node-app-client

node-app-client

Socket client for use with node-app-srv

Description

node-app-client is a socket client for use with node-app-srv. The JSON application socket service accepts connections from the client and allows interaction with a any number of custom node.js applications and/or databases.

Installation

npm install node-app-client

Usage

var appName = "test";
var appHost = "localhost";
var appPort = 10089;

var appClient = require('node-app-client').create(appName,appHost,appPort);

appClient.connect();

var userName = "admin";
var userPass = "admin";

function callback(response) {
	console.log("packet received: " + JSON.stringify(response));
}

/* authenticate client connection */
appClient.auth(callback,userName,userPass);

var db = "testdb";
var path = "path.to.object";

/* read a record from database */
appClient.read(callback,db,path);

Core methods

appClient.auth(callback,userName,userPass);
appClient.connect();
appClient.disconnect();

JSON-DB methods

/* record locking: see ./lib/defs.js for valid <lock> types */
appClient.lock(callback,db,path,lock);
appClient.read(callback,db,path);
appClient.write(callback,db,[{path:"path/to",key:"object",value:10},...]);
appClient.unlock(callback,db,path);

/* generic request: see ./lib/defs.js for valid <oper> types */
appClient.request(callback,db,oper,data)

/* clients subscribed to a path within an object receive an update of that object any time a change occurs */
appClient.subscribe(callback,db,path);
appClient.unsubscribe(callback,db,path);

JPath integration

node-jpath allows for xpath-style queries in a JSON environment.

Examples

/* return all path.to.property records where property == value */
appClient.read(callback,db,"path.to[property==value]");

/* return all records with child 'property' containing a child 'value' > 10 */
appClient.read(callback,db,"*.property[value>10]");

See node-jpath for more examples