examples/javascript/messenger/server.js

#!/usr/bin/env node
/*
 * 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.
 *
 */

// Simple server for use with client.js illustrating request/response

// Check if the environment is Node.js and if not log an error and exit.
if (typeof process === 'object' && typeof require === 'function') {
    var proton = require("qpid-proton-messenger");

    var address = "amqp://~0.0.0.0";
    var message = new proton.Message();
    var reply   = new proton.Message();
    var messenger = new proton.Messenger();

    var dispatch = function(request, response) {
        var subject = request.getSubject();
        if (subject) {
            response.setSubject('Re: ' + subject);
        }
        response.properties = request.properties
        console.log("Dispatched " + subject + " " + JSON.stringify(request.properties));
    };

    var pumpData = function() {
        while (messenger.incoming()) {
            var t = messenger.get(message);
    
            var replyTo = message.getReplyTo();
            if (replyTo) {
                console.log(replyTo);
                reply.setAddress(replyTo);
                reply.setCorrelationID(message.getCorrelationID());
                reply.body = message.body;
                dispatch(message, reply);
                messenger.put(reply);
            }
    
            messenger.accept(t);
        }
    };

    var args = process.argv.slice(2);
    if (args.length > 0) {
        if (args[0] === '-h' || args[0] === '--help') {
            console.log("Usage: node server.js <addr> (default " + address + ")");
            process.exit(0);
        }
    
        address = args[0];
    }
    
    messenger.setIncomingWindow(1024);
    
    messenger.on('error', function(error) {console.log(error);});
    messenger.on('work', pumpData);
    messenger.recv(); // Receive as many messages as messenger can buffer.
    messenger.start();
    
    messenger.subscribe(address);
} else {
    console.error("server.js should be run in Node.js");
}