Passing an existing instance

[net-tech]

Hi there,

I already use Pino for my app and was considering adding Elysia. Is there a way to pass my current Pino instance into Elysia?

Thanks.

[bogeychan]

Hi, passing an existing instance is not supported atm, you can use the createPinoLogger function from this plugin to create a standalone (pino) logger for use outside the Elysia handler context instead, as stated in the README. It supports all pino options:

elysia-logger/examples/on-error-with-context.ts

Line 16 in a1c27e5

const log = createPinoLogger({

To integrate it into an Elysia instance, call app.use(log.into()) as you would with any plugin.

elysia-logger/examples/on-error-with-context.ts

Line 34 in a1c27e5

.use(log.into()) // Call `into` to use the logger instance in both `ctx` and standalone

log.into(...) allows additional options to customize its behavior in Elysia.

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Does this work for your scenario?

[bogeychan]

If you use custom formatters or serializers in your logger logic, ensure you include those provided by this plugin to maintain its usual behavior:

elysia-logger/examples/on-error-with-context.ts

Lines 18 to 19 in a1c27e5

	formatters: {
	...formatters,

They are only set if the createPinoLogger options are undefined-like:

elysia-logger/src/index.ts

Lines 72 to 73 in a1c27e5

	options.formatters ??= formatters;
	options.serializers ??= serializers;

[net-tech]

While that works, its not ideal since it is still creating another Pino instance and any changes we make in one setup need to be copied over to the other. Is there any chance this issue could become a feature request?

[bogeychan]

The idea is to replace the old pino instance with createPinoLogger instead of 2. Does that cause any issues for you?

If so, can you please share more information/code snippet on how you create / manage your pino instance?

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I'll look into adding this feature.