92 lines
2.5 KiB
JavaScript
92 lines
2.5 KiB
JavaScript
/**
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* Dependencies.
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*/
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var assert = require('assert');
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var remoting = require('strong-remoting');
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var compat = require('../compat');
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var DataAccessObject = require('loopback-datasource-juggler/lib/dao');
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/**
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* Export the RemoteConnector class.
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*/
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module.exports = RemoteConnector;
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/**
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* Create an instance of the connector with the given `settings`.
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*/
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function RemoteConnector(settings) {
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assert(typeof settings === 'object', 'cannot initiaze RemoteConnector without a settings object');
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this.client = settings.client;
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this.adapter = settings.adapter || 'rest';
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this.protocol = settings.protocol || 'http'
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this.root = settings.root || '';
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this.host = settings.host || 'localhost';
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this.port = settings.port || 3000;
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this.remotes = remoting.create();
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// TODO(ritch) make sure this name works with Model.getSourceId()
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this.name = 'remote-connector';
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if(settings.url) {
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this.url = settings.url;
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} else {
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this.url = this.protocol + '://' + this.host + ':' + this.port + this.root;
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}
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// handle mixins in the define() method
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var DAO = this.DataAccessObject = function() {};
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}
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RemoteConnector.prototype.connect = function() {
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this.remotes.connect(this.url, this.adapter);
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}
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RemoteConnector.initialize = function(dataSource, callback) {
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var connector = dataSource.connector = new RemoteConnector(dataSource.settings);
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connector.connect();
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callback();
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}
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RemoteConnector.prototype.define = function(definition) {
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var Model = definition.model;
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var remotes = this.remotes;
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var SharedClass;
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assert(Model.sharedClass, 'cannot attach ' + Model.modelName
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+ ' to a remote connector without a Model.sharedClass');
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remotes.addClass(Model.sharedClass);
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Model
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.sharedClass
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.methods()
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.forEach(function(remoteMethod) {
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// TODO(ritch) more elegant way of ignoring a nested shared class
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if(remoteMethod.name !== 'Change'
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&& remoteMethod.name !== 'Checkpoint') {
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createProxyMethod(Model, remotes, remoteMethod);
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}
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});
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}
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function createProxyMethod(Model, remotes, remoteMethod) {
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var scope = remoteMethod.isStatic ? Model : Model.prototype;
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var original = scope[remoteMethod.name];
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scope[remoteMethod.name] = function remoteMethodProxy() {
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var args = Array.prototype.slice.call(arguments);
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var lastArgIsFunc = typeof args[args.length - 1] === 'function';
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var callback;
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if(lastArgIsFunc) {
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callback = args.pop();
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}
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remotes.invoke(remoteMethod.stringName, args, callback);
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}
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}
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function noop() {}
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