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List: omniorb-list
Subject: [omniORB] Antw: Re: How to destroy objects
From: "Stefan Walter" <Stefan.Walter () lisec ! com>
Date: 2013-07-03 9:42:15
Message-ID: 51D42A370200001000049631 () mx1 ! lisec ! com
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Dear Duncan,
I mean how to release the object reference on client side.
Regards,
Stefan
>>>
Von: Duncan Grisby <duncan@grisby.org>
An:Stefan Walter <Stefan.Walter@lisec.com>
CC:<omniorb-list@omniorb-support.com>
Datum: 03.07.2013 13:38
Betreff: Re: [omniORB] How to destroy objects
On Tue, 2013-07-02 at 15:18 +0200, Stefan Walter wrote:
> how do I destroy objects in omniORB which are not longer required.
Can you clarify what you are talking about destroying? There are at
least two things you might mean:
1. On the client side, release the object reference.
2. On the server side, deactivate the object and delete the servant.
In CORBA, those two things are totally separate concerns. Client
object
references are reference counted, and the Echo_var holder
automatically
releases its reference when it goes out of scope.
The lifetime of server-side object activations is completely
unaffected
by whether any clients hold object references. If you want to get rid
of
the server-side objects, you must write server-side code to do so. It
is
common to define a destroy() method in your IDL, for example, so a
client can dispose of an object when it has finished with it. To
deactivate an object, you call deactivate_object on the POA it is
activated within.
In more complex situations, you might want to implement some sort of
evictor or timeout that automatically deactivates objects that are no
longer in use. It all depends upon what you want the semantics to be.
Cheers,
Duncan.
--
-- Duncan Grisby --
-- duncan@grisby.org --
-- http://www.grisby.org --
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<DIV>Dear Duncan,</DIV>
<DIV> </DIV>
<DIV>I mean how to release the object reference on client side.</DIV>
<DIV> </DIV>
<DIV>Regards,</DIV>
<DIV>Stefan<BR><BR>>>> </DIV>
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<TD><STRONG>Von: </STRONG></TD>
<TD>Duncan Grisby <duncan@grisby.org></TD></TR>
<TR vAlign=top>
<TD><STRONG>An:</STRONG></TD>
<TD>Stefan Walter <Stefan.Walter@lisec.com></TD></TR>
<TR vAlign=top>
<TD><STRONG>CC:</STRONG></TD>
<TD><omniorb-list@omniorb-support.com></TD></TR>
<TR vAlign=top>
<TD><STRONG>Datum: </STRONG></TD>
<TD>03.07.2013 13:38</TD></TR>
<TR vAlign=top>
<TD><STRONG>Betreff: </STRONG></TD>
<TD>Re: [omniORB] How to destroy objects</TD></TR></TBODY></TABLE>On Tue, 2013-07-02 \
at 15:18 +0200, Stefan Walter wrote:<BR><BR>> how do I destroy objects in omniORB \
which are not longer required.<BR><BR>Can you clarify what you are talking about \
destroying? There are at<BR>least two things you might mean:<BR><BR>1. On the \
client side, release the object reference.<BR>2. On the server side, deactivate the \
object and delete the servant.<BR><BR>In CORBA, those two things are totally separate \
concerns. Client object<BR>references are reference counted, and the Echo_var holder \
automatically<BR>releases its reference when it goes out of scope.<BR><BR>The \
lifetime of server-side object activations is completely unaffected<BR>by whether any \
clients hold object references. If you want to get rid of<BR>the server-side objects, \
you must write server-side code to do so. It is<BR>common to define a destroy() \
method in your IDL, for example, so a<BR>client can dispose of an object when it has \
finished with it. To<BR>deactivate an object, you call deactivate_object on the POA \
it is<BR>activated within.<BR><BR>In more complex situations, you might want to \
implement some sort of<BR>evictor or timeout that automatically deactivates objects \
that are no<BR>longer in use. It all depends upon what you want the semantics to \
be.<BR><BR>Cheers,<BR><BR>Duncan.<BR><BR>-- <BR>-- Duncan \
Grisby --<BR> -- \
duncan@grisby.org --<BR> -- <A \
href="http://www.grisby.org">http://www.grisby.org</A> \
--<BR><BR><BR><BR></DIV></TD></TR></TBODY></TABLE><BR>
<div>
<font size="1" color="#999999" face="Nimbus Sans \
L">______________________________ </font><font size="1" face="Nimbus Sans \
L"><br></font><font size="1" color="#999999" face="Nimbus Sans L">The \
content of this e-mail is confidential and restricted for the use of the
intended recipient only. If you are not the intended recipient please
inform the sender immediately and delete this e-mail and any attachments.
We cannot accept liability for any damage incurred as a result of
software viruses and advise that you carry out your own virus checks
before opening any attachment.</font><font size="1" face="Nimbus Sans \
L"><br><br></font><font size="1" color="#999999" face="Nimbus Sans \
L">Der
Inhalt dieses E-Mails ist vertraulich und für die alleinige Verwendung
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beabsichtigte Empfänger sind, bitten wir Sie den Absender umgehend zu
informieren und dieses E-Mail samt angeschlossenen Dateien zu löschen.
Wir können keine Haftung für allfällige Schäden \
übernehmen, die aufgrund
von Software-Viren entstehen, und empfehlen Ihnen, selbst Virenprüfungen
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