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   * Licensed to the Apache Software Foundation (ASF) under one
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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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  package org.apache.cassandra.db;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.Util;
  import org.apache.cassandra.schema.ColumnMetadata;
  import org.apache.cassandra.SchemaLoader;
  import org.apache.cassandra.db.rows.Row;
  import org.apache.cassandra.db.context.CounterContext;
  import org.apache.cassandra.exceptions.ConfigurationException;
  import org.apache.cassandra.exceptions.WriteTimeoutException;
  import org.apache.cassandra.schema.KeyspaceParams;
  import org.apache.cassandra.utils.ByteBufferUtil;
  
  import static org.junit.Assert.assertEquals;
  
  public class CounterMutationTest
  {
      private static final String KEYSPACE1 = "CounterMutationTest";
      private static final String CF1 = "Counter1";
      private static final String CF2 = "Counter2";
  
      @BeforeClass
      public static void defineSchema() throws ConfigurationException
      {
          SchemaLoader.prepareServer();
          SchemaLoader.createKeyspace(KEYSPACE1,
                                      KeyspaceParams.simple(1),
                                      SchemaLoader.counterCFMD(KEYSPACE1, CF1),
                                      SchemaLoader.counterCFMD(KEYSPACE1, CF2));
      }
  
      @Test
      public void testSingleCell() throws WriteTimeoutException
      {
          ColumnFamilyStore cfs = Keyspace.open(KEYSPACE1).getColumnFamilyStore(CF1);
          cfs.truncateBlocking();
          ColumnMetadata cDef = cfs.metadata().getColumn(ByteBufferUtil.bytes("val"));
  
          // Do the initial update (+1)
          addAndCheck(cfs, 1, 1);
  
          // Make another increment (+2)
          addAndCheck(cfs, 2, 3);
  
          // Decrement to 0 (-3)
          addAndCheck(cfs, -3, 0);
      }
  
      private void addAndCheck(ColumnFamilyStore cfs, long toAdd, long expected)
      {
          ColumnMetadata cDef = cfs.metadata().getColumn(ByteBufferUtil.bytes("val"));
          Mutation m = new RowUpdateBuilder(cfs.metadata(), 5, "key1").clustering("cc").add("val", toAdd).build();
          new CounterMutation(m, ConsistencyLevel.ONE).apply();
  
          Row row = Util.getOnlyRow(Util.cmd(cfs).includeRow("cc").columns("val").build());
          assertEquals(expected, CounterContext.instance().total(row.getCell(cDef)));
      }
  
      @Test
      public void testTwoCells() throws WriteTimeoutException
      {
          ColumnFamilyStore cfs = Keyspace.open(KEYSPACE1).getColumnFamilyStore(CF1);
          cfs.truncateBlocking();
  
          // Do the initial update (+1, -1)
          addTwoAndCheck(cfs, 1L, 1L, -1L, -1L);
  
          // Make another increment (+2, -2)
          addTwoAndCheck(cfs, 2L, 3L, -2L, -3L);
  
          // Decrement to 0 (-3, +3)
          addTwoAndCheck(cfs, -3L, 0L, 3L, 0L);
      }
  
      private void addTwoAndCheck(ColumnFamilyStore cfs, long addOne, long expectedOne, long addTwo, long expectedTwo)
      {
          ColumnMetadata cDefOne = cfs.metadata().getColumn(ByteBufferUtil.bytes("val"));
          ColumnMetadata cDefTwo = cfs.metadata().getColumn(ByteBufferUtil.bytes("val2"));
  
          Mutation m = new RowUpdateBuilder(cfs.metadata(), 5, "key1")
              .clustering("cc")
              .add("val", addOne)
              .add("val2", addTwo)
              .build();
          new CounterMutation(m, ConsistencyLevel.ONE).apply();
  
          Row row = Util.getOnlyRow(Util.cmd(cfs).includeRow("cc").columns("val", "val2").build());
          assertEquals(expectedOne, CounterContext.instance().total(row.getCell(cDefOne)));
          assertEquals(expectedTwo, CounterContext.instance().total(row.getCell(cDefTwo)));
      }
  
      @Test
      public void testBatch() throws WriteTimeoutException
      {
          ColumnFamilyStore cfsOne = Keyspace.open(KEYSPACE1).getColumnFamilyStore(CF1);
          ColumnFamilyStore cfsTwo = Keyspace.open(KEYSPACE1).getColumnFamilyStore(CF2);
  
          cfsOne.truncateBlocking();
          cfsTwo.truncateBlocking();
  
          // Do the update (+1, -1), (+2, -2)
          Mutation.PartitionUpdateCollector batch = new Mutation.PartitionUpdateCollector(KEYSPACE1, Util.dk("key1"));
          batch.add(new RowUpdateBuilder(cfsOne.metadata(), 5, "key1")
              .clustering("cc")
              .add("val", 1L)
              .add("val2", -1L)
              .build().getPartitionUpdate(cfsOne.metadata()));
  
          batch.add(new RowUpdateBuilder(cfsTwo.metadata(), 5, "key1")
              .clustering("cc")
              .add("val", 2L)
              .add("val2", -2L)
              .build().getPartitionUpdate(cfsTwo.metadata()));
  
          new CounterMutation(batch.build(), ConsistencyLevel.ONE).apply();
  
