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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,
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   * See the License for the specific language governing permissions and
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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.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.util.concurrent.TimeUnit;
  
  import org.apache.activemq.artemis.api.core.QueueConfiguration;
  import org.apache.activemq.artemis.api.core.TransportConfiguration;
  import org.apache.activemq.artemis.api.core.client.ClientSession;
  import org.apache.activemq.artemis.api.core.client.ClientSessionFactory;
  import org.apache.activemq.artemis.api.core.client.ServerLocator;
  import org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl;
  import org.apache.activemq.artemis.logs.AssertionLoggerHandler;
  import org.apache.activemq.artemis.tests.util.TransportConfigurationUtils;
  import org.apache.activemq.artemis.tests.util.Wait;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import java.lang.invoke.MethodHandles;
  
  public class NetworkIsolationTest extends FailoverTestBase {
  
     private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
  
     // This address is guaranteed to fail... reserved for documentation https://tools.ietf.org/html/rfc5737
     private static final String badAddress = "203.0.113.1";
  
     @BeforeEach
     @Override
     public void setUp() throws Exception {
        this.startBackupServer = false;
        super.setUp();
     }
  
     @Override
     protected TransportConfiguration getAcceptorTransportConfiguration(final boolean live) {
        return TransportConfigurationUtils.getNettyAcceptor(live, 1);
     }
  
     @Override
     protected TransportConfiguration getConnectorTransportConfiguration(final boolean live) {
        return TransportConfigurationUtils.getNettyConnector(live, 1);
     }
  
     @Test
     public void testReactivate() throws Exception {
        primaryServer.getServer().getConfiguration().setNetworkCheckPeriod(100).setNetworkCheckTimeout(200);
        primaryServer.start();
  
        assertTrue(Wait.waitFor(primaryServer::isActive));
  
        primaryServer.getServer().getNetworkHealthCheck().addAddress(badAddress);
  
        Wait.assertFalse(primaryServer::isStarted);
  
        primaryServer.getServer().getNetworkHealthCheck().clearAddresses();
  
        assertTrue(Wait.waitFor(primaryServer::isStarted));
     }
  
     @Test
     public void testDoNotActivateOnIsolation() throws Exception {
  
        try (AssertionLoggerHandler loggerHandler = new AssertionLoggerHandler()) {
           ServerLocator locator = getServerLocator();
  
           // this block here is just to validate if ignoring loopback addresses logic is in place
           {
              backupServer.getServer().getNetworkHealthCheck().addAddress("127.0.0.1");
  
              assertTrue(loggerHandler.findText("AMQ202001"));
  
              backupServer.getServer().getNetworkHealthCheck().setIgnoreLoopback(true).addAddress("127.0.0.1");
  
              assertEquals(1, loggerHandler.countText("AMQ202001"));
  
              backupServer.getServer().getNetworkHealthCheck().clearAddresses();
           }
  
           backupServer.getServer().getNetworkHealthCheck().addAddress(badAddress);
           backupServer.getServer().start();
  
           ClientSessionFactory sf = addSessionFactory(locator.createSessionFactory());
  
           ClientSession session = createSession(sf, false, true, true);
  
           session.createQueue(QueueConfiguration.of(FailoverTestBase.ADDRESS));
  
           assertFalse(backupServer.getServer().getNetworkHealthCheck().check());
  
           crash(false, true, session);
  
           for (int i = 0; i < 1000 && !backupServer.isStarted(); i++) {
              Thread.sleep(10);
           }
  
           assertTrue(backupServer.isStarted());
           assertFalse(backupServer.isActive());
  
           primaryServer.start();
  
           for (int i = 0; i < 1000 && getReplicationEndpoint(backupServer.getServer()) != null && !getReplicationEndpoint(backupServer.getServer()).isStarted(); i++) {
              Thread.sleep(10);
           }
  
           backupServer.getServer().getNetworkHealthCheck().clearAddresses();
  
           // This will make sure the backup got synchronized after the network was activated again
           assertTrue(getReplicationEndpoint(backupServer.getServer()).isStarted());
        }
     }
  
     @Test
     public void testPrimaryIsolated() throws Exception {
        backupServer.stop();
  
        FakeServiceComponent component = new FakeServiceComponent("Component for " + getName());
  
        primaryServer.getServer().addExternalComponent(component, true);
        primaryServer.getServer().getConfiguration().setNetworkCheckList(badAddress).
           setNetworkCheckPeriod(100).setNetworkCheckTimeout(100);
        ((ActiveMQServerImpl) primaryServer.getServer()).reloadNetworkHealthCheck();
  
        try {
  
           assertEquals(100L, primaryServer.getServer().getNetworkHealthCheck().getPeriod());
  
           primaryServer.getServer().getNetworkHealthCheck().setTimeUnit(TimeUnit.MILLISECONDS);
  
           assertFalse(primaryServer.getServer().getNetworkHealthCheck().check());
  
           Wait.assertFalse(primaryServer::isStarted);
  
           primaryServer.getServer().getNetworkHealthCheck().setIgnoreLoopback(true).addAddress("127.0.0.1");
  
           Wait.assertTrue(primaryServer::isStarted);
  
           assertTrue(component.isStarted());
        } catch (Throwable e) {
           logger.warn(e.getMessage(), e);
           throw e;
        } finally {
           primaryServer.getServer().stop();
           backupServer.getServer().stop();
        }
  
     }
  
     @Override
     protected void createConfigs() throws Exception {
        createReplicatedConfigs();
     }
  
     @Override
     protected void crash(boolean failover, boolean waitFailure, ClientSession... sessions) throws Exception {
        if (sessions.length > 0) {
           for (ClientSession session : sessions) {
              waitForRemoteBackup(session.getSessionFactory(), 5, true, backupServer.getServer());
           }
        } else {
           waitForRemoteBackup(null, 5, true, backupServer.getServer());
        }
        super.crash(failover, waitFailure, sessions);
     }
  }
  