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/*
* Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.netconf.sal.streams.listeners;
import com.google.common.eventbus.Subscribe;
import io.netty.channel.Channel;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
class EventBusChangeRecorder<T extends BaseListenerInterface> {
private static final Logger LOG = LoggerFactory.getLogger(EventBusChangeRecorder.class);
private final T listener;
/**
* Event bus change recorder of specific listener of notifications.
*
* @param listener
* specific listener
*/
EventBusChangeRecorder(final T listener) {
this.listener = listener;
}
@Subscribe
public void recordCustomerChange(final Event event) {
if (event.getType() == EventType.REGISTER) {
final Channel subscriber = event.getSubscriber();
if (!this.listener.getSubscribers().contains(subscriber)) {
this.listener.getSubscribers().add(subscriber);
}
} else if (event.getType() == EventType.DEREGISTER) {
this.listener.getSubscribers().remove(event.getSubscriber());
Notificator.removeListenerIfNoSubscriberExists(this.listener);
} else if (event.getType() == EventType.NOTIFY) {
for (final Channel subscriber : this.listener.getSubscribers()) {
if (subscriber.isActive()) {
LOG.debug("Data are sent to subscriber {}:", subscriber.remoteAddress());
subscriber.writeAndFlush(new TextWebSocketFrame(event.getData()));
} else {
LOG.debug("Subscriber {} is removed - channel is not active yet.", subscriber.remoteAddress());
this.listener.getSubscribers().remove(subscriber);
}
}
}
}
}
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