blob: 089443692e63fbefe0e166cb6e8b81ec521925ec [file] [log] [blame]
// Copyright (C) 2019 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.gerritforge.gerrit.eventbroker;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.gerrit.server.events.Event;
import java.util.Set;
import java.util.function.Consumer;
/** API for sending/receiving events through a message Broker. */
public interface BrokerApi {
/**
* Send a message to a topic.
*
* @param topic topic name
* @param message to be send to the topic
* @return a future that returns when the message has been sent.
*/
ListenableFuture<Boolean> send(String topic, Event message);
/**
* Receive asynchronously a message from a topic.
*
* @param topic topic name
* @param consumer an operation that accepts and process a single message
*/
void receiveAsync(String topic, Consumer<Event> consumer);
/**
* Get the active subscribers
*
* @return {@link Set} of the topics subscribers
*/
Set<TopicSubscriber> topicSubscribers();
/** Disconnect from broker and cancel all active consumers */
void disconnect();
/**
* Redeliver all stored messages for specified topic
*
* @param topic topic name
*/
void replayAllEvents(String topic);
}