ich-android/app/src/main/java/com/emato/ich/message/ICHSubscribeClient.java

package com.emato.ich.message;

import android.util.Log;

import com.emato.ich.contant.ICSPConstant;
import com.emato.ich.utils.BaseUtils;
import com.emato.ich.utils.LoggingUtils;

import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.IMqttMessageListener;
import org.eclipse.paho.client.mqttv3.MqttCallback;
import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.MqttMessage;
import org.eclipse.paho.client.mqttv3.MqttTopic;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;

/**
 * 订阅客户端
 */
public class ICHSubscribeClient {

    public static final String TAG = "ICHSubscribeClient";
    public static final String userName = "admin";
    public static final String password = "public";

    private MqttClient client;// 客户端实例
    private MqttTopic topic;// 主题实例
    private MqttMessage message;// 消息


    public static ICHSubscribeClient getInstance(){
        return ICHSubscribeClientInnerClass.ichPublishClient;
    }

    static class ICHSubscribeClientInnerClass{
        public static final ICHSubscribeClient ichPublishClient = new ICHSubscribeClient();
    }


    private ICHSubscribeClient() {
        String clientId = BaseUtils.getClientId() + "_subscribe";
        try {
            Log.i(TAG, "ICHSubscribeClient: 开始创建消息服务器订阅客户端实例!");
            client = new MqttClient(ICSPConstant.MQTT_SERVER_ADDRESS, clientId, new MemoryPersistence());
            Log.i(TAG, "ICHSubscribeClient: 创建消息服务器订阅客户端实例成功!");
        } catch (MqttException e) {
            Log.e(TAG, "ICHSubscribeClient: 创建消息服务器客户端失败!", e);
            LoggingUtils.sendErrorLog("业务异常: 创建消息服务器客户端失败! ", e);
        }
        connect();
    }

    public void connect() {
        Log.i(TAG, "connect: 订阅通知开始连接消息服务器!");
        MqttConnectOptions options = new MqttConnectOptions();
        options.setCleanSession(true);
        options.setUserName(userName);
        options.setPassword(password.toCharArray());
        // 连接超时时间
        options.setConnectionTimeout(30);
        // 设置心跳间隔时间
        options.setKeepAliveInterval(30);
        // TODO 设置连接回调
        client.setCallback(new MqttCallback() {
            @Override
            public void connectionLost(Throwable cause) {
                // TODO 重连
                Log.e(TAG, "connectionLost: cause: ", cause);
            }

            @Override
            public void messageArrived(String topic, MqttMessage message) throws Exception {
                // TODO MQTT服务器成功接收消息后,返回消息并调用此方法
                Log.i(TAG, "messageArrived: topic: " + topic + ", msg: " + message.getId() + "--" + new String(message.getPayload()));
            }

            @Override
            public void deliveryComplete(IMqttDeliveryToken token) {
                // TODO 接收到已经发布的 QoS 1 或 QoS 2 消息的传递令牌时调用
                Log.i(TAG, "deliveryComplete: token---" + token.toString() + "---" + topic.getName());
            }
        });
        try {
            client.connect(options);
            Log.i(TAG, "connect: 连接消息服务器成功!");
        } catch (MqttException e) {
            Log.e(TAG, "connect: 连接消息服务器失败!", e);
            LoggingUtils.sendErrorLog("业务异常: 连接消息服务器失败! ", e);
        }
    }

    public void subscribe(String topicName, IMqttMessageListener iMqttMessageListener) {
        try {
            topic = client.getTopic(topicName);
            Log.i(TAG, "subscribe: 开始消息监听! topicName: " + topicName);
            client.subscribe(topicName, iMqttMessageListener);
        } catch (MqttException e) {
            Log.e(TAG, "subscribe: 消息监听失败! topicName: " + topicName, e);
            LoggingUtils.sendErrorLog("业务异常: 消息监听失败! topicName: " + topicName, e);
        }
    }
}