Crate tracing_modality
source · [−]Expand description
tracing-modality
tracing-modality
provides a tracing.rs Subscriber
for tracing systems
written in Rust to Auxon Modality.
The quickest (and as of this version, only) way to get started is to let
TracingModality
register itself as the global default tracer, done most
simply using TracingModality::init()
use tracing::debug;
use tracing_modality::TracingModality;
use tracing::info;
fn main() {
TracingModality::init().expect("init");
info!("my application has started");
}
Some basic configuration options are also available to be set at init with
TracingModality::init_with_options
.
Usage
After the initial setup, shown above, this library is not used directly, but is
used via macros defined in tracing.rs. These macros function much like the
log
crate’s logging macros error
, warn
, info
, debug
and trace
,
except they also allow you to pass in structured values, in the form of fields,
that are recorded in the trace data as standalone values rather than being
stringified into the log message.
Additionally, tracing
provides a similar set of macros for emitting spans:
error_span
, warn_span
, info_span
, debug_span
, and trace_span
. Spans
are used to label regions of execution.
There are also many more ways to use tracing
, such as the #[instrument]
attribute and the Value
trait. See tracing
’s documentation
for the full API.
Metadata and Fields
Each event or span creation has the fields and message directly provided as well as some metadata about where it was called from. This data is mapped to Modality trace data as follows:
Metadata
message
orname
->event.name
level
->event.severity
module_path
->event.source.module
file
->event.source.file
line
->event.source.line
- the kind of event ->
event.internal.rs.kind
[“span:defined”, “span:enter”, “span:exit” ] id
->event.internal.rs.span_id
Fields
All fields are mapped directly as is to event.*
, excect fields prefixed with
modality.
which are mapped to the datasource specific namespace
event.internal.rs.*
. Fields manually set will overwrite any any default
values set by metadata, if present.
License
Copyright 2022 Auxon Corporation
Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
Structs
A tracing
collector Layer
.
Initialization options.
Timelines are identified by a UUID. These are timeline instances; a given location (identified by its name) is associated with many timelines.
A global tracer instance for tracing.rs that sends traces via a network socket to Modality.
Enums
Functions
Retrieve the current local timeline ID. Useful for for sending alongside data and a custom nonce for recording timeline interactions on remote timelines.