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_API_GATEWAY_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "apigateway.googleapis.com") used by MakeApiGatewayServiceConnection().
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."],[[["This page documents the different versions of the API Gateway service, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc, with each version having its corresponding documentation available."],["Environment variables can be utilized to configure the library's behavior, which is particularly beneficial when debugging issues, as an alternative to configuring it via code."],["The `GOOGLE_CLOUD_CPP_API_GATEWAY_SERVICE_ENDPOINT` environment variable allows overriding the default endpoint used by `MakeApiGatewayServiceConnection`."],["Tracing for gRPC calls can be enabled using the `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc` environment variable, along with the use of `GOOGLE_CLOUD_CPP_ENABLE_CLOG` for console output, if no custom logging backend is configured."],["The `GOOGLE_CLOUD_PROJECT` environment variable can be set for configuring the GCP project in examples and integration tests."]]],[]]
