Fluss supports multiple versions of Apache Flink by providing dedicated modules for each version. The fluss-flink-common module always targets the latest version of Flink, while the fluss-flink-${flink.version} modules depend on both fluss-flink-common and the corresponding Flink version.
Occasionally, Flink's interfaces may change across versions. For example, the class org.apache.flink.api.connector.sink2.WriterInitContext was introduced in Flink v1.19, while older APIs were deprecated or removed. In such cases, we address compatibility issues within the specific fluss-flink-${flink.version} module. This may involve introducing placeholder classes, such as org.apache.flink.api.connector.sink2.WriterInitContext, to ensure successful compilation.