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_BATCH_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "batch.googleapis.com") used by MakeBatchServiceConnection().
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 2025-03-05 UTC."],[[["The webpage provides documentation for various versions of a C++ library, ranging from version 2.11.0 up to the latest release candidate, 2.37.0-rc."],["The documentation covers environment variables that can be used to configure the library's behavior, including options for endpoint overrides, tracing, and logging."],["The `GOOGLE_CLOUD_CPP_BATCH_SERVICE_ENDPOINT` environment variable can be used to override the default endpoint for the Batch Service."],["Enabling tracing and logging can be done using the `GOOGLE_CLOUD_CPP_ENABLE_TRACING` and `GOOGLE_CLOUD_CPP_ENABLE_CLOG` environment variables, respectively, and additional options can be modified through `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`."],["`GOOGLE_CLOUD_PROJECT` can be set in examples and integration tests, but it does not have an effect in the library."]]],[]]
