vongosling commented on a change in pull request #687:
URL: https://github.com/apache/rocketmq-externals/pull/687#discussion_r594798004



##########
File path: rocketmq-iot-bridge/pom.xml
##########
@@ -26,6 +26,16 @@ limitations under the License.
     <name>rocketmq-iot-bridge ${project.version}</name>
 
     <dependencies>
+        <dependency>
+            <groupId>org.apache.rocketmq</groupId>

Review comment:
       tools has depends on client module.

##########
File path: 
rocketmq-iot-bridge/src/main/java/org/apache/rocketmq/iot/MQTTBridge.java
##########
@@ -38,36 +38,57 @@
 import 
org.apache.rocketmq.iot.protocol.mqtt.handler.downstream.impl.MqttDisconnectMessageHandler;
 import 
org.apache.rocketmq.iot.protocol.mqtt.handler.downstream.impl.MqttMessageForwarder;
 import 
org.apache.rocketmq.iot.protocol.mqtt.handler.downstream.impl.MqttPingreqMessageHandler;
+import 
org.apache.rocketmq.iot.protocol.mqtt.handler.downstream.impl.MqttPublishMessageHandler;
 import 
org.apache.rocketmq.iot.protocol.mqtt.handler.downstream.impl.MqttSubscribeMessageHandler;
 import 
org.apache.rocketmq.iot.protocol.mqtt.handler.downstream.impl.MqttUnsubscribeMessagHandler;
+import org.apache.rocketmq.iot.storage.message.MessageStore;
+import org.apache.rocketmq.iot.storage.rocketmq.PublishProducer;
+import org.apache.rocketmq.iot.storage.rocketmq.RocketMQPublishProducer;
 import org.apache.rocketmq.iot.storage.subscription.SubscriptionStore;
 import 
org.apache.rocketmq.iot.storage.subscription.impl.InMemorySubscriptionStore;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 public class MQTTBridge {
+    private Logger logger = LoggerFactory.getLogger(MQTTBridge.class);
+
+    private MqttBridgeConfig bridgeConfig;
 
     private ServerBootstrap serverBootstrap;
     private NioEventLoopGroup bossGroup;
     private NioEventLoopGroup workerGroup;
+
     private MessageDispatcher messageDispatcher;
     private SubscriptionStore subscriptionStore;
     private ClientManager clientManager;
     private MqttConnectionHandler connectionHandler;
-    private Logger logger = LoggerFactory.getLogger(MQTTBridge.class);
+    private MessageStore messageStore;
+    private PublishProducer publishProducer;
 
     public MQTTBridge() {
         init();
     }
 
     private void  init() {
-        bossGroup = new 
NioEventLoopGroup(MQTTBridgeConfiguration.threadNumOfBossGroup());
-        workerGroup = new 
NioEventLoopGroup(MQTTBridgeConfiguration.threadNumOfWorkerGroup());
+        this.bridgeConfig = new MqttBridgeConfig();
+
+        subscriptionStore = new InMemorySubscriptionStore();
+        if (bridgeConfig.isEnableRocketMQStore()) {
+            this.publishProducer = new RocketMQPublishProducer(bridgeConfig);

Review comment:
       If disable, where init publishProducer?

##########
File path: 
rocketmq-iot-bridge/src/main/java/org/apache/rocketmq/iot/MQTTBridge.java
##########
@@ -101,20 +124,22 @@ private void registerMessageHandlers() {
 
     public void start() {
         try {
+            publishProducer.start();
             ChannelFuture channelFuture = serverBootstrap.bind().sync();
             channelFuture.channel().closeFuture().sync();
+            logger.info("start the MQTTServer success.");

Review comment:
       It would be better print all necesarry configuration when you starting 
server. Only success or ok is too little significant.

##########
File path: 
rocketmq-iot-bridge/src/main/java/org/apache/rocketmq/iot/MQTTBridge.java
##########
@@ -78,17 +99,19 @@ private void  init() {
                     pipeline.addLast("connection-manager", connectionHandler);
                 }
             });
-        subscriptionStore = new InMemorySubscriptionStore();
-        clientManager = new ClientManagerImpl();
-        messageDispatcher = new MessageDispatcher(clientManager);
-        connectionHandler = new MqttConnectionHandler(clientManager, 
subscriptionStore);
-        registerMessageHandlers();
+
+        logger.info("Mqtt bridge config: " + bridgeConfig);
     }
 
     private void registerMessageHandlers() {
         messageDispatcher.registerHandler(Message.Type.MQTT_CONNECT, new 
MqttConnectMessageHandler(clientManager));
         messageDispatcher.registerHandler(Message.Type.MQTT_DISCONNECT, new 
MqttDisconnectMessageHandler(clientManager));
-        messageDispatcher.registerHandler(Message.Type.MQTT_PUBLISH, new 
MqttMessageForwarder(subscriptionStore));
+        if (bridgeConfig.isEnableRocketMQStore()) {
+            messageDispatcher.registerHandler(Message.Type.MQTT_PUBLISH, new 
MqttPublishMessageHandler(messageStore, publishProducer));
+        } else {
+            // TODO: mqtt cluster inner forwarder

