hadoop ECBlockGroupStats 源码

haddop ECBlockGroupStats 代码

文件路径：/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocol/ECBlockGroupStats.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 java.util.Collection;

import org.apache.commons.lang3.builder.EqualsBuilder;
import org.apache.commons.lang3.builder.HashCodeBuilder;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;

/**
 * Get statistics pertaining to blocks of type {@link BlockType#STRIPED}
 * in the filesystem.
 * <p>
 * @see ClientProtocol#getECBlockGroupStats()
 */
@InterfaceAudience.Public
@InterfaceStability.Evolving
public final class ECBlockGroupStats {
  private final long lowRedundancyBlockGroups;
  private final long corruptBlockGroups;
  private final long missingBlockGroups;
  private final long bytesInFutureBlockGroups;
  private final long pendingDeletionBlocks;
  private final Long highestPriorityLowRedundancyBlocks;

  public ECBlockGroupStats(long lowRedundancyBlockGroups,
      long corruptBlockGroups, long missingBlockGroups,
      long bytesInFutureBlockGroups, long pendingDeletionBlocks) {
    this(lowRedundancyBlockGroups, corruptBlockGroups, missingBlockGroups,
        bytesInFutureBlockGroups, pendingDeletionBlocks, null);
  }

  public ECBlockGroupStats(long lowRedundancyBlockGroups,
      long corruptBlockGroups, long missingBlockGroups,
      long bytesInFutureBlockGroups, long pendingDeletionBlocks,
      Long highestPriorityLowRedundancyBlocks) {
    this.lowRedundancyBlockGroups = lowRedundancyBlockGroups;
    this.corruptBlockGroups = corruptBlockGroups;
    this.missingBlockGroups = missingBlockGroups;
    this.bytesInFutureBlockGroups = bytesInFutureBlockGroups;
    this.pendingDeletionBlocks = pendingDeletionBlocks;
    this.highestPriorityLowRedundancyBlocks
        = highestPriorityLowRedundancyBlocks;
  }

  public long getBytesInFutureBlockGroups() {
    return bytesInFutureBlockGroups;
  }

  public long getCorruptBlockGroups() {
    return corruptBlockGroups;
  }

  public long getLowRedundancyBlockGroups() {
    return lowRedundancyBlockGroups;
  }

  public long getMissingBlockGroups() {
    return missingBlockGroups;
  }

  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("ECBlockGroupStats=[")
        .append("LowRedundancyBlockGroups=").append(
            getLowRedundancyBlockGroups())
        .append(", CorruptBlockGroups=").append(getCorruptBlockGroups())
        .append(", MissingBlockGroups=").append(getMissingBlockGroups())
        .append(", BytesInFutureBlockGroups=").append(
            getBytesInFutureBlockGroups())
        .append(", PendingDeletionBlocks=").append(
            getPendingDeletionBlocks());
    if (hasHighestPriorityLowRedundancyBlocks()) {
      statsBuilder.append(", HighestPriorityLowRedundancyBlocks=")
          .append(getHighestPriorityLowRedundancyBlocks());
    }
    statsBuilder.append("]");
    return statsBuilder.toString();
  }

  @Override
  public int hashCode() {
    return new HashCodeBuilder()
        .append(lowRedundancyBlockGroups)
        .append(corruptBlockGroups)
        .append(missingBlockGroups)
        .append(bytesInFutureBlockGroups)
        .append(pendingDeletionBlocks)
        .append(highestPriorityLowRedundancyBlocks)
        .toHashCode();
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }
    ECBlockGroupStats other = (ECBlockGroupStats)o;
    return new EqualsBuilder()
        .append(lowRedundancyBlockGroups, other.lowRedundancyBlockGroups)
        .append(corruptBlockGroups, other.corruptBlockGroups)
        .append(missingBlockGroups, other.missingBlockGroups)
        .append(bytesInFutureBlockGroups, other.bytesInFutureBlockGroups)
        .append(pendingDeletionBlocks, other.pendingDeletionBlocks)
        .append(highestPriorityLowRedundancyBlocks,
            other.highestPriorityLowRedundancyBlocks)
        .isEquals();
  }

  /**
   * Merge the multiple ECBlockGroupStats.
   * @param stats Collection of stats to merge.
   * @return A new ECBlockGroupStats merging all the input ones
   */
  public static ECBlockGroupStats merge(Collection<ECBlockGroupStats> stats) {
    long lowRedundancyBlockGroups = 0;
    long corruptBlockGroups = 0;
    long missingBlockGroups = 0;
    long bytesInFutureBlockGroups = 0;
    long pendingDeletionBlocks = 0;
    long highestPriorityLowRedundancyBlocks = 0;
    boolean hasHighestPriorityLowRedundancyBlocks = false;

    for (ECBlockGroupStats stat : stats) {
      lowRedundancyBlockGroups += stat.getLowRedundancyBlockGroups();
      corruptBlockGroups += stat.getCorruptBlockGroups();
      missingBlockGroups += stat.getMissingBlockGroups();
      bytesInFutureBlockGroups += stat.getBytesInFutureBlockGroups();
      pendingDeletionBlocks += stat.getPendingDeletionBlocks();
      if (stat.hasHighestPriorityLowRedundancyBlocks()) {
        hasHighestPriorityLowRedundancyBlocks = true;
        highestPriorityLowRedundancyBlocks +=
            stat.getHighestPriorityLowRedundancyBlocks();
      }
    }
    if (hasHighestPriorityLowRedundancyBlocks) {
      return new ECBlockGroupStats(lowRedundancyBlockGroups, corruptBlockGroups,
          missingBlockGroups, bytesInFutureBlockGroups, pendingDeletionBlocks,
          highestPriorityLowRedundancyBlocks);
    }
    return new ECBlockGroupStats(lowRedundancyBlockGroups, corruptBlockGroups,
        missingBlockGroups, bytesInFutureBlockGroups, 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