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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_ESSENTIAL_CONTACTS_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "essentialcontacts.googleapis.com") used by MakeEssentialContactsServiceConnection().
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 2025-03-21 UTC."],[[["The latest release candidate version for Essential Contacts is 2.37.0-rc, with several prior versions available, ranging from 2.36.0 down to 2.12.0, accessible via their respective links."],["Environment variables allow for customization of the library's behavior, such as `GOOGLE_CLOUD_CPP_ESSENTIAL_CONTACTS_SERVICE_ENDPOINT` to override the default endpoint, useful for troubleshooting."],["Tracing for gRPC calls can be enabled using `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, and additional logging can be displayed on the program's console by setting `GOOGLE_CLOUD_CPP_ENABLE_CLOG`."],["The environment variable `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` can be utilized to modify how gRPC tracing behaves, including formatting choices for output messages and field truncation."],["Setting the environment variable `GOOGLE_CLOUD_PROJECT` is used for configuring the GCP project in examples and integration tests, but it does not influence the library's functionality."]]],[]]
