/*
* 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;
import org.apache.zeppelin.conf.ZeppelinConfiguration;
import org.apache.zeppelin.notebook.socket.Message;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Client to connect Zeppelin and ZeppelinHub via websocket API.
* Implemented using singleton pattern.
*
*/
public class Client {
private static final Logger LOG = LoggerFactory.getLogger(Client.class);
private final ZeppelinhubClient zeppelinhubClient;
private final ZeppelinClient zeppelinClient;
private static Client instance = null;
private static final int MB = 1048576;
private static final int MAXIMUM_NOTE_SIZE = 64 * MB;
public static Client initialize(String zeppelinUri, String zeppelinhubUri, String token,
ZeppelinConfiguration conf) {
if (instance == null) {
instance = new Client(zeppelinUri, zeppelinhubUri, token, conf);
}
return instance;
}
public static Client getInstance() {
return instance;
}
private Client(String zeppelinUri, String zeppelinhubUri, String token,
ZeppelinConfiguration conf) {
LOG.debug("Init Client");
zeppelinhubClient = ZeppelinhubClient.initialize(zeppelinhubUri, token);
zeppelinClient = ZeppelinClient.initialize(zeppelinUri, token, conf);
}
public void start() {
if (zeppelinhubClient != null) {
zeppelinhubClient.start();
}
if (zeppelinClient != null) {
zeppelinClient.start();
}
}
public void stop() {
if (zeppelinhubClient != null) {
zeppelinhubClient.stop();
}
if (zeppelinClient != null) {
zeppelinClient.stop();
}
}
public void relayToZeppelinHub(String message, String token) {
zeppelinhubClient.send(message, token);
}
public void relayToZeppelin(Message message, String noteId) {
zeppelinClient.send(message, noteId);
}
public static int getMaxNoteSize() {
return MAXIMUM_NOTE_SIZE;
}
}