A number of environment variables can be used to configure the behavior of the library. There are also functions to configure this behavior in code. The environment variables are convenient when troubleshooting problems.
Endpoint Overrides
GOOGLE_CLOUD_CPP_ADMIN_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "pubsublite.googleapis.com") used by MakeAdminServiceConnection().
GOOGLE_CLOUD_CPP_TOPIC_STATS_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "pubsublite.googleapis.com") used by MakeTopicStatsServiceConnection().
GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc: turns on tracing for most gRPC calls. The library injects an additional Stub decorator that prints each gRPC request and response. Unless you have configured your own logging backend, you should also set GOOGLE_CLOUD_CPP_ENABLE_CLOG to produce any output on the program's console.
See Also
google::cloud::TracingComponentsOptionGOOGLE_CLOUD_CPP_TRACING_OPTIONS=...: modifies the behavior of gRPC tracing, including whether messages will be output on multiple lines, or whether string/bytes fields will be truncated.
See Also
google::cloud::GrpcTracingOptionsOptionGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes: turns on logging in the library, basically the library always "logs" but the logging infrastructure has no backend to actually print anything until the application sets a backend or they set this environment variable.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-04-17 UTC."],[[["The webpage provides documentation for various versions of the Pub/Sub Lite C++ library, ranging from version 2.11.0 to 2.36.0, with version 2.37.0-rc being the latest release candidate."],["Environment variables can be used to configure the behavior of the Pub/Sub Lite C++ library, offering flexibility, particularly during troubleshooting."],["`GOOGLE_CLOUD_CPP_ADMIN_SERVICE_ENDPOINT` and `GOOGLE_CLOUD_CPP_TOPIC_STATS_SERVICE_ENDPOINT` can override default endpoint options for the Admin Service and Topic Stats Service connections, respectively."],["Tracing for gRPC calls can be enabled using `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, which, when used with `GOOGLE_CLOUD_CPP_ENABLE_CLOG`, will print detailed request and response information."],["`GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes` enables the logging function in the library, allowing the output of logs to the console."]]],[]]
