🔖 mqtt client 订阅 IMqttClientMessageListener 添加 onSubscribed 方法。

mica-mqtt-core/src/main/java/net/dreamlu/iot/mqtt/core/client/DefaultMqttClientProcessor.java

@@ -144,7 +144,13 @@ public class DefaultMqttClientProcessor implements IMqttClientProcessor {
 		}
 		paddingSubscribe.onSubAckReceived();
 		clientSession.removePaddingSubscribe(messageId);
-		clientSession.addSubscription(paddingSubscribe.toSubscription());
+		MqttClientSubscription subscription = paddingSubscribe.toSubscription();
+		clientSession.addSubscription(subscription);
+		try {
+			subscription.getListener().onSubscribed(topicFilter, subscription.getMqttQoS());
+		} catch (Throwable e) {
+			logger.error("MQTT Topic:{} subscribed onSubscribed event error.", topicFilter);
+		}
 	}
 
 	@Override

mica-mqtt-core/src/main/java/net/dreamlu/iot/mqtt/core/client/IMqttClientMessageListener.java

@@ -16,6 +16,8 @@
 
 package net.dreamlu.iot.mqtt.core.client;
 
+import net.dreamlu.iot.mqtt.codec.MqttQoS;
+
 import java.nio.ByteBuffer;
 
 /**
@@ -26,6 +28,16 @@ import java.nio.ByteBuffer;
 @FunctionalInterface
 public interface IMqttClientMessageListener {
 
+	/**
+	 * 订阅成功之后的事件
+	 *
+	 * @param topicFilter topicFilter
+	 * @param mqttQoS     MqttQoS
+	 */
+	default void onSubscribed(String topicFilter, MqttQoS mqttQoS) {
+
+	}
+
 	/**
 	 * 监听到消息
 	 *

mica-mqtt-core/src/main/java/net/dreamlu/iot/mqtt/core/client/MqttClient.java

@@ -25,6 +25,7 @@ import org.tio.client.TioClient;
 import org.tio.core.Tio;
 
 import java.nio.ByteBuffer;
+import java.util.Objects;
 import java.util.concurrent.ScheduledThreadPoolExecutor;
 
 /**
@@ -98,6 +99,8 @@ public final class MqttClient {
 	 * @return MqttClient
 	 */
 	public MqttClient subscribe(MqttQoS mqttQoS, String topicFilter, IMqttClientMessageListener listener) {
+		Objects.requireNonNull(topicFilter, "MQTT subscribe topicFilter is null.");
+		Objects.requireNonNull(listener, "MQTT subscribe listener is null.");
 		// 先判断是否已经订阅过，重复订阅，直接跳出
 		boolean subscribed = clientSession.isSubscribed(topicFilter, mqttQoS, listener);
 		if (!subscribed) {