Package io.littlehorse.sdk.worker

Class LHTaskWorker

java.lang.Object

io.littlehorse.sdk.worker.LHTaskWorker

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class LHTaskWorker
extends java.lang.Object
implements java.io.Closeable

The LHTaskWorker talks to the LH Servers and executes a specified Task Method every time a Task is scheduled.

Field Summary

Fields

Modifier and Type	Field	Description
static java.util.HashMap<java.lang.Class<?>,io.littlehorse.sdk.common.proto.VariableType>	javaTypeToLHType

Constructor Summary

Constructors

Constructor	Description
LHTaskWorker(java.lang.Object executable, java.lang.String taskDefName, LHConfig config)	Creates an LHTaskWorker given an Object that has an annotated LHTaskMethod, and a configuration Properties object.
LHTaskWorker(java.lang.Object executable, java.lang.String taskDefName, LHConfig config, io.littlehorse.sdk.worker.internal.LHServerConnectionManager manager)

Method Summary

Modifier and Type	Method	Description
void	close()	Cleanly shuts down the Task Worker.
boolean	doesTaskDefExist()	Checks if the TaskDef exists
java.lang.String	getTaskDefName()	`TaskDef` to execute
LHTaskWorkerHealth	healthStatus()
void	registerTaskDef()	Deploys the TaskDef object to the LH Server.
void	registerTaskDef(boolean swallowAlreadyExists)	Deploys the TaskDef object to the LH Server.
void	start()	Starts polling for and executing tasks.

Methods inherited from class java.lang.Object

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

Field Detail

javaTypeToLHType

public static java.util.HashMap<java.lang.Class<?>,io.littlehorse.sdk.common.proto.VariableType> javaTypeToLHType

Constructor Detail

LHTaskWorker

public LHTaskWorker(java.lang.Object executable,
                    java.lang.String taskDefName,
                    LHConfig config)
             throws java.io.IOException

Creates an LHTaskWorker given an Object that has an annotated LHTaskMethod, and a configuration Properties object.

Parameters:

executable - is any Object which has exactly one method annotated with '@LHTaskMethod'. That method will be used to execute the tasks.

taskDefName - is the name of the `TaskDef` to execute.

config - is a valid LHConfig.

Throws:

java.io.IOException

LHTaskWorker

public LHTaskWorker(java.lang.Object executable,
                    java.lang.String taskDefName,
                    LHConfig config,
                    io.littlehorse.sdk.worker.internal.LHServerConnectionManager manager)
             throws java.io.IOException

Throws:

java.io.IOException

Method Detail

getTaskDefName

public java.lang.String getTaskDefName()

`TaskDef` to execute

Returns:

the name of the `TaskDef` to execute

doesTaskDefExist

public boolean doesTaskDefExist()

Checks if the TaskDef exists

Returns:

true if the task is registered or false otherwise

registerTaskDef

public void registerTaskDef()

Deploys the TaskDef object to the LH Server. This is a convenience method, generally not recommended for production (in production you should manually use the PutTaskDef).

registerTaskDef

public void registerTaskDef(boolean swallowAlreadyExists)

Deploys the TaskDef object to the LH Server. This is a convenience method, generally not recommended for production (in production you should manually use the PutTaskDef).

Parameters:

swallowAlreadyExists - if true, then ignore grpc ALREADY_EXISTS error when registering the TaskDef.

start

public void start()
           throws java.io.IOException

Starts polling for and executing tasks.

Throws:

java.io.IOException - if unexpected error occurs opening connections.

close

public void close()

Cleanly shuts down the Task Worker.

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.io.Closeable

healthStatus

public LHTaskWorkerHealth healthStatus()