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Posted to user@struts.apache.org by Nitin Paul Dsilva <Ni...@infosys.com> on 2007/02/01 05:33:40 UTC
RE: Issue with registering/lookup of converters in ConvertUtils
Hi,
Thanks for the reply Thorsten. But the problem here is that such an implementation is already being used. But now we need to support multiple formats for different users who login to the system. Is there any other workaround for it other than copying parts of the implementation?
Will it help if we move onto a higher version of Struts?
Regards,
Nitin
-----Original Message-----
From: Thorsten Schäfer [mailto:Uni@ThorstenSchaefer.de]
Sent: Wednesday, January 31, 2007 10:00 PM
To: 'Struts Users Mailing List'
Subject: RE: Issue with registering/lookup of converters in ConvertUtils
Hi,
> Is there a problem with the registering/lookup of multiple converters
in
> ConvertUtils on a single server instance?
I think this is not possible. The converters are stored in a static
hashmap, so all classes sharing a single classloader have to use the
same converters. I consider this a bad design decision, but I don't
think that there's a workaround but "copying" parts of the
implementation...
Cheers,
Thorsten
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RE: Issue with registering/lookup of converters in ConvertUtils
Posted by un...@thorstenschaefer.de.
Hi,
> I am not able to see the ConvertUtilsBean in the commons-beanutils-1-0.jar
> that I am using. Has this class been added in later versions of Struts?
It's part of beanutils since version 1.7:
http://jakarta.apache.org/commons/beanutils/api/org/apache/commons/beanutils/ConvertUtilsBean.html
> Also, is ConvertUtilsBean a singleton class or can I have multiple
> instances of it?
I haven't used it on my own, but it looks like you may have multiple instances
and this is exactly what you need. You may take a look at:
http://jakarta.apache.org/commons/beanutils/commons-beanutils-1.7.0/docs/api/org/apache/commons/beanutils/package-summary.html#instances
Cheers,
Thorsten
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RE: Issue with registering/lookup of converters in ConvertUtils
Posted by Nitin Paul Dsilva <Ni...@infosys.com>.
Hi Thorsten,
I am not able to see the ConvertUtilsBean in the commons-beanutils-1-0.jar that I am using. Has this class been added in later versions of Struts? Also, is ConvertUtilsBean a singleton class or can I have multiple instances of it? Or if not, can I register multiple converters for say BigDecimal based on locale?
Regards,
Nitin
-----Original Message-----
From: uni@thorstenschaefer.de [mailto:uni@thorstenschaefer.de]
Sent: Thursday, February 01, 2007 2:25 PM
To: Struts Users Mailing List
Subject: RE: Issue with registering/lookup of converters in ConvertUtils
Nitin,
I just took another look into the beanutils classes: there are not only the
static classes (e.g., ConvertUtils), but also corresponding non-static classes
(e.g., ConvertUtilsBean). You could create a Hashmap with Locale as its key and
the ConvertUtilsBean configured with the locale specific converters. If you try
it out, please tell us if it works ;)
Cheers,
Thorsten
Zitat von Nitin Paul Dsilva <Ni...@infosys.com>:
> We too tried with the registering/deregistering of locale specific
> converters. Apart from the bad performance, this will also result in
> interference if the time of lookup that one session performs happens just
> after the registering of the other session's converters.
> We are looking at the option of extending a few of the struts classes which
> are used in this flow with our own implementations to solve this.
> But I just wanted to know if later versions of struts are handling this issue
> or not. I will check with the commons guys regarding this.
>
> Regards,
> Nitin
>
> -----Original Message-----
> From: Thorsten Schäfer [mailto:Uni@ThorstenSchaefer.de]
> Sent: Thursday, February 01, 2007 12:10 PM
> To: 'Struts Users Mailing List'
> Subject: RE: Issue with registering/lookup of converters in ConvertUtils
>
> We had the problem with the latest stable Struts release (I don't know
> if S2 handles the issue). In our implementation, it was ok to stick to a
> single converter - so we did not need a workaround. IMHO, the problem is
> not Struts, but the static nature of beanutils. Maybe you can ask the
> commons guys for a solution!? One possible workaround is to register
> locale specific converters always before they are used - however, this
> is quite ugly and should have a bad performance. Maybe you take a look
> into the implementation and find another workaround.
