feat(jedis-compatibility): Add JedisPubSub callback support for dynamic subscriptions

[prashanna-frsh]

Overview

Support Jedis-style JedisPubSub callback listeners in the compatibility layer to enable full PubSub functionality with message handling.

Background

PR #5286 adds basic PubSub commands (publish, pubsubChannels, pubsubNumSub, pubsubNumPat) to the Jedis compatibility layer. However, the subscribe/unsubscribe methods with JedisPubSub callbacks are not yet implemented.

Requested Feature

Implement JedisPubSub and BinaryJedisPubSub callback support to match the Jedis API:

JedisPubSub jedisPubSub = new JedisPubSub() {
    @Override
    public void onMessage(String channel, String message) {
        // Handle message
    }
    
    @Override
    public void onSubscribe(String channel, int subscribedChannels) {
        // Handle subscription
    }
    
    @Override
    public void onUnsubscribe(String channel, int subscribedChannels) {
        // Handle unsubscription
    }
};

jedis.subscribe(jedisPubSub, "channel1", "channel2");

Implementation Considerations

• Map JedisPubSub callbacks to GLIDE's dynamic subscription APIs
• Support both JedisPubSub (String) and BinaryJedisPubSub (byte[]) variants
• Handle pattern subscriptions (psubscribe) and sharded subscriptions (ssubscribe)
• Ensure thread-safety for callback execution
• Consider blocking vs non-blocking subscription models

Related

• PR feat(jedis-compatibility): add pub sub commands jedis layer #5286 (basic PubSub commands)
• Issue (jedis-compatibility): Add PubSub commands support #5285 (parent issue for PubSub support)

Labels

Feature, java