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Posted to users@tomcat.apache.org by Michael-O <19...@gmx.net> on 2012/03/15 21:54:27 UTC
Writing a custom resource factory
Hi folks,
I'd like to write a custom ldap resource factory as same as a data
source factory. The getObjectInstance method shall return
InitialDirContext object. I have written a mock factory and noticed that
the output is cached by Tomcat. So the object is created only once (same
id in Eclipse debugger).
Now I need to verify that the InitialDirContext is still valid (conn
timeout, etc.), same as testOnBorrow with DataSource. I won't have any
reference to it after its creation. This means that I would need to wrap
that object somehow and perform the operation myself?
This is how Tomcat JDBC Pool does.
Is my assumption correct? If yes, I would need to wrap every sing method
defined in DirContext and InitialDirContext.
Thanks,
Mike
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Re: Writing a custom resource factory
Posted by Felix Schumacher <fe...@internetallee.de>.
Am 16.03.2012 09:34, schrieb 1983-01-06@gmx.net:
>> Am 16.03.2012 08:24, schrieb Felix Schumacher:
>> > Am 15.03.2012 21:54, schrieb Michael-O:
>> >> Hi folks,
>> >>
>> >> I'd like to write a custom ldap resource factory as same as a
>> data
>> >> source factory. The getObjectInstance method shall return
>> >> InitialDirContext object. I have written a mock factory and
>> noticed
>> >> that the output is cached by Tomcat. So the object is created
>> only
>> >> once (same id in Eclipse debugger).
>> > I think you can change that behavior, but it will not be necessary
>> in
>> > your case.
>> I have found it. In
>> http://tomcat.apache.org/tomcat-7.0-doc/config/context.html
>> look for "singleton". But I still believe, that you will not need
>> it.
>
> Felix,
>
> I checked that already. I am on Tomcat 6.0.35, so this is not an
> option for me. Although the Tomcat Pool works great since the
> DataSource is created once. It would contradict if the DataSouce and
> its pool would exist several times.
That is why the singleton property defaults to true. That resembles
the behavior of older tomcats.
And as I told you already, you want a singleton created by tomcat and
given
to your application. That singleton/factory can then be used to create
DirContext objects.
Look at the example for JavaBean resources in the documentation.
Felix
>
> I'll will share my implementation idea shortly on the list as soon as
> it works.
>
> Mike
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Re: Writing a custom resource factory
Posted by 19...@gmx.net.
> Am 16.03.2012 08:24, schrieb Felix Schumacher:
> > Am 15.03.2012 21:54, schrieb Michael-O:
> >> Hi folks,
> >>
> >> I'd like to write a custom ldap resource factory as same as a data
> >> source factory. The getObjectInstance method shall return
> >> InitialDirContext object. I have written a mock factory and noticed
> >> that the output is cached by Tomcat. So the object is created only
> >> once (same id in Eclipse debugger).
> > I think you can change that behavior, but it will not be necessary in
> > your case.
> I have found it. In
> http://tomcat.apache.org/tomcat-7.0-doc/config/context.html
> look for "singleton". But I still believe, that you will not need it.
Felix,
I checked that already. I am on Tomcat 6.0.35, so this is not an option for me. Although the Tomcat Pool works great since the DataSource is created once. It would contradict if the DataSouce and its pool would exist several times.
I'll will share my implementation idea shortly on the list as soon as it works.
Mike
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Re: Writing a custom resource factory
Posted by Felix Schumacher <fe...@internetallee.de>.
Am 16.03.2012 08:24, schrieb Felix Schumacher:
> Am 15.03.2012 21:54, schrieb Michael-O:
>> Hi folks,
>>
>> I'd like to write a custom ldap resource factory as same as a data
>> source factory. The getObjectInstance method shall return
>> InitialDirContext object. I have written a mock factory and noticed
>> that the output is cached by Tomcat. So the object is created only
>> once (same id in Eclipse debugger).
> I think you can change that behavior, but it will not be necessary in
> your case.
I have found it. In
http://tomcat.apache.org/tomcat-7.0-doc/config/context.html
look for "singleton". But I still believe, that you will not need it.
