hadoop package-info 源码

  • 2022-10-20
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haddop package-info 代码


 * 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.

 * This package provides a mechanism for tracking NameNode startup
 * progress.  The package models NameNode startup as a series of {@link Phase}s,
 * with each phase further sub-divided into multiple {@link Step}s.  All phases
 * are coarse-grained and typically known in advance, implied by the structure of
 * the NameNode codebase (example: loading fsimage).  Steps are more granular and
 * typically only known at runtime after startup begins (example: loading a
 * specific fsimage file with a known length from a particular location).
 * {@link StartupProgress} provides a thread-safe data structure for
 * recording status information and counters.  Various parts of the NameNode
 * codebase use this to describe the NameNode's activities during startup.
 * {@link StartupProgressView} provides an immutable, consistent view of the
 * current state of NameNode startup progress.  This can be used to present the
 * data to a user.
 * {@link StartupProgressMetrics} exposes startup progress information via JMX
 * through the standard metrics system.
package org.apache.hadoop.hdfs.server.namenode.startupprogress;

import org.apache.hadoop.classification.InterfaceAudience;


hadoop 源码目录


hadoop AbstractTracking 源码

hadoop Phase 源码

hadoop PhaseTracking 源码

hadoop StartupProgress 源码

hadoop StartupProgressMetrics 源码

hadoop StartupProgressView 源码

hadoop Status 源码

hadoop Step 源码

hadoop StepTracking 源码

hadoop StepType 源码

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