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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 OverridesGOOGLE_CLOUD_CPP_ADAPTATION_ENDPOINT=...
overrides the EndpointOption
(which defaults to "speech.googleapis.com") used by MakeAdaptationConnection()
.GOOGLE_CLOUD_CPP_SPEECH_ENDPOINT=...
overrides the EndpointOption
(which defaults to "GOOGLE_CLOUD_CPP_SPEECH_ENDPOINT=...
overrides the EndpointOption
(which defaults to "speech.googleapis.com") used by MakeSpeechConnection()
.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.
google::cloud::LoggingComponentsOption
GOOGLE_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.
google::cloud::GrpcTracingOptionsOption
GOOGLE_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.
GOOGLE_CLOUD_PROJECT=...
: is used in examples and integration tests to configure the GCP project. This has no effect in the library.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-08-14 UTC.
[[["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 2025-08-14 UTC."],[[["This page documents the different versions of the C++ Speech library, listing versions from 2.37.0-rc (latest) down to 2.11.0."],["Environment variables are crucial for configuring the behavior of the C++ Speech library and are especially useful for troubleshooting."],["`GOOGLE_CLOUD_CPP_ADAPTATION_ENDPOINT` and `GOOGLE_CLOUD_CPP_SPEECH_ENDPOINT` environment variables can be used to override the default endpoints for the `MakeAdaptationConnection()` and `MakeSpeechConnection()` functions, respectively."],["Tracing for gRPC calls can be enabled via `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, and the output can be configured by setting `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`."],["Logging can be enabled by setting `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes`, allowing the logging infrastructure to print to the program's console."]]],[]]
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