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_DOCUMENT_LINK_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "contentwarehouse.googleapis.com") used by MakeDocumentLinkServiceConnection().
GOOGLE_CLOUD_CPP_DOCUMENT_SCHEMA_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "contentwarehouse.googleapis.com") used by MakeDocumentSchemaServiceConnection().
GOOGLE_CLOUD_CPP_DOCUMENT_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "contentwarehouse.googleapis.com") used by MakeDocumentServiceConnection().
GOOGLE_CLOUD_CPP_RULE_SET_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "contentwarehouse.googleapis.com") used by MakeRuleSetServiceConnection().
GOOGLE_CLOUD_CPP_SYNONYM_SET_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "contentwarehouse.googleapis.com") used by MakeSynonymSetServiceConnection().
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"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThis page lists various versions of the Content Warehouse library, ranging from version 2.12.0 to the latest release candidate 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eEnvironment variables can be utilized to adjust the library's behavior, particularly useful for troubleshooting and modifying endpoints.\u003c/p\u003e\n"],["\u003cp\u003eSpecific environment variables, like \u003ccode\u003eGOOGLE_CLOUD_CPP_DOCUMENT_LINK_SERVICE_ENDPOINT\u003c/code\u003e, \u003ccode\u003eGOOGLE_CLOUD_CPP_DOCUMENT_SCHEMA_SERVICE_ENDPOINT\u003c/code\u003e, \u003ccode\u003eGOOGLE_CLOUD_CPP_DOCUMENT_SERVICE_ENDPOINT\u003c/code\u003e, \u003ccode\u003eGOOGLE_CLOUD_CPP_RULE_SET_SERVICE_ENDPOINT\u003c/code\u003e, and \u003ccode\u003eGOOGLE_CLOUD_CPP_SYNONYM_SET_SERVICE_ENDPOINT\u003c/code\u003e, are used to override the default endpoint.\u003c/p\u003e\n"],["\u003cp\u003eLogging and tracing can be enabled via environment variables such as \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING\u003c/code\u003e, \u003ccode\u003eGOOGLE_CLOUD_CPP_TRACING_OPTIONS\u003c/code\u003e, and \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG\u003c/code\u003e, and these are valuable tools for debugging and monitoring gRPC calls.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eGOOGLE_CLOUD_PROJECT\u003c/code\u003e environment variable can be used to specify the default GCP project, but it only affects examples and tests, not the library directly.\u003c/p\u003e\n"]]],[],null,[]]
