TransactionScannerCallable.java

/**
 * Copyright 2009 The Apache Software Foundation
 *
 * 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.hadoop.hbase.client.transactional;

import java.io.IOException;

import org.apache.hadoop.hbase.client.HConnection;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.client.ScannerCallable;
import org.apache.hadoop.hbase.ipc.TransactionalRegionInterface;

class TransactionScannerCallable extends ScannerCallable {

  private TransactionState transactionState;

  TransactionScannerCallable(final TransactionState transactionState,
      final HConnection connection, final byte[] tableName, Scan scan) {
    super(connection, tableName,  scan);
    this.transactionState = transactionState;
  }

  @Override
  protected long openScanner() throws IOException {
    if (transactionState.addRegion(location)) {
      ((TransactionalRegionInterface) server).beginTransaction(transactionState
          .getTransactionId(), location.getRegionInfo().getRegionName());
    }
    return ((TransactionalRegionInterface) server).openScanner(transactionState
        .getTransactionId(), this.location.getRegionInfo().getRegionName(),
        getScan());
  }
}