You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
47 lines
1.4 KiB
47 lines
1.4 KiB
'use strict';
|
|
|
|
var Cell = require('./cell'),
|
|
Pledge = require('./pledge');
|
|
|
|
var Pipeline = function(sessions) {
|
|
this._cells = sessions.map(function(session) { return new Cell(session) });
|
|
this._stopped = {incoming: false, outgoing: false};
|
|
};
|
|
|
|
Pipeline.prototype.processIncomingMessage = function(message, callback, context) {
|
|
if (this._stopped.incoming) return;
|
|
this._loop('incoming', this._cells.length - 1, -1, -1, message, callback, context);
|
|
};
|
|
|
|
Pipeline.prototype.processOutgoingMessage = function(message, callback, context) {
|
|
if (this._stopped.outgoing) return;
|
|
this._loop('outgoing', 0, this._cells.length, 1, message, callback, context);
|
|
};
|
|
|
|
Pipeline.prototype.close = function(callback, context) {
|
|
this._stopped = {incoming: true, outgoing: true};
|
|
|
|
var closed = this._cells.map(function(a) { return a.close() });
|
|
if (callback)
|
|
Pledge.all(closed).then(function() { callback.call(context) });
|
|
};
|
|
|
|
Pipeline.prototype._loop = function(direction, start, end, step, message, callback, context) {
|
|
var cells = this._cells,
|
|
n = cells.length,
|
|
self = this;
|
|
|
|
while (n--) cells[n].pending(direction);
|
|
|
|
var pipe = function(index, error, msg) {
|
|
if (index === end) return callback.call(context, error, msg);
|
|
|
|
cells[index][direction](error, msg, function(err, m) {
|
|
if (err) self._stopped[direction] = true;
|
|
pipe(index + step, err, m);
|
|
});
|
|
};
|
|
pipe(start, null, message);
|
|
};
|
|
|
|
module.exports = Pipeline;
|