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Simple test to verify the usage of cls-hooked
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/* | |
* Copyright 2019 Adobe. All rights reserved. | |
* This file is licensed to you under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. You may obtain a copy | |
* of the License at http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software distributed under | |
* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS | |
* OF ANY KIND, either express or implied. See the License for the specific language | |
* governing permissions and limitations under the License. | |
*/ | |
// -------------------------- < helix-log >------------------------------------ | |
// this is the global logger from helix-log | |
const rootLogger = { | |
filter: (msg) => msg, | |
log: (msg) => console.log('root:', rootLogger.filter(msg)), | |
}; | |
// -------------------------- < openwhisk-logger >------------------------------------ | |
const { createNamespace } = require('cls-hooked'); | |
// test the root logger. since it was never modified, it should print the straight log message. | |
rootLogger.log('Hello from global'); | |
const CLS_NAMESPACE = createNamespace('my-namespace'); | |
// this is a message filter that appends the id from the session | |
function myFilter(msg) { | |
const id = CLS_NAMESPACE.get('id'); | |
return `[${id}] ${msg}`; | |
} | |
// initialized our special log filter. | |
function init() { | |
rootLogger.filter = myFilter; | |
} | |
// initializes logging and runs the action | |
async function wrap(fn, params) { | |
return CLS_NAMESPACE.runAndReturn(() => { | |
init(); | |
CLS_NAMESPACE.set('id', params.id); | |
return fn(params); | |
}); | |
} | |
// -------------------------- < my action >------------------------------------ | |
// this is my action code | |
async function run(params) { | |
rootLogger.log(`Hello from the action. sleeping for ${params.timeout}`); | |
await new Promise((resolve) => setTimeout(resolve, params.timeout)); | |
rootLogger.log('done.'); | |
} | |
// this is main action that would be exported to openwhisk | |
async function main(params) { | |
return wrap(run, params); | |
} | |
// -------------------------- < test >------------------------------------ | |
Promise.all([ | |
main({ id: 42, timeout: 1000 }), | |
main({ id: 31, timeout: 500 }), | |
]).then(); | |
// invoke the logger from outside of the continuation context | |
rootLogger.log('Hello from global again'); | |
/* | |
Prints: | |
root: Hello from global | |
root: [42] Hello from the action. sleeping for 1000 | |
root: [31] Hello from the action. sleeping for 500 | |
root: [undefined] Hello from global again | |
root: [31] done. | |
root: [42] done. | |
*/ |
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