docs(showcase): Add developer guide for local server testing and dynamic cert rotation - #14042
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docs(showcase): Add developer guide for local server testing and dynamic cert rotation#14042macastelaz wants to merge 1 commit into
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This pull request introduces a comprehensive developer guide for using the Java Showcase Library for local server testing, along with a reference to it in the main README. The feedback highlights two improvements in the guide's code examples: correcting a non-standard class usage that would cause compilation errors when configuring OpenTelemetry, and refactoring a JUnit 5 exception assertion to use the idiomatic assertThrows instead of a try-catch block with fail().
…mic cert rotation * Add docs/showcase_local_server_testing_guide.md detailing programmatic local Showcase server testing for gRPC plaintext and HTTP/REST configurations. * Document infrastructure verification patterns, including OpenTelemetry tracer configuration and dynamic mTLS certificate rotation with ChannelPool and RefreshingHttpJsonChannel refreshes. * Cross-reference java-showcase/README.md as authoritative for server CLI installation and startup to avoid redundancy. * Include full JUnit 5 integration test recipe with assertThrows error injection verification and troubleshooting matrix. Fixes / Addresses: https://b.corp.google.com/issues/515074892
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Summary
Adds a comprehensive developer guide (
docs/showcase_local_server_testing_guide.md) detailing how to programmatically configure Java client libraries (EchoClient,IdentityClient, etc.) in unit and integration tests against a localgapic-showcaseserver.Highlights
ManagedChannelBuilder::usePlaintext) and HTTP/REST (doNotValidateCertificate) local server setups usingNoCredentialsProvider.ChannelPool/ HTTPRefreshingHttpJsonChanneldynamic certificate rotation testing and transparent retry verification.java-showcase/README.mdfor server binary download and CLI startup to avoid documentation duplication.Fixes / Addresses: https://b.corp.google.com/issues/515074892