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Re: Tomcat Multi-Threading

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Date Thu, 31 Jan 2013 08:47:47 +0000
From lipska the kat <"nospam at neversurrender dot co dot uk">
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Subject Re: Tomcat Multi-Threading
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On 31/01/13 03:21, Arne Vajhøj wrote:
> On 1/30/2013 5:48 PM, Lew wrote:
>> lipska the kat wrote:
>>> Lew wrote:

[snip]

> What we are skeptical about is you claim that all Java apps
> are multi threaded. That seems to be based on a rather unsual
> definition of multi threaded.

I think this is the point. What exactly is a multi-threaded application.

The OP asked a question re Tomcat

When you write a web app you have no conventional Java entry point 
(public static void main(String[] args), you are actually extending the 
server. IIRC the Tomcat docs explicitly advise against instantiating new 
threads. I don't think that anyone would argue against the fact that 
*Tomcat* is a multi-threaded application. Does this make your web-app 
multi-threaded ... Well yes it does but only as a *side effect* of the 
way the container manages multiple requests for the same resource, if 
you extend a multi-threaded application then by implication your 
application is multi-threaded.

That's my view of things anyway.

Applications with a single public static void main(String args[]) entry 
point are different. If you don't explicitly create new Threads then I 
don't think you would call your application multi-threaded. The fact the 
the JVM uses multiple threads to do houskeeping tasks is an 
implementation detail. The clincher is that the JVM isn't a Java 
application (in the way that Tomcat is). There is a difference of course 
between green and native threads but that discussion is beyond the scope 
of this document :-)

Or maybe you disagree

lipska

-- 
Lipska the Kat©: Troll hunter, sandbox destroyer
and farscape dreamer of Aeryn Sun

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Thread

Tomcat Multi-Threading zigzagdna@yahoo.com - 2013-01-29 17:59 -0800
  Re: Tomcat Multi-Threading Arne Vajhøj <arne@vajhoej.dk> - 2013-01-29 21:21 -0500
    Re: Tomcat Multi-Threading zigzagdna@yahoo.com - 2013-01-29 19:48 -0800
  Re: Tomcat Multi-Threading Lew <lewbloch@gmail.com> - 2013-01-29 18:31 -0800
    Re: Tomcat Multi-Threading Arne Vajhøj <arne@vajhoej.dk> - 2013-01-29 21:39 -0500
      Re: Tomcat Multi-Threading Lew <lewbloch@gmail.com> - 2013-01-29 22:54 -0800
        Re: Tomcat Multi-Threading Arne Vajhøj <arne@vajhoej.dk> - 2013-01-30 22:09 -0500
      Re: Tomcat Multi-Threading Magnus Warker <magnus@mailinator.com> - 2013-01-30 09:34 +0100
        Re: Tomcat Multi-Threading Lew <lewbloch@gmail.com> - 2013-01-30 08:28 -0800
          Re: Tomcat Multi-Threading Magnus Warker <magnus@mailinator.com> - 2013-01-30 18:04 +0100
            Re: Tomcat Multi-Threading jlp <jlp@jlp.com> - 2013-01-30 18:44 +0100
            Re: Tomcat Multi-Threading Lew <lewbloch@gmail.com> - 2013-01-30 09:49 -0800
              Re: Tomcat Multi-Threading Arne Vajhøj <arne@vajhoej.dk> - 2013-01-30 22:17 -0500
              Re: Tomcat Multi-Threading Magnus Warker <magnus@mailinator.com> - 2013-02-01 18:33 +0100
                Re: Tomcat Multi-Threading Lew <lewbloch@gmail.com> - 2013-02-01 11:23 -0800
                Re: Tomcat Multi-Threading Arne Vajhøj <arne@vajhoej.dk> - 2013-02-01 17:36 -0500
                Re: Tomcat Multi-Threading Magnus Warker <magnus@mailinator.com> - 2013-02-03 07:17 +0100
          Re: Tomcat Multi-Threading lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-01-30 17:49 +0000
            Re: Tomcat Multi-Threading zigzagdna@yahoo.com - 2013-01-30 11:29 -0800
              Re: Tomcat Multi-Threading Leif Roar Moldskred <leifm@dimnakorr.com> - 2013-01-30 14:30 -0600
                Re: Tomcat Multi-Threading Arne Vajhøj <arne@vajhoej.dk> - 2013-01-30 22:00 -0500
              Re: Tomcat Multi-Threading Arne Vajhøj <arne@vajhoej.dk> - 2013-01-30 21:59 -0500
            Re: Tomcat Multi-Threading Lew <lewbloch@gmail.com> - 2013-01-30 14:48 -0800
              Re: Tomcat Multi-Threading Arne Vajhøj <arne@vajhoej.dk> - 2013-01-30 22:21 -0500
                Re: Tomcat Multi-Threading lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-01-31 08:47 +0000
                Re: Tomcat Multi-Threading Arne Vajhøj <arne@vajhoej.dk> - 2013-02-01 17:39 -0500
          Re: Tomcat Multi-Threading Arne Vajhøj <arne@vajhoej.dk> - 2013-01-30 22:12 -0500
  Re: Tomcat Multi-Threading lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-01-30 08:51 +0000

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