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 document outlines the available versions of the Document AI C++ library, with version 2.37.0-rc being the latest."],["Environment variables, such as `GOOGLE_CLOUD_CPP_DOCUMENT_PROCESSOR_SERVICE_ENDPOINT`, can be used to customize the library's behavior, including overriding endpoint settings."],["Tracing for gRPC calls can be enabled via the `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc` variable, which also benefits from `GOOGLE_CLOUD_CPP_ENABLE_CLOG` being enabled to produce console output."],["Logging can be enabled by setting the `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes` variable, allowing the library to print output to the console."],["The variable `GOOGLE_CLOUD_PROJECT` configures the GCP project for examples and integration tests but does not impact the library's core functionality."]]],[]]