>
> Cheers,
>
> Thorsten
>
> > -----Original Message-----
> > From: Nitin Paul Dsilva [mailto:Nitin_Dsilva@infosys.com]
> > Sent: Thursday, February 01, 2007 5:34 AM
> > To: Struts Users Mailing List
> > Subject: RE: Issue with registering/lookup of converters in
> ConvertUtils
> >
> >
> > Hi,
> > Thanks for the reply Thorsten. But the problem here is that such an
> > implementation is already being used. But now we need to support
> multiple
> > formats for different users who login to the system. Is there any
> other
> > workaround for it other than copying parts of the implementation?
> >
> >
> > Will it help if we move onto a higher version of Struts?
> >
> > Regards,
> > Nitin
> >
> >
> > -----Original Message-----
> > From: Thorsten Schäfer [mailto:Uni@ThorstenSchaefer.de]
> >
> > Sent: Wednesday, January 31, 2007 10:00 PM
> > To: 'Struts Users Mailing List'
> > Subject: RE: Issue with registering/lookup of converters in
> ConvertUtils
> >
> > Hi,
> >
> > > Is there a problem with the registering/lookup of multiple
> converters
> > in
> > > ConvertUtils on a single server instance?
> > I think this is not possible. The converters are stored in a static
> > hashmap, so all classes sharing a single classloader have to use the
> > same converters. I consider this a bad design decision, but I don't
> > think that there's a workaround but "copying" parts of the
> > implementation...
> >
> > Cheers,
> >
> > Thorsten
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> > For additional commands, e-mail: user-help@struts.apache.org
> >
> >
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RE: Issue with registering/lookup of converters in ConvertUtils
Posted by un...@thorstenschaefer.de.
Nitin,
I just took another look into the beanutils classes: there are not only the
static classes (e.g., ConvertUtils), but also corresponding non-static classes
(e.g., ConvertUtilsBean). You could create a Hashmap with Locale as its key and
the ConvertUtilsBean configured with the locale specific converters. If you try
it out, please tell us if it works ;)
Cheers,
Thorsten
Zitat von Nitin Paul Dsilva <Ni...@infosys.com>:
> We too tried with the registering/deregistering of locale specific
> converters. Apart from the bad performance, this will also result in
> interference if the time of lookup that one session performs happens just
> after the registering of the other session's converters.
> We are looking at the option of extending a few of the struts classes which
> are used in this flow with our own implementations to solve this.
> But I just wanted to know if later versions of struts are handling this issue
> or not. I will check with the commons guys regarding this.
>
> Regards,
> Nitin
>
> -----Original Message-----
> From: Thorsten Schäfer [mailto:Uni@ThorstenSchaefer.de]
> Sent: Thursday, February 01, 2007 12:10 PM
> To: 'Struts Users Mailing List'
> Subject: RE: Issue with registering/lookup of converters in ConvertUtils
>
> We had the problem with the latest stable Struts release (I don't know
> if S2 handles the issue). In our implementation, it was ok to stick to a
> single converter - so we did not need a workaround. IMHO, the problem is
> not Struts, but the static nature of beanutils. Maybe you can ask the
> commons guys for a solution!? One possible workaround is to register
> locale specific converters always before they are used - however, this
> is quite ugly and should have a bad performance. Maybe you take a look
> into the implementation and find another workaround.
>
> Cheers,
>
> Thorsten
>
> > -----Original Message-----
> > From: Nitin Paul Dsilva [mailto:Nitin_Dsilva@infosys.com]
> > Sent: Thursday, February 01, 2007 5:34 AM
> > To: Struts Users Mailing List
> > Subject: RE: Issue with registering/lookup of converters in
> ConvertUtils
> >
> >
> > Hi,
> > Thanks for the reply Thorsten. But the problem here is that such an
> > implementation is already being used. But now we need to support
> multiple
> > formats for different users who login to the system. Is there any
> other
> > workaround for it other than copying parts of the implementation?
