pip-services3-commons-node
Version:
Portable abstractions and patterns for Pip.Services in Node.js
63 lines (60 loc) • 1.9 kB
text/typescript
/** @module run */
/** @hidden */
let _ = require('lodash');
/** @hidden */
let async = require('async');
/**
* Helper class that closes previously opened components.
*
* [[IClosable]]
*/
export class Closer {
/**
* Closes specific component.
*
* To be closed components must implement [[ICloseable]] 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 closed.
* @param callback callback function that receives error or null no errors occured.
*
* @see [[IClosable]]
*/
public static closeOne(correlationId: string, component: any, callback?: (err: any) => void): void {
if (_.isFunction(component.close)) {
try {
component.close(correlationId, callback);
} catch (err) {
if (callback) callback(err);
else throw err;
}
} else if (callback)
callback(null);
}
/**
* Closes multiple components.
*
* To be closed components must implement [[ICloseable]] 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 the list of components that are to be closed.
* @param callback callback function that receives error or null no errors occured.
*
* @see [[closeOne]]
* @see [[IClosable]]
*/
public static close(correlationId: string, components: any[], callback?: (err: any) => void): void {
async.eachSeries(
components,
(component, callback) => {
Closer.closeOne(correlationId, component, callback);
},
(err) => {
if (callback) callback(err);
else if (err) throw err;
}
);
}
}