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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
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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.assertNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.junit.jupiter.api.Assertions.fail;
  import static org.junit.jupiter.api.Assumptions.assumeTrue;
  
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.concurrent.Future;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.TimeoutException;
  
  import org.apache.activemq.artemis.core.server.cluster.quorum.QuorumVoteServerConnect;
  import org.apache.activemq.artemis.core.server.cluster.quorum.ServerConnectVote;
  import org.apache.activemq.artemis.tests.extensions.parameterized.ParameterizedTestExtension;
  import org.apache.activemq.artemis.tests.extensions.parameterized.Parameters;
  import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
  import org.junit.jupiter.api.TestTemplate;
  import org.junit.jupiter.api.extension.ExtendWith;
  
  @ExtendWith(ParameterizedTestExtension.class)
  public class QuorumVoteServerConnectTest extends ActiveMQTestBase {
  
     private final int size;
     private final int trueVotes;
  
     @Parameters(name = "size={0} trueVotes={1}")
     public static Collection primeNumbers() {
        return Arrays.asList(new Object[][]{{1, 0}, {2, 1}, {3, 2}, {4, 3}, {5, 3}, {6, 4}, {7, 4}, {8, 5}, {9, 5}, {10, 6}});
     }
  
     public QuorumVoteServerConnectTest(int size, int trueVotes) {
        this.size = size;
        this.trueVotes = trueVotes;
     }
  
     @TestTemplate
     public void testVoteOnRequestToStay() {
        assumeTrue(trueVotes > 0);
        assumeTrue(size > trueVotes);
        final String connector = "primary";
        final String backupConnector = "backup";
        QuorumVoteServerConnect quorum = new QuorumVoteServerConnect(size, "foo", true, connector);
        quorum.vote(new ServerConnectVote("foo", true, backupConnector));
        assertFalse(quorum.getDecision());
        for (int i = 0; i < trueVotes - 1; i++) {
           quorum.vote(new ServerConnectVote("foo", true, connector));
           assertFalse(quorum.getDecision());
        }
        quorum.vote(new ServerConnectVote("foo", true, connector));
        assertTrue(quorum.getDecision());
     }
  
     @TestTemplate
     public void testAllVoteCastFreezeNotRequestToStayDecision() {
        QuorumVoteServerConnect quorum = new QuorumVoteServerConnect(size, "foo");
        assertFalse(quorum.isRequestToStayActive());
        final boolean decisionBeforeVoteCompleted = quorum.getDecision();
        quorum.allVotesCast(null);
        for (int i = 0; i < trueVotes; i++) {
           quorum.vote(new ServerConnectVote("foo", true, null));
        }
        assertEquals(decisionBeforeVoteCompleted, quorum.getDecision());
     }
  
     @TestTemplate
     public void testAllVoteCastFreezeRequestToStayDecision() {
        final String connector = "primary";
        QuorumVoteServerConnect quorum = new QuorumVoteServerConnect(size, "foo", true, connector);
        assertTrue(quorum.isRequestToStayActive());
        final boolean decisionBeforeVoteCompleted = quorum.getDecision();
        quorum.allVotesCast(null);
        for (int i = 0; i < trueVotes; i++) {
           quorum.vote(new ServerConnectVote("foo", true, connector));
        }
        assertEquals(decisionBeforeVoteCompleted, quorum.getDecision());
     }
  
     @TestTemplate
     public void testAllVoteCastUnblockAwait() throws InterruptedException {
        assumeTrue(trueVotes > 0);
        assumeTrue(size > trueVotes);
        QuorumVoteServerConnect quorum = new QuorumVoteServerConnect(size, "foo");
        assertFalse(quorum.getDecision());
        CountDownLatch taskStarted = new CountDownLatch(1);
        ExecutorService executor = Executors.newSingleThreadExecutor();
        runAfter(executor::shutdownNow);
        final Future<InterruptedException> waitingTaskResult = executor.submit(() -> {
           taskStarted.countDown();
           try {
              quorum.await(1, TimeUnit.MINUTES);
              return null;
           } catch (InterruptedException e) {
              // preserve interrupt state
              Thread.currentThread().interrupt();
              return e;
           }
        });
        // realistic expectation of the max time to start a Thread
        assertTrue(taskStarted.await(10, TimeUnit.SECONDS));
        assertFalse(waitingTaskResult.isDone());
        quorum.allVotesCast(null);
        try {
           assertNull(waitingTaskResult.get(5, TimeUnit.SECONDS));
        } catch (TimeoutException ex) {
           fail("allVoteCast hasn't unblocked the waiting task");
        } catch (ExecutionException ex) {
           fail("This shouldn't really happen: the wait task shouldn't throw any exception: " + ex);
        }
        assertTrue(waitingTaskResult.isDone());
        assertFalse(quorum.getDecision());
     }
  
