Package io.grpc.stub

Class ServerCalls.NoopStreamObserver<V>

java.lang.Object

io.grpc.stub.ServerCalls.NoopStreamObserver<V>

All Implemented Interfaces:

StreamObserver<V>

Enclosing class:

ServerCalls

static class ServerCalls.NoopStreamObserver<V>
extends java.lang.Object
implements StreamObserver<V>

No-op implementation of StreamObserver. Used in abstract stubs for default implementations of methods which throws UNIMPLEMENTED error and tests.

Constructor Summary

Constructors

Constructor	Description
NoopStreamObserver()

Method Summary

Modifier and Type	Method	Description
void	onCompleted()	Receives a notification of successful stream completion.
void	onError(java.lang.Throwable t)	Receives a terminating error from the stream.
void	onNext(V value)	Receives a value from the stream.

Methods inherited from class java.lang.Object

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

Constructor Detail

NoopStreamObserver

NoopStreamObserver()

Method Detail

onNext

public void onNext(V value)

Description copied from interface: StreamObserver

Receives a value from the stream.

Can be called many times but is never called after StreamObserver.onError(Throwable) or StreamObserver.onCompleted() are called.

Unary calls must invoke onNext at most once. Clients may invoke onNext at most once for server streaming calls, but may receive many onNext callbacks. Servers may invoke onNext at most once for client streaming calls, but may receive many onNext callbacks.

If an exception is thrown by an implementation the caller is expected to terminate the stream by calling StreamObserver.onError(Throwable) with the caught exception prior to propagating it.

Specified by:

onNext in interface StreamObserver<V>

Parameters:

value - the value passed to the stream

onError

public void onError(java.lang.Throwable t)

Description copied from interface: StreamObserver

Receives a terminating error from the stream.

May only be called once and if called it must be the last method called. In particular if an exception is thrown by an implementation of onError no further calls to any method are allowed.

t should be a StatusException or StatusRuntimeException, but other Throwable types are possible. Callers should generally convert from a Status via Status.asException() or Status.asRuntimeException(). Implementations should generally convert to a Status via Status.fromThrowable(Throwable).

Specified by:

onError in interface StreamObserver<V>

Parameters:

t - the error occurred on the stream

onCompleted

public void onCompleted()

Description copied from interface: StreamObserver

Receives a notification of successful stream completion.

May only be called once and if called it must be the last method called. In particular if an exception is thrown by an implementation of onCompleted no further calls to any method are allowed.

Specified by:

onCompleted in interface StreamObserver<V>