Review comment:
       I'd like to see implementation while not too many todo :)

##########
File path: 
rocketmq-iot-bridge/src/main/java/org/apache/rocketmq/iot/protocol/mqtt/handler/downstream/impl/MqttPublishMessageHandler.java
##########
@@ -26,26 +27,52 @@
 import org.apache.rocketmq.iot.protocol.mqtt.handler.MessageHandler;
 import org.apache.rocketmq.iot.storage.message.MessageStore;
 import org.apache.rocketmq.iot.common.util.MessageUtil;
+import org.apache.rocketmq.iot.storage.rocketmq.PublishProducer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class MqttPublishMessageHandler implements MessageHandler {
+    private Logger log = 
LoggerFactory.getLogger(MqttSubscribeMessageHandler.class);
 
     private MessageStore messageStore;
+    private PublishProducer publishProducer;
 
-    public MqttPublishMessageHandler(MessageStore messageStore) {
+    public MqttPublishMessageHandler(MessageStore messageStore, 
PublishProducer publishProducer) {
         this.messageStore = messageStore;
+        this.publishProducer = publishProducer;
     }
 
     @Override public void handleMessage(Message message) {
         Client client = message.getClient();
         MqttPublishMessage publishMessage = (MqttPublishMessage) 
message.getPayload();
-        messageStore.put(message);
-        int qos = 
MessageUtil.actualQos(publishMessage.fixedHeader().qosLevel().value());
-        if (qos == MqttQoS.AT_LEAST_ONCE.value()) {
-            MqttPubAckMessage pubAckMessage = 
MessageUtil.getMqttPubackMessage(publishMessage);
-            client.getCtx().writeAndFlush(pubAckMessage);
-        } else if (qos == MqttQoS.EXACTLY_ONCE.value()) {
-            MqttMessage pubrecMessage = 
MessageUtil.getMqttPubrecMessage(publishMessage);
-            client.getCtx().writeAndFlush(pubrecMessage);
+
+        try {
+            publishProducer.send(publishMessage, client);
+        } catch (Exception e) {
+            log.error("send msg to rocketMQ failed. clientId:" + 
client.getId(), e);
+        }
+
+        // TODO: qos1, qos2

Review comment:
       ?

##########
File path: 
rocketmq-iot-bridge/src/main/java/org/apache/rocketmq/iot/MQTTBridge.java
##########
@@ -38,36 +38,57 @@
 import 
org.apache.rocketmq.iot.protocol.mqtt.handler.downstream.impl.MqttDisconnectMessageHandler;
 import 
org.apache.rocketmq.iot.protocol.mqtt.handler.downstream.impl.MqttMessageForwarder;
 import 
org.apache.rocketmq.iot.protocol.mqtt.handler.downstream.impl.MqttPingreqMessageHandler;
+import 
org.apache.rocketmq.iot.protocol.mqtt.handler.downstream.impl.MqttPublishMessageHandler;
 import 
org.apache.rocketmq.iot.protocol.mqtt.handler.downstream.impl.MqttSubscribeMessageHandler;
 import 
org.apache.rocketmq.iot.protocol.mqtt.handler.downstream.impl.MqttUnsubscribeMessagHandler;
+import org.apache.rocketmq.iot.storage.message.MessageStore;
+import org.apache.rocketmq.iot.storage.rocketmq.PublishProducer;
+import org.apache.rocketmq.iot.storage.rocketmq.RocketMQPublishProducer;
 import org.apache.rocketmq.iot.storage.subscription.SubscriptionStore;
 import 
org.apache.rocketmq.iot.storage.subscription.impl.InMemorySubscriptionStore;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 public class MQTTBridge {
+    private Logger logger = LoggerFactory.getLogger(MQTTBridge.class);
+
+    private MqttBridgeConfig bridgeConfig;
 
     private ServerBootstrap serverBootstrap;
     private NioEventLoopGroup bossGroup;
     private NioEventLoopGroup workerGroup;
+
     private MessageDispatcher messageDispatcher;
     private SubscriptionStore subscriptionStore;
     private ClientManager clientManager;
     private MqttConnectionHandler connectionHandler;
-    private Logger logger = LoggerFactory.getLogger(MQTTBridge.class);
+    private MessageStore messageStore;
+    private PublishProducer publishProducer;
 
     public MQTTBridge() {
         init();
     }
 
     private void  init() {
-        bossGroup = new 
NioEventLoopGroup(MQTTBridgeConfiguration.threadNumOfBossGroup());
-        workerGroup = new 
NioEventLoopGroup(MQTTBridgeConfiguration.threadNumOfWorkerGroup());
+        this.bridgeConfig = new MqttBridgeConfig();
+
+        subscriptionStore = new InMemorySubscriptionStore();

Review comment:
       default InMemory subscription?




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