IndexedRegionServer.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.regionserver.tableindexed;

import java.io.IOException;

import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.ipc.HBaseRPCProtocolVersion;
import org.apache.hadoop.hbase.ipc.IndexedRegionInterface;
import org.apache.hadoop.hbase.regionserver.HRegion;
import org.apache.hadoop.hbase.regionserver.transactional.TransactionalRegionServer;
import org.apache.hadoop.util.Progressable;

/**
 * RegionServer which maintains secondary indexes.
 * 
 **/
public class IndexedRegionServer extends TransactionalRegionServer implements
    IndexedRegionInterface {

  public IndexedRegionServer(HBaseConfiguration conf) throws IOException {
    super(conf);
  }

  @Override
  public long getProtocolVersion(final String protocol, final long clientVersion)
      throws IOException {
    if (protocol.equals(IndexedRegionInterface.class.getName())) {
      return HBaseRPCProtocolVersion.versionID;
    }
    return super.getProtocolVersion(protocol, clientVersion);
  }

  @Override
  protected HRegion instantiateRegion(final HRegionInfo regionInfo)
      throws IOException {
    HRegion r = new IndexedRegion(HTableDescriptor.getTableDir(super
        .getRootDir(), regionInfo.getTableDesc().getName()), super.hlog, super
        .getFileSystem(), super.conf, regionInfo, super.getFlushRequester(), super.getTransactionalLeases());
    r.initialize(null, new Progressable() {
      public void progress() {
        addProcessingMessage(regionInfo);
      }
    });
    return r;
  }

}