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   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
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   *
   *     http://www.apache.org/licenses/LICENSE-2.0
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   * 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.cassandra.distributed.test;
  
  import java.io.IOException;
  import java.util.Collections;
  import java.util.List;
  import java.util.Map;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.TimeoutException;
  
  import com.google.common.collect.ImmutableMap;
  import org.apache.cassandra.utils.JVMStabilityInspector;
  import org.junit.Test;
  
  import org.apache.cassandra.concurrent.Stage;
  import org.apache.cassandra.config.Config;
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.distributed.Cluster;
  import org.apache.cassandra.distributed.api.ConsistencyLevel;
  import org.apache.cassandra.distributed.api.Feature;
  import org.apache.cassandra.distributed.api.LogAction;
  import org.apache.cassandra.utils.FBUtilities;
  import org.assertj.core.api.Assertions;
  
  import static org.apache.cassandra.distributed.shared.AssertUtils.row;
  import static org.apache.cassandra.distributed.shared.AssertUtils.assertRows;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertNotNull;
  
  public class JVMDTestTest extends TestBaseImpl
  {
      @Test
      public void insertTimestampTest() throws IOException
      {
          try (Cluster cluster = init(Cluster.build(1).start()))
          {
              long now = FBUtilities.timestampMicros();
              cluster.schemaChange("CREATE TABLE "+KEYSPACE+".tbl (id int primary key, i int)");
              cluster.coordinator(1).execute("INSERT INTO "+KEYSPACE+".tbl (id, i) VALUES (1,1)", ConsistencyLevel.ALL);
              cluster.coordinator(1).execute("INSERT INTO "+KEYSPACE+".tbl (id, i) VALUES (2,2) USING TIMESTAMP 1000", ConsistencyLevel.ALL);
  
              Object [][] res = cluster.coordinator(1).execute("SELECT writetime(i) FROM "+KEYSPACE+".tbl WHERE id = 1", ConsistencyLevel.ALL);
              assertEquals(1, res.length);
              assertTrue("ts="+res[0][0], (long)res[0][0] >= now);
  
              res = cluster.coordinator(1).execute("SELECT writetime(i) FROM "+KEYSPACE+".tbl WHERE id = 2", ConsistencyLevel.ALL);
              assertEquals(1, res.length);
              assertEquals(1000, (long) res[0][0]);
          }
      }
  
      @Test
      public void instanceLogs() throws IOException, TimeoutException
      {
          try (Cluster cluster = init(Cluster.build(2).withConfig(c -> c.with(Feature.values())).start()))
          {
              // debug logging is turned on so we will see debug logs
              Assertions.assertThat(cluster.get(1).logs().grep("^DEBUG").getResult()).isNotEmpty();
              // make sure an exception is thrown in the cluster
              LogAction logs = cluster.get(2).logs();
              long mark = logs.mark(); // get the current position so watching doesn't see any previous exceptions
              cluster.get(2).runOnInstance(() -> {
                  // pretend that an uncaught exception was thrown
                  JVMStabilityInspector.uncaughtException(Thread.currentThread(), new RuntimeException("fail without fail"));
              });
              List<String> errors = logs.watchFor(mark, "^ERROR").getResult();
              Assertions.assertThat(errors)
                        // can't check for "fail without fail" since thats on the next line, and watchFor doesn't
                        // stitch lines together like grepForError does
                        .allMatch(s -> s.contains("ERROR"))
                        .allMatch(s -> s.contains("isolatedExecutor"))
                        .allMatch(s -> s.contains("Exception in thread"))
                        .as("Unable to find 'ERROR', 'isolatedExecutor', and 'Exception in thread'")
                        .isNotEmpty();
          }
      }
  
      @Test
      public void jvmArgumentLoggingTest() throws IOException
      {
          try (Cluster cluster = Cluster.build(1).start())
          {
              LogAction logs = cluster.get(1).logs();
              Assertions.assertThat(logs.grep("JVM Arguments").getResult()).isNotEmpty();
          }
      }
  
      @Test
      public void nonSharedConfigClassTest() throws IOException
      {
          Map<String,Object> commitLogCompression = ImmutableMap.of("class_name", "org.apache.cassandra.io.compress.LZ4Compressor",
                                                                    "parameters", Collections.<String,Object>emptyMap());
          Map<String,Object> encryptionOptions = ImmutableMap.of("cipher_suites", Collections.singletonList("FakeCipher"),
                                                                 "optional", false,
                                                                 "enabled", false);
  
          try (Cluster cluster = Cluster.build(1)
                                        .withConfig(c -> {
                                            c.set("concurrent_reads", 321);
                                            c.set("internode_compression", Config.InternodeCompression.dc);
                                            c.set("client_encryption_options", encryptionOptions);
                                            c.set("commitlog_compression", commitLogCompression);
                                        }).start())
          {
              cluster.get(1).runOnInstance(() -> {
                  assertEquals(321, Stage.READ.getMaximumPoolSize());
                  assertEquals(Config.InternodeCompression.dc, DatabaseDescriptor.internodeCompression());
                  assertEquals(Collections.singletonList("FakeCipher"), DatabaseDescriptor.getNativeProtocolEncryptionOptions().cipher_suites);
                  assertEquals("org.apache.cassandra.io.compress.LZ4Compressor", DatabaseDescriptor.getCommitLogCompression().class_name);
                  assertTrue(DatabaseDescriptor.getCommitLogCompression().parameters.isEmpty());
              });
          }
      }
  
      @Test
      public void modifySchemaWithStoppedNode() throws Throwable
      {
          try (Cluster cluster = init(Cluster.build().withNodes(2).withConfig(c -> c.with(Feature.GOSSIP).with(Feature.NETWORK)).start()))
          {
              assertFalse(cluster.get(1).isShutdown());
              assertFalse(cluster.get(2).isShutdown());
              cluster.schemaChangeIgnoringStoppedInstances("CREATE TABLE "+KEYSPACE+".tbl1 (id int primary key, i int)");
  
              cluster.get(2).shutdown(true).get(1, TimeUnit.MINUTES);
              assertFalse(cluster.get(1).isShutdown());
              assertTrue(cluster.get(2).isShutdown());
              cluster.schemaChangeIgnoringStoppedInstances("CREATE TABLE "+KEYSPACE+".tbl2 (id int primary key, i int)");
  
              cluster.get(1).shutdown(true).get(1, TimeUnit.MINUTES);
              assertTrue(cluster.get(1).isShutdown());
              assertTrue(cluster.get(2).isShutdown());
  
              // both nodes down, nothing to record a schema change so should get an exception
              Throwable thrown = null;
              try
              {
                  cluster.schemaChangeIgnoringStoppedInstances("CREATE TABLE " + KEYSPACE + ".tblX (id int primary key, i int)");
              }
              catch (Throwable tr)
              {
                  thrown = tr;
              }
              assertNotNull("Expected to fail with all nodes down", thrown);
  
              // Have to restart instance1 before instance2 as it is hard-coded as the seed in in-JVM configuration.
              cluster.get(1).startup();
              cluster.get(2).startup();
              assertFalse(cluster.get(1).isShutdown());
              assertFalse(cluster.get(2).isShutdown());
              cluster.schemaChangeIgnoringStoppedInstances("CREATE TABLE "+KEYSPACE+".tbl3 (id int primary key, i int)");
  
              assertRows(cluster.get(1).executeInternal("SELECT table_name FROM system_schema.tables WHERE keyspace_name = ?", KEYSPACE),
                         row("tbl1"), row("tbl2"), row("tbl3"));
              assertRows(cluster.get(2).executeInternal("SELECT table_name FROM system_schema.tables WHERE keyspace_name = ?", KEYSPACE),
                         row("tbl1"), row("tbl2"), row("tbl3"));
  
              // Finally test schema can be changed with the non-CMS node down
              cluster.get(2).shutdown(true).get(1, TimeUnit.MINUTES);
              cluster.schemaChangeIgnoringStoppedInstances("CREATE TABLE "+KEYSPACE+".tbl4 (id int primary key, i int)");
              assertRows(cluster.get(1).executeInternal("SELECT table_name FROM system_schema.tables WHERE keyspace_name = ?", KEYSPACE),
                         row("tbl1"), row("tbl2"), row("tbl3"), row("tbl4"));
              // Restart the down node and check it catches up with the new schema
              cluster.get(2).startup();
              assertRows(cluster.get(2).executeInternal("SELECT table_name FROM system_schema.tables WHERE keyspace_name = ?", KEYSPACE),
                         row("tbl1"), row("tbl2"), row("tbl3"), row("tbl4"));
          }
      }
  }
  