hadoop ReplicatedBlockStats 源码

haddop ReplicatedBlockStats 代码

文件路径：/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocol/ReplicatedBlockStats.java

/**
 * 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.hdfs.protocol;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;

import java.util.Collection;

/**
 * Get statistics pertaining to blocks of type {@link BlockType#CONTIGUOUS}
 * in the filesystem.
 * <p>
 * @see ClientProtocol#getReplicatedBlockStats()
 */
@InterfaceAudience.Public
@InterfaceStability.Evolving
public final class ReplicatedBlockStats {
  private final long lowRedundancyBlocks;
  private final long corruptBlocks;
  private final long missingBlocks;
  private final long missingReplicationOneBlocks;
  private final long bytesInFutureBlocks;
  private final long pendingDeletionBlocks;
  private final Long highestPriorityLowRedundancyBlocks;

  public ReplicatedBlockStats(long lowRedundancyBlocks,
      long corruptBlocks, long missingBlocks,
      long missingReplicationOneBlocks, long bytesInFutureBlocks,
      long pendingDeletionBlocks) {
    this(lowRedundancyBlocks, corruptBlocks, missingBlocks,
        missingReplicationOneBlocks, bytesInFutureBlocks, pendingDeletionBlocks,
        null);
  }

  public ReplicatedBlockStats(long lowRedundancyBlocks,
      long corruptBlocks, long missingBlocks,
      long missingReplicationOneBlocks, long bytesInFutureBlocks,
      long pendingDeletionBlocks, Long highestPriorityLowRedundancyBlocks) {
    this.lowRedundancyBlocks = lowRedundancyBlocks;
    this.corruptBlocks = corruptBlocks;
    this.missingBlocks = missingBlocks;
    this.missingReplicationOneBlocks = missingReplicationOneBlocks;
    this.bytesInFutureBlocks = bytesInFutureBlocks;
    this.pendingDeletionBlocks = pendingDeletionBlocks;
    this.highestPriorityLowRedundancyBlocks
        = highestPriorityLowRedundancyBlocks;
  }

  public long getLowRedundancyBlocks() {
    return lowRedundancyBlocks;
  }

  public long getCorruptBlocks() {
    return corruptBlocks;
  }

  public long getMissingReplicaBlocks() {
    return missingBlocks;
  }

  public long getMissingReplicationOneBlocks() {
    return missingReplicationOneBlocks;
  }

  public long getBytesInFutureBlocks() {
    return bytesInFutureBlocks;
  }

  public long getPendingDeletionBlocks() {
    return pendingDeletionBlocks;
  }

  public boolean hasHighestPriorityLowRedundancyBlocks() {
    return getHighestPriorityLowRedundancyBlocks() != null;
  }

  public Long getHighestPriorityLowRedundancyBlocks(){
    return highestPriorityLowRedundancyBlocks;
  }

  @Override
  public String toString() {
    StringBuilder statsBuilder = new StringBuilder();
    statsBuilder.append("ReplicatedBlockStats=[")
        .append("LowRedundancyBlocks=").append(getLowRedundancyBlocks())
        .append(", CorruptBlocks=").append(getCorruptBlocks())
        .append(", MissingReplicaBlocks=").append(getMissingReplicaBlocks())
        .append(", MissingReplicationOneBlocks=").append(
            getMissingReplicationOneBlocks())
        .append(", BytesInFutureBlocks=").append(getBytesInFutureBlocks())
        .append(", PendingDeletionBlocks=").append(
            getPendingDeletionBlocks());
    if (hasHighestPriorityLowRedundancyBlocks()) {
        statsBuilder.append(", HighestPriorityLowRedundancyBlocks=").append(
            getHighestPriorityLowRedundancyBlocks());
    }
    statsBuilder.append("]");
    return statsBuilder.toString();
  }

  /**
   * Merge the multiple ReplicatedBlockStats.
   * @param stats Collection of stats to merge.
   * @return A new ReplicatedBlockStats merging all the input ones
   */
  public static ReplicatedBlockStats merge(
      Collection<ReplicatedBlockStats> stats) {
    long lowRedundancyBlocks = 0;
    long corruptBlocks = 0;
    long missingBlocks = 0;
    long missingReplicationOneBlocks = 0;
    long bytesInFutureBlocks = 0;
    long pendingDeletionBlocks = 0;
    long highestPriorityLowRedundancyBlocks = 0;
    boolean hasHighestPriorityLowRedundancyBlocks = false;

    // long's range is large enough that we don't need to consider overflow
    for (ReplicatedBlockStats stat : stats) {
      lowRedundancyBlocks += stat.getLowRedundancyBlocks();
      corruptBlocks += stat.getCorruptBlocks();
      missingBlocks += stat.getMissingReplicaBlocks();
      missingReplicationOneBlocks += stat.getMissingReplicationOneBlocks();
      bytesInFutureBlocks += stat.getBytesInFutureBlocks();
      pendingDeletionBlocks += stat.getPendingDeletionBlocks();
      if (stat.hasHighestPriorityLowRedundancyBlocks()) {
        hasHighestPriorityLowRedundancyBlocks = true;
        highestPriorityLowRedundancyBlocks +=
            stat.getHighestPriorityLowRedundancyBlocks();
      }
    }
    if (hasHighestPriorityLowRedundancyBlocks) {
      return new ReplicatedBlockStats(lowRedundancyBlocks, corruptBlocks,
          missingBlocks, missingReplicationOneBlocks, bytesInFutureBlocks,
          pendingDeletionBlocks, highestPriorityLowRedundancyBlocks);
    }
    return new ReplicatedBlockStats(lowRedundancyBlocks, corruptBlocks,
        missingBlocks, missingReplicationOneBlocks, bytesInFutureBlocks,
        pendingDeletionBlocks);
  }
}

相关信息

hadoop 源码目录

相关文章

hadoop AclException 源码

hadoop AddErasureCodingPolicyResponse 源码

hadoop AlreadyBeingCreatedException 源码

hadoop BatchedDirectoryListing 源码

hadoop Block 源码

hadoop BlockChecksumOptions 源码

hadoop BlockChecksumType 源码

hadoop BlockLocalPathInfo 源码

hadoop BlockStoragePolicy 源码

hadoop BlockType 源码