https://github.com/trentm/tmp-cmeta

tmp play repo
https://github.com/trentm/tmp-cmeta

Last synced: about 1 month ago
JSON representation

tmp play repo

• Host: GitHub
• URL: https://github.com/trentm/tmp-cmeta
• Owner: trentm
• Created: 2021-01-08T00:55:48.000Z (almost 4 years ago)
• Default Branch: master
• Last Pushed: 2021-01-08T01:02:47.000Z (almost 4 years ago)
• Last Synced: 2024-10-19T19:54:59.648Z (2 months ago)
• Language: JavaScript
• Size: 1.95 KB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        

```

% node userapp.js

AGENT: start gathering                      <-- start gathering on agent.start()

AGENT: agent started

USERAPP: sending span                       <-- app sends span before gathering is done

AGENT: sending a span

USERAPP: listening at http://localhost:3000

AGENT: done gathering                       <-- when gathered ...

CLIENT: got encoded metadata                <-- client gets it and uses it:

{"thisIsMyCloud":"there are many like it"}

{"name":"setup","time":"2021-01-08T00:59:04.664Z"}

AGENT: emitted metadata event

                                            <-- curl localhost:3000

AGENT: sending a span

CLIENT: got encoded metadata                <-- gets cached metadata

{"thisIsMyCloud":"there are many like it"}

{"name":"handled request","time":"2021-01-08T00:59:15.702Z"}

^C

```

Or with a number of `curl localhost:3000` requests before the metadata is

gathered they buffer up on that `this._conf.metadataGatherer.once('metadata',`.

```

% node userapp.js

AGENT: start gathering

AGENT: agent started

USERAPP: sending span

AGENT: sending a span

USERAPP: listening at http://localhost:3000

AGENT: sending a span

AGENT: sending a span

AGENT: sending a span

AGENT: done gathering

CLIENT: got encoded metadata

{"thisIsMyCloud":"there are many like it"}

{"name":"setup","time":"2021-01-08T01:00:16.114Z"}

CLIENT: got encoded metadata

{"thisIsMyCloud":"there are many like it"}

{"name":"handled request","time":"2021-01-08T01:00:18.183Z"}

CLIENT: got encoded metadata

{"thisIsMyCloud":"there are many like it"}

{"name":"handled request","time":"2021-01-08T01:00:18.911Z"}

CLIENT: got encoded metadata

{"thisIsMyCloud":"there are many like it"}

{"name":"handled request","time":"2021-01-08T01:00:19.579Z"}

AGENT: emitted metadata event

```

If we are worried about that buffering too large, then we could consider a

limited queue, but I'm not sure that's a concern for startup time.