io.vertx.core.eventbus.MessageProducer Maven / Gradle / Ivy
/*
* Copyright (c) 2011-2019 Contributors to the Eclipse Foundation
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
* which is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
*/
package io.vertx.core.eventbus;
import io.vertx.codegen.annotations.Fluent;
import io.vertx.codegen.annotations.VertxGen;
import io.vertx.core.AsyncResult;
import io.vertx.core.Future;
import io.vertx.core.Handler;
/**
* Represents a stream of message that can be written to.
*
*
* @author Julien Viet
*/
@VertxGen
public interface MessageProducer {
/**
* Update the delivery options of this producer.
*
* @param options the new options
* @return this producer object
*/
@Fluent
MessageProducer deliveryOptions(DeliveryOptions options);
/**
* @return The address to which the producer produces messages.
*/
String address();
/**
* Write a message to the event-bus, either sending or publishing.
*
* The {@code handler} completion depends on the producer type:
*
*
* - send or request: the handler is completed successfully if the message has been written; otherwise, the handler is failed
* - publish: the handler is failed if there is no recipient; otherwise, the handler is completed successfully
*
*
* In any case, a successfully completed {@code handler} is not a delivery guarantee.
*
* @param body the message body
*/
void write(T body, Handler> handler);
/**
* Like {@link #write(Object, Handler)} but returns a {@code Future} of the asynchronous result
*/
Future write(T body);
/**
* Closes the producer, this method should be called when the message producer is not used anymore.
*
* @return a future completed with the result
*/
Future close();
/**
* Same as {@link #close()} but with an {@code handler} called when the operation completes
*/
void close(Handler> handler);
}