     @TestTemplate
     public void testRequestToStayQuorumUnblockAwait() throws InterruptedException {
        assumeTrue(trueVotes > 0);
        assumeTrue(size > trueVotes);
        final String connector = "primary";
        final String backupConnector = "backup";
        QuorumVoteServerConnect quorum = new QuorumVoteServerConnect(size, "foo", true, connector);
        assertFalse(quorum.getDecision());
        CountDownLatch taskStarted = new CountDownLatch(1);
        ExecutorService executor = Executors.newSingleThreadExecutor();
        runAfter(executor::shutdownNow);
        final Future<InterruptedException> waitingTaskResult = executor.submit(() -> {
           taskStarted.countDown();
           try {
              quorum.await(1, TimeUnit.MINUTES);
              return null;
           } catch (InterruptedException e) {
              // preserve interrupt state
              Thread.currentThread().interrupt();
              return e;
           }
        });
        // realistic expectation of the max time to start a Thread
        assertTrue(taskStarted.await(10, TimeUnit.SECONDS));
        quorum.vote(new ServerConnectVote("foo", true, backupConnector));
        assertFalse(waitingTaskResult.isDone());
        assertFalse(quorum.getDecision());
        for (int i = 0; i < trueVotes - 1; i++) {
           quorum.vote(new ServerConnectVote("foo", true, connector));
           assertFalse(waitingTaskResult.isDone());
           assertFalse(quorum.getDecision());
        }
        quorum.vote(new ServerConnectVote("foo", true, connector));
        assertTrue(quorum.getDecision());
        try {
           assertNull(waitingTaskResult.get(5, TimeUnit.SECONDS));
        } catch (TimeoutException ex) {
           fail("allVoteCast hasn't unblocked the waiting task");
        } catch (ExecutionException ex) {
           fail("This shouldn't really happen: the wait task shouldn't throw any exception: " + ex);
        }
        assertTrue(waitingTaskResult.isDone());
        assertTrue(quorum.getDecision());
     }
  
     @TestTemplate
     public void testNotRequestToStayQuorumUnblockAwait() throws InterruptedException {
        assumeTrue(trueVotes > 0);
        assumeTrue(size > trueVotes);
        QuorumVoteServerConnect quorum = new QuorumVoteServerConnect(size, "foo");
        assertFalse(quorum.getDecision());
        CountDownLatch taskStarted = new CountDownLatch(1);
        ExecutorService executor = Executors.newSingleThreadExecutor();
        runAfter(executor::shutdownNow);
        final Future<InterruptedException> waitingTaskResult = executor.submit(() -> {
           taskStarted.countDown();
           try {
              quorum.await(1, TimeUnit.MINUTES);
              return null;
           } catch (InterruptedException e) {
              // preserve interrupt state
              Thread.currentThread().interrupt();
              return e;
           }
        });
        // realistic expectation of the max time to start a Thread
        assertTrue(taskStarted.await(10, TimeUnit.SECONDS));
        quorum.vote(new ServerConnectVote("foo", false, null));
        assertFalse(waitingTaskResult.isDone());
        assertFalse(quorum.getDecision());
        for (int i = 0; i < trueVotes - 1; i++) {
           quorum.vote(new ServerConnectVote("foo", true, null));
           assertFalse(waitingTaskResult.isDone());
           assertFalse(quorum.getDecision());
        }
        quorum.vote(new ServerConnectVote("foo", true, null));
        assertTrue(quorum.getDecision());
        try {
           assertNull(waitingTaskResult.get(5, TimeUnit.SECONDS));
        } catch (TimeoutException ex) {
           fail("allVoteCast hasn't unblocked the waiting task");
        } catch (ExecutionException ex) {
           fail("This shouldn't really happen: the wait task shouldn't throw any exception: " + ex);
        }
        assertTrue(waitingTaskResult.isDone());
        assertTrue(quorum.getDecision());
     }
  
     @TestTemplate
     public void testSuccessfulVote() {
        QuorumVoteServerConnect quorum = new QuorumVoteServerConnect(size, "foo");
        for (int i = 0; i < trueVotes - 1; i++) {
           quorum.vote(new ServerConnectVote("foo", true, null));
        }
  
        if (size > 1) {
           assertFalse(quorum.getDecision());
        }
        quorum = new QuorumVoteServerConnect(size, "foo");
        for (int i = 0; i < trueVotes; i++) {
           quorum.vote(new ServerConnectVote("foo", true, null));
        }
        assertTrue(quorum.getDecision());
     }
  
     @TestTemplate
     public void testUnSuccessfulVote() {
        QuorumVoteServerConnect quorum = new QuorumVoteServerConnect(size, "foo");
        for (int i = 0; i < trueVotes - 1; i++) {
           quorum.vote(new ServerConnectVote("foo", true, null));
        }
  
        if (size > 1) {
           assertFalse(quorum.getDecision());
        }
        quorum = new QuorumVoteServerConnect(size, "foo");
        for (int i = 0; i < trueVotes - 1; i++) {
           quorum.vote(new ServerConnectVote("foo", true, null));
        }
        if (size == 1) {
           assertTrue(quorum.getDecision());
        } else {
           assertFalse(quorum.getDecision());
        }
     }
  }
  