{"id":28589622,"url":"https://github.com/fast/fastrace-tower","last_synced_at":"2025-06-11T08:10:46.026Z","repository":{"id":293399028,"uuid":"982731771","full_name":"fast/fastrace-tower","owner":"fast","description":"A tower layer for propagating trace context for fastrace","archived":false,"fork":false,"pushed_at":"2025-05-15T06:07:19.000Z","size":12,"stargazers_count":0,"open_issues_count":0,"forks_count":1,"subscribers_count":1,"default_branch":"main","last_synced_at":"2025-05-15T06:31:36.600Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"Rust","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"apache-2.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/fast.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null}},"created_at":"2025-05-13T10:22:16.000Z","updated_at":"2025-05-15T06:07:23.000Z","dependencies_parsed_at":"2025-05-15T06:43:26.667Z","dependency_job_id":null,"html_url":"https://github.com/fast/fastrace-tower","commit_stats":null,"previous_names":["fast/fastrace-tower"],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fast%2Ffastrace-tower","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fast%2Ffastrace-tower/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fast%2Ffastrace-tower/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fast%2Ffastrace-tower/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/fast","download_url":"https://codeload.github.com/fast/fastrace-tower/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fast%2Ffastrace-tower/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":259227958,"owners_count":22824904,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2025-06-11T08:10:42.536Z","updated_at":"2025-06-11T08:10:46.014Z","avatar_url":"https://github.com/fast.png","language":"Rust","funding_links":[],"categories":[],"sub_categories":[],"readme":"# fastrace-tower\n\n[![Crates.io](https://img.shields.io/crates/v/fastrace-tower.svg?style=flat-square\u0026logo=rust)](https://crates.io/crates/fastrace-tower)\n[![Documentation](https://img.shields.io/docsrs/fastrace-tower?style=flat-square\u0026logo=rust)](https://docs.rs/fastrace-tower/)\n[![MSRV 1.80.0](https://img.shields.io/badge/MSRV-1.80.0-green?style=flat-square\u0026logo=rust)](https://www.whatrustisit.com)\n[![CI Status](https://img.shields.io/github/actions/workflow/status/fast/fastrace-tower/ci.yml?style=flat-square\u0026logo=github)](https://github.com/fast/fastrace-tower/actions)\n[![License](https://img.shields.io/crates/l/fastrace-tower?style=flat-square)](https://github.com/fast/fastrace-tower/blob/main/LICENSE)\n\n`fastrace-tower` is a middleware library that connects [fastrace](https://crates.io/crates/fastrace), a distributed tracing library, with [tower](https://crates.io/crates/tower), modular and reusable components for building robust networking clients and servers. This integration enables seamless trace context propagation across microservice boundaries in applications based on tower.\n\n## What is Context Propagation?\n\nContext propagation is a fundamental concept in distributed tracing that enables the correlation of operations spanning multiple services. When a request moves from one service to another, trace context information needs to be passed along, ensuring that all operations are recorded as part of the same trace.\n\n`fastrace-tower` implements the [W3C Trace Context](https://www.w3.org/TR/trace-context/) standard for propagating trace information between services. This ensures compatibility with other tracing systems that follow the same standard.\n\n## Features\n\n- 🔄 **Automatic Context Propagation**: Automatically inject trace context into outgoing gRPC requests.\n- 🌉 **Seamless Integration**: Works seamlessly with the `fastrace` library for complete distributed tracing.\n- 📊 **Full Compatibility**: Works with fastrace's collection and reporting capabilities.\n\n## How It Works\n\n1. When a client makes a request, `FastraceClientLayer` detects if there's an active trace and adds a `traceparent` HTTP header with the trace context.\n2. When a server receives the request, `FastraceServerLayer` extracts the trace context from the `traceparent` header and creates a new span as a child of the received context.\n3. If no trace context is provided, the server creates a new root span.\n\nThis process ensures that all operations across services are properly connected in the resulting trace, providing visibility into the entire request lifecycle.\n\n## License\n\nThis project is licensed under the [Apache-2.0](./LICENSE) license.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ffast%2Ffastrace-tower","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Ffast%2Ffastrace-tower","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ffast%2Ffastrace-tower/lists"}