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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
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  package org.apache.cassandra.triggers;
  
  import java.util.*;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.Util;
  import org.apache.cassandra.schema.TableMetadata;
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.db.*;
  import org.apache.cassandra.db.rows.*;
  import org.apache.cassandra.db.marshal.UTF8Type;
  import org.apache.cassandra.db.partitions.Partition;
  import org.apache.cassandra.db.partitions.PartitionUpdate;
  import org.apache.cassandra.exceptions.ConfigurationException;
  import org.apache.cassandra.exceptions.InvalidRequestException;
  import org.apache.cassandra.schema.TriggerMetadata;
  import org.apache.cassandra.schema.Triggers;
  import org.apache.cassandra.utils.FBUtilities;
  
  import static org.apache.cassandra.utils.ByteBufferUtil.bytes;
  import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNull;
  
  public class TriggerExecutorTest
  {
      @BeforeClass
      public static void setupDD()
      {
          DatabaseDescriptor.daemonInitialization();
      }
  
      @Test
      public void sameKeySameCfColumnFamilies() throws ConfigurationException, InvalidRequestException
      {
          TableMetadata metadata = makeTableMetadata("ks1", "cf1", TriggerMetadata.create("test", SameKeySameCfTrigger.class.getName()));
          // origin column 'c1' = "v1", augment extra column 'c2' = "trigger"
          PartitionUpdate mutated = TriggerExecutor.instance.execute(makeCf(metadata, "k1", "v1", null));
  
          List<Row> rows = new ArrayList<>();
          try (RowIterator iterator = UnfilteredRowIterators.filter(mutated.unfilteredIterator(),
                                                                    FBUtilities.nowInSeconds()))
          {
              iterator.forEachRemaining(rows::add);
          }
  
          // only 1 row
          assertEquals(1, rows.size());
  
          List<Cell<?>> cells = new ArrayList<>();
          rows.get(0).cells().forEach(cells::add);
  
          // 2 columns
          assertEquals(2, cells.size());
  
          // check column 'c1'
          assertEquals(bytes("v1"), cells.get(0).value());
          // check column 'c2'
          assertEquals(bytes("trigger"), cells.get(1).value());
      }
  
      @Test(expected = InvalidRequestException.class)
      public void sameKeyDifferentCfColumnFamilies() throws ConfigurationException, InvalidRequestException
      {
          TableMetadata metadata = makeTableMetadata("ks1", "cf1", TriggerMetadata.create("test", SameKeyDifferentCfTrigger.class.getName()));
          TriggerExecutor.instance.execute(makeCf(metadata, "k1", "v1", null));
      }
  
      @Test(expected = InvalidRequestException.class)
      public void differentKeyColumnFamilies() throws ConfigurationException, InvalidRequestException
      {
          TableMetadata metadata = makeTableMetadata("ks1", "cf1", TriggerMetadata.create("test", DifferentKeyTrigger.class.getName()));
          TriggerExecutor.instance.execute(makeCf(metadata, "k1", "v1", null));
      }
  
      @Test
      public void triggerClassNotFound()
      {
          TableMetadata metadata = makeTableMetadata("ks1", "cf1", TriggerMetadata.create("test", "NotExistedTriggerClass"));
          assertThatExceptionOfType(ConfigurationException.class)
          .isThrownBy(()-> TriggerExecutor.instance.execute(makeCf(metadata, "k1", "v1", null)))
          .withMessageContaining("Trigger class NotExistedTriggerClass couldn't be found.");
      }
  
      @Test
      public void noTriggerMutations() throws ConfigurationException, InvalidRequestException
      {
          TableMetadata metadata = makeTableMetadata("ks1", "cf1", TriggerMetadata.create("test", NoOpTrigger.class.getName()));
          Mutation rm = new Mutation(makeCf(metadata, "k1", "v1", null));
          assertNull(TriggerExecutor.instance.execute(Collections.singletonList(rm)));
      }
  
      @Test
      public void sameKeySameCfRowMutations() throws ConfigurationException, InvalidRequestException
      {
          TableMetadata metadata = makeTableMetadata("ks1", "cf1", TriggerMetadata.create("test", SameKeySameCfTrigger.class.getName()));
          PartitionUpdate cf1 = makeCf(metadata, "k1", "k1v1", null);
          PartitionUpdate cf2 = makeCf(metadata, "k2", "k2v1", null);
          Mutation rm1 = new Mutation.PartitionUpdateCollector("ks1", cf1.partitionKey()).add(cf1).build();
          Mutation rm2 = new Mutation.PartitionUpdateCollector("ks1", cf2.partitionKey()).add(cf2).build();
  
