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_SIMULATOR_ENDPOINT=... overrides the EndpointOption (which defaults to "policysimulator.googleapis.com") used by MakeSimulatorConnection().
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 2025-04-23 UTC."],[[["Version 2.37.0-rc is the latest release candidate for the policysimulator, with version 2.36.0 as the most current stable release and a list of versions available going all the way back to 2.15.1."],["Environment variables can be utilized to customize library functionality, particularly when debugging, and can also be set through in-code functions."],["The `GOOGLE_CLOUD_CPP_SIMULATOR_ENDPOINT` environment variable allows users to override the default endpoint used by `MakeSimulatorConnection()`, which is \"policysimulator.googleapis.com\"."],["Tracing for gRPC calls can be activated using `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, which can be combined with `GOOGLE_CLOUD_CPP_ENABLE_CLOG` to output results to the console, if no other logging backend has been configured."],["`GOOGLE_CLOUD_PROJECT` is used to configure the GCP project in examples and integration tests, but will not affect the library itself."]]],[]]