Regards
Felix
>>
>> Now I need to verify that the InitialDirContext is still valid (conn
>> timeout, etc.), same as testOnBorrow with DataSource. I won't have
>> any
>> reference to it after its creation. This means that I would need to
>> wrap that object somehow and perform the operation myself?
>> This is how Tomcat JDBC Pool does.
>>
>> Is my assumption correct? If yes, I would need to wrap every sing
>> method defined in DirContext and InitialDirContext.
> If you look at the example, you gave. You will see, that the resource
> created
> a factory for you. That factory manages a pool and creates and
> validates
> connection objects for you.
>
> So, by using
>
> http://tomcat.apache.org/tomcat-7.0-doc/jndi-resources-howto.html#Generic_JavaBean_Resources
> you can easily define a resource, which creates a
> DirContext-factory/pool object.
>
> That factory can be the same for the whole application, if you make
> it thread safe.
>
> The factory-method can than manage the pool and validate each
> DirContext object, before it
> hands it out to you. Just remember to give it back to the
> pool/factory.
>
> Regards
> Felix
>>
>> Thanks,
>>
>> Mike
>>
>>
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>> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
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Re: How to leave this list?
Posted by Konstantin Kolinko <kn...@gmail.com>.
2012/3/16 Purvis Robert (NHS CONNECTING FOR HEALTH) <ro...@nhs.net>:
> Can anyone tell me how to leave this email list? I have tried sending an email to the unsubscribe address, but that has not worked.
Was the mail lost, or there was some specific error message?
There are more detailed instructions here:
http://www.apache.org/foundation/mailinglists.html
If that does not help you can send mail to "list owner" address and he
will unsubscribe you manually.
Best regards,
Konstantin Kolinko
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Re: How to leave this list?
Posted by Konstantin Kolinko <kn...@gmail.com>.
2012/3/16 Purvis Robert (NHS CONNECTING FOR HEALTH) <ro...@nhs.net>:
> I got no error message. I tried about 5 times (just tried again), emailing to users-unsubscribe@tomcat.apache.org as it says in the footer to this list's emails.
Did your message have subject and some text in the body? Otherwise it
could be rejected by spam filter.
Best regards,
Konstantin Kolinko
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Re: How to leave this list?
Posted by Giles Coochey <gi...@coochey.net>.
On 16/03/2012 10:49, Purvis Robert (NHS CONNECTING FOR HEALTH) wrote:
> I got no error message. I tried about 5 times (just tried again), emailing to users-unsubscribe@tomcat.apache.org as it says in the footer to this list's emails.
>
> Rob
>
>
>
Are you sure that you are subscribed with the email that you are
unsubscribing from?
(Sometimes mailforwarding etc... can deceive you on this).
The best approach would be to contact the list owner directly, I'm sure
they're not intending to send you emails if they knew you didn't want them.
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RE: How to leave this list?
Posted by "Purvis Robert (NHS CONNECTING FOR HEALTH)" <ro...@nhs.net>.
I got no error message. I tried about 5 times (just tried again), emailing to users-unsubscribe@tomcat.apache.org as it says in the footer to this list's emails.
Rob
-----Original Message-----
From: Konstantin Kolinko [mailto:knst.kolinko@gmail.com]
Sent: 16 March 2012 10:24
To: Tomcat Users List
Subject: Re: How to leave this list?
2012/3/16 Purvis Robert (NHS CONNECTING FOR HEALTH) <ro...@nhs.net>:
> Can anyone tell me how to leave this email list? I have tried sending an email to the unsubscribe address, but that has not worked.
Was the mail lost, or there was some specific error message?
There are more detailed instructions here:
http://www.apache.org/foundation/mailinglists.html
If that does not help you can send mail to "list owner" address and he
will unsubscribe you manually.
Best regards,
Konstantin Kolinko
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How to leave this list?
Posted by "Purvis Robert (NHS CONNECTING FOR HEALTH)" <ro...@nhs.net>.
Can anyone tell me how to leave this email list? I have tried sending an email to the unsubscribe address, but that has not worked.
********************************************************************************************************************
This message may contain confidential information. If you are not the intended recipient please inform the
sender that you have received the message in error before deleting it.
Please do not disclose, copy or distribute information in this e-mail or take any action in reliance on its contents:
to do so is strictly prