[jira] [Created] (FLINK-40229) Introduce HttpSinkConfig and wire core sink options via ReadableConfig

["Bharath Reddy Gunapati (Jira)" <ji...@apache.org>]

Bharath Reddy Gunapati created FLINK-40229:
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             Summary: Introduce HttpSinkConfig and wire core sink options via ReadableConfig
                 Key: FLINK-40229
                 URL: https://issues.apache.org/jira/browse/FLINK-40229
             Project: Flink
          Issue Type: Improvement
          Components: Connectors / HTTP
            Reporter: Bharath Reddy Gunapati


HTTP lookup uses {{HttpLookupConfig}} ({{{}Configuration{}}} + {{{}Properties{}}}, serializable) and reads typed options at runtime. HTTP sink still passes {{Properties}} end-to-end; {{ReadableConfig}} is only used for {{url}} and {{{}insert-method{}}}. This causes config drift — for example, {{SINK_REQUEST_TIMEOUT}} is declared as {{ConfigOption<Duration>}} but submitters still read from Properties.

Introduce {{HttpSinkConfig}} mirroring {{{}HttpLookupConfig{}}}. Build it in {{HttpDynamicTableSinkFactory}} and thread it through {{HttpDynamicSink}} → {{HttpSinkBuilder}} → {{HttpSinkInternal}} → request submitters. Wire {{SINK_REQUEST_TIMEOUT}} from {{{}ReadableConfig{}}}. Fix writer thread-pool default mismatch (code default 4, documentation default 1).

Acceptance criteria:
 *  {{HttpSinkConfig}} exists and is serializable
 *  Sink runtime reads request timeout from {{{}ReadableConfig{}}}, not Properties string parsing
 *  Writer thread-pool default matches documentation (1)
 *  Factory registers and validates options wired in this ticket
 *  Existing sink tests pass
 *  New unit tests cover config wiring and serialization

Test plan:
 * {{HttpSinkConfigSerializationTest}} (mirror {{{}HttpLookupConfigSerializationTest{}}})
 * Factory test: valid/invalid {{SINK_REQUEST_TIMEOUT}}
 * Unit test: submitter receives {{Duration}} from config, not Properties
 * Unit test: writer thread-pool default is 1 when option unset
 * Full {{mvn test}} for connector-http module green

 



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