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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 OverridesGOOGLE_CLOUD_CPP_APP_CONNECTIONS_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "beyondcorp.googleapis.com") used by MakeAppConnection().GOOGLE_CLOUD_CPP_APP_CONNECTORS_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "beyondcorp.googleapis.com") used by MakeAppConnectorsServiceConnection().GOOGLE_CLOUD_CPP_APP_GATEWAYS_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "beyondcorp.googleapis.com") used by MakeAppGatewaysServiceConnection().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.
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.
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.
GOOGLE_CLOUD_PROJECT=...: is used in examples and integration tests to configure the GCP project. This has no effect in the library.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-08-14 UTC.
[[["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 2025-08-14 UTC."],[[["The documentation covers versions of the BeyondCorp C++ library, ranging from the latest release candidate 2.37.0-rc down to version 2.11.0, with each version linking to its respective documentation."],["Environment variables can be used to configure the library's behavior, providing a convenient method for troubleshooting and adjusting settings."],["Endpoint overrides, such as `GOOGLE_CLOUD_CPP_APP_CONNECTIONS_SERVICE_ENDPOINT`, allow users to modify the default endpoint used by different service connections within the library."],["Tracing and logging can be enabled and customized through environment variables like `GOOGLE_CLOUD_CPP_ENABLE_TRACING`, `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`, and `GOOGLE_CLOUD_CPP_ENABLE_CLOG`, allowing detailed insight into gRPC calls and library operations."],["While `GOOGLE_CLOUD_PROJECT` can set the default GCP project in examples and tests, it does not have any impact on the C++ library itself."]]],[]]
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