created TbRedisLwM2MClientStore

@@ -59,7 +59,7 @@ public class TbLwM2mStoreFactory {
 
     @Bean
     private TbLwM2MClientStore clientStore() {
-        return new TbDummyLwM2MClientStore();
+        return isRedis() ? new TbRedisLwM2MClientStore(getConnectionFactory()) : new TbDummyLwM2MClientStore();
     }
 
     @Bean

+/**
+ * Copyright © 2016-2021 The Thingsboard Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.thingsboard.server.transport.lwm2m.server.store;
+
+import org.nustaq.serialization.FSTConfiguration;
+import org.springframework.data.redis.connection.RedisConnectionFactory;
+import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;
+
+public class TbRedisLwM2MClientStore implements TbLwM2MClientStore {
+
+    private static final String CLIENT_EP = "CLIENT#EP#";
+    private final RedisConnectionFactory connectionFactory;
+    private final FSTConfiguration serializer;
+
+    public TbRedisLwM2MClientStore(RedisConnectionFactory redisConnectionFactory) {
+        this.connectionFactory = redisConnectionFactory;
+        this.serializer = FSTConfiguration.createDefaultConfiguration();
+    }
+
+    @Override
+    public LwM2mClient get(String endpoint) {
+        try (var connection = connectionFactory.getConnection()) {
+            byte[] data = connection.get(getKey(endpoint));
+            if (data == null) {
+                return null;
+            } else {
+                return (LwM2mClient) serializer.asObject(data);
+            }
+        }
+    }
+
+    @Override
+    public void put(LwM2mClient client) {
+        byte[] clientSerialized = serializer.asByteArray(client);
+        try (var connection = connectionFactory.getConnection()) {
+            connection.getSet(getKey(client.getEndpoint()), clientSerialized);
+        }
+    }
+
+    @Override
+    public void remove(String endpoint) {
+        try (var connection = connectionFactory.getConnection()) {
+            connection.del(getKey(endpoint));
+        }
+    }
+
+    private byte[] getKey(String endpoint) {
+        return (CLIENT_EP + endpoint).getBytes();
+    }
+}