org.apache.flink.statefun.sdk

Class AsyncOperationResult<M,T>

java.lang.Object

org.apache.flink.statefun.sdk.AsyncOperationResult<M,T>

Type Parameters:

M - metadata type

T - result type.

public final class AsyncOperationResult<M,T>
extends java.lang.Object

AsyncOperationResult - An asynchronous operation result.

AsyncOperationResult represents a completion of an asynchronous operation, registered by a stateful function instance via a Context.registerAsyncOperation(Object, CompletableFuture).

The status of the asynchronous operation can be obtain via status(), and it can be one of:

• success - The asynchronous operation has succeeded, and the produced result can be obtained via value().
• failure - The asynchronous operation has failed, and the cause can be obtained via (throwable().
• unknown - the stateful function was restarted, possibly on a different machine, before the CompletableFuture was completed, therefore it is unknown what is the status of the asynchronous operation.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AsyncOperationResult.Status

Constructor Summary

Constructors

Constructor and Description
AsyncOperationResult(M metadata, AsyncOperationResult.Status status, T value, java.lang.Throwable throwable)

Method Summary

Modifier and Type	Method and Description
boolean	failure()
M	metadata()
AsyncOperationResult.Status	status()
boolean	successful()
java.lang.Throwable	throwable()
boolean	unknown()
T	value()

Methods inherited from class java.lang.Object

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

Constructor Detail

AsyncOperationResult

@ForRuntime
public AsyncOperationResult(M metadata,
                                        AsyncOperationResult.Status status,
                                        T value,
                                        java.lang.Throwable throwable)

Method Detail

metadata

public M metadata()

Returns:

the metadata assosicted with this async operation, as supplied at Context.registerAsyncOperation(Object, CompletableFuture).

status

public AsyncOperationResult.Status status()

Returns:

the status of this async operation.

value

public T value()

Returns:

the successfully completed value.

throwable

public java.lang.Throwable throwable()

Returns:

the exception thrown during an attempt to complete the asynchronous operation.

successful

public boolean successful()

unknown

public boolean unknown()

failure

public boolean failure()