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

Class CompletedOperationCache<K extends OperationKey,R extends Serializable>

java.lang.Object

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

All Implemented Interfaces:

AutoCloseable, org.apache.flink.util.AutoCloseableAsync

@ThreadSafe
public class CompletedOperationCache<K extends OperationKey,R extends Serializable>
extends Object
implements org.apache.flink.util.AutoCloseableAsync

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

Constructor and Description
CompletedOperationCache(Duration cacheDuration)

Method Summary

Modifier and Type	Method and Description
CompletableFuture<Void>	closeAsync()
boolean	containsOperation(K operationKey) Returns whether this cache contains an operation under the given operation key.
Optional<OperationResult<R>>	get(K operationKey) Returns an optional containing the OperationResult for the specified key, or an empty optional if no operation is registered under the key.
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

Methods inherited from interface org.apache.flink.util.AutoCloseableAsync

close

Constructor Detail

CompletedOperationCache

public CompletedOperationCache(Duration cacheDuration)

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.

Throws:

IllegalStateException - if the cache is already shutting down

containsOperation

public boolean containsOperation(K operationKey)

Returns whether this cache contains an operation under the given operation key.

get

public Optional<OperationResult<R>> get(K operationKey)

Returns an optional containing the OperationResult for the specified key, or an empty optional if no operation is registered under the key.

closeAsync

public CompletableFuture<Void> closeAsync()

Specified by:

closeAsync in interface org.apache.flink.util.AutoCloseableAsync