Join

Module: join/

Stream joins.

Scope

基于时间窗口的 stream-stream join（当前为 in-memory joiner，适用于测试/简单用例）
支持 INNER/LEFT/RIGHT/FULL_OUTER（部分 join 类型的输出时机见 StreamJoiner 实现）

2. Key Classes

JoinFunction, JoinWindow, JoinType, StreamJoiner

Minimal Sample

import io.github.cuihairu.redis.streaming.join.JoinConfig;
import io.github.cuihairu.redis.streaming.join.JoinWindow;
import io.github.cuihairu.redis.streaming.join.StreamJoiner;

var cfg = JoinConfig.innerJoin(
        (String s) -> s, // left key
        (String s) -> s, // right key
        JoinWindow.ofSize(java.time.Duration.ofSeconds(5))
);

StreamJoiner<String, String, String, String> joiner =
        new StreamJoiner<>(cfg, (l, r) -> l + "+" + r);

joiner.processRight("k1");
var out = joiner.processLeft("k1"); // ["k1+k1"]

References

Design.md