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Groups > comp.lang.java.programmer > #21987

Re: "heartbeat" approach

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On Fri, 1 Feb 2013 08:11:14 -0800 (PST), bob smith
<bob@coolfone.comze.com> wrote, quoted or indirectly quoted someone
who said :

>However, that means there could be multiple threads 
writing to one socket.  Do I need to do anything special to have
multiple threads writing to one socket?  Is there a better way?

I wrote some proprietary  code for a large scale security camera
monitoring system perhaps 5 years ago that did just that.  IIRC
sockets are happy to have multiple writers. The alternative would be
to use a queue fed by multiple writers with a single reader.  I don't
recall writing any queue stuff until a year or so ago.

TCP/IP is completely silent unless you are actively transmitting data,
unlike many other protocols.  So if you can to detect a broken link,
you need some artificial traffic. That is why he needs a "heartbeat".
-- 
Roedy Green Canadian Mind Products http://mindprod.com
The first 90% of the code accounts for the first 90% of the development time.
The remaining 10% of the code accounts for the other 90% of the development 
time. 
~ Tom Cargill  Ninety-ninety Law 

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"heartbeat" approach bob smith <bob@coolfone.comze.com> - 2013-02-01 08:11 -0800
  Re: "heartbeat" approach Knute Johnson <nospam@knutejohnson.com> - 2013-02-01 08:40 -0800
  Re: "heartbeat" approach Arne Vajhøj <arne@vajhoej.dk> - 2013-02-01 17:46 -0500
    Re: "heartbeat" approach Robert Klemme <shortcutter@googlemail.com> - 2013-02-02 00:13 +0100
      Re: "heartbeat" approach Arne Vajhøj <arne@vajhoej.dk> - 2013-02-01 18:21 -0500
      Re: "heartbeat" approach Arved Sandstrom <asandstrom2@eastlink.ca> - 2013-02-03 06:51 -0400
  Re: "heartbeat" approach Roedy Green <see_website@mindprod.com.invalid> - 2013-02-01 15:20 -0800

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