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/*-
* ============LICENSE_START=======================================================
* Simulator
* ================================================================================
* Copyright (C) 2019 Nokia. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.netconfsimulator.websocket;
import java.util.Optional;
import javax.websocket.CloseReason;
import javax.websocket.Endpoint;
import javax.websocket.EndpointConfig;
import javax.websocket.RemoteEndpoint;
import javax.websocket.Session;
import org.onap.netconfsimulator.kafka.listener.KafkaListenerEntry;
import org.onap.netconfsimulator.kafka.listener.KafkaListenerHandler;
import org.onap.netconfsimulator.websocket.message.NetconfMessageListener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.listener.AbstractMessageListenerContainer;
import org.springframework.kafka.listener.MessageListener;
import org.springframework.stereotype.Component;
//instance of this class is created every each websocket request
@Component
class NetconfEndpoint extends Endpoint {
private static final Logger LOGGER = LoggerFactory.getLogger(NetconfEndpoint.class);
private static final String TOPIC_NAME = "config";
private KafkaListenerHandler kafkaListenerHandler;
public Optional<KafkaListenerEntry> getEntry() {
return entry;
}
public void setEntry(Optional<KafkaListenerEntry> entry) {
this.entry = entry;
}
private Optional<KafkaListenerEntry> entry = Optional.empty();
@Autowired
NetconfEndpoint(KafkaListenerHandler listenerHandler) {
this.kafkaListenerHandler = listenerHandler;
}
@Override
public void onOpen(Session session, EndpointConfig endpointConfig) {
RemoteEndpoint.Basic basicRemote = session.getBasicRemote();
addKafkaListener(basicRemote);
entry.ifPresent(x -> LOGGER.info("Session with client: {} established", x.getClientId()));
}
@Override
public void onError(Session session, Throwable throwable) {
LOGGER.error("Unexpected error occurred", throwable);
}
@Override
public void onClose(Session session, CloseReason closeReason) {
entry.ifPresent(x -> x.getListenerContainer().stop());
entry.ifPresent(x -> LOGGER.info("Closing connection for client: {}", x.getClientId()));
}
private void addKafkaListener(RemoteEndpoint.Basic remoteEndpoint) {
MessageListener<String, String> messageListener = new NetconfMessageListener(remoteEndpoint);
KafkaListenerEntry kafkaListener = kafkaListenerHandler.createKafkaListener(messageListener, TOPIC_NAME);
AbstractMessageListenerContainer<String,String> listenerContainer = kafkaListener.getListenerContainer();
listenerContainer.start();
entry = Optional.of(kafkaListener);
}
}
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