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//#![deny(warnings)]
//! Provides a client interface for [AWS X-Ray](https://aws.amazon.com/xray/)
//!
//! ### Examples
//!
//! #### Subsegment of AWS service operation
//!
//! **The [`xray_lite_aws_sdk`](https://docs.rs/xray-lite-aws-sdk) extension is
//! recommended for tracing operations through
//! [AWS SDK for Rust](https://aws.amazon.com/sdk-for-rust/).**
//!
//! Here is an example to record a subsegment of an AWS service operation
//! within a Lambda function invocation instrumented with AWS X-Ray:
//!
//! ```
//! use xray_lite::{AwsNamespace, Context, DaemonClient, SubsegmentContext};
//!
//! fn main() {
//! // reads AWS_XRAY_DAEMON_ADDRESS
//! # std::env::set_var("AWS_XRAY_DAEMON_ADDRESS", "127.0.0.1:2000");
//! let client = DaemonClient::from_lambda_env().unwrap();
//! // reads _X_AMZN_TRACE_ID
//! # std::env::set_var("_X_AMZN_TRACE_ID", "Root=1-65dfb5a1-0123456789abcdef01234567;Parent=0123456789abcdef;Sampled=1");
//! let context = SubsegmentContext::from_lambda_env(client).unwrap();
//!
//! do_s3_get_object(&context);
//! }
//!
//! fn do_s3_get_object(context: &impl Context) {
//! // subsegment will have the name "S3" and `aws.operation` "GetObject"
//! let subsegment = context.enter_subsegment(AwsNamespace::new("S3", "GetObject"));
//!
//! // call S3 GetObject ...
//!
//! // if you are using `aws-sdk-s3` crate, you can update the subsegment
//! // with the request ID. suppose `out` is the output of the `GetObject`
//! // operation:
//! //
//! // subsegment
//! // .namespace_mut()
//! // .zip(out.request_id())
//! // .map(|(ns, id)| ns.request_id(id));
//!
//! // the subsegment will be ended and reported when it is dropped
//! }
//! ```
//!
//! #### Subsegment of remote service call
//!
//! Here is an example to record a subsegment of a remote service call within a
//! Lambda function invocation intstrumented with AWS X-Ray:
//!
//! ```
//! use xray_lite::{Context, DaemonClient, RemoteNamespace, SubsegmentContext};
//!
//! fn main() {
//! // reads AWS_XRAY_DAEMON_ADDRESS
//! # std::env::set_var("AWS_XRAY_DAEMON_ADDRESS", "127.0.0.1:2000");
//! let client = DaemonClient::from_lambda_env().unwrap();
//! // reads _X_AMZN_TRACE_ID
//! # std::env::set_var("_X_AMZN_TRACE_ID", "Root=1-65dfb5a1-0123456789abcdef01234567;Parent=0123456789abcdef;Sampled=1");
//! let context = SubsegmentContext::from_lambda_env(client).unwrap();
//!
//! do_some_request(&context);
//! }
//!
//! fn do_some_request(context: &impl Context) {
//! // subsegment will have the name "readme example",
//! // `http.request.method` "POST", and `http.request.url` "https://codemonger.io/"
//! let subsegment = context.enter_subsegment(RemoteNamespace::new(
//! "readme example",
//! "GET",
//! "https://codemonger.io/",
//! ));
//!
//! // do some request ...
//!
//! // the subsegment will be ended and reported when it is dropped
//! }
//! ```
//!
//! #### Custom subsegment
//!
//! Here is an example to record a custom subsegment within a Lambda function
//! invocation intstrumented with AWS X-Ray:
//!
//! ```
//! use xray_lite::{Context, DaemonClient, CustomNamespace, SubsegmentContext};
//!
//! fn main() {
//! // reads AWS_XRAY_DAEMON_ADDRESS
//! # std::env::set_var("AWS_XRAY_DAEMON_ADDRESS", "127.0.0.1:2000");
//! let client = DaemonClient::from_lambda_env().unwrap();
//! // reads _X_AMZN_TRACE_ID
//! # std::env::set_var("_X_AMZN_TRACE_ID", "Root=1-65dfb5a1-0123456789abcdef01234567;Parent=0123456789abcdef;Sampled=1");
//! let context = SubsegmentContext::from_lambda_env(client).unwrap()
//! .with_name_prefix("readme_example.");
//!
//! do_something(&context);
//! }
//!
//! fn do_something(context: &impl Context) {
//! // subsegment will have the name "readme_example.do_something"
//! let subsegment = context.enter_subsegment(CustomNamespace::new("do_something"));
//!
//! // do some thing ...
//!
//! // the subsegment will be ended and reported when it is dropped
//! }
//! ```
//!
//! ### Acknowledgements
//!
//! This crate is based on the [great work](https://github.com/softprops/xray)
//! by [Doug Tangren (softprops)](https://github.com/softprops).
pub use crate::;