org.apache.flink.runtime.rest.handler.async

Class AbstractAsynchronousOperationHandlers.CompletedOperationCache<K,R>

java.lang.Object

org.apache.flink.runtime.rest.handler.async.AbstractAsynchronousOperationHandlers.CompletedOperationCache<K,R>

Enclosing class:

AbstractAsynchronousOperationHandlers<K extends OperationKey,R>

@ThreadSafe
protected static class AbstractAsynchronousOperationHandlers.CompletedOperationCache<K,R>
extends Object

Cache to manage ongoing operations.

The cache allows to register ongoing operations by calling #registerOngoingOperation(K, CompletableFuture), where the CompletableFuture contains the operation result. Completed operations will be removed from the cache automatically after a fixed timeout.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	CompletedOperationCache()

Method Summary

Modifier and Type	Method and Description
org.apache.flink.types.Either<Throwable,R>	get(K operationKey) Returns the operation result or a Throwable if the CompletableFuture finished, otherwise null.
void	registerOngoingOperation(K operationKey, CompletableFuture<R> operationResultFuture) Registers an ongoing operation with the cache.

Methods inherited from class java.lang.Object

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

Constructor Detail

CompletedOperationCache

protected CompletedOperationCache()

Method Detail

registerOngoingOperation

public void registerOngoingOperation(K operationKey,
                                     CompletableFuture<R> operationResultFuture)

Registers an ongoing operation with the cache.

Parameters:

operationResultFuture - A future containing the operation result.

get

@Nullable
public org.apache.flink.types.Either<Throwable,R> get(K operationKey)
                                                         throws org.apache.flink.runtime.rest.handler.async.AbstractAsynchronousOperationHandlers.UnknownOperationKey

Returns the operation result or a Throwable if the CompletableFuture finished, otherwise null.

Throws:

UnknownOperationKey - If the operation is not found, and there is no ongoing operation under the provided key.

org.apache.flink.runtime.rest.handler.async.AbstractAsynchronousOperationHandlers.UnknownOperationKey