/**
* The AMQPHelper class which provides mechanisms to publish, subscribe to
* queues and exchanges.
*
* @param {Object} config the configuration used to connect to an AMQP server
*/
function RpcHelper(config) {
_.extend(this, {
_config: config,
_clients: {},
_servers: {},
_rpc: amqpRpc.factory({url: buildRpcUrl(config)})
});
/**
* Build an RPC client with the specified namespace and
* specified remote method names
*
* @param {String} namespace the namespace of the remote service
* @param {String|String...} remoteMethods the remote methods which the client can call
*
* @return {RpcClient} an instance of an RPC client which can talk to an RPC service
*/
this.buildClient = _.partial(RpcClient.build, this._rpc);
this.buildService = _.partial(RpcService.build, this._rpc);
debug('Created RPC Helper');
}
MongoClient.connect("mongodb://" + config.database.host + ":" + config.ports.mongodb + "/" + config.database.name, function(err, dbConnection) {
if (err) {
aiota.log(path.basename(__filename), config.server, aiotaDB, err);
}
else {
db = dbConnection;
var cl = { group: "longpolling" };
var rpc = amqp.factory({ url: "amqp://" + config.amqp.login + ":" + config.amqp.password + "@" + config.amqp.host + ":" + config.amqp.port });
rpc.on(aiota.getQueue(cl), function(msg, callback) {
handleLongPollingRequest(msg, callback);
});
setInterval(function() { aiota.heartbeat(path.basename(__filename), config.server, aiotaDB); }, 10000);
process.on("SIGTERM", function() {
aiota.terminateProcess(path.basename(__filename), config.server, aiotaDB, function() {
process.exit(1);
});
});
}
});
/// <reference path="./amqp-rpc.d.ts" />
var amqp_rpc = require('amqp-rpc');
var rpc = amqp_rpc.factory();
rpc.on('inc', function (param, cb) {
var prevVal = param;
var nextVal = param + 2;
cb(++param, prevVal, nextVal);
});
rpc.on('say.*', function (param, cb, inf) {
var arr = inf.cmd.split('.');
var name = (param && param.name) ? param.name : 'world';
cb(arr[1] + ' ' + name + '!');
});
rpc.on('withoutCB', function (param, cb, inf) {
if (cb) {
cb('please run function without cb parameter');
}
else {
console.log('this is function withoutCB');
}
});
rpc.call('inc', 5, function (param1, param2, param3) {
console.log(param1, param2, param3);
});
rpc.call('say.Hello', { name: 'John' }, function (msg) {
console.log('results of say.Hello:', msg); //output: Hello John!
});
rpc.call('withoutCB', {}, function (msg) {
console.log('withoutCB results:', msg); //output: please run function without cb parameter
});
rpc.call('withoutCB', {}); //output message on server side console