2.4

Changes since v2.3:

• Added USERVER_LOG_REQUEST_HEADERS_WHITELIST to control the HTTP headers to log.
• OpenTelemetry protocol (OTLP) now can optionally do only logging or only tracing. Thanks to TertiumOrganum1 for the PR!
• The framework now accepts OTLP headers for tracing by default and puts those headers for new requests.
• PostgreSQL span names are now a little bit more informative. Thanks to TertiumOrganum1 for the PR!
• Kafka now has a client.id static option. Many thanks to Nikolay Pervushin for the PR.
• PostgreSQL type errors become more informative. Thanks to farmovit for the report!
• Optimizations:
  • HTTP/2 server implementation now does not copy data to send, saving CPU and RAM.
  • HTTP/2 now relies on open-addressing unordered map from nghttp2, leading to faster stream lookup.
  • Kafka consumer now does not block a task processor thread, allowing multiple consumers to share the same OS thread. Consume cycle now can be treated as an asynchronous non-blocking event loop.
  • Kafka producer delivery acknowledgments processing is now done in parallel, leading to better scalability. Also it does not block the OS thread when waiting for new delivery acknowledgments.
  • Internals of all the Sockets became smaller in size, saving some RAM.
• gRPC:
  • gRPC in testsuite now automatically calls pytest_userver.client.Client.update_server_state. The behavior now matches HTTP.
  • gRPC server now supports unix-sockets via unix-socket-path static config option.
  • gRPC clients now log requests/responses via the ugrpc::client::middlewares::log::Component middleware. Improved gRPC client and server.
  • New component ugrpc::client::CommonComponent with common options for all the gRPC clients.
• Build, Install and CI:
  • OTLP build is now supported in Conan. Thanks to Amina Ramazanova for the PR!
  • Chaotic now exposes less headers, leading to faster build times.
  • Fixed compilation on modern Boost.UUID. Thanks to Alexander Botev for the PR!
  • Added dependabot to CI and updated the dependencies. Thanks to Dzmitry Ivaniuk for the PR!
  • Added missing #include. Thanks to Nikita for the PR!
  • Removed outdated defines in the core. Thanks to Sergey Kazmin for the PR!
  • Install now does not put third party headers into the top level include directory. Multiple unused files are now not installed.
  • Started the work to enable builds in directories with whitespace in names.
• Documentation:
  • More docs for gRPC middlewares at gRPC and gRPC middleware.
  • More docs for otlp::LoggerComponent. Thanks to TertiumOrganum1 for the PR!
  • Set proper Content-Type in samples.