after-operation v1.0.3
after-operation
Helper for converting Google Compute Engine tm operation event-emitters to Promises
Deprecation Notice
Oct. 2019: Since GCE operations support operation.promise()
you should probably use that instead.
Installation
npm i after-operation -S
Initialization
const after = require('after-operation');
Usage
Promise to return a value after an operation completes:
// some @google-cloud/compute method returns an operation
after(operation, onSuccessValue)
.then( (v)=>(assert.equal(v, onSuccessValue)) )
.catch(logTheOperationErrors)
Promise to call a function after the operation completes:
after(operation, (meta)=>(meta) )
.then(doSomethingUseful)
.catch(logTheOperationErrors)
Note that the success function gets fed with the metadata emitted in the operation 'complete' event.
By using the identity function as the success function, the promise will resolve to that metadata.
Note: after-operation will remove all operation listeners on either operation complete or operation error.
Related modules by other authors
npm: event-to-promise might be useful with other eventEmitters.
Copyright
2017 Paul Brewer - Economic and Financial Technology Consulting LLC drpaulbrewer@eaftc.com
License
The MIT License
Trademarks
Google Compute Engine tm is a trademark of Google, Inc.
This software is not a product of Google, Inc.