io.druid.indexing.common.task

Class HadoopConverterTask.ConverterSubTask

java.lang.Object

io.druid.indexing.common.task.AbstractTask

io.druid.indexing.common.task.HadoopTask

io.druid.indexing.common.task.HadoopConverterTask.ConverterSubTask

All Implemented Interfaces:

Task

Enclosing class:

HadoopConverterTask

public static class HadoopConverterTask.ConverterSubTask
extends HadoopTask

Field Summary

Fields inherited from class io.druid.indexing.common.task.HadoopTask

IS_DRUID_URL

Constructor Summary

Constructors

Constructor and Description
ConverterSubTask(List<DataSegment> segments, HadoopConverterTask parent, Map<String,Object> context)

Method Summary

Modifier and Type	Method and Description
HadoopConverterTask	getParent()
List<DataSegment>	getSegments()
String	getType() Returns a descriptive label for this task type.
boolean	isReady(TaskActionClient taskActionClient) Execute preflight actions for a task.
TaskStatus	run(TaskToolbox toolbox) Execute a task.

Methods inherited from class io.druid.indexing.common.task.HadoopTask

buildClassLoader, buildClassLoader, getHadoopDependencyCoordinates, invokeForeignLoader

Methods inherited from class io.druid.indexing.common.task.AbstractTask

canRestore, equals, getClasspathPrefix, getContext, getContextValue, getDataSource, getGroupId, getId, getNodeType, getQueryRunner, getTaskLocks, getTaskResource, hashCode, joinId, makeId, stopGracefully, success, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ConverterSubTask

public ConverterSubTask(List<DataSegment> segments,
                        HadoopConverterTask parent,
                        Map<String,Object> context)

Method Detail

getSegments

public List<DataSegment> getSegments()

getParent

public HadoopConverterTask getParent()

getType

public String getType()

Description copied from interface: Task

Returns a descriptive label for this task type. Used for metrics emission and logging.

Returns:

task type label

isReady

public boolean isReady(TaskActionClient taskActionClient)
                throws Exception

Description copied from interface: Task

Execute preflight actions for a task. This can be used to acquire locks, check preconditions, and so on. The actions must be idempotent, since this method may be executed multiple times. This typically runs on the coordinator. If this method throws an exception, the task should be considered a failure.

This method must be idempotent, as it may be run multiple times per task.

Parameters:

taskActionClient - action client for this task (not the full toolbox)

Returns:

true if ready, false if not ready yet

Throws:

Exception - if the task should be considered a failure

run

public TaskStatus run(TaskToolbox toolbox)
               throws Exception

Description copied from interface: Task

Execute a task. This typically runs on a worker as determined by a TaskRunner, and will be run while holding a lock on our dataSource and implicit lock interval (if any). If this method throws an exception, the task should be considered a failure.

Parameters:

toolbox - Toolbox for this task

Returns:

Some kind of finished status (isRunnable must be false).

Throws:

Exception - if this task failed