          List<? extends IMutation> tmutations = new ArrayList<>(TriggerExecutor.instance.execute(Arrays.asList(rm1, rm2)));
          assertEquals(2, tmutations.size());
          Collections.sort(tmutations, new RmComparator());
  
          List<PartitionUpdate> mutatedCFs = new ArrayList<>(tmutations.get(0).getPartitionUpdates());
          assertEquals(1, mutatedCFs.size());
          Row row = mutatedCFs.get(0).iterator().next();
          assertEquals(bytes("k1v1"), row.getCell(metadata.getColumn(bytes("c1"))).value());
          assertEquals(bytes("trigger"), row.getCell(metadata.getColumn(bytes("c2"))).value());
  
          mutatedCFs = new ArrayList<>(tmutations.get(1).getPartitionUpdates());
          assertEquals(1, mutatedCFs.size());
          row = mutatedCFs.get(0).iterator().next();
          assertEquals(bytes("k2v1"), row.getCell(metadata.getColumn(bytes("c1"))).value());
          assertEquals(bytes("trigger"), row.getCell(metadata.getColumn(bytes("c2"))).value());
      }
  
      @Test
      public void sameKeySameCfPartialRowMutations() throws ConfigurationException, InvalidRequestException
      {
          TableMetadata metadata = makeTableMetadata("ks1", "cf1", TriggerMetadata.create("test", SameKeySameCfPartialTrigger.class.getName()));
          PartitionUpdate cf1 = makeCf(metadata, "k1", "k1v1", null);
          PartitionUpdate cf2 = makeCf(metadata, "k2", "k2v1", null);
          Mutation rm1 = new Mutation.PartitionUpdateCollector("ks1", cf1.partitionKey()).add(cf1).build();
          Mutation rm2 = new Mutation.PartitionUpdateCollector("ks1", cf2.partitionKey()).add(cf2).build();
  
          List<? extends IMutation> tmutations = new ArrayList<>(TriggerExecutor.instance.execute(Arrays.asList(rm1, rm2)));
          assertEquals(2, tmutations.size());
          Collections.sort(tmutations, new RmComparator());
  
          List<PartitionUpdate> mutatedCFs = new ArrayList<>(tmutations.get(0).getPartitionUpdates());
          assertEquals(1, mutatedCFs.size());
          Row row = mutatedCFs.get(0).iterator().next();
          assertEquals(bytes("k1v1"), row.getCell(metadata.getColumn(bytes("c1"))).value());
          assertNull(row.getCell(metadata.getColumn(bytes("c2"))));
  
          mutatedCFs = new ArrayList<>(tmutations.get(1).getPartitionUpdates());
          assertEquals(1, mutatedCFs.size());
          row = mutatedCFs.get(0).iterator().next();
          assertEquals(bytes("k2v1"), row.getCell(metadata.getColumn(bytes("c1"))).value());
          assertEquals(bytes("trigger"), row.getCell(metadata.getColumn(bytes("c2"))).value());
      }
  
      @Test
      public void sameKeyDifferentCfRowMutations() throws ConfigurationException, InvalidRequestException
      {
          TableMetadata metadata = makeTableMetadata("ks1", "cf1", TriggerMetadata.create("test", SameKeyDifferentCfTrigger.class.getName()));
          PartitionUpdate cf1 = makeCf(metadata, "k1", "k1v1", null);
          PartitionUpdate cf2 = makeCf(metadata, "k2", "k2v1", null);
          Mutation rm1 = new Mutation.PartitionUpdateCollector("ks1", cf1.partitionKey()).add(cf1).build();
          Mutation rm2 = new Mutation.PartitionUpdateCollector("ks1", cf2.partitionKey()).add(cf2).build();
  
          List<? extends IMutation> tmutations = new ArrayList<>(TriggerExecutor.instance.execute(Arrays.asList(rm1, rm2)));
          assertEquals(2, tmutations.size());
          Collections.sort(tmutations, new RmComparator());
  
          List<PartitionUpdate> mutatedCFs = new ArrayList<>(tmutations.get(0).getPartitionUpdates());
          assertEquals(2, mutatedCFs.size());
          for (PartitionUpdate update : mutatedCFs)
          {
              if (update.metadata().name.equals("cf1"))
              {
                  Row row = update.iterator().next();
                  assertEquals(bytes("k1v1"), row.getCell(metadata.getColumn(bytes("c1"))).value());
                  assertNull(row.getCell(metadata.getColumn(bytes("c2"))));
              }
              else
              {
                  Row row = update.iterator().next();
                  assertNull(row.getCell(metadata.getColumn(bytes("c1"))));
                  assertEquals(bytes("trigger"), row.getCell(metadata.getColumn(bytes("c2"))).value());
              }
          }
  
          mutatedCFs = new ArrayList<>(tmutations.get(1).getPartitionUpdates());
          assertEquals(2, mutatedCFs.size());
  
          for (PartitionUpdate update : mutatedCFs)
          {
              if (update.metadata().name.equals("cf1"))
              {
                  Row row = update.iterator().next();
                  assertEquals(bytes("k2v1"), row.getCell(metadata.getColumn(bytes("c1"))).value());
                  assertNull(row.getCell(metadata.getColumn(bytes("c2"))));
              }
              else
              {
                  Row row = update.iterator().next();
                  assertNull(row.getCell(metadata.getColumn(bytes("c1"))));
                  assertEquals(bytes("trigger"), row.getCell(metadata.getColumn(bytes("c2"))).value());
              }
          }
      }
  
      @Test
      public void sameKeyDifferentKsRowMutations() throws ConfigurationException, InvalidRequestException
      {
          TableMetadata metadata = makeTableMetadata("ks1", "cf1", TriggerMetadata.create("test", SameKeyDifferentKsTrigger.class.getName()));
          PartitionUpdate cf1 = makeCf(metadata, "k1", "k1v1", null);
          PartitionUpdate cf2 = makeCf(metadata, "k2", "k2v1", null);
          Mutation rm1 = new Mutation.PartitionUpdateCollector("ks1", cf1.partitionKey()).add(cf1).build();
          Mutation rm2 = new Mutation.PartitionUpdateCollector("ks1", cf2.partitionKey()).add(cf2).build();
  
          List<? extends IMutation> tmutations = new ArrayList<>(TriggerExecutor.instance.execute(Arrays.asList(rm1, rm2)));
          assertEquals(4, tmutations.size());
          Collections.sort(tmutations, new RmComparator());
  
          List<PartitionUpdate> mutatedCFs = new ArrayList<>(tmutations.get(0).getPartitionUpdates());
          assertEquals(1, mutatedCFs.size());
          Row row = mutatedCFs.get(0).iterator().next();
          assertEquals(bytes("k1v1"), row.getCell(metadata.getColumn(bytes("c1"))).value());
          assertNull(row.getCell(metadata.getColumn(bytes("c2"))));
  
          mutatedCFs = new ArrayList<>(tmutations.get(1).getPartitionUpdates());
          assertEquals(1, mutatedCFs.size());
          row = mutatedCFs.get(0).iterator().next();
          assertEquals(bytes("k2v1"), row.getCell(metadata.getColumn(bytes("c1"))).value());
          assertNull(row.getCell(metadata.getColumn(bytes("c2"))));
  
          mutatedCFs = new ArrayList<>(tmutations.get(2).getPartitionUpdates());
          assertEquals(1, mutatedCFs.size());
          row = mutatedCFs.get(0).iterator().next();
          assertNull(row.getCell(metadata.getColumn(bytes("c1"))));
          assertEquals(bytes("trigger"), row.getCell(metadata.getColumn(bytes("c2"))).value());
  
          mutatedCFs = new ArrayList<>(tmutations.get(3).getPartitionUpdates());
          assertEquals(1, mutatedCFs.size());
          row = mutatedCFs.get(0).iterator().next();
          assertNull(row.getCell(metadata.getColumn(bytes("c1"))));
          assertEquals(bytes("trigger"), row.getCell(metadata.getColumn(bytes("c2"))).value());
      }
  
      @Test
      public void differentKeyRowMutations() throws ConfigurationException, InvalidRequestException
      {
  
          TableMetadata metadata = makeTableMetadata("ks1", "cf1", TriggerMetadata.create("test", DifferentKeyTrigger.class.getName()));
          PartitionUpdate cf1 = makeCf(metadata, "k1", "v1", null);
          Mutation rm = new Mutation.PartitionUpdateCollector("ks1", cf1.partitionKey()).add(cf1).build();
  
          List<? extends IMutation> tmutations = new ArrayList<>(TriggerExecutor.instance.execute(Arrays.asList(rm)));
          assertEquals(2, tmutations.size());
          Collections.sort(tmutations, new RmComparator());
  
          assertEquals(bytes("k1"), tmutations.get(0).key().getKey());
          assertEquals(bytes("otherKey"), tmutations.get(1).key().getKey());
  
