MqttClient-brokerUrl: String-clientId: String-mqttClient: MqttClient+MqttClient(brokerUrl: String, clientId: String)+connect(options: MqttConnectOptions) : void+disconnect() : voidMqttConnectOptions-maxPacketSize: int+setMaxPacketSize(maxPacketSize: int) : void 在上面的类图中,我们定义了一个Mqtt...
connection parametersNetworknetwork_stack;// MQTT network stackTimerping_timer;// MQTT ping timerTimerreconnect_delay_timer;// MQTT reconnect delay timerSubTopicHandlesub_handles[MAX_MESSAGE_HANDLERS];// subscription handle arraycharhost_addr[HOST_STR_LENGTH];#ifdef AUTH_MODE_CERTcharcert_file_path[F...
512-KB max message size. Connect to IoT Hub A device can use the MQTT protocol to connect to an IoT hub using one of the following options: The Azure IoT device SDKs. The MQTT protocol directly. Many corporate and educational firewalls block the MQTT port (TCP port 8883). If you can...
int completeMessageSize = result + 1 + read; if (completeMessageSize > _maxMessageSize) throw new DecoderException("Message is too big: " + completeMessageSize); value = result; return true; } //static int DecodeRemainingLength(IByteBuffer buffer) //{ // byte encodedByte; // var multipl...
setPullBatchSize(32); 增加消费者监听器每次处理消息的最大数量 // 设置每批最多消费10条消息,默认是1 consumer.setConsumeMessageBatchMaxSize(10); 修改生产者失败重试配置 减少生产者发送消息失败重试次数,也可以减少消息积压问题。 DefaultMQProducer producer = new DefaultMQProducer("ProducerGroupName"); ...
diskBackedMessageBufferSettings:maxSize:"1G" 有关存储提供程序的注意事项 请考虑所选存储提供程序的行为。 例如,使用rancher.io/local-path等提供程序时。 如果提供程序不支持限制,则填充卷会占用节点的磁盘空间。 这可能会导致 Kubernetes 将节点和所有关联的 Pod 标记为运行不正常。 了解存储提供程序在此类...
Specify whether the will message is a retained message. Defaults to false. This must be used in conjunction with--will-topic. --will-payload Specify the application message that will be stored by the broker and sent out if this client disconnects unexpectedly. This must be use...
var message =newMqttApplicationMessage() { Topic ="testTopic", Payload = Encoding.UTF8.GetBytes("hello seven") }; server.PublishAsync(message); 查询客户端状态 var list = server.GetClientStatusAsync().Result; 获取会话信息 var sessions = server.GetSessionStatusAsync().Result; ...
max_payload_size = 1MB ## 过期时间, 0 表示永不过期 ## 单位: h 小时; m 分钟; s 秒。如 60m 表示 60 分钟retainer.expiry_interval = 0 测试保留消息 可以通过DashBoard -> 工具 -> websocket 来模拟保留消息的实现以及效果 1.首先去新建一个保留消息(图1), 然后订阅. 查看接收到的消息(图2) ...
For example, when the number of our MQTT client connections exceeds 65535, we usually need to adjust parameters such as fs.file-max to increase the maximum number of file descriptors that EMQX can open. When the message throughput is large, we may need to adjust the size settings of the ...