Package com.oracle.coherence.client

Class SingleValueStreamObserver<T>

java.lang.Object

com.oracle.coherence.client.SingleValueStreamObserver<T>

Type Parameters:

T - The type of objects received in this stream.

All Implemented Interfaces:

io.grpc.stub.StreamObserver<T>

public class SingleValueStreamObserver<T>
extends Object
implements io.grpc.stub.StreamObserver<T>

A simple StreamObserver adapter class that completes a CompletableFuture when the observer is completed.

This observer uses the value passed to its onNext(Object) method to complete the CompletableFuture.

This observer should only be used in cases where a single result is expected. If more that one call is made to onNext(Object) then future will be completed with an exception.

Since:

20.06

Author:

Jonathan Knight 2020.09.21

Constructor Summary

Constructors

Constructor	Description
SingleValueStreamObserver()	Create a SingleValueStreamObserver.

Method Summary

Modifier and Type	Method	Description
CompletionStage<T>	completionStage()	Obtain the CompletableFuture that will be completed when the StreamObserver completes.
void	onCompleted()
void	onError(Throwable t)
void	onNext(T value)

Methods inherited from class java.lang.Object

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

Constructor Detail

SingleValueStreamObserver

public SingleValueStreamObserver()

Create a SingleValueStreamObserver.

Method Detail

onNext

public void onNext(T value)

Specified by:

onNext in interface io.grpc.stub.StreamObserver<T>

onError

public void onError(Throwable t)

Specified by:

onError in interface io.grpc.stub.StreamObserver<T>

onCompleted

public void onCompleted()

Specified by:

onCompleted in interface io.grpc.stub.StreamObserver<T>

completionStage

public CompletionStage<T> completionStage()

Obtain the CompletableFuture that will be completed when the StreamObserver completes.

Returns:

The CompletableFuture