemis.api.core.BroadcastEndpointFactory;
  import org.apache.activemq.artemis.api.core.UDPBroadcastEndpointFactory;
  import org.apache.activemq.artemis.core.cluster.DiscoveryGroup;
  import org.apache.activemq.artemis.core.server.cluster.impl.BroadcastGroupImpl;
  import org.apache.activemq.artemis.utils.ActiveMQThreadFactory;
  import org.apache.activemq.artemis.utils.RandomUtil;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  /**
   * This is to make sure discovery works fine even when garbled data is sent
   */
  public class DiscoveryStayAliveTest extends DiscoveryBaseTest {
  
     ScheduledExecutorService scheduledExecutorService;
  
     @Override
     @BeforeEach
     public void setUp() throws Exception {
        super.setUp();
        scheduledExecutorService = new ScheduledThreadPoolExecutor(1, new ActiveMQThreadFactory("ActiveMQ-scheduled-threads", false, Thread.currentThread().getContextClassLoader()));
  
     }
  
     @AfterEach
     @Override
     public void tearDown() throws Exception {
        scheduledExecutorService.shutdown();
        super.tearDown();
     }
  
     @Test
     public void testDiscoveryRunning() throws Throwable {
        final InetAddress groupAddress = InetAddress.getByName(address1);
        final int groupPort = getUDPDiscoveryPort();
        final int timeout = 500;
  
        final DiscoveryGroup dg = newDiscoveryGroup(RandomUtil.randomUUIDString(), RandomUtil.randomUUIDString(), InetAddress.getByName("localhost"), groupAddress, groupPort, timeout);
  
        final AtomicInteger errors = new AtomicInteger(0);
        Thread t = new Thread(() -> {
           try {
              dg.internalRunning();
           } catch (Throwable e) {
              e.printStackTrace();
              errors.incrementAndGet();
           }
  
        });
        t.start();
  
        BroadcastGroupImpl bg = null;
  
        try {
  
           bg = new BroadcastGroupImpl(new FakeNodeManager("test-nodeID"), RandomUtil.randomUUIDString(), 1, scheduledExecutorService, new UDPBroadcastEndpointFactory().setGroupAddress(address1).
              setGroupPort(groupPort));
  
           bg.start();
  
           bg.addConnector(generateTC());
  
           for (int i = 0; i < 10; i++) {
              BroadcastEndpointFactory factoryEndpoint = new UDPBroadcastEndpointFactory().setGroupAddress(address1).
                 setGroupPort(groupPort).setLocalBindAddress("localhost");
              sendBadData(factoryEndpoint);
  
           }
           Thread.sleep(100);
           assertTrue(t.isAlive());
           assertEquals(0, errors.get());
        } finally {
  
           if (bg != null) {
              bg.stop();
           }
  
           if (dg != null) {
              dg.stop();
           }
  
           t.join(1000);
  
           // it will retry for a limited time only
           for (int i = 0; t.isAlive() && i < 100; i++) {
              t.interrupt();
              Thread.sleep(100);
           }
        }
     }
  
     private static void sendBadData(BroadcastEndpointFactory factoryEndpoint) throws Exception {
        BroadcastEndpoint endpoint = factoryEndpoint.createBroadcastEndpoint();
  
        ActiveMQBuffer buffer = ActiveMQBuffers.dynamicBuffer(500);
  
        buffer.writeString("This is a test1!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
        buffer.writeString("This is a test2!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
  
        byte[] bytes = new byte[buffer.writerIndex()];
  
        buffer.readBytes(bytes);
  
        // messing up with the string!!!
        for (int i = bytes.length - 10; i < bytes.length; i++) {
           bytes[i] = 0;
        }
  
        endpoint.openBroadcaster();
  
        endpoint.broadcast(bytes);
  
        endpoint.close(true);
     }
  }
  