using local redis instead of centralized redis

Earlier we were using local caffine cache and syncing the changes to
centralized redis.
Now we are using local redis only
Assumption is now that we get all the data for particular user key on
one machine.
This will be handled by producer

apps/threat-detection/pom.xml

@@ -95,11 +95,6 @@
             <version>6.4.0.RELEASE</version>
         </dependency>
 
-        <dependency>
-            <groupId>com.github.ben-manes.caffeine</groupId>
-            <artifactId>caffeine</artifactId>
-            <version>2.9.3</version>
-        </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>

apps/threat-detection/src/main/java/com/akto/threat/detection/Main.java

@@ -57,7 +57,9 @@ public static void main(String[] args) {
             .setValueSerializer(Serializer.BYTE_ARRAY)
             .build();
 
-    new MaliciousTrafficDetectorTask(trafficKafka, internalKafka, createRedisClient()).run();
+    RedisClient localRedis = createLocalRedisClient();
+
+    new MaliciousTrafficDetectorTask(trafficKafka, internalKafka, localRedis).run();
     new FlushSampleDataTask(
             sessionFactory, internalKafka, KafkaTopic.ThreatDetection.MALICIOUS_EVENTS)
         .run();
@@ -67,8 +69,8 @@ public static void main(String[] args) {
     new CleanupTask(sessionFactory).run();
   }
 
-  public static RedisClient createRedisClient() {
-    return RedisClient.create(System.getenv("AKTO_THREAT_DETECTION_REDIS_URI"));
+  public static RedisClient createLocalRedisClient() {
+    return RedisClient.create("redis://127.0.0.1:6379");
   }
 
   public static void runMigrations() {

apps/threat-detection/src/main/java/com/akto/threat/detection/cache/RedisCounterCache.java

@@ -0,0 +1,64 @@
+package com.akto.threat.detection.cache;
+
+import io.lettuce.core.RedisClient;
+import io.lettuce.core.api.StatefulRedisConnection;
+
+public class RedisCounterCache implements CounterCache {
+
+  static class Op {
+    private final String key;
+    private final long value;
+
+    public Op(String key, long value) {
+      this.key = key;
+      this.value = value;
+    }
+
+    public String getKey() {
+      return key;
+    }
+
+    public long getValue() {
+      return value;
+    }
+  }
+
+  private final StatefulRedisConnection<String, Long> redis;
+
+  private final String prefix;
+
+  public RedisCounterCache(RedisClient redisClient, String prefix) {
+    this.prefix = prefix;
+    this.redis = redisClient.connect(new LongValueCodec());
+  }
+
+  private String addPrefixToKey(String key) {
+    return new StringBuilder().append(prefix).append("|").append(key).toString();
+  }
+
+  @Override
+  public void increment(String key) {
+    incrementBy(key, 1);
+  }
+
+  @Override
+  public void incrementBy(String key, long val) {
+    redis.async().incrby(addPrefixToKey(key), val);
+  }
+
+  @Override
+  public long get(String key) {
+    return redis.sync().get(addPrefixToKey(key));
+  }
+
+  @Override
+  public boolean exists(String key) {
+    return redis.sync().exists(addPrefixToKey(key)) > 0;
+  }
+
+  @Override
+  public void clear(String key) {
+    redis.async().del(addPrefixToKey(key));
+  }
+
+}

apps/threat-detection/src/main/java/com/akto/threat/detection/tasks/MaliciousTrafficDetectorTask.java

@@ -26,7 +26,7 @@
 import com.akto.test_editor.execution.VariableResolver;
 import com.akto.test_editor.filter.data_operands_impl.ValidationResult;
 import com.akto.threat.detection.actor.SourceIPActorGenerator;
-import com.akto.threat.detection.cache.RedisBackedCounterCache;
+import com.akto.threat.detection.cache.RedisCounterCache;
 import com.akto.threat.detection.constants.KafkaTopic;
 import com.akto.threat.detection.kafka.KafkaProtoProducer;
 import com.akto.threat.detection.smart_event_detector.window_based.WindowBasedThresholdNotifier;
@@ -82,7 +82,7 @@ public MaliciousTrafficDetectorTask(
 
     this.windowBasedThresholdNotifier =
         new WindowBasedThresholdNotifier(
-            new RedisBackedCounterCache(redisClient, "wbt"),
+            new RedisCounterCache(redisClient, "wbt"),
             new WindowBasedThresholdNotifier.Config(100, 10 * 60));
 
     this.internalKafka = new KafkaProtoProducer(internalConfig);