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_LANGUAGE_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "language.googleapis.com") used by MakeLanguageServiceConnection().
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."],[[["This document provides version-specific documentation for the C++ language library, with the latest release candidate being version 2.37.0-rc and the current version at 2.24.0."],["Environment variables, such as `GOOGLE_CLOUD_CPP_LANGUAGE_SERVICE_ENDPOINT`, `GOOGLE_CLOUD_CPP_ENABLE_TRACING`, and `GOOGLE_CLOUD_CPP_ENABLE_CLOG`, can be used to configure various behaviors, including endpoint overrides and logging for troubleshooting."],["The library supports gRPC tracing through `GOOGLE_CLOUD_CPP_ENABLE_TRACING`, which allows for the printing of gRPC requests and responses, and further customization is available with `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`."],["Logging in the library is enabled via `GOOGLE_CLOUD_CPP_ENABLE_CLOG`, which directs output to the program's console when set, but without it the library will still log but without any output displayed."],["`GOOGLE_CLOUD_PROJECT` will allow you to set the default project to be used for examples and integration tests, though it has no actual effect on the library itself."]]],[]]
