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_DOMAINS_ENDPOINT=... overrides the EndpointOption (which defaults to "domains.googleapis.com") used by MakeDomainsConnection().
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 document provides a comprehensive list of available versions for the C++ Domains library, ranging from version 2.12.0 up to the latest release candidate, 2.37.0-rc."],["Environment variables like `GOOGLE_CLOUD_CPP_DOMAINS_ENDPOINT` can be used to override the default endpoint for the Domains library, allowing users to specify custom endpoint configurations."],["The library supports gRPC call tracing via `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, which, when combined with `GOOGLE_CLOUD_CPP_ENABLE_CLOG`, enables detailed logging of gRPC requests and responses to the console."],["Logging within the library can be enabled using `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes`, allowing the library to output log data to a configured backend or the program's console."],["While `GOOGLE_CLOUD_PROJECT` can be set for examples and tests, it is important to note that it has no effect within the library itself."]]],[]]
