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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.cql3;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.config.CassandraRelevantProperties;
  
  import static org.junit.Assert.assertEquals;
  
  import static org.apache.cassandra.db.ConsistencyLevel.NODE_LOCAL;
  import static org.apache.cassandra.metrics.ClientRequestsMetricsHolder.readMetrics;
  import static org.apache.cassandra.metrics.ClientRequestsMetricsHolder.readMetricsForLevel;
  import static org.apache.cassandra.metrics.ClientRequestsMetricsHolder.writeMetrics;
  import static org.apache.cassandra.metrics.ClientRequestsMetricsHolder.writeMetricsForLevel;
  
  public class NodeLocalConsistencyTest extends CQLTester
  {
      @BeforeClass
      public static void setUp() throws Exception
      {
          CassandraRelevantProperties.ENABLE_NODELOCAL_QUERIES.setBoolean(true);
          requireNetwork();
      }
  
      @Test
      public void testModify()
      {
          createTable("CREATE TABLE %s (key text, val int, PRIMARY KEY(key));");
  
          long beforeLevel  = writeMetricsForLevel(NODE_LOCAL).latency.getCount();
          long beforeGlobal = writeMetrics.latency.getCount();
  
          QueryProcessor.process(formatQuery("INSERT INTO %s (key, val) VALUES ('key', 0);"), NODE_LOCAL);
  
          long afterLevel  = writeMetricsForLevel(NODE_LOCAL).latency.getCount();
          long afterGlobal = writeMetrics.latency.getCount();
  
          assertEquals(1, afterLevel - beforeLevel);
          assertEquals(1, afterGlobal - beforeGlobal);
      }
  
      @Test
      public void testBatch()
      {
          createTable("CREATE TABLE %s (key text, val int, PRIMARY KEY(key));");
  
          long beforeLevel  = writeMetricsForLevel(NODE_LOCAL).latency.getCount();
          long beforeGlobal = writeMetrics.latency.getCount();
  
          QueryProcessor.process(formatQuery("BEGIN BATCH INSERT INTO %s (key, val) VALUES ('key', 0); APPLY BATCH;"), NODE_LOCAL);
  
          long afterLevel  = writeMetricsForLevel(NODE_LOCAL).latency.getCount();
          long afterGlobal = writeMetrics.latency.getCount();
  
          assertEquals(1, afterLevel - beforeLevel);
          assertEquals(1, afterGlobal - beforeGlobal);
      }
  
      @Test
      public void testSelect()
      {
          createTable("CREATE TABLE %s (key text, val int, PRIMARY KEY(key));");
  
          long beforeLevel  = readMetricsForLevel(NODE_LOCAL).latency.getCount();
          long beforeGlobal = readMetrics.latency.getCount();
  
          QueryProcessor.process(formatQuery("SELECT * FROM %s;"), NODE_LOCAL);
  
          long afterLevel  = readMetricsForLevel(NODE_LOCAL).latency.getCount();
          long afterGlobal = readMetrics.latency.getCount();
  
          assertEquals(1, afterLevel - beforeLevel);
          assertEquals(1, afterGlobal - beforeGlobal);
      }
  
      @Test
      public void testTransaction()
      {
          createTable("CREATE TABLE %s (key text, val int, PRIMARY KEY(key)) WITH transactional_mode='full'");
          QueryProcessor.process(formatQuery("INSERT INTO %s (key, val) VALUES ('foo', 0)"), NODE_LOCAL);
  
          String query = "BEGIN TRANSACTION\n" +
                         "  SELECT * FROM %s WHERE key = 'foo';\n" +
                         "COMMIT TRANSACTION";
  
          UntypedResultSet rows = QueryProcessor.process(formatQuery(query), NODE_LOCAL);
          assertEquals(1, rows.size());
      }
  }
  