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HBASE-21521 Expose master startup status via web UI
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95 changes: 95 additions & 0 deletions
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hbase-server/src/main/java/org/apache/hadoop/hbase/monitoring/TaskGroup.java
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| @@ -0,0 +1,95 @@ | ||
| /* | ||
| * 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.monitoring; | ||
|
|
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| import java.util.Collection; | ||
| import java.util.Collections; | ||
| import java.util.concurrent.ConcurrentLinkedDeque; | ||
| import org.apache.yetus.audience.InterfaceAudience; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
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| @InterfaceAudience.Private | ||
| public class TaskGroup extends MonitoredTaskImpl { | ||
| private static final Logger LOG = LoggerFactory.getLogger(TaskGroup.class); | ||
|
|
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| private final ConcurrentLinkedDeque<MonitoredTask> tasks = new ConcurrentLinkedDeque<>(); | ||
| private final boolean ignoreClearStatus; | ||
|
|
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| public TaskGroup(boolean ignoreClearStatus) { | ||
| super(false); | ||
| this.ignoreClearStatus = ignoreClearStatus; | ||
| } | ||
|
|
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| public TaskGroup() { | ||
| this(false); | ||
| } | ||
|
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| public static TaskGroup createTaskGroup(boolean ignoreClearStatus) { | ||
| return new TaskGroup(ignoreClearStatus); | ||
| } | ||
|
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| public synchronized MonitoredTask addTask(String description) { | ||
| return addTask(description, true); | ||
| } | ||
|
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| public synchronized MonitoredTask addTask(String description, boolean withCompleteLast) { | ||
| if (withCompleteLast) { | ||
| MonitoredTask previousTask = this.tasks.peekLast(); | ||
| if ( | ||
| previousTask != null && previousTask.getState() != State.COMPLETE | ||
| && previousTask.getState() != State.ABORTED | ||
| ) { | ||
| previousTask.markComplete("Completed"); | ||
| } | ||
| } | ||
| MonitoredTask task = TaskMonitor.get().createStatus(description, ignoreClearStatus, true); | ||
| this.setStatus(description); | ||
| this.tasks.addLast(task); | ||
| return task; | ||
| } | ||
|
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| public synchronized Collection<MonitoredTask> getTasks() { | ||
| return Collections.unmodifiableCollection(this.tasks); | ||
| } | ||
|
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| @Override | ||
| public synchronized void abort(String msg) { | ||
| setStatus(msg); | ||
| setState(State.ABORTED); | ||
| for (MonitoredTask task : tasks) { | ||
| if (task.getState() != State.COMPLETE && task.getState() != State.ABORTED) { | ||
| task.abort(msg); | ||
| } | ||
| } | ||
| } | ||
|
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| @Override | ||
| public synchronized void markComplete(String msg) { | ||
| setState(State.COMPLETE); | ||
| setStatus(msg); | ||
| if (tasks.getLast() != null) { | ||
| tasks.getLast().markComplete(msg); | ||
| } | ||
| } | ||
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| @Override | ||
| public synchronized void cleanup() { | ||
| this.tasks.clear(); | ||
| } | ||
| } |
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