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Posted to users@tomcat.apache.org by "Enke, Dr., Michael" <mi...@wincor-nixdorf.com> on 2015/03/04 19:15:34 UTC
embedded tomcat: Call ChatAnnotation.broadcast(String) from
application?
Hello all,
I start a tomcat from my application and call the static ChatAnnotation.broadcast(String) (from examples)
out of my application.
This is possible but anyhow my application seems to access a "different" broadcast(String) method:
If there are connections to the chat (private static final Set connections), my application sees an empty Set.
How this is possible for a static method / Set? There should be only one static function / static variable in the JVM!?
What is the correct way to achieve the call of broadcast() method?
Thank you,
Michael
WINCOR NIXDORF International GmbH
Sitz der Gesellschaft: Paderborn
Registergericht Paderborn HRB 3507
Geschäftsführer: Eckard Heidloff (Vorsitzender), Dr. Jürgen Wunram (stellv. Vors.), Jens Bohlen, Olaf Heyden
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RE: embedded tomcat: Call ChatAnnotation.broadcast(String) from
application?
Posted by "Enke, Dr., Michael" <mi...@wincor-nixdorf.com>.
>> ... There should be only one static function / static
>> variable in the JVM!?
>
> That statement is incorrect.
>
> There is only one static function / variable per class instance.
>
> A class is uniquely identified by its name AND class loader.
>
> Hence in a multiple class-loader environment like a Servlet container
> (each webapp has its own class loader) you can have multiple classes
> with the same name but different class loaders.
>
>Mark
Many thanks Mark, for this fundamental insight. That did the trick!
Michael
WINCOR NIXDORF International GmbH
Sitz der Gesellschaft: Paderborn
Registergericht Paderborn HRB 3507
Geschäftsführer: Eckard Heidloff (Vorsitzender), Dr. Jürgen Wunram (stellv. Vors.), Jens Bohlen, Olaf Heyden
Vorsitzender des Aufsichtsrats: Dr. Alexander Dibelius
Steuernummer: 339/5884/0020 - Ust-ID Nr.: DE812927716 - WEEE-Reg.-Nr. DE44477193
Diese E-Mail enthält vertrauliche Informationen.
Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben,
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please notify the sender immediately and destroy this e-mail.
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Re: embedded tomcat: Call ChatAnnotation.broadcast(String) from application?
Posted by Mark Thomas <ma...@apache.org>.
On 04/03/2015 18:15, Enke, Dr., Michael wrote:
> Hello all, I start a tomcat from my application and call the static
> ChatAnnotation.broadcast(String) (from examples) out of my
> application. This is possible but anyhow my application seems to
> access a "different" broadcast(String) method: If there are
> connections to the chat (private static final Set connections), my
> application sees an empty Set. How this is possible for a static
> method / Set? There should be only one static function / static
> variable in the JVM!?
That statement is incorrect.
There is only one static function / variable per class instance.
A class is uniquely identified by its name AND class loader.
Hence in a multiple class-loader environment like a Servlet container
(each webapp has its own class loader) you can have multiple classes
with the same name but different class loaders.
Mark
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