diff options
author | Florian Dold <florian.dold@gmail.com> | 2017-05-03 15:35:00 +0200 |
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committer | Florian Dold <florian.dold@gmail.com> | 2017-05-03 15:35:00 +0200 |
commit | de98e0b232509d5f40c135d540a70e415272ff85 (patch) | |
tree | a79222a5b58484ab3b80d18efcaaa7ccc4769b33 /node_modules/async/forever.js | |
parent | e0c9d480a73fa629c1e4a47d3e721f1d2d345406 (diff) |
node_modules
Diffstat (limited to 'node_modules/async/forever.js')
-rw-r--r-- | node_modules/async/forever.js | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/node_modules/async/forever.js b/node_modules/async/forever.js new file mode 100644 index 000000000..6c7b8a4cd --- /dev/null +++ b/node_modules/async/forever.js @@ -0,0 +1,65 @@ +'use strict'; + +Object.defineProperty(exports, "__esModule", { + value: true +}); +exports.default = forever; + +var _noop = require('lodash/noop'); + +var _noop2 = _interopRequireDefault(_noop); + +var _onlyOnce = require('./internal/onlyOnce'); + +var _onlyOnce2 = _interopRequireDefault(_onlyOnce); + +var _ensureAsync = require('./ensureAsync'); + +var _ensureAsync2 = _interopRequireDefault(_ensureAsync); + +var _wrapAsync = require('./internal/wrapAsync'); + +var _wrapAsync2 = _interopRequireDefault(_wrapAsync); + +function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + +/** + * Calls the asynchronous function `fn` with a callback parameter that allows it + * to call itself again, in series, indefinitely. + + * If an error is passed to the callback then `errback` is called with the + * error, and execution stops, otherwise it will never be called. + * + * @name forever + * @static + * @memberOf module:ControlFlow + * @method + * @category Control Flow + * @param {AsyncFunction} fn - an async function to call repeatedly. + * Invoked with (next). + * @param {Function} [errback] - when `fn` passes an error to it's callback, + * this function will be called, and execution stops. Invoked with (err). + * @example + * + * async.forever( + * function(next) { + * // next is suitable for passing to things that need a callback(err [, whatever]); + * // it will result in this function being called again. + * }, + * function(err) { + * // if next is called with a value in its first parameter, it will appear + * // in here as 'err', and execution will stop. + * } + * ); + */ +function forever(fn, errback) { + var done = (0, _onlyOnce2.default)(errback || _noop2.default); + var task = (0, _wrapAsync2.default)((0, _ensureAsync2.default)(fn)); + + function next(err) { + if (err) return done(err); + task(next); + } + next(); +} +module.exports = exports['default'];
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