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Version 2.0.0-beta3

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@jasonkuster jasonkuster released this 23 Mar 21:17
v2.0.0-beta3
48bea87

The Dataflow SDK for Java 2.0.0-beta3 is the third 2.x release of the Dataflow SDK for Java, based on a subset of the Apache Beam code base.

  • Breaking Changes: The Dataflow SDK 2.x for Java releases have a number of breaking changes from the 1.x series of releases and from earlier 2.x beta releases. Please see below for details.
  • Update Incompatibility: The Dataflow SDK 2.x for Java is update-incompatible with Dataflow 1.x. Streaming jobs using a Dataflow 1.x SDK cannot be updated to use a Dataflow 2.x SDK. Additionally, beta releases of 2.x may not be update-compatible with each other or with 2.0.0.

Beta

This is a Beta release of the Dataflow SDK 2.x for Java and includes the following caveats:

  • No API Stability: This release does not guarantee a stable API. The next release in the 2.x series may make breaking API changes that require you to modify your code when you upgrade. API stability guarantees will begin with the 2.0.0 release.
  • Limited Support Timeline: This release is an early preview of the upcoming 2.0.0 release. It’s intended to let you start the eventual transition to the 2.x series as convenient for you. Beta release are supported by the Dataflow service, but obtaining bugfixes and new features will require you to upgrade to a newer release that may have backwards-incompatible changes. Once 2.0.0 is released, you should plan to upgrade from any 2.0.0-betaX releases within 3 months.
  • Documentation and Code Samples: The SDK documentation on the Dataflow site continues to use code samples from the original 1.x SDKs. For the time being, please see the Apache Beam Documentation for background on the APIs in this release.

Updates since 2.0.0-beta2

Version 2.0.0-beta3 is based on a subset of Apache Beam 0.6.0. The most relevant changes in this release for Cloud Dataflow customers include:

  • Changed TextIO to only operate on strings.
  • Changed KafkaIO to specify type parameters explicitly.
  • Renamed factory functions of ToString.
  • Changed Count, Latest, Sample, SortValues transforms.
  • Renamed Write.Bound to Write.
  • Renamed Flatten transform classes.
  • Split GroupByKey.create method into create and createWithFewKeys methods.

Additional breaking changes

Please see the official Dataflow SDK 2.x for Java release notes for an updated list of additional breaking changes and updated information on the Dataflow SDK 2.x for Java releases.

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