concern/lib/process/Child.js

A library for seperating your application logic into concerns.

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _child_process = require('child_process');

var _child_process2 = _interopRequireDefault(_child_process);

var _beof = require('beof');

var _beof2 = _interopRequireDefault(_beof);

var _bluebird = require('bluebird');

var _bluebird2 = _interopRequireDefault(_bluebird);

var _Signal = require('../state/Signal');

var _Signal2 = _interopRequireDefault(_Signal);

var _Address = require('../Address');

var _Address2 = _interopRequireDefault(_Address);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

/**
 * Child is the peer to use for running another System as a child process.
 * It will take care of forking the the child and transfering messages between the two
 * systems.
 * @param {string} path - The absolute path to the file to execute.
 * @implements {Peer}
 */
var Child = function () {
    function Child(path) {
        _classCallCheck(this, Child);

        (0, _beof2.default)({ path: path }).string();

        this._path = path;
        this._child = null;
    }

    _createClass(Child, [{
        key: 'unresolve',
        value: function unresolve(path) {

            var addr = _Address2.default.fromString(path);

            if (!addr.isRemote()) return path;

            return addr.uri.hash.split('#')[1];
        }
    }, {
        key: 'resolve',
        value: function resolve(path) {

            var addr = _Address2.default.fromString(path);

            if (addr.isRemote()) return path;

            return 'child://' + this._path + '#' + path;
        }
    }, {
        key: 'handles',
        value: function handles(address) {

            if (address.uri.protocol === 'child:') if (address.uri.pathname === this._path) return true;
        }
    }, {
        key: 'associate',
        value: function associate(remote) {
            var _this = this;

            this._monitor = remote;

            return _bluebird2.default.try(function () {
                _this._child = _child_process2.default.fork(_this._path);
                _this._child.on('message', function (message) {
                    return remote.message(message);
                });
                _this._child.on('error', function (e) {
                    return remote.error(e);
                });
                _this._child.on('exit', function (e) {
                    return remote.closed(_Signal2.default.Closed);
                });
            });
        }
    }, {
        key: 'send',
        value: function send(message) {
            var _this2 = this;

            _bluebird2.default.try(function () {
                return _this2._child.send(message);
            }).catch(function (e) {
                return _this2._monitor.error(e);
            });
        }
    }]);

    return Child;
}();

exports.default = Child;
module.exports = exports['default'];
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