This is a minor maintenance release appropriate for all ServiceTalk users that contains several useful improvements and bug fixes. This release is expected to be a "drop-in" replacement for all prior 0.42.X releases. As the ServiceTalk API advances towards a 1.0 release all users are strongly encouraged to update their applications to eliminate all use of deprecated APIs. Existing deprecated APIs will be removed in a future ServiceTalk release without further additional notice. If you encounter problems replacing deprecated usages please create a support issue.

Changes

API Deprecations

• https://github.com/apple/servicetalk/commit/43328e18fb05d7963630e03f00898d54d0d79da8 - gRPC request/response context to pass data between gRPC and HTTP layers (#2311)
  • Deprecate DefaultGrpcClientMetadata.INSTANCE constant and the same constant in all generated subtypes. Instead, always create a new instance of DefaultGrpcClientMetadata. If the INSTANCE is used, any manual attempt to access newly added request/response context will throw UnsupportedOperationException;
  • In the generated gRPC code, deprecate endpoints that operate with GrpcPayloadWriter. Users should migrate to the new overload that has BlockingStreamingGrpcServerResponse instead of GrpcPayloadWriter;
• https://github.com/apple/servicetalk/commit/5e5b746a059c0fdcfca9cd53cbc816dbfa1e8abc - Deprecate CharSequences.asciiStringIndexOf(...) (#2353)
  • Users should use CharSequences#indexOf(...) instead.

New features

• https://github.com/apple/servicetalk/commit/43328e18fb05d7963630e03f00898d54d0d79da8 - gRPC request/response context to pass data between gRPC and HTTP layers (#2311)
  • No need to use AsyncContext anymore to pass HTTP headers to/from gRPC endpoint.
• https://github.com/apple/servicetalk/commit/40d2f02d6a0723f2d3198bdd59862a4f02f044b8 - HTTP/2 set initial settings (#2341, #2346, #2361)
  • New API to tune any defined HTTP/2 settings parameters and connection flow-control window.
• https://github.com/apple/servicetalk/commit/6b6b162b5e94b212a94c31b183d19d48a5710414 - Introduce IdleTimeoutConnectionFilter as alternative to IDLE_TIMEOUT (#2340)
  • Helps to track idle connections at L7 OSI layer rather than L4.

Bug Fixes

• https://github.com/apple/servicetalk/commit/1681caf079b437a19f0b8542ed6caae18adb430c - HTTP/2 avoid premature connection closure when negotiating via ALPN (#2342)
• https://github.com/apple/servicetalk/commit/f11310c6453e344d2290b4b69cf10cce21abb6ae - AsciiBuffer.indexOf returns incorrect result for 2-bytes characters (#2352)
• https://github.com/apple/servicetalk/commit/2928a29c512b0c20d490fef1368d17271f49409a - Publisher#flatMapMerge allow terminal propagation after invalid demand (#2348)

Improvements

• https://github.com/apple/servicetalk/commit/8efc07a09f1ea8a80527d4dea68537ec36e98dcb - Override toString() for delegating connection (#2335)
• https://github.com/apple/servicetalk/commit/b7b71bc60c2e1e39ce69b5ccd38843687de59dda - Improve DefaultHttp2Settings#toString() (#2347)
• https://github.com/apple/servicetalk/commit/be079c1e40cf90b7c5ca5f83a5851a378d782a28 - Use IdleTimeoutConnectionFilter instead of SocketOption by default (#2349)
• https://github.com/apple/servicetalk/commit/49f5f8f9a871d315aff118cf4af79c37365fd317 - Improve parsing of Set-Cookie headers (#2329)
• https://github.com/apple/servicetalk/commit/9c668f47654463b22805ed1557ec17f702950ec6 - Allow users access payloadBodyInputStream() multiple times (#2355)

Dependencies

• https://github.com/apple/servicetalk/commit/3d8d0e83aec5bab121bb2e31765941cc538c322a - Update Netty 4.1.79 -> 4.1.82 (#2350, #2363)
• https://github.com/apple/servicetalk/commit/4f1dca14d10175a160d3299f88fa4db0443483a7 - Update netty-incubator-transport-native-io_uring 0.0.14 -> 0.0.15 (#2357)
• https://github.com/apple/servicetalk/commit/0e7eb61177733a64acbd4ea0cd39475c8f7fefc3 - Update Jackson 2.13.3 -> 2.13.4 (#2358)

Tests improvements

• https://github.com/apple/servicetalk/commit/ba7e826173dad07c334a87076467ead797005f50 - Validate HTTP/2 messages with malformed headers are rejected (#2359)
• https://github.com/apple/servicetalk/commit/8bc579c0793e3135a53d4b396571b21b9b099913 - Update grpc-java 1.45.1 -> 1.49.0 to test compatibility with the latest release

Thank you

Every idea, review, and bug-report counts and so we thought it is worth mentioning those who helped in this area. Please report any unintended omission.

@chrisvest @idelpivnitskiy @Scottmitch @tkountis