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_PROCESSOR_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "
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 page documents the environment variables for configuring the Document AI C++ client library, including endpoint overrides and logging settings."],["The most recent release candidate for the Document AI C++ library is version 2.37.0-rc, with a list of past versions also provided on this page."],["Environment variables such as `GOOGLE_CLOUD_CPP_DOCUMENT_PROCESSOR_SERVICE_ENDPOINT` can be used to override default endpoints and `GOOGLE_CLOUD_CPP_ENABLE_TRACING` can enable gRPC tracing."],["`GOOGLE_CLOUD_CPP_ENABLE_CLOG` enables logging within the library, and `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` can further modify gRPC tracing behavior."],["`GOOGLE_CLOUD_PROJECT` can set the default GCP project, although it has no effect on the library behavior."]]],[]]
