We do this quite regularily - our way is "long polling":
- From the client, start an async poll request
- On the server, just keep this poll request waiting for e.g. 30secs (send a \0 or a blank every couple of seconds, if you need really long times)
- When the database is updated, create some sort of event on the server side
- When such an event is detected by a long-poll handler, write the resulting client notification and end the request
- On the client, when an asyn poll ends, check it for notifications, work on them, then start the next long poll
manpreet![Tuteehub forum best answer]()
Best Answer
2 years ago
I have a kind of application that must query a db at periodic intervals..I want to use push technology such that when the database is updated, the server sends data to the client..How is it possible to implement that ?