5.1. Basic Message Passing

It is easy to perform message passing in space-based programming by passing an entry from one process to another. To do so, we first need a message to pass. Let's begin by defining a Message entry with two fields: one that identifies the receiver, and another that holds the content of the message:

public class Message implements Entry {
  public String receiver;
  public String content;

  public Message() {
  }
}

To send a message, a process creates a Message entry and writes it into a space:

Message msg = new Message();
msg.receiver = "duke@sun.com";
msg.content = "Hello";

space.write(msg, null, Lease.FOREVER);

You'll note that we've used the string “duke@sun.com” as a way to identify the receiver, but any agreed-upon ...

Get JavaSpaces™ Principles, Patterns, and Practice now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial