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.cassandra.service;
  
  import java.net.UnknownHostException;
  import java.util.concurrent.TimeUnit;
  import java.util.function.Consumer;
  
  import com.google.common.util.concurrent.Uninterruptibles;
  import org.junit.Assert;
  import org.junit.BeforeClass;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  
  import org.apache.cassandra.ServerTestUtils;
  import org.apache.cassandra.config.Config;
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.distributed.test.log.ClusterMetadataTestHelper;
  import org.apache.cassandra.gms.EndpointState;
  import org.apache.cassandra.gms.Gossiper;
  import org.apache.cassandra.gms.HeartBeatState;
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.locator.Replica;
  import org.apache.cassandra.tcm.ClusterMetadata;
  import org.apache.cassandra.tcm.ClusterMetadataService;
  import org.apache.cassandra.tcm.StubClusterMetadataService;
  import org.jboss.byteman.contrib.bmunit.BMRule;
  import org.jboss.byteman.contrib.bmunit.BMUnitRunner;
  
  import static org.apache.cassandra.locator.ReplicaUtils.full;
  import static org.assertj.core.api.Assertions.assertThat;
  
  @RunWith(BMUnitRunner.class)
  public class StorageProxyTest
  {
      @BeforeClass
      public static void initDD()
      {
          DatabaseDescriptor.daemonInitialization();
          ServerTestUtils.mkdirs();
      }
  
      @Test
      public void testSetGetPaxosVariant()
      {
          StorageProxy.instance.setPaxosVariant("v1"); // test-latest uses v2 as default, ensure we are starting with a known state
          Assert.assertEquals(Config.PaxosVariant.v1, DatabaseDescriptor.getPaxosVariant());
          Assert.assertEquals("v1", StorageProxy.instance.getPaxosVariant());
          StorageProxy.instance.setPaxosVariant("v2");
          Assert.assertEquals("v2", StorageProxy.instance.getPaxosVariant());
          Assert.assertEquals(Config.PaxosVariant.v2, DatabaseDescriptor.getPaxosVariant());
          DatabaseDescriptor.setPaxosVariant(Config.PaxosVariant.v1);
          Assert.assertEquals(Config.PaxosVariant.v1, DatabaseDescriptor.getPaxosVariant());
          Assert.assertEquals(Config.PaxosVariant.v1, DatabaseDescriptor.getPaxosVariant());
      }
  
      @Test
      public void testShouldHint() throws Exception
      {
          // HAPPY PATH with all defaults
          shouldHintTest(replica -> {
              assertThat(StorageProxy.shouldHint(replica)).isTrue();
              assertThat(StorageProxy.shouldHint(replica, /* tryEnablePersistentWindow */ false)).isTrue();
          });
      }
  
      @Test
      public void testShouldHintOnWindowExpiry() throws Exception
      {
          shouldHintTest(replica -> {
              // wait for 5 ms, we will shorten the hints window later
              Uninterruptibles.sleepUninterruptibly(5, TimeUnit.MILLISECONDS);
  
              final int originalHintWindow = DatabaseDescriptor.getMaxHintWindow();
              try
              {
                  DatabaseDescriptor.setMaxHintWindow(1); // 1 ms. It should not hint
                  assertThat(StorageProxy.shouldHint(replica)).isFalse();
              }
              finally
              {
                  DatabaseDescriptor.setMaxHintWindow(originalHintWindow);
              }
          });
      }
  
      @Test
      @BMRule(name = "Hints size exceeded the limit",
              targetClass="org.apache.cassandra.hints.HintsService",
              targetMethod="getTotalHintsSize",
              action="return 2097152;") // 2MB
      public void testShouldHintOnExceedingSize() throws Exception
      {
          shouldHintTest(replica -> {
              final int originalHintsSizeLimit = DatabaseDescriptor.getMaxHintsSizePerHostInMiB();
              try
              {
                  DatabaseDescriptor.setMaxHintsSizePerHostInMiB(1);
                  assertThat(StorageProxy.shouldHint(replica)).isFalse();
              }
              finally
              {
                  DatabaseDescriptor.setMaxHintsSizePerHostInMiB(originalHintsSizeLimit);
              }
          });
      }
  
  
      /**
       * Ensure that the timer backing the JMX endpoint to transiently enable blocking read repairs both enables
       * and disables the way we'd expect.
       */
      @Test
      public void testTransientLoggingTimer()
      {
          StorageProxy.instance.logBlockingReadRepairAttemptsForNSeconds(2);
          Assert.assertTrue(StorageProxy.instance.isLoggingReadRepairs());
          Uninterruptibles.sleepUninterruptibly(5, TimeUnit.SECONDS);
          Assert.assertFalse(StorageProxy.instance.isLoggingReadRepairs());
      }
  
      private void shouldHintTest(Consumer<Replica> test) throws UnknownHostException
      {
          InetAddressAndPort testEp = InetAddressAndPort.getByName("192.168.1.1");
          ClusterMetadataService.unsetInstance();
          ClusterMetadataService.setInstance(StubClusterMetadataService.forTesting());
          ClusterMetadataTestHelper.addEndpoint(testEp, ClusterMetadata.current().partitioner.getRandomToken());
          Replica replica = full(testEp);
          EndpointState state = new EndpointState(new HeartBeatState(0, 0));
          Gossiper.runInGossipStageBlocking(() -> Gossiper.instance.markDead(replica.endpoint(), state));
  
          test.accept(replica);
      }
  }
  