Package io.trino.server.remotetask

Class TaskInfoFetcher

java.lang.Object

io.trino.server.remotetask.TaskInfoFetcher

All Implemented Interfaces:

SimpleHttpResponseCallback<TaskInfo>

public class TaskInfoFetcher
extends Object
implements SimpleHttpResponseCallback<TaskInfo>

Constructor Summary

Constructors

Constructor

Description

TaskInfoFetcher(Consumer<Throwable> onFail, io.trino.server.remotetask.ContinuousTaskStatusFetcher taskStatusFetcher, TaskInfo initialTask, io.airlift.http.client.HttpClient httpClient, io.airlift.units.Duration updateInterval, io.airlift.json.JsonCodec<TaskInfo> taskInfoCodec, io.airlift.units.Duration maxErrorDuration, boolean summarizeTaskInfo, Executor executor, ScheduledExecutorService updateScheduledExecutor, ScheduledExecutorService errorScheduledExecutor, RemoteTaskStats stats)

Method Summary

Modifier and Type	Method	Description
void	addFinalTaskInfoListener(StateMachine.StateChangeListener<TaskInfo> stateChangeListener)	Add a listener for the final task info.
void	failed(Throwable cause)
void	fatal(Throwable cause)
TaskInfo	getTaskInfo()
void	start()
void	success(TaskInfo newValue)

Methods inherited from class java.lang.Object

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

Constructor Details

TaskInfoFetcher

public TaskInfoFetcher(Consumer<Throwable> onFail,
 io.trino.server.remotetask.ContinuousTaskStatusFetcher taskStatusFetcher,
 TaskInfo initialTask,
 io.airlift.http.client.HttpClient httpClient,
 io.airlift.units.Duration updateInterval,
 io.airlift.json.JsonCodec<TaskInfo> taskInfoCodec,
 io.airlift.units.Duration maxErrorDuration,
 boolean summarizeTaskInfo,
 Executor executor,
 ScheduledExecutorService updateScheduledExecutor,
 ScheduledExecutorService errorScheduledExecutor,
 RemoteTaskStats stats)

Method Details

getTaskInfo

public TaskInfo getTaskInfo()

start

public void start()

addFinalTaskInfoListener

public void addFinalTaskInfoListener(StateMachine.StateChangeListener<TaskInfo> stateChangeListener)

Add a listener for the final task info. This notification is guaranteed to be fired only once. Listener is always notified asynchronously using a dedicated notification thread pool so, care should be taken to avoid leaking this when adding a listener in a constructor. Additionally, it is possible notifications are observed out of order due to the asynchronous execution.

success

public void success(TaskInfo newValue)

Specified by:

success in interface SimpleHttpResponseCallback<TaskInfo>

failed

public void failed(Throwable cause)

Specified by:

failed in interface SimpleHttpResponseCallback<TaskInfo>

fatal

public void fatal(Throwable cause)

Specified by:

fatal in interface SimpleHttpResponseCallback<TaskInfo>