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::LoggingComponentsOptionGOOGLE_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 latest release candidate version is 2.37.0-rc, and the current stable version is 2.36.0, with links provided for documentation on versions from 2.11.0 through 2.36.0."],["Environment variables are available to configure the library's behavior and are particularly useful for troubleshooting, with options including overriding endpoints and enabling logging."],["The `GOOGLE_CLOUD_CPP_BATCH_SERVICE_ENDPOINT` environment variable allows users to override the default endpoint used by `MakeBatchServiceConnection()`, which is \"batch.googleapis.com\"."],["Tracing for gRPC calls can be enabled with `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, and console output can be achieved by additionally setting `GOOGLE_CLOUD_CPP_ENABLE_CLOG`."],["Setting `GOOGLE_CLOUD_PROJECT` configures the project for integration testing, but has no effect in the library itself."]]],[]]
