package trace-tef

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in-package search v0.2.0

A simple backend for trace, emitting Catapult/TEF JSON into a file

Install

sha256=9739d5f46becb407e96943f4f0d6d0919e03c14299ab9c2ddbb8d46b6f7a3ea4

sha512=500230dedc834cbb8535a1624408c2f0e67683bacef5e4a55b7639c4013f6247d3aa4cbc56b61810d0138f736c1245b6b334bd3991c2e86d03faee47b729c547

Emit traces by talking to the tldrs daemon

Sourceval collector : out:[ `File of string ] -> unit -> Trace_core.collector

Make a collector that writes into the given output. See setup for more details.

Sourceval subscriber : out:[ `File of string ] -> unit -> Trace_subscriber.t

Make a subscriber that writes into the given output.

Sourcetype output = [

]

Output for tracing.

`File "foo" will enable tracing and print events into file named "foo". The file is only written at exit.

Sourceval setup : ?out:[ output | `Env ] -> unit -> unit

setup () installs the collector depending on out.

parameter out
can take different values:
- regular output value to specify where events go
- `Env will enable tracing if the environment variable "TRACE" is set.

If it's set to "1", then the file is "trace.json".
If it's set to "stdout", then logging happens on stdout (since 0.2)
If it's set to "stderr", then logging happens on stdout (since 0.2)
Otherwise, if it's set to a non empty string, the value is taken to be the file path into which to write.

Sourceval with_setup : ?out:[ output | `Env ] -> unit -> (unit -> 'a) -> 'a

with_setup () f (optionally) sets a collector up, calls f(), and makes sure to shutdown before exiting.