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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
   * limitations under the License.
   */
  
  package org.apache.cassandra.service;
  
  import java.io.IOException;
  import java.util.Arrays;
  import java.util.Collection;
  
  import org.junit.After;
  import org.junit.Before;
  import org.junit.BeforeClass;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.Parameterized;
  
  import org.apache.cassandra.SchemaLoader;
  import org.apache.cassandra.config.Config.DiskFailurePolicy;
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.db.DisallowedDirectories;
  import org.apache.cassandra.exceptions.ConfigurationException;
  import org.apache.cassandra.gms.Gossiper;
  import org.apache.cassandra.io.FSReadError;
  import org.apache.cassandra.io.sstable.CorruptSSTableException;
  import org.apache.cassandra.io.util.File;
  import org.apache.cassandra.utils.JVMStabilityInspector;
  import org.apache.cassandra.utils.KillerForTests;
  
  import static org.apache.cassandra.config.CassandraRelevantProperties.JOIN_RING;
  import static org.apache.cassandra.config.Config.DiskFailurePolicy.best_effort;
  import static org.apache.cassandra.config.Config.DiskFailurePolicy.die;
  import static org.apache.cassandra.config.Config.DiskFailurePolicy.ignore;
  import static org.apache.cassandra.config.Config.DiskFailurePolicy.stop;
  import static org.apache.cassandra.config.Config.DiskFailurePolicy.stop_paranoid;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  @RunWith(Parameterized.class)
  public class DiskFailurePolicyTest
  {
      DiskFailurePolicy originalDiskFailurePolicy;
      JVMStabilityInspector.Killer originalKiller;
      KillerForTests killerForTests;
      DiskFailurePolicy testPolicy;
      boolean isStartUpInProgress;
      Throwable t;
      boolean expectGossipRunning;
      boolean expectJVMKilled;
      boolean expectJVMKilledQuiet;
  
  
      @BeforeClass
      public static void defineSchema() throws ConfigurationException
      {
          JOIN_RING.setBoolean(false); // required to start gossiper without setting tokens
          SchemaLoader.prepareServer();
          StorageService.instance.initServer();
          DiskErrorsHandlerService.configure();
      }
  
      public DiskFailurePolicyTest(DiskFailurePolicy testPolicy, boolean isStartUpInProgress, Throwable t,
                                   boolean expectGossipRunning, boolean jvmKilled, boolean jvmKilledQuiet)
      {
          this.testPolicy = testPolicy;
          this.isStartUpInProgress = isStartUpInProgress;
          this.t = t;
          this.expectGossipRunning = expectGossipRunning;
          this.expectJVMKilled = jvmKilled;
          this.expectJVMKilledQuiet = jvmKilledQuiet;
      }
  
      @Parameterized.Parameters
      public static Collection<Object[]> generateData()
      {
          return Arrays.asList(new Object[][]{
                               { die, true, new FSReadError(new IOException(), "blah"), false, true, true},
                               { ignore, true, new FSReadError(new IOException(), "blah"), true, false, false},
                               { stop, true, new FSReadError(new IOException(), "blah"), false, true, true},
                               { stop_paranoid, true, new FSReadError(new IOException(), "blah"), false, true, true},
                               { die, true, new CorruptSSTableException(new IOException(), "blah"), false, true, true},
                               { ignore, true, new CorruptSSTableException(new IOException(), "blah"), true, false, false},
                               { stop, true, new CorruptSSTableException(new IOException(), "blah"), false, true, true},
                               { stop_paranoid, true, new CorruptSSTableException(new IOException(), "blah"), false, true, true},
                               { die, false, new FSReadError(new IOException(), "blah"), false, true, false},
                               { ignore, false, new FSReadError(new IOException(), "blah"), true, false, false},
                               { stop, false, new FSReadError(new IOException(), "blah"), false, false, false},
                               { stop_paranoid, false, new FSReadError(new IOException(), "blah"), false, false, false},
                               { die, false, new CorruptSSTableException(new IOException(), "blah"), false, true, false},
                               { ignore, false, new CorruptSSTableException(new IOException(), "blah"), true, false, false},
                               { stop, false, new CorruptSSTableException(new IOException(), "blah"), true, false, false},
                               { stop_paranoid, false, new CorruptSSTableException(new IOException(), "blah"), false, false, false},
                               { best_effort, false, new FSReadError(new IOException(new OutOfMemoryError("Java heap space")), "best_effort_oom"), true, false, false},
                               { best_effort, false, new FSReadError(new IOException(), "best_effort_io_exception"), true, false, false},
                               }
          );
      }
  
      @Before
      public void setup()
      {
          CassandraDaemon daemon = new CassandraDaemon();
          if (!isStartUpInProgress)
              daemon.completeSetup(); //mark startup completed
          StorageService.instance.registerDaemon(daemon);
          killerForTests = new KillerForTests();
          originalKiller = JVMStabilityInspector.replaceKiller(killerForTests);
          originalDiskFailurePolicy = DatabaseDescriptor.getDiskFailurePolicy();
          StorageService.instance.startGossiping();
          assertTrue(Gossiper.instance.isEnabled());
      }
  
      @After
      public void teardown()
      {
          JVMStabilityInspector.replaceKiller(originalKiller);
          DatabaseDescriptor.setDiskFailurePolicy(originalDiskFailurePolicy);
      }
  
      @Test
      public void testPolicies()
      {
          DatabaseDescriptor.setDiskFailurePolicy(testPolicy);
          try
          {
              JVMStabilityInspector.inspectThrowable(t);
          }
          catch (OutOfMemoryError e)
          {
              if (testPolicy == best_effort)
              {
                  if (t.getCause().getCause() != e)
                      throw e;
              }
              else
                  throw e;
          }
  
          if (testPolicy == best_effort && ((FSReadError) t).path.equals("best_effort_io_exception"))
              assertTrue(DisallowedDirectories.isUnreadable(new File("best_effort_io_exception")));
  
          // when we have OOM, as cause, there is no reason to remove data
          if (testPolicy == best_effort && ((FSReadError) t).path.equals("best_effort_oom"))
              assertFalse(DisallowedDirectories.isUnreadable(new File("best_effort_oom")));
  
          assertEquals(expectJVMKilled, killerForTests.wasKilled());
          assertEquals(expectJVMKilledQuiet, killerForTests.wasKilledQuietly());
          if (!expectJVMKilled)
          {
              // only verify gossip if JVM is not killed
              assertEquals(expectGossipRunning, Gossiper.instance.isEnabled());
          }
      }
  }
  