package trace

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Main API

package trace

trace
- Library trace
  - Trace
    
    Collector
    
    Meta_map
    
    Level
- Library trace.core
  - Trace_core
    
    Collector
    
    S
    
    Meta_map
    
    KEY_IMPL
    
    Key
    
    M
    
    Level
- Library trace.event
  - Trace_event
    
    Event
    
    Sub
    
    Subscriber
    
    Callbacks
- Library trace.subscriber
  - Trace_subscriber
    
    Callbacks
    
    S
    
    Dummy
    
    Subscriber
    
    Span_tbl
- Library trace_private_util
  - Trace_private_util
    
    Domain_util
    
    Rpool
- Sources
  - trace
    
    trace.ml
  - trace.core
    
    atomic_.ml
    
    collector.ml
    
    level.ml
    
    meta_map.ml
    
    trace_core.ml
    
    trace_core__.ml
    
    types.ml
  - trace.event
    
    event.ml
    
    subscriber.ml
    
    trace_event.ml
  - trace.subscriber
    
    callbacks.ml
    
    span_tbl.ml
    
    subscriber.ml
    
    trace_subscriber.ml
    
    trace_subscriber__.ml
    
    types.ml
  - trace_private_util
    
    domain_util.ml
    
    rpool.ml
    
    trace_private_util.ml

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Module `Trace_subscriber`Source

Generic subscribers.

This defines the notion of a subscriber, a set of callbacks for every trace event. It also defines a collector that needs to be installed for the subscriber(s) to be called.

Thanks to Subscriber.tee_l it's possible to combine multiple subscribers into a single collector.

since 0.8

Sourcemodule Callbacks : sig ... end

Callbacks used for subscribers.

Sourcemodule Subscriber : sig ... end

Trace subscribers

Sourcemodule Span_tbl : sig ... end

A table that can be used to remember information about spans.

Sourcetype user_data =

| U_bool of bool
| U_float of float
| U_int of int
| U_none
| U_string of string
(*
A non polymorphic-variant version of Trace_core.user_data
*)

Sourcetype flavor =

| Sync
| Async
(*
A non polymorphic-variant version of Trace_core.flavor
*)

Main API

Sourcetype t = Subscriber.t

A trace subscriber. It pairs a set of callbacks with the state they need (which can contain a file handle, a socket to write events to, config, etc.).

The design goal for this is that it should be possible to avoid allocations whenever the trace collector invokes the callbacks.

Sourceval collector : t -> Trace_core.collector

A collector that calls the subscriber's callbacks.

It uses mtime (if available) to obtain timestamps.

package trace

Module Trace_subscriberSource

Main API

Module `Trace_subscriber`Source