String DATA = "abcdefghijklmnopqrstuvwxyz";
String body = "";
for( int i=0; i < size; i ++) {
body += DATA.charAt(i%DATA.length());
}
Buffer msg = new AsciiBuffer(body);
MQTT mqtt = new MQTT();
mqtt.setHost(host, port);
mqtt.setUserName(user);
mqtt.setPassword(password);
FutureConnection connection = mqtt.futureConnection();
connection.connect().await();
final LinkedList<Future<Void>> queue = new LinkedList<Future<Void>>();
UTF8Buffer topic = new UTF8Buffer(destination);
for( int i=1; i <= messages; i ++) {
// Send the publish without waiting for it to complete. This allows us
// to send multiple message without blocking..
queue.add(connection.publish(topic, msg, QoS.AT_LEAST_ONCE, false));
// Eventually we start waiting for old publish futures to complete
// so that we don't create a large in memory buffer of outgoing message.s
if( queue.size() >= 1000 ) {
queue.removeFirst().await();
}
if( i % 1000 == 0 ) {
System.out.println(String.format("Sent %d messages.", i));
}
}
queue.add(connection.publish(topic, new AsciiBuffer("SHUTDOWN"), QoS.AT_LEAST_ONCE, false));
while( !queue.isEmpty() ) {
queue.removeFirst().await();
}
connection.disconnect().await();