bowenli86 opened a new pull request #7012: [FLINK-10769] port InMemoryExternalCatalog to java URL: https://github.com/apache/flink/pull/7012 ## What is the purpose of the change In the Flink-Hive integration design, we propose a new `FlinkInMemoryCatalog` (FLINK-10697) for production use, unlink `InMemoryExternalCatalog` which is only used for testing and dev work. `FlinkInMemoryCatalog` will share some part with the existing `InMemoryExternalCatalog`, thus we need to make changes to `InMemoryExternalCatalog`. As discussed with @twalthr , we are moving away from Scala to Java, and we should write all new code/feature in Java to minimize migration efforts. Therefore, we will port `InMemoryExternalCatalog` to java first. This PR only port scala to java with NO feature or behavior change. This is a pre-requisite for FLINK-10697 ## Brief change log port `InMemoryExternalCatalog` and `InMemoryExternalCatalogTest` to java ## Verifying this change This change is already covered by existing tests, such as *InMemoryExternalCatalog*. ## Does this pull request potentially affect one of the following parts: none ## Documentation - Does this pull request introduce a new feature? (no)
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