/*
* 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
*
* 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.streams.monitoring.persist.impl;
import org.apache.streams.monitoring.persist.MessagePersister;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.net.SocketException;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.ByteBuffer;
import java.util.List;
public class LogstashUdpMessagePersister implements MessagePersister {
private static final Logger LOGGER = LoggerFactory.getLogger(LogstashUdpMessagePersister.class);
private String broadcastUri;
URI uri;
public LogstashUdpMessagePersister(String broadcastUri) {
this.broadcastUri = broadcastUri;
setup();
}
/**
* setup.
*/
public void setup() {
try {
uri = new URI(broadcastUri);
} catch (URISyntaxException ex) {
LOGGER.error(ex.getMessage());
}
}
@Override
/**
* Given a list of messages as Strings, broadcast them to the broadcastUri
* (if one is defined)
* @param messages
* @return int status code from POST response
*/
public int persistMessages(List<String> messages) {
int responseCode = -1;
if (broadcastUri != null) {
DatagramSocket socket = null;
try {
socket = new DatagramSocket();
} catch (SocketException ex) {
LOGGER.error("Metrics Broadcast Setup Failed: " + ex.getMessage());
}
try {
ByteBuffer toWrite = ByteBuffer.wrap(serializeMessages(messages).getBytes());
byte[] byteArray = toWrite.array();
DatagramPacket packet = new DatagramPacket(byteArray, byteArray.length);
socket.connect(new InetSocketAddress(uri.getHost(), uri.getPort()));
socket.send(packet);
} catch ( Exception ex ) {
LOGGER.error("Metrics Broadcast Failed: " + ex.getMessage());
} finally {
socket.close();
}
}
return responseCode;
}
/**
* Given a List of String messages, convert them to a JSON array.
* @param messages List of String messages
* @return Serialized version of this JSON array
*/
private String serializeMessages(List<String> messages) {
StringBuilder jsonLines = new StringBuilder();
for (String message : messages) {
jsonLines.append(message).append('\n');
}
return jsonLines.toString();
}
}