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::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 2025-04-17 UTC."],[[["This document lists available versions of the Eventarc C++ library, ranging from version 2.11.0 up to the latest release candidate, 2.37.0-rc."],["The Eventarc C++ library's behavior can be configured using environment variables, or directly in code, with environment variables proving particularly useful for troubleshooting."],["Endpoint overrides can be configured via environment variables such as `GOOGLE_CLOUD_CPP_EVENTARC_ENDPOINT` and `GOOGLE_CLOUD_CPP_PUBLISHER_ENDPOINT` for controlling connections to Eventarc services."],["Tracing for gRPC calls is enabled with `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, and additional options can be set through `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`, while logging is controlled via `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes`."],["The environment variable `GOOGLE_CLOUD_PROJECT` is used in examples and integration tests for setting the GCP project, but does not affect the actual functioning of the library."]]],[]]
