程序包 org.apache.pulsar.functions.worker

类 FunctionAssignmentTailer

java.lang.Object

org.apache.pulsar.functions.worker.FunctionAssignmentTailer

所有已实现的接口:

AutoCloseable

public class FunctionAssignmentTailer
extends Object
implements AutoCloseable

This class is responsible for reading assignments from the 'assignments' functions internal topic. Only functions worker leader writes to the topic while other workers read from the topic. When a worker become a leader, the worker will read to the end of the assignments topic and close its reader to the topic. Then the worker and new leader will be in charge of computing new assignments when necessary. The leader does not need to listen to the assignments topic because it can just update its in memory assignments map directly after it computes a new scheduling. When a worker loses leadership, the worker is start reading from the assignments topic again.

构造器概要

构造器

构造器	说明
FunctionAssignmentTailer(FunctionRuntimeManager functionRuntimeManager, org.apache.pulsar.client.api.ReaderBuilder readerBuilder, WorkerConfig workerConfig, ErrorNotifier errorNotifier)

方法概要

修饰符和类型	方法	说明
void	close()
void	start()
void	startFromMessage(org.apache.pulsar.client.api.MessageId startMessageId)
CompletableFuture<Void>	triggerReadToTheEndAndExit()

从类继承的方法 java.lang.Object

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

构造器详细资料

FunctionAssignmentTailer

public FunctionAssignmentTailer(FunctionRuntimeManager functionRuntimeManager,
 org.apache.pulsar.client.api.ReaderBuilder readerBuilder,
 WorkerConfig workerConfig,
 ErrorNotifier errorNotifier)

方法详细资料

triggerReadToTheEndAndExit

public CompletableFuture<Void> triggerReadToTheEndAndExit()

startFromMessage

public void startFromMessage(org.apache.pulsar.client.api.MessageId startMessageId)
                      throws org.apache.pulsar.client.api.PulsarClientException

抛出:

org.apache.pulsar.client.api.PulsarClientException

start

public void start()
           throws org.apache.pulsar.client.api.PulsarClientException

抛出:

org.apache.pulsar.client.api.PulsarClientException

close

public void close()

指定者:

close 在接口中 AutoCloseable