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app 息屏后连接会断开，需要深入研究一下 - 用户反馈 - 清泛IT社区，为创新赋能！
如题，tcp，蓝牙，mqtt 等连接都会断开。
有办法避免吗？
重连策略有效解决吗？
UrsPahoMqttClient心跳问题解决——Paho底层已自动处理，设好KeepAlive就行...
...对 keepAliveSeconds 就行，不用自己实现。底层就是定时往 TCP 发两个字节：0xC0 0x00（PingReq），服务端回 0xD0 0x00（PingResp）。
一句话总结
UrsPahoMqttClient 的 Connect 块传 keepAliveSeconds=60，心跳 Paho 自动搞定，不需要自己写 PingReq 代...
When to use actors instead of messaging solutions such as WebSphere MQ or Tibco Rendezvous?
...
Akka-Camel would be a better example than ZeroMQ - ZeroMQ is a direct tcp to tcp communication (hence zero - there is no message queue).
With AkkaCamel you can abstract away the queue and produce/consume messages direct from an actor without any code to deal with the message queue message push...
How to stop and restart memcached server?
... is currently runing:
sudo ps -e | grep memcached
And you can check the TCP or UDP ports if something (e.g. Memcache) is listening to it:
netstat -ap | grep TheChosenPort#
netstat -ap | grep 11211
For some Linuxes you need to change your commands like:
sudo /etc/init.d/memcached start
sudo /e...
How do I do a HTTP GET in Java? [duplicate]
...
Technically you could do it with a straight TCP socket. I wouldn't recommend it however. I would highly recommend you use Apache HttpClient instead. In its simplest form:
GetMethod get = new GetMethod("http://httpcomponents.apache.org");
// execute method and handle a...
What browsers support HTML5 WebSocket API?
... Node.js)
Understands multiple network protocols out of the box including: TCP, SSL, UDP, HTTP, HTTPS, Websockets, SockJS as fallback for WebSockets
Pusher.com is a Websocket cloud service accessible through a REST API.
DotCloud cloud platform supports Websockets, and Java (Jetty Servlet Containe...
Excel RTD(Excel Real-Time Data)实时刷新数据技术 - C/C++ - 清泛网 - 专注C/C++及内核技术
...，DisconnectData将被调用，在这里，可以释放对这个主题的监控，并不再为其获取新数据。
Heartbeat
确定RTD Server是不是依然可用，0和负数代表不可用，1代表可用。Excel会调用此方法确定服务是否断连。
RefreshData(TopicCount)
TopicCount...
App Inventor 2 UrsAI2UDP 拓展 - UDP广播通信协议 · App Inventor 2 中文网
...向 LAN 中的设备发送数据是可行的，而反过来则不行。
TCP 也是如此。如果智能手机仅连接到蜂窝网络，则只能从智能手机建立连接。LAN 中的设备必须充当服务器，等待传入的连接请求。智能手机充当客户端，即它发起连接。建...
unable to start mongodb local server
...rt (27017)
command:
sudo netstat -tulpn | grep :27017
Output will be:
tcp 0 0 0.0.0.0:27017 0.0.0.0:*
LISTEN 6432/mongod
In my case "6432" is the pid, it may be different in your case.
Then kill that process using following command:
sudo kill <pid>
Thats ...
Linux日志管理Rsyslog入门 - C/C++ - 清泛网 - 专注IT技能提升
...你想测试Rsyslog性能如何的话，可以考虑使用官方提供的tcpflood。
实例演示
在我们动手之前，有必要了解一下Rsyslog的工作流程，说起来非常简单：首先数据通过输入模块进入主队列，然后经由过滤条件分解到各个子队列，最后...