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_STORAGE_TRANSFER_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "storagetransfer.googleapis.com") used by MakeStorageTransferServiceConnection().
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 2025-04-22 UTC."],[[["The latest release candidate version for the Storage Transfer service is 2.37.0-rc, and the page provides links to the documentation for this version and multiple other versions, spanning from 2.11.0 to 2.36.0."],["Environment variables can be used to configure the Storage Transfer service library's behavior, offering a method for troubleshooting issues, in addition to code-based configuration options."],["The `GOOGLE_CLOUD_CPP_STORAGE_TRANSFER_SERVICE_ENDPOINT` variable can override the default endpoint for the Storage Transfer service, which is helpful for connecting to non-standard service locations."],["Tracing and logging of gRPC calls can be enabled through environment variables like `GOOGLE_CLOUD_CPP_ENABLE_TRACING` and `GOOGLE_CLOUD_CPP_ENABLE_CLOG`, allowing detailed insights into the library's operations."],["The environment variable, `GOOGLE_CLOUD_PROJECT`, is used for setting the default project in test environments, but it does not affect the actual library's functionality."]]],[]]
