pip-services3-commons-node
Version:
Portable abstractions and patterns for Pip.Services in Node.js
71 lines • 2.38 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
/** @module run */
/** @hidden */
var _ = require('lodash');
/** @hidden */
var async = require('async');
/**
* Helper class that executes components.
*
* [[IExecutable]]
*/
var Executor = /** @class */ (function () {
function Executor() {
}
/**
* Executes specific component.
*
* To be executed components must implement [[IExecutable]] interface.
* If they don't the call to this method has no effect.
*
* @param correlationId (optional) transaction id to trace execution through call chain.
* @param component the component that is to be executed.
* @param args execution arguments.
* @param callback callback function that receives execution result or error.
*
* @see [[IExecutable]]
* @see [[Parameters]]
*/
Executor.executeOne = function (correlationId, component, args, callback) {
if (_.isFunction(component.execute)) {
try {
return component.execute(correlationId, args, callback);
}
catch (err) {
callback(err, null);
}
}
else
callback(null, null);
};
/**
* Executes multiple components.
*
* To be executed components must implement [[IExecutable]] interface.
* If they don't the call to this method has no effect.
*
* @param correlationId (optional) transaction id to trace execution through call chain.
* @param components a list of components that are to be executed.
* @param args execution arguments.
* @param callback callback function that receives execution result or error.
*
* @see [[executeOne]]
* @see [[IExecutable]]
* @see [[Parameters]]
*/
Executor.execute = function (correlationId, components, args, callback) {
var results = [];
async.eachSeries(components, function (component, callback) {
Executor.executeOne(correlationId, component, args, function (err, result) {
results.push(result);
callback(err);
});
}, function (err) {
callback(err, results);
});
};
return Executor;
}());
exports.Executor = Executor;
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