com.netflix.conductor.client.task

Class WorkflowTaskCoordinator

java.lang.Object

com.netflix.conductor.client.task.WorkflowTaskCoordinator

public class WorkflowTaskCoordinator
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
WorkflowTaskCoordinator(com.netflix.discovery.EurekaClient ec, TaskClient client, int threadCount, java.lang.Iterable<Worker> taskWorkers)
WorkflowTaskCoordinator(com.netflix.discovery.EurekaClient ec, TaskClient client, int threadCount, Worker... taskWorkers)

Method Summary

Modifier and Type	Method and Description
void	init() Starts the polling
void	registerWorker(Worker worker)
WorkflowTaskCoordinator	withPollInterval(int pollInterval)
WorkflowTaskCoordinator	withSleepWhenRetry(int sleepWhenRetry)
WorkflowTaskCoordinator	withUpdateRetryCount(int updateRetryCount)
WorkflowTaskCoordinator	withWorkerQueueSize(int workerQueueSize)

Methods inherited from class java.lang.Object

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

Constructor Detail

WorkflowTaskCoordinator

public WorkflowTaskCoordinator(com.netflix.discovery.EurekaClient ec,
                               TaskClient client,
                               int threadCount,
                               Worker... taskWorkers)

Parameters:

ec - Eureka client - used to identify if the server is in discovery or not. When the server goes out of discovery, the polling is terminated. If passed null, discovery check is not done.

client - Task client used to communicate to conductor server.

threadCount - # of threads assigned to the workers. Should be at-least the size of taskWorkers to avoid starvation in a busy system.

taskWorkers - workers that will be used for polling work and task execution. Please see init() method. The method must be called after this constructor for the polling to start.

WorkflowTaskCoordinator

public WorkflowTaskCoordinator(com.netflix.discovery.EurekaClient ec,
                               TaskClient client,
                               int threadCount,
                               java.lang.Iterable<Worker> taskWorkers)

Parameters:

ec - Eureka client - used to identify if the server is in discovery or not. When the server goes out of discovery, the polling is terminated. If passed null, discovery check is not done.

client - TaskClient used to communicate to the conductor server

threadCount - # of threads assigned to the workers. Should be at-least the size of taskWorkers to avoid starvation in a busy system.

taskWorkers - workers that will be used for polling work and task execution. Please see init() method. The method must be called after this constructor for the polling to start.

Method Detail

withPollInterval

public WorkflowTaskCoordinator withPollInterval(int pollInterval)

Parameters:

pollInterval - polling interval in millisecond.

Returns:

Returns the current instance.

withSleepWhenRetry

public WorkflowTaskCoordinator withSleepWhenRetry(int sleepWhenRetry)

Parameters:

sleepWhenRetry - time in millisecond, for which the thread should sleep when task update call fails, before retrying the operation.

Returns:

Returns the current instance.

withUpdateRetryCount

public WorkflowTaskCoordinator withUpdateRetryCount(int updateRetryCount)

Parameters:

updateRetryCount - # of attempts to be made when updating task status when update status call fails.

Returns:

Returns the current instance.

See Also:

withSleepWhenRetry(int)

withWorkerQueueSize

public WorkflowTaskCoordinator withWorkerQueueSize(int workerQueueSize)

Parameters:

workerQueueSize - Worker queue size.

Returns:

Returns the current instance.

init

public void init()

Starts the polling

registerWorker

public void registerWorker(Worker worker)

Parameters:

worker - Adds a new worker. If you register a worker after doing init(), the no. of threads assigned to the poller will be less than the actual number of workers causing starvation.