/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.zeppelin.notebook.repo.zeppelinhub.websocket.scheduler;
import org.apache.zeppelin.notebook.repo.zeppelinhub.websocket.ZeppelinClient;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Routine that sends PING to all connected Zeppelin ws connections.
*
*/
public class ZeppelinHeartbeat implements Runnable {
private static final Logger LOG = LoggerFactory.getLogger(ZeppelinHubHeartbeat.class);
private ZeppelinClient client;
public static ZeppelinHeartbeat newInstance(ZeppelinClient client) {
return new ZeppelinHeartbeat(client);
}
private ZeppelinHeartbeat(ZeppelinClient client) {
this.client = client;
}
@Override
public void run() {
LOG.debug("Sending PING to Zeppelin Websocket Server");
client.ping();
}
}