/*
* 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 samples.userguide;
import javax.jms.*;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import java.util.Properties;
import java.io.*;
public class MDDProducer {
private static String getProperty(String name, String def) {
String result = System.getProperty(name);
if (result == null || result.length() == 0) {
result = def;
}
return result;
}
public static void main(String[] args) throws Exception {
String dest = getProperty("jms_dest", "dynamicQueues/JMSBinaryProxy");
String type = getProperty("jms_type", "binary");
String symbol = getProperty("symbol","MSFT");
String price = getProperty("price","100.20");
String market = getProperty("market","NYSE");
MDDProducer app = new MDDProducer();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(bos);
dos.writeDouble(getRandom(1,1,true));
dos.writeUTF(symbol);
dos.writeDouble(Double.valueOf(price));
dos.writeUTF(market);
dos.flush();
app.sendBytesMessage(dest,bos.toByteArray());
dos.close();
bos.close();
}
private void sendBytesMessage(String destName,byte[] buffer) throws Exception {
InitialContext ic = getInitialContext();
QueueConnectionFactory confac = (QueueConnectionFactory) ic.lookup("ConnectionFactory");
QueueConnection connection = confac.createQueueConnection();
QueueSession session = connection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
BytesMessage bm = session.createBytesMessage();
bm.writeBytes(buffer);
QueueSender sender = session.createSender((Queue)ic.lookup(destName));
sender.send(bm);
sender.close();
session.close();
connection.close();
}
private InitialContext getInitialContext() throws NamingException {
Properties env = new Properties();
if (System.getProperty("java.naming.provider.url") == null) {
env.put("java.naming.provider.url", "tcp://localhost:61616");
}
if (System.getProperty("java.naming.factory.initial") == null) {
env.put("java.naming.factory.initial",
"org.apache.activemq.jndi.ActiveMQInitialContextFactory");
}
return new InitialContext(env);
}
private static double getRandom(double base, double varience, boolean onlypositive) {
double rand = Math.random();
return (base + ((rand > 0.5 ? 1 : -1) * varience * base * rand))
* (onlypositive ? 1 : (rand > 0.5 ? 1 : -1));
}
private static byte[] intToByteArray(int value) {
return new byte[] {
(byte)(value >>> 24),
(byte)(value >>> 16),
(byte)(value >>> 8),
(byte)value};
}
}