diffusion/src/node_modules/routing/topic-routing.js

Diffusion JavaScript client

var HeadersTunnel = require('v4-stack/headers-tunnel');
var Message = require('v4-stack/message');

var log = require('util/logger').create('V4 Client Routing');

module.exports = function TopicRouting(session, serviceAdapter, conversationSet, cache, registry) {
    this.route = function(message) {

        switch(message.type) {
            case Message.types.FETCH_REPLY:
                var cid = HeadersTunnel.cidFromHeaders(message.headers);
                conversationSet.respondIfPresent(cid, message);
                break;
            case Message.types.SERVICE_REQUEST:
            case Message.types.SERVICE_RESPONSE:
            case Message.types.SERVICE_ERROR:
                serviceAdapter.onMessage(message.type, message.getInputStream());
                break;
            case Message.types.TOPIC_VALUE:
                cache.handleValue(session, message.id, message.data, registry);
                break;
            case Message.types.TOPIC_DELTA:
                cache.handleDelta(session, message.id, message.data, registry);
                break;
            default:
                log.debug('Unhandled V4 message: ' + message.type, message);

        }
    };

    this.subscribe = function(info) {
        cache.handleSubscription(info, registry);
    };

    this.unsubscribe = function(id, reason) {
        cache.handleUnsubscription(id, reason, registry);
    };
};