reactor.bus.support.NotifyConsumer Maven / Gradle / Ivy
/*
* Copyright (c) 2011-2014 Pivotal Software, Inc.
*
* 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 reactor.bus.support;
import reactor.bus.Bus;
import reactor.bus.Event;
import reactor.bus.EventBus;
import reactor.core.support.Assert;
import reactor.fn.Consumer;
/**
* A {@code Consumer} that notifies an observable of each value that it has accepted.
*
* @param the type of the values that the consumer can accept
* @author Jon Brisbin
* @author Stephane Maldini
*/
public class NotifyConsumer implements Consumer {
private final Object notifyKey;
private final Bus observable;
private final boolean wrapEvent;
/**
* Creates a new {@code NotifyConsumer} that will notify the given {@code observable} using
* the given {@code notifyKey}. If {@code notifyKey} is {@code null}, {@code observable}
* will be notified without a key.
*
* @param notifyKey The notification key, may be {@code null}
* @param observable The observable to notify. May not be {@code null}
*/
public NotifyConsumer(Object notifyKey, Bus observable) {
Assert.notNull(observable, "Observable cannot be null.");
this.notifyKey = notifyKey;
this.observable = observable;
this.wrapEvent = EventBus.class.isAssignableFrom(observable.getClass());
}
@Override
@SuppressWarnings("unchecked")
public void accept(T t) {
observable.notify(notifyKey, (wrapEvent ? Event.wrap(t) : t));
}
}