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Server functionality for HBase

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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.hadoop.hbase.replication.regionserver;

import java.util.concurrent.PriorityBlockingQueue;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.yetus.audience.InterfaceAudience;
import org.apache.yetus.audience.InterfaceStability;
import org.apache.hadoop.hbase.replication.WALEntryFilter;

/**
 * Used by a {@link RecoveredReplicationSourceShipper}.
 */
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class RecoveredReplicationSourceWALReader extends ReplicationSourceWALReader {
  private static final Log LOG = LogFactory.getLog(RecoveredReplicationSourceWALReader.class);

  public RecoveredReplicationSourceWALReader(FileSystem fs, Configuration conf,
      PriorityBlockingQueue logQueue, long startPosition, WALEntryFilter filter,
      ReplicationSource source) {
    super(fs, conf, logQueue, startPosition, filter, source);
  }

  protected void handleEmptyWALEntryBatch(WALEntryBatch batch, Path currentPath)
      throws InterruptedException {
    LOG.trace("Didn't read any new entries from WAL");
    // we're done with queue recovery, shut ourself down
    setReaderRunning(false);
    // shuts down shipper thread immediately
    entryBatchQueue.put(batch != null ? batch
        : new WALEntryBatch(replicationBatchCountCapacity, currentPath));
  }
}