解析IoTDA物联网平台的可扩展性：支持上百万设备连接的能力【玩转华为云】

plaintextCopy code// 服务节点类
class ServerNode {
  constructor(nodeId) {
    this.nodeId = nodeId;
    this.devices = {}; // 存储连接到该节点的设备信息
  }
  
  connectDevice(deviceId) {
    // 处理设备连接
    this.devices[deviceId] = {
      deviceId,
      connectedAt: Date.now()
    };
  }
  
  sendData(deviceId, data) {
    // 处理设备发送的数据
    const device = this.devices[deviceId];
    if (device) {
      // 执行数据处理逻辑
      console.log(`Node ${this.nodeId}: Received data from device ${device.deviceId}`);
      console.log(data);
    }
  }
  
  disconnectDevice(deviceId) {
    // 处理设备断开连接
    delete this.devices[deviceId];
  }
}
// 主控制器类
class Controller {
  constructor() {
    this.nodes = {}; // 存储所有的服务节点信息
  }
  
  addNode(nodeId) {
    // 添加服务节点
    this.nodes[nodeId] = new ServerNode(nodeId);
  }
  
  removeNode(nodeId) {
    // 移除服务节点
    delete this.nodes[nodeId];
  }
  
  getNode(deviceId) {
    // 根据设备ID获取对应的服务节点
    const nodeIds = Object.keys(this.nodes);
    const index = Math.abs(deviceId.hashCode()) % nodeIds.length;
    return this.nodes[nodeIds[index]];
  }
  
  connectDevice(deviceId) {
    // 处理设备连接请求
    const node = this.getNode(deviceId);
    if (node) {
      node.connectDevice(deviceId);
    }
  }
  
  sendData(deviceId, data) {
    // 处理设备发送的数据
    const node = this.getNode(deviceId);
    if (node) {
      node.sendData(deviceId, data);
    }
  }
  
  disconnectDevice(deviceId) {
    // 处理设备断开连接
    const node = this.getNode(deviceId);
    if (node) {
      node.disconnectDevice(deviceId);
    }
  }
}
// 使用示例
const controller = new Controller();
// 添加服务节点
controller.addNode('Node1');
controller.addNode('Node2');
controller.addNode('Node3');
// 模拟设备连接
controller.connectDevice('Device1'); // 连接到Node1
controller.connectDevice('Device2'); // 连接到Node2
controller.connectDevice('Device3'); // 连接到Node3
// 模拟设备发送数据
controller.sendData('Device1', 'Data from Device1'); // Node1收到设备1的数据
controller.sendData('Device2', 'Data from Device2'); // Node2收到设备2的数据
controller.sendData('Device3', 'Data from Device3'); // Node3收到设备3的数据
// 模拟设备断开连接
controller.disconnectDevice('Device1'); // 设备1断开连接，从Node1移除

pythonCopy codefrom flask import Flask, request
import json
app = Flask(__name__)
# 模拟设备数据库
devices = {}
@app.route('/connect', methods=['POST'])
def connect_device():
    device_id = request.json['device_id']
    if device_id not in devices:
        devices[device_id] = {"status": "connected"}
        return "Device {} connected".format(device_id)
    return "Device already connected"
@app.route('/send_data', methods=['POST'])
def send_data():
    device_id = request.json['device_id']
    if device_id in devices:
        data = request.json['data']
        # 处理数据逻辑，比如存储数据到数据库或进行其他操作
        print("Received data from device {}: {}".format(device_id, data))
        return "Data received and processed successfully"
    return "Device not connected"
@app.route('/disconnect', methods=['POST'])
def disconnect_device():
    device_id = request.json['device_id']
    if device_id in devices:
        del devices[device_id]
        return "Device {} disconnected".format(device_id)
    return "Device not connected"
if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000)