cloud Topic should enable filtering by event payloads

[skorfmann]

I tried this:

Applying a filter to onMessage so the subscription is invoked only on things I'm interested in

let foo = new cloud.Topic();

foo.onMessage(inflight () => {
  // code
});

This happened:

no option to define a filter

I expected this:

being able to subscribe to certain events only

Is there a workaround?

override it in platform

Anything else?

No response

Wing Version

0.51.7

Node.js Version

18.7

Platform(s)

MacOS

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[eladb]

Can you provide some examples of filters? Are you thinking of something like:

topic.onMessage(match: "<some query language>", () => {
});

[skorfmann]

Can you provide some examples of filters? Are you thinking of something like:

topic.onMessage(match: "<some query language>", () => {
});

Something based on https://docs.aws.amazon.com/sns/latest/dg/sns-subscription-filter-policies.html would be good. In particular string matchers would go a long way already.

• prefix
• suffix
• equals

Can update with actual use-cases once I get to the implementation of where we're planning to use it.

[Chriscbr]

See also https://github.com/winglang/wing/issues/5209

[github-actions[bot]]

Hi,

This issue hasn't seen activity in 60 days. Therefore, we are marking this issue as stale for now. It will be closed after 7 days. Feel free to re-open this issue when there's an update or relevant information to be added. Thanks!