We now support Redis Streams to add, read and consume stream records. We introduced StreamOperations, BoundStreamOperations, and ReactiveStreamOperations to interact with Redis Streams using imperative and reactive programming models. Record represents items within a stream. There are various flavors of Stream Records:
* MapRecord (maps to the hash body used in stream messages).
* Binary MapRecord: byte[] and ByteBuffer variants of MapRecord.
* ObjectRecord: Simple and Complex Objects mapped onto the stream body hash using ObjectHashMapper.
Redis Streams are supported for the Lettuce client only as Jedis has not received yet Redis Stream support.
Messages can be created as Map or as object:
redisTemplate.opsForStream().add("my-stream", Collections.singletonMap("key", "value"));
redisTemplate.opsForStream().add(ObjectRecord.create("my-logins", new LoginEvent(…)));
Streams can be consumed by using a StreamMessageListenerContainer that allows for stream subscriptions or a StreamReceiver.
Synchronous Message Listener:
StreamMessageListenerContainer<String, MapRecord<String, String, String>> container = StreamMessageListenerContainer
.create(connectionFactory);
container.start();
Subscription subscription = container.receive(StreamOffset.fromStart("my-stream"), record -> … );
Reactive Message Receiver:
StreamReceiverOptions<String, ObjectRecord<String, LoginEvent>> receiverOptions = StreamReceiverOptions.builder()
.targetType(LoginEvent.class).build();
StreamReceiver<String, ObjectRecord<String, LoginEvent>> receiver = StreamReceiver.create(connectionFactory, receiverOptions);
Flux<ObjectRecord<String, LoginEvent>> messages = receiver.receive(StreamOffset.fromStart("my-logins"));
Original Pull Request: #356
65754623f6