          ColumnMetadata c1cfs1 = cfsOne.metadata().getColumn(ByteBufferUtil.bytes("val"));
          ColumnMetadata c2cfs1 = cfsOne.metadata().getColumn(ByteBufferUtil.bytes("val2"));
  
          Row row = Util.getOnlyRow(Util.cmd(cfsOne).includeRow("cc").columns("val", "val2").build());
          assertEquals(1L, CounterContext.instance().total(row.getCell(c1cfs1)));
          assertEquals(-1L, CounterContext.instance().total(row.getCell(c2cfs1)));
  
          ColumnMetadata c1cfs2 = cfsTwo.metadata().getColumn(ByteBufferUtil.bytes("val"));
          ColumnMetadata c2cfs2 = cfsTwo.metadata().getColumn(ByteBufferUtil.bytes("val2"));
          row = Util.getOnlyRow(Util.cmd(cfsTwo).includeRow("cc").columns("val", "val2").build());
          assertEquals(2L, CounterContext.instance().total(row.getCell(c1cfs2)));
          assertEquals(-2L, CounterContext.instance().total(row.getCell(c2cfs2)));
  
          // Check the caches, separately
          CBuilder cb = CBuilder.create(cfsOne.metadata().comparator);
          cb.add("cc");
  
          assertEquals(1L, cfsOne.getCachedCounter(Util.dk("key1").getKey(), cb.build(), c1cfs1, null).count);
          assertEquals(-1L, cfsOne.getCachedCounter(Util.dk("key1").getKey(), cb.build(), c2cfs1, null).count);
  
          assertEquals(2L, cfsTwo.getCachedCounter(Util.dk("key1").getKey(), cb.build(), c1cfs2, null).count);
          assertEquals(-2L, cfsTwo.getCachedCounter(Util.dk("key1").getKey(), cb.build(), c2cfs2, null).count);
      }
  
      @Test
      public void testDeletes() throws WriteTimeoutException
      {
          ColumnFamilyStore cfs = Keyspace.open(KEYSPACE1).getColumnFamilyStore(CF1);
          cfs.truncateBlocking();
          ColumnMetadata cOne = cfs.metadata().getColumn(ByteBufferUtil.bytes("val"));
          ColumnMetadata cTwo = cfs.metadata().getColumn(ByteBufferUtil.bytes("val2"));
  
          // Do the initial update (+1, -1)
          new CounterMutation(
              new RowUpdateBuilder(cfs.metadata(), 5, "key1")
                  .clustering("cc")
                  .add("val", 1L)
                  .add("val2", -1L)
                  .build(),
              ConsistencyLevel.ONE).apply();
  
          Row row = Util.getOnlyRow(Util.cmd(cfs).includeRow("cc").columns("val", "val2").build());
          assertEquals(1L, CounterContext.instance().total(row.getCell(cOne)));
          assertEquals(-1L, CounterContext.instance().total(row.getCell(cTwo)));
  
          // Remove the first counter, increment the second counter
          new CounterMutation(
              new RowUpdateBuilder(cfs.metadata(), 5, "key1")
                  .clustering("cc")
                  .delete(cOne)
                  .add("val2", -5L)
                  .build(),
              ConsistencyLevel.ONE).apply();
  
          row = Util.getOnlyRow(Util.cmd(cfs).includeRow("cc").columns("val", "val2").build());
          assertEquals(null, row.getCell(cOne));
          assertEquals(-6L, CounterContext.instance().total(row.getCell(cTwo)));
  
          // Increment the first counter, make sure it's still shadowed by the tombstone
          new CounterMutation(
              new RowUpdateBuilder(cfs.metadata(), 5, "key1")
                  .clustering("cc")
                  .add("val", 1L)
                  .build(),
              ConsistencyLevel.ONE).apply();
          row = Util.getOnlyRow(Util.cmd(cfs).includeRow("cc").columns("val", "val2").build());
          assertEquals(null, row.getCell(cOne));
  
          // Get rid of the complete partition
          RowUpdateBuilder.deleteRow(cfs.metadata(), 6, "key1", "cc").applyUnsafe();
          Util.assertEmpty(Util.cmd(cfs).includeRow("cc").columns("val", "val2").build());
  
          // Increment both counters, ensure that both stay dead
          new CounterMutation(
              new RowUpdateBuilder(cfs.metadata(), 6, "key1")
                  .clustering("cc")
                  .add("val", 1L)
                  .add("val2", 1L)
                  .build(),
              ConsistencyLevel.ONE).apply();
          Util.assertEmpty(Util.cmd(cfs).includeRow("cc").columns("val", "val2").build());
      }
  }
  