org.apache.hadoop.hbase.monitoring

Class TaskMonitor

java.lang.Object

org.apache.hadoop.hbase.monitoring.TaskMonitor

@InterfaceAudience.Private
public class TaskMonitor
extends Object

Singleton which keeps track of tasks going on in this VM. A Task here is anything which takes more than a few seconds and the user might want to inquire about the status

Constructor Summary

Constructors

Constructor and Description
TaskMonitor()

Method Summary

Methods

Modifier and Type	Method and Description
MonitoredRPCHandler	createRPCStatus(String description)
MonitoredTask	createStatus(String description)
void	dumpAsText(PrintWriter out)
static TaskMonitor	get() Get singleton instance.
List<MonitoredTask>	getTasks() Produces a list containing copies of the current state of all non-expired MonitoredTasks handled by this TaskMonitor.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TaskMonitor

public TaskMonitor()

Method Detail

get

public static TaskMonitor get()

Get singleton instance. TODO this would be better off scoped to a single daemon

createStatus

public MonitoredTask createStatus(String description)

createRPCStatus

public MonitoredRPCHandler createRPCStatus(String description)

getTasks

public List<MonitoredTask> getTasks()

Produces a list containing copies of the current state of all non-expired MonitoredTasks handled by this TaskMonitor.

Returns:

A complete list of MonitoredTasks.

dumpAsText

public void dumpAsText(PrintWriter out)