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_APIGEE_CONNECTION_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "apigeeconnect.googleapis.com") used by MakeConnection().
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 webpage provides documentation for various versions of the Apigee Connect C++ client library, ranging from version 2.11.0 up to the release candidate 2.37.0-rc, which is noted as the latest."],["Environment variables such as `GOOGLE_CLOUD_CPP_APIGEE_CONNECTION_SERVICE_ENDPOINT` can be used to override default endpoint settings for the Apigee Connection Service."],["Tracing for gRPC calls can be enabled using `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, and logging output can be directed to the console by also setting `GOOGLE_CLOUD_CPP_ENABLE_CLOG`."],["The behavior of gRPC tracing can be modified by using the environment variable `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`."],["`GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes` activates the library's logging output, which, by default, does not have a backend to print logs until this variable or a custom backend is implemented."]]],[]]
