Module lambda_runtime::tracing

Utilities to initialize and use tracing and tracing-subscriber in Lambda Functions. This module provides primitives to work with tracing and tracing-subscriber in Lambda functions.

The tracing and tracing-subscriber crates are re-exported so you don’t have to include them as direct dependencies in your projects.

Modules

• callsite
  Callsites represent the source locations from which spans or events originate.
• dispatcher
  Dispatches trace events to Subscribers.
• event
  Events represent single points in time during the execution of a program.
• field
  Span and Event key-value data.
• instrument
  Attach a span to a std::future::Future.
• level_filters
  Trace verbosity level filtering.
• metadata
  Metadata describing trace data.
• span
  Spans represent periods of time in which a program was executing in a particular context.
• subscriber
  Utilities for implementing and composing tracing subscribers.

Macros

• debug
  Constructs an event at the debug level.
• debug_span
  Constructs a span at the debug level.
• enabled
  Checks whether a span or event is enabled based on the provided metadata.
• error
  Constructs an event at the error level.
• error_span
  Constructs a span at the error level.
• event
  Constructs a new Event.
• event_enabled
  Tests whether an event with the specified level and target would be enabled.
• info
  Constructs an event at the info level.
• info_span
  Constructs a span at the info level.
• metadata
  Statically constructs new span metadata.
• span
  Constructs a new span.
• span_enabled
  Tests whether a span with the specified level and target would be enabled.
• trace
  Constructs an event at the trace level.
• trace_span
  Constructs a span at the trace level.
• warn
  Constructs an event at the warn level.
• warn_span
  Constructs a span at the warn level.

Structs

• Dispatch
  Dispatch trace data to a Subscriber.
• Event
  Events represent single points in time where something occurred during the execution of a program.
• Id
  Identifies a span within the context of a subscriber.
• Level
  Describes the level of verbosity of a span or event.
• Metadata
  Metadata describing a span or event.
• Span
  A handle representing a span, with the capability to enter the span if it exists.

Traits

• Callsite
  Trait implemented by callsites.
• Instrument
  Attaches spans to a std::future::Future.
• Subscriber
  Trait representing the functions required to collect trace data.
• Value
  A field value of an erased type.

Functions

• init_default_subscriber
  Initialize tracing-subscriber with default options. The subscriber uses RUST_LOG as the environment variable to determine the log level for your function. It also uses Lambda’s advance logging controls if they’re configured for your function. By default, the log level to emit events is INFO.

Attribute Macros

• instrument
  Instruments a function to create and enter a tracing span every time the function is called.