/*
* Copyright 2015 Netflix, 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 io.reactivex.netty.events;
import java.util.concurrent.TimeUnit;
/**
* A listener to subscribe to events published by an {@link EventSource}
*/
public interface EventListener {
/**
* Marks the end of all event callbacks. No methods on this listener will ever be called once this method is called.
*/
void onCompleted();
/**
* Typically specific instances on {@link EventListener} will provide events that are fired by RxNetty, however,
* there may be cases, where a user would want to emit custom events. eg: Creating a custom protocol on top of an
* existing protocol like TCP, would perhaps require some additional events. In such a case, this callback can be
* utilized.
*
* @param event Event published.
*
* @see #onCustomEvent(Object, long, TimeUnit)
* @see #onCustomEvent(Object, Throwable)
* @see #onCustomEvent(Object, long, TimeUnit, Throwable)
*/
void onCustomEvent(Object event);
/**
* Typically specific instances on {@link EventListener} will provide events that are fired by RxNetty, however,
* there may be cases, where a user would want to emit custom events. eg: Creating a custom protocol on top of an
* existing protocol like TCP, would perhaps require some additional events. In such a case, this callback can be
* utilized.
*
* One should use this overload as opposed to {@link #onCustomEvent(Object)} if the custom event need not be created
* per invocation but has to be associated with a duration. This is a simple optimization to reduce event creation
* overhead.
*
* @param event Event published.
* @param duration Duration associated with this event. The semantics of this duration is totally upto the published
* event.
* @param timeUnit Timeunit for the duration.
*
* @see #onCustomEvent(Object, long, TimeUnit)
* @see #onCustomEvent(Object, Throwable)
* @see #onCustomEvent(Object, long, TimeUnit, Throwable)
*/
void onCustomEvent(Object event, long duration, TimeUnit timeUnit);
/**
* Typically specific instances on {@link EventListener} will provide events that are fired by RxNetty, however,
* there may be cases, where a user would want to emit custom events. eg: Creating a custom protocol on top of an
* existing protocol like TCP, would perhaps require some additional events. In such a case, this callback can be
* utilized.
*
* One should use this overload as opposed to {@link #onCustomEvent(Object)} if the custom event need not be created
* per invocation but has to be associated with an error. This is a simple optimization to reduce event creation
* overhead.
*
* @param event Event published.
*
* @see #onCustomEvent(Object, long, TimeUnit)
* @see #onCustomEvent(Object, Throwable)
* @see #onCustomEvent(Object, long, TimeUnit, Throwable)
*/
void onCustomEvent(Object event, Throwable throwable);
/**
* Typically specific instances on {@link EventListener} will provide events that are fired by RxNetty, however,
* there may be cases, where a user would want to emit custom events. eg: Creating a custom protocol on top of an
* existing protocol like TCP, would perhaps require some additional events. In such a case, this callback can be
* utilized.
*
* One should use this overload as opposed to {@link #onCustomEvent(Object)} if the custom event need not be created
* per invocation but has to be associated with a duration and an error. This is a simple optimization to reduce
* event creation overhead.
*
* @param event Event published.
* @param duration Duration associated with this event. The semantics of this duration is totally upto the published
* event.
* @param timeUnit Timeunit for the duration.
* @param throwable Error associated with the event.
*
* @see #onCustomEvent(Object, long, TimeUnit)
* @see #onCustomEvent(Object, Throwable)
* @see #onCustomEvent(Object, long, TimeUnit, Throwable)
*/
void onCustomEvent(Object event, long duration, TimeUnit timeUnit, Throwable throwable);
}