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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_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::TracingComponentsOption
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 document provides a comprehensive list of available versions for the C++ Speech library, ranging from version 2.11.0 up to the latest release candidate, 2.37.0-rc."],["The library's behavior can be configured using various environment variables, offering flexibility for troubleshooting and customization."],["`GOOGLE_CLOUD_CPP_SPEECH_ENDPOINT` allows users to override the default endpoint for speech connections, directing it away from the default \"speech.googleapis.com\"."],["Tracing and logging for gRPC calls can be enabled using `GOOGLE_CLOUD_CPP_ENABLE_TRACING`, while `GOOGLE_CLOUD_CPP_ENABLE_CLOG` enables logging output, and `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` can modify tracing behavior."],["`GOOGLE_CLOUD_PROJECT` can be used to configure the GCP project in examples and integration tests."]]],[]]
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