grpc.cache_client.pubsub

Class PubsubGrpc.PubsubImplBase

java.lang.Object

grpc.cache_client.pubsub.PubsubGrpc.PubsubImplBase

All Implemented Interfaces:

io.grpc.BindableService

Enclosing class:

PubsubGrpc

public abstract static class PubsubGrpc.PubsubImplBase
extends java.lang.Object
implements io.grpc.BindableService

 For working with topics in a cache.
 Momento topics are conceptually located on a cache. They are best-effort multicast.
 To use them, create a cache then start subscribing and publishing!
 Momento topic subscriptions try to give you information about the quality of the
   stream you are receiving. For example, you might miss messages if your network
   is slow, or if some intermediate switch fails, or due to rate limiting. It is
   also possible, though we try to avoid it, that messages could briefly come out
   of order between subscribers.
   We try to tell you when things like this happen via a Discontinuity in your
   subscription stream. If you do not care about occasional discontinuities then
   don't bother handling them! You might still want to log them just in case ;-)
 

Constructor Summary

Constructors

Constructor and Description
PubsubImplBase()

Method Summary

Modifier and Type	Method and Description
io.grpc.ServerServiceDefinition	bindService()
void	publish(_PublishRequest request, io.grpc.stub.StreamObserver<_Empty> responseObserver) Publish a message to a topic.
void	subscribe(_SubscriptionRequest request, io.grpc.stub.StreamObserver<_SubscriptionItem> responseObserver) Subscribe to notifications from a topic.

Methods inherited from class java.lang.Object

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

Constructor Detail

PubsubImplBase

public PubsubImplBase()

Method Detail

publish

public void publish(_PublishRequest request,
                    io.grpc.stub.StreamObserver<_Empty> responseObserver)

 Publish a message to a topic.
 If a topic has no subscribers, then the effect of Publish MAY be either of:
 * It is dropped and the topic is nonexistent.
 * It is accepted to the topic as the next message.
 Publish() does not wait for subscribers to accept. It returns Ok upon accepting
 the topic value. It also returns Ok if there are no subscribers and the value
 happens to be dropped. Publish() can not guarantee delivery in theory but in
 practice it should almost always deliver to subscribers.
 REQUIRES HEADER authorization: Momento auth token
 

subscribe

public void subscribe(_SubscriptionRequest request,
                      io.grpc.stub.StreamObserver<_SubscriptionItem> responseObserver)

 Subscribe to notifications from a topic.
 You will receive a stream of values and (hopefully occasional) discontinuities.
 Values will appear as copies of the payloads you Publish() to the topic.
 REQUIRES HEADER authorization: Momento auth token
 

bindService

public final io.grpc.ServerServiceDefinition bindService()

Specified by:

bindService in interface io.grpc.BindableService