I'm attempting to store an ID in continuation-local-storage so I can output it in the logs after a successful gRPC request. I create the namespace at the start of the app then set the ID in middleware (in the full implementation the ID will come in in the request). I then attempt to get the ID in a get('/'). Getting the ID works but I'm then unable to get it inside the gRPC request:
app.js
const cls = require('continuation-local-storage');
cls.createNamespace("THING");
var express = require('express');
var path = require('path');
var index = require('./routes/index');
var app = express();
const storeRequestId = (req, res, next) => {
const ns = cls.getNamespace("THING");
ns.run(() => {
ns.set('thing-id', '123');
next();
});
}
app.use(storeRequestId);
app.use('/', index);
module.exports = app;
index.js
const cls = require('continuation-local-storage');
var express = require('express');
var router = express.Router();
var grpc = require('grpc');
const path = 'path/to/proto'
const rootPath = 'root/path'
console.log({root: rootPath, file: path})
const identityService = grpc.load({root: rootPath, file: path}).identity.service;
const grpcCredentials = grpc.credentials.createInsecure();
const identityClient = new identityService.Identity('localhost:8020', grpcCredentials)
/* GET home page. */
router.get('/', function(req, res, next) {
ns = cls.getNamespace('THING');
console.log(ns.get('thing-id'));
const retrievePartyReq = {
party_id: 'party123',
}
identityClient.retrieveParty(retrievePartyReq, (err, response) => {
ns = cls.getNamespace('THING');
console.log(ns.get('thing-id'));
})
res.status(200).send('200: All is good.');
});
module.exports = router;
This outputs in the logs:
123
undefined
Where I would expect 123 both times. Why can't I grab the value from the namespace from within the gRPC request?
