Constellation hub access from a Nodejs context
[Constellation] is a platform to orchestrate and interconnect your programs and devices. With constellation, you can easily manage all of your devices / sensors / switch and more, interconnect its and create intelligence between them. You can read more on [Constellation] here : http://www.myconstellation.io/
This package was created, at the beginning on my needs to access Constellation Hub from my NodeJS home context. The lack of reverse engineering on the Signal R javascript library is backed up with a DOM parallel context created with [JsDOM].
Any performances problem are noticed when I perftest it.
Don't hesitate to ask for an add, or just contribute.
- 2.0.0 now manage virtual entities (Sentinel and packages).
- Now you can push state object and emulate Sentinel from a Javascript Context.
- You can use the old initialization style 1.2.x with this 2.0.0
Install in your app directory
$ npm install constellation-nodejsCreate configuration file in config directory from the sample attached
Create a default.json file in /config directory. Configuration file isn't necessary. You can instanciate the Hub from parameters.
{
/**
* Constellation Configuration
**/
"constellation": {
//// Constellation url
"url" : "",
//// Constellation Hub Access key
"accessKey" : "",
//// Your application name
"applicationName" : "Test Node JS",
///// Sdk Version
"sdkVersion" : "1.8.2"
}
}Config file is automaticaly checked before any initialization, if you don't provide parameters to init() method. The config process is managed by the fantastic library [node-config]. You can manage your multiples environments with it.
Access to the Constellation Hub context
var ConstellationHub = require('constellation-nodejs');
//// With config file
var c = new ConstellationHub();
//// Without configuration file
var c = new ConstellationHub(rootUrl, token, "AmbientSensor", "1.8.2"); //// AmbientSensor represents the name of the application (package)
//// Create a Controller Hub
c.Controller()
.then((ctx) => {
ctx.on('connected', () => {
console.log("CONNECTED");
//ctx.hub.server.writelog("SentinelPI", "{ 'test' : 'ok' } ");
});
return ctx.connect();
});
//// Create a Consumer Hub
c.Consumer()
.then((ctx) => {
ctx.on('connected', () => {
console.log("CONNECTED");
//// subscribe
ctx.hub.client.registerStateObjectLink("R2D2", "Vera", "Flood Sensor (temperature)", "*", function (so) {
console.log(so.Value.Temperature);
});
});
return ctx.connect();
});
//// Create a Sentinel Hub
c.Sentinel("Corulag")
.then((ctx) => {
ctx.on('connected', () => {
console.log("CONNECTED");
ctx.hub.server.writelog("SentinelPI", "{ 'test' : 'ok' } ");
});
return ctx.connect();
});Now it's on https://github.com/myconstellation/constellation-nodejs