javaspringjmsbandwidth-throttling

JMS message size

I'm currently working on bandwidth limiting feature (don't ask me why, its not my decision) for application which use JMS (Spring framework JMS and Active MQ namely) to sending messages with payload between server and clients.

I found lot of throttling methods to limit incoming JMS messages (but none of them based on actual bandwidth load), however I didn't find any possible way to limit outgoing message flow. So I decided to write Leaky bucket algorithm on my own.

Is there some way how to obtain size of JMS message? Other than 'sizeof' implementation in Java (In Java, what is the best way to determine the size of an object?)

Solution

  • Because JMS messages are serialized in sending process, the best way how to obtain size of message is through ObjectOutputStream.

    private int getMessageSizeInBytes(MessageWrapper message) throws IOException {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ObjectOutputStream oos = new ObjectOutputStream(baos);
    oos.writeObject(message);
    oos.close();
    return baos.size();
}