> >
> >
> > Will it help if we move onto a higher version of Struts?
> >
> > Regards,
> > Nitin
> >
> >
> > -----Original Message-----
> > From: Thorsten Schäfer [mailto:Uni@ThorstenSchaefer.de]
> >
> > Sent: Wednesday, January 31, 2007 10:00 PM
> > To: 'Struts Users Mailing List'
> > Subject: RE: Issue with registering/lookup of converters in
> ConvertUtils
> >
> > Hi,
> >
> > > Is there a problem with the registering/lookup of multiple
> converters
> > in
> > > ConvertUtils on a single server instance?
> > I think this is not possible. The converters are stored in a static
> > hashmap, so all classes sharing a single classloader have to use the
> > same converters. I consider this a bad design decision, but I don't
> > think that there's a workaround but "copying" parts of the
> > implementation...
> >
> > Cheers,
> >
> > Thorsten
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> > For additional commands, e-mail: user-help@struts.apache.org
> >
> >
> > **************** CAUTION - Disclaimer *****************
> > This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended
> > solely for the use of the addressee(s). If you are not the intended
> > recipient, please notify the sender by e-mail and delete the original
> > message. Further, you are not to copy, disclose, or distribute this
> e-mail
> > or its contents to any other person and any such actions are unlawful.
> > This e-mail may contain viruses. Infosys has taken every reasonable
> > precaution to minimize this risk, but is not liable for any damage you
> may
> > sustain as a result of any virus in this e-mail. You should carry out
> your
> > own virus checks before opening the e-mail or attachment. Infosys
> reserves
> > the right to monitor and review the content of all messages sent to or
> > from this e-mail address. Messages sent to or from this e-mail address
> may
> > be stored on the Infosys e-mail system.
> > ***INFOSYS******** End of Disclaimer ********INFOSYS***
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>
>
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RE: Issue with registering/lookup of converters in ConvertUtils
Posted by Nitin Paul Dsilva <Ni...@infosys.com>.
We too tried with the registering/deregistering of locale specific converters. Apart from the bad performance, this will also result in interference if the time of lookup that one session performs happens just after the registering of the other session's converters.
We are looking at the option of extending a few of the struts classes which are used in this flow with our own implementations to solve this.
But I just wanted to know if later versions of struts are handling this issue or not. I will check with the commons guys regarding this.
Regards,
Nitin
-----Original Message-----
From: Thorsten Schäfer [mailto:Uni@ThorstenSchaefer.de]
Sent: Thursday, February 01, 2007 12:10 PM
To: 'Struts Users Mailing List'
Subject: RE: Issue with registering/lookup of converters in ConvertUtils
We had the problem with the latest stable Struts release (I don't know
if S2 handles the issue). In our implementation, it was ok to stick to a
single converter - so we did not need a workaround. IMHO, the problem is
not Struts, but the static nature of beanutils. Maybe you can ask the
commons guys for a solution!? One possible workaround is to register
locale specific converters always before they are used - however, this
is quite ugly and should have a bad performance. Maybe you take a look
into the implementation and find another workaround.
Cheers,
Thorsten
> -----Original Message-----
> From: Nitin Paul Dsilva [mailto:Nitin_Dsilva@infosys.com]
> Sent: Thursday, February 01, 2007 5:34 AM
> To: Struts Users Mailing List
> Subject: RE: Issue with registering/lookup of converters in
ConvertUtils
>
>
> Hi,
> Thanks for the reply Thorsten. But the problem here is that such an
> implementation is already being used. But now we need to support
multiple
> formats for different users who login to the system. Is there any
other
> workaround for it other than copying parts of the implementation?
>
>
> Will it help if we move onto a higher version of Struts?
>
> Regards,
> Nitin
>
>
> -----Original Message-----
> From: Thorsten Schäfer [mailto:Uni@ThorstenSchaefer.de]
>
> Sent: Wednesday, January 31, 2007 10:00 PM
> To: 'Struts Users Mailing List'
> Subject: RE: Issue with registering/lookup of converters in
ConvertUtils
>
> Hi,
>
> > Is there a problem with the registering/lookup of multiple
converters
> in
> > ConvertUtils on a single server instance?
