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 2025-03-05 UTC."],[[["This document details environment variables and settings for configuring the behavior of the Eventarc C++ library, which can be useful for troubleshooting."],["The latest version of the Eventarc C++ library is 2.37.0-rc, and the document provides links to documentation for several other versions, ranging from 2.36.0 down to 2.11.0."],["The `GOOGLE_CLOUD_CPP_EVENTARC_ENDPOINT` and `GOOGLE_CLOUD_CPP_PUBLISHER_ENDPOINT` variables allow overriding the default endpoints used by `MakeEventarcConnection()` and `MakePublisherConnection()`, respectively."],["Tracing for gRPC calls can be enabled using `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, and `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes` can turn on logging output in the console."],["`GOOGLE_CLOUD_CPP_TRACING_OPTIONS` can modify gRPC tracing behavior, whereas `GOOGLE_CLOUD_PROJECT` is relevant for examples and integration tests but not library functionality."]]],[]]
