OpenCensus is a toolkit for collecting application performance and behavior data. It currently includes an API for tracing and stats.

This library is currently in alpha: the API is in the process of being finalized; much of the implementation will be replaced with a more optimized one in the near future.

Please join gitter for help or feedback on this project.

This is not an officially supported Google product.

Please refer to examples/helloworld/ for an example of instrumentation with OpenCensus.

Please refer to examples/grpc/ for an example RPC server that integrates gRPC, Stackdriver, and Prometheus.

Please refer to trace/examples/span_example.cc for tracing and stats/examples/view_and_recording_example.cc for stats.

• opencensus/ prefix to get #include paths like opencensus/trace/span.h
  • common/ - Provides common libraries and components for OpenCensus.
  • doc/ - Documentation for our APIs, coding style, etc.
  • exporters/ - Exporters send stats and traces to monitoring services.
  • plugins/ - Plugins add OpenCensus instrumentation to frameworks.
  • stats/ - OpenCensus stats API.
  • trace/ - OpenCensus tracing API.

• STL is required. (e.g. libstdc++, libc++, etc)
• C++11 is required.
• absl is used for its building blocks.
• googletest is used for tests.
• benchmark is used for benchmarking.
• We do not depend on:
  • Boost
  • Exception handling
  • RTTI

We are targeting the following compilers:

• gcc 4.8.1
• clang 3.4
• Microsoft Visual Studio 2017 15.9 (see the appveyor documentation for the exact version)