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_EVENTARC_ENDPOINT=... overrides the EndpointOption (which defaults to "eventarc.googleapis.com") used by MakeEventarcConnection().
GOOGLE_CLOUD_CPP_PUBLISHER_ENDPOINT=... overrides the EndpointOption (which defaults to "eventarcpublishing.googleapis.com") used by MakePublisherConnection().
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"]],[["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 2025-04-17 UTC."],[[["This page details the various versions of the Eventarc C++ library, ranging from the latest release candidate (2.37.0-rc) down to version 2.11.0."],["Environment variables can be employed to configure the library's behavior, offering a troubleshooting method in addition to in-code configurations, notably for overriding endpoints and enabling logging features."],["The `GOOGLE_CLOUD_CPP_EVENTARC_ENDPOINT` and `GOOGLE_CLOUD_CPP_PUBLISHER_ENDPOINT` variables can be used to override the default endpoints for `MakeEventarcConnection()` and `MakePublisherConnection()`, respectively."],["Tracing and logging can be enabled using `GOOGLE_CLOUD_CPP_ENABLE_TRACING` and `GOOGLE_CLOUD_CPP_ENABLE_CLOG`, allowing for detailed monitoring of gRPC calls and program output, and fine tuning with `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`."],["The `GOOGLE_CLOUD_PROJECT` variable can be used in examples and integration tests to configure the GCP project, but this is not a feature that is used in the library itself."]]],[]]
