JAVAPNS who used to write server-side connection apns not?

There are several issues not quite understand, every time I send push messages should re-establish socket connections it? Previously established good socket can remain connected it?
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Nobody knows what?
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o () ��)) o Well there is no one ah. . . . .
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To a well-wishers chanting. . . . . .
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You can reuse the previous SOCKET is long connection
You can refer to http://www.raywenderlich.com/3525/apple-push-notification-services-tutorial-part-2
The PHP push.php start () method
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Apple servers recommend using a pooled connection up to
15 concurrent persistent connections to the gateways.
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Do not understand