          List<PartitionUpdate> mutatedCFs = new ArrayList<>(tmutations.get(0).getPartitionUpdates());
          assertEquals(1, mutatedCFs.size());
          Row row = mutatedCFs.get(0).iterator().next();
          assertEquals(bytes("v1"), row.getCell(metadata.getColumn(bytes("c1"))).value());
          assertNull(row.getCell(metadata.getColumn(bytes("c2"))));
  
          mutatedCFs = new ArrayList<>(tmutations.get(1).getPartitionUpdates());
          assertEquals(1, mutatedCFs.size());
          row = mutatedCFs.get(0).iterator().next();
          assertEquals(bytes("trigger"), row.getCell(metadata.getColumn(bytes("c2"))).value());
          assertNull(row.getCell(metadata.getColumn(bytes("c1"))));
      }
  
      private static TableMetadata makeTableMetadata(String ks, String cf, TriggerMetadata trigger)
      {
          TableMetadata.Builder builder =
              TableMetadata.builder(ks, cf)
                           .addPartitionKeyColumn("pkey", UTF8Type.instance)
                           .addRegularColumn("c1", UTF8Type.instance)
                           .addRegularColumn("c2", UTF8Type.instance);
  
          if (trigger != null)
              builder.triggers(Triggers.of(trigger));
  
          return builder.build();
      }
  
      private static PartitionUpdate makeCf(TableMetadata metadata, String key, String columnValue1, String columnValue2)
      {
          Row.Builder builder = BTreeRow.unsortedBuilder();
          builder.newRow(Clustering.EMPTY);
          long ts = FBUtilities.timestampMicros();
          if (columnValue1 != null)
              builder.addCell(BufferCell.live(metadata.getColumn(bytes("c1")), ts, bytes(columnValue1)));
          if (columnValue2 != null)
              builder.addCell(BufferCell.live(metadata.getColumn(bytes("c2")), ts, bytes(columnValue2)));
  
          return PartitionUpdate.singleRowUpdate(metadata, Util.dk(key), builder.build());
      }
  
      public static class NoOpTrigger implements ITrigger
      {
          public Collection<Mutation> augment(Partition partition)
          {
              return null;
          }
      }
  
      public static class SameKeySameCfTrigger implements ITrigger
      {
          public Collection<Mutation> augment(Partition partition)
          {
              RowUpdateBuilder builder = new RowUpdateBuilder(partition.metadata(), FBUtilities.timestampMicros(), partition.partitionKey().getKey());
              builder.add("c2", bytes("trigger"));
              return Collections.singletonList(builder.build());
          }
      }
  
      public static class SameKeySameCfPartialTrigger implements ITrigger
      {
          public Collection<Mutation> augment(Partition partition)
          {
              if (!partition.partitionKey().getKey().equals(bytes("k2")))
                  return null;
  
              RowUpdateBuilder builder = new RowUpdateBuilder(partition.metadata(), FBUtilities.timestampMicros(), partition.partitionKey().getKey());
              builder.add("c2", bytes("trigger"));
              return Collections.singletonList(builder.build());
          }
      }
  
      public static class SameKeyDifferentCfTrigger implements ITrigger
      {
          public Collection<Mutation> augment(Partition partition)
          {
              RowUpdateBuilder builder = new RowUpdateBuilder(makeTableMetadata(partition.metadata().keyspace, "otherCf", null), FBUtilities.timestampMicros(), partition.partitionKey().getKey());
              builder.add("c2", bytes("trigger"));
              return Collections.singletonList(builder.build());
          }
      }
  
      public static class SameKeyDifferentKsTrigger implements ITrigger
      {
          public Collection<Mutation> augment(Partition partition)
          {
              RowUpdateBuilder builder = new RowUpdateBuilder(makeTableMetadata("otherKs", "otherCf", null), FBUtilities.timestampMicros(), partition.partitionKey().getKey());
              builder.add("c2", bytes("trigger"));
              return Collections.singletonList(builder.build());
          }
      }
  
      public static class DifferentKeyTrigger implements ITrigger
      {
          public Collection<Mutation> augment(Partition partition)
          {
              RowUpdateBuilder builder = new RowUpdateBuilder(makeTableMetadata("otherKs", "otherCf", null), FBUtilities.timestampMicros(), "otherKey");
              builder.add("c2", bytes("trigger"));
              return Collections.singletonList(builder.build());
          }
      }
  
      private static class RmComparator implements Comparator<IMutation>
      {
          public int compare(IMutation m1, IMutation m2)
          {
              int cmp = m1.getKeyspaceName().compareTo(m2.getKeyspaceName());
              return cmp != 0 ? cmp : m1.key().compareTo(m2.key());
          }
      }
  }
  