> I think this is not possible. The converters are stored in a static
> hashmap, so all classes sharing a single classloader have to use the
> same converters. I consider this a bad design decision, but I don't
> think that there's a workaround but "copying" parts of the
> implementation...
>
> Cheers,
>
> Thorsten
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
>
> **************** CAUTION - Disclaimer *****************
> This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended
> solely for the use of the addressee(s). If you are not the intended
> recipient, please notify the sender by e-mail and delete the original
> message. Further, you are not to copy, disclose, or distribute this
e-mail
> or its contents to any other person and any such actions are unlawful.
> This e-mail may contain viruses. Infosys has taken every reasonable
> precaution to minimize this risk, but is not liable for any damage you
may
> sustain as a result of any virus in this e-mail. You should carry out
your
> own virus checks before opening the e-mail or attachment. Infosys
reserves
> the right to monitor and review the content of all messages sent to or
> from this e-mail address. Messages sent to or from this e-mail address
may
> be stored on the Infosys e-mail system.
> ***INFOSYS******** End of Disclaimer ********INFOSYS***
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RE: Issue with registering/lookup of converters in ConvertUtils
Posted by Thorsten Schäfer <Un...@ThorstenSchaefer.de>.
We had the problem with the latest stable Struts release (I don't know
if S2 handles the issue). In our implementation, it was ok to stick to a
single converter - so we did not need a workaround. IMHO, the problem is
not Struts, but the static nature of beanutils. Maybe you can ask the
commons guys for a solution!? One possible workaround is to register
locale specific converters always before they are used - however, this
is quite ugly and should have a bad performance. Maybe you take a look
into the implementation and find another workaround.
Cheers,
Thorsten
> -----Original Message-----
> From: Nitin Paul Dsilva [mailto:Nitin_Dsilva@infosys.com]
> Sent: Thursday, February 01, 2007 5:34 AM
> To: Struts Users Mailing List
> Subject: RE: Issue with registering/lookup of converters in
ConvertUtils
>
>
> Hi,
> Thanks for the reply Thorsten. But the problem here is that such an
> implementation is already being used. But now we need to support
multiple
> formats for different users who login to the system. Is there any
other
> workaround for it other than copying parts of the implementation?
>
>
> Will it help if we move onto a higher version of Struts?
>
> Regards,
> Nitin
>
>
> -----Original Message-----
> From: Thorsten Schäfer [mailto:Uni@ThorstenSchaefer.de]
>
> Sent: Wednesday, January 31, 2007 10:00 PM
> To: 'Struts Users Mailing List'
> Subject: RE: Issue with registering/lookup of converters in
ConvertUtils
>
> Hi,
>
> > Is there a problem with the registering/lookup of multiple
converters
> in
> > ConvertUtils on a single server instance?
> I think this is not possible. The converters are stored in a static
> hashmap, so all classes sharing a single classloader have to use the
> same converters. I consider this a bad design decision, but I don't
> think that there's a workaround but "copying" parts of the
> implementation...
>
> Cheers,
>
> Thorsten
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
>
> **************** CAUTION - Disclaimer *****************
> This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended
> solely for the use of the addressee(s). If you are not the intended
> recipient, please notify the sender by e-mail and delete the original
> message. Further, you are not to copy, disclose, or distribute this
e-mail
> or its contents to any other person and any such actions are unlawful.
> This e-mail may contain viruses. Infosys has taken every reasonable
> precaution to minimize this risk, but is not liable for any damage you
may
> sustain as a result of any virus in this e-mail. You should carry out
your
> own virus checks before opening the e-mail or attachment. Infosys
reserves
> the right to monitor and review the content of all messages sent to or
> from this e-mail address. Messages sent to or from this e-mail address
may
> be stored on the Infosys e-mail system.
> ***INFOSYS******** End of Disclaimer ********INFOSYS***
>
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