feat(cache): initial redis support

src/main/java/xyz/atnrch/nicko/storage/cache/redis/RedisCache.java

@@ -1,5 +1,8 @@
 package xyz.atnrch.nicko.storage.cache.redis;
 
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import redis.clients.jedis.Jedis;
 import xyz.atnrch.nicko.disguise.ActionResult;
 import xyz.atnrch.nicko.disguise.NickoProfile;
 import xyz.atnrch.nicko.storage.cache.Cache;
@@ -9,23 +12,36 @@ import java.util.Optional;
 import java.util.UUID;
 
 public class RedisCache extends Cache {
+    private final Gson gson = new GsonBuilder().serializeNulls().setPrettyPrinting().create();
+    private RedisCacheProvider provider;
+
     @Override
     public CacheProvider getProvider() {
-        return null;
+        if (provider == null) {
+            provider = new RedisCacheProvider();
+        }
+        return provider;
     }
 
     @Override
     public ActionResult<Void> cache(UUID uuid, NickoProfile profile) {
-        return null;
+        final Jedis jedis = provider.getJedis();
+        jedis.set("nicko:" + uuid.toString(), gson.toJson(profile));
+        return new ActionResult<>();
     }
 
     @Override
     public boolean isCached(UUID uuid) {
-        return false;
+        final Jedis jedis = provider.getJedis();
+        return jedis.exists("nicko:" + uuid.toString());
     }
 
     @Override
     public Optional<NickoProfile> retrieve(UUID uuid) {
-        return Optional.empty();
+        final Jedis jedis = provider.getJedis();
+        // TODO (Ineanto, 5/20/23): Check if cached before because Jedis returns a bulk reply so this is unsafe
+        final String data = jedis.get("nicko:" + uuid.toString());
+        final NickoProfile profile = gson.fromJson(data, NickoProfile.class);
+        return Optional.of(profile);
     }
 }