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Migrate KStream to KTable conversion to use toTable() method

Recipe IDio.moderne.kafka.streams.MigrateKStreamToTable
Artifactio.moderne.recipe:rewrite-kafka

In Kafka Streams 2.5, a new toTable() method was added to simplify converting a KStream to a KTable. This recipe replaces the manual aggregation pattern .groupByKey().reduce((oldVal, newVal) -> newVal) with the more concise .toTable() method.

Single recipeProprietary

Usage

This recipe has no required configuration options. You’ll need the Moderne CLI configured before running the command below.

mod run . --recipe io.moderne.kafka.streams.MigrateKStreamToTable

If the recipe isn’t available locally, install it with:

mod config recipes jar install io.moderne.recipe:rewrite-kafka:0.7.4

Data tables

Structured output this recipe can produce.

  • Source files that had resultsSource files that were modified by the recipe run.org.openrewrite.table.SourcesFileResults
  • Source files that had search resultsSearch results that were found during the recipe run.org.openrewrite.table.SearchResults
  • Source files that errored on a recipeThe details of all errors produced by a recipe run.org.openrewrite.table.SourcesFileErrors
  • Recipe performanceStatistics used in analyzing the performance of recipes.org.openrewrite.table.RecipeRunStats