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| author | Graeme Yeates <yeatesgraeme@gmail.com> | 2016-06-19 13:40:38 -0400 |
|---|---|---|
| committer | Graeme Yeates <yeatesgraeme@gmail.com> | 2016-06-19 13:40:38 -0400 |
| commit | 9e1c9a215d94dd84d6b5cccbabcbc4e1b37bf36f (patch) | |
| tree | 487752a71e2aacf464eb23cd2b5a749f892da370 /docs/file/lib/asyncify.js.html | |
| parent | dc4cac3dc9b5d15af7caca47e37cd6ee3b26ace0 (diff) | |
| download | async-9e1c9a215d94dd84d6b5cccbabcbc4e1b37bf36f.tar.gz | |
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diff --git a/docs/file/lib/asyncify.js.html b/docs/file/lib/asyncify.js.html new file mode 100644 index 0000000..8fb438e --- /dev/null +++ b/docs/file/lib/asyncify.js.html @@ -0,0 +1,189 @@ +<!DOCTYPE html> +<html> +<head> + <meta charset="utf-8"> + <base data-ice="baseUrl" href="../../"> + <title data-ice="title">lib/asyncify.js | API Document</title> + <link type="text/css" rel="stylesheet" href="css/style.css"> + <link type="text/css" rel="stylesheet" href="css/prettify-tomorrow.css"> + <script src="script/prettify/prettify.js"></script> + + + <script src="script/manual.js"></script> +</head> +<body class="layout-container" data-ice="rootContainer"> + +<header> + <a href="./">Home</a> + + <a href="identifiers.html">Reference</a> + <a href="source.html">Source</a> + + <a data-ice="repoURL" href="https://github.com/caolan/async.git" class="repo-url-github">Repository</a> + <div class="search-box"> + <span> + <img src="./image/search.png"> + <span class="search-input-edge"></span><input class="search-input"><span class="search-input-edge"></span> + </span> + <ul class="search-result"></ul> + </div> +</header> + +<nav class="navigation" data-ice="nav"><div> + <ul> + + <li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-asyncify">asyncify</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-auto">auto</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-autoInject">autoInject</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-cargo">cargo</a></span></span></li> +<li data-ice="doc"><span 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href="function/index.html#static-function-timeLimit">timeLimit</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-transform">transform</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-unmemoize">unmemoize</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-until">until</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-waterfall">waterfall</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-whilst">whilst</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-typedef">T</span><span data-ice="name"><span><a href="typedef/index.html#static-typedef-CargoObject">CargoObject</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-typedef">T</span><span data-ice="name"><span><a href="typedef/index.html#static-typedef-QueueObject">QueueObject</a></span></span></li> +<li data-ice="doc"><div data-ice="dirPath" class="nav-dir-path">internal</div><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-applyEach">applyEach</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-concat">concat</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-consoleFunc">consoleFunc</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-doLimit">doLimit</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-doParallel">doParallel</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-doParallelLimit">doParallelLimit</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-doSeries">doSeries</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-getIterator">getIterator</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-initialParams">initialParams</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-iterator">iterator</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-notId">notId</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-once">once</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-onlyOnce">onlyOnce</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-queue">queue</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-reject">reject</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-fallback">fallback</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-wrap">wrap</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-hasNextTick">hasNextTick</a></span></span></li> +<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-hasSetImmediate">hasSetImmediate</a></span></span></li> +</ul> +</div> +</nav> + +<div class="content" data-ice="content"><h1 data-ice="title">lib/asyncify.js</h1> +<pre class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">import isObject from 'lodash/isObject'; +import initialParams from './internal/initialParams'; + +/** + * Take a sync function and make it async, passing its return value to a + * callback. This is useful for plugging sync functions into a waterfall, + * series, or other async functions. Any arguments passed to the generated + * function will be passed to the wrapped function (except for the final + * callback argument). Errors thrown will be passed to the callback. + * + * If the function passed to `asyncify` returns a Promise, that promises's + * resolved/rejected state will be used to call the callback, rather than simply + * the synchronous return value. + * + * This also means you can asyncify ES2016 `async` functions. + * + * @name asyncify + * @static + * @memberOf async + * @alias wrapSync + * @category Util + * @param {Function} func - The synchronous function to convert to an + * asynchronous function. + * @returns {Function} An asynchronous wrapper of the `func`. To be invoked with + * (callback). + * @example + * + * // passing a regular synchronous function + * async.waterfall([ + * async.apply(fs.readFile, filename, "utf8"), + * async.asyncify(JSON.parse), + * function (data, next) { + * // data is the result of parsing the text. + * // If there was a parsing error, it would have been caught. + * } + * ], callback); + * + * // passing a function returning a promise + * async.waterfall([ + * async.apply(fs.readFile, filename, "utf8"), + * async.asyncify(function (contents) { + * return db.model.create(contents); + * }), + * function (model, next) { + * // `model` is the instantiated model object. + * // If there was an error, this function would be skipped. + * } + * ], callback); + * + * // es6 example + * var q = async.queue(async.asyncify(async function(file) { + * var intermediateStep = await processFile(file); + * return await somePromise(intermediateStep) + * })); + * + * q.push(files); + */ +export default function asyncify(func) { + return initialParams(function (args, callback) { + var result; + try { + result = func.apply(this, args); + } catch (e) { + return callback(e); + } + // if result is Promise object + if (isObject(result) && typeof result.then === 'function') { + result.then(function(value) { + callback(null, value); + })['catch'](function(err) { + callback(err.message ? err : new Error(err)); + }); + } else { + callback(null, result); + } + }); +} +</code></pre> + +</div> + +<footer class="footer"> + Generated by <a href="https://esdoc.org">ESDoc<span data-ice="esdocVersion">(0.4.7)</span></a> +</footer> + +<script src="script/search_index.js"></script> +<script src="script/search.js"></script> +<script src="script/pretty-print.js"></script> +<script src="script/inherited-summary.js"></script> +<script src="script/test-summary.js"></script> +<script src="script/inner-link.js"></script> +<script src="script/patch-for-local.js"></script> +</body> +</html> |