org.apache.flink.runtime.registration

Class RetryingRegistration<F extends Serializable,G extends RpcGateway,S extends RegistrationResponse.Success>

java.lang.Object

org.apache.flink.runtime.registration.RetryingRegistration<F,G,S>

Type Parameters:

F - The type of the fencing token

G - The type of the gateway to connect to.

S - The type of the successful registration responses.

public abstract class RetryingRegistration<F extends Serializable,G extends RpcGateway,S extends RegistrationResponse.Success>
extends Object

This utility class implements the basis of registering one component at another component, for example registering the TaskExecutor at the ResourceManager. This RetryingRegistration implements both the initial address resolution and the retries-with-backoff strategy.

The registration gives access to a future that is completed upon successful registration. The registration can be canceled, for example when the target where it tries to register at looses leader status.

Constructor Summary

Constructors

Constructor and Description
RetryingRegistration(org.slf4j.Logger log, RpcService rpcService, String targetName, Class<G> targetType, String targetAddress, F fencingToken, RetryingRegistrationConfiguration retryingRegistrationConfiguration)

Method Summary

Modifier and Type	Method and Description
void	cancel() Cancels the registration procedure.
CompletableFuture<org.apache.flink.api.java.tuple.Tuple2<G,S>>	getFuture()
protected abstract CompletableFuture<RegistrationResponse>	invokeRegistration(G gateway, F fencingToken, long timeoutMillis)
boolean	isCanceled() Checks if the registration was canceled.
void	startRegistration() This method resolves the target address to a callable gateway and starts the registration after that.

Methods inherited from class java.lang.Object

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

Constructor Detail

RetryingRegistration

public RetryingRegistration(org.slf4j.Logger log,
                            RpcService rpcService,
                            String targetName,
                            Class<G> targetType,
                            String targetAddress,
                            F fencingToken,
                            RetryingRegistrationConfiguration retryingRegistrationConfiguration)

Method Detail

getFuture

public CompletableFuture<org.apache.flink.api.java.tuple.Tuple2<G,S>> getFuture()

cancel

public void cancel()

Cancels the registration procedure.

isCanceled

public boolean isCanceled()

Checks if the registration was canceled.

Returns:

True if the registration was canceled, false otherwise.

invokeRegistration

protected abstract CompletableFuture<RegistrationResponse> invokeRegistration(G gateway,
                                                                              F fencingToken,
                                                                              long timeoutMillis)
                                                                       throws Exception

Throws:

Exception

startRegistration

public void startRegistration()

This method resolves the target address to a callable gateway and starts the registration after that.