/*
 * 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.phoenix.iterate;

import java.sql.SQLException;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.hadoop.hbase.HRegionLocation;
import org.apache.phoenix.compile.StatementContext;

/**
 * ParallelScanGrouper implementation used for testing Phoenix-MapReduce Integration
 */
public class TestingMapReduceParallelScanGrouper extends MapReduceParallelScanGrouper {

  private static final AtomicInteger numCallsToGetRegionBoundaries = new AtomicInteger(0);
  private static final TestingMapReduceParallelScanGrouper INSTANCE =
    new TestingMapReduceParallelScanGrouper();

  public static TestingMapReduceParallelScanGrouper getInstance() {
    return INSTANCE;
  }

  @Override
  public List<HRegionLocation> getRegionBoundaries(StatementContext context, byte[] tableName)
    throws SQLException {
    List<HRegionLocation> regionLocations = super.getRegionBoundaries(context, tableName);
    numCallsToGetRegionBoundaries.incrementAndGet();
    return regionLocations;
  }

  @Override
  public List<HRegionLocation> getRegionBoundaries(StatementContext context, byte[] tableName,
    byte[] startRegionBoundaryKey, byte[] stopRegionBoundaryKey) throws SQLException {
    List<HRegionLocation> regionLocations =
      super.getRegionBoundaries(context, tableName, startRegionBoundaryKey, stopRegionBoundaryKey);
    numCallsToGetRegionBoundaries.incrementAndGet();
    return regionLocations;
  }

  public static int getNumCallsToGetRegionBoundaries() {
    return numCallsToGetRegionBoundaries.get();
  }

  public static void clearNumCallsToGetRegionBoundaries() {
    numCallsToGetRegionBoundaries.set(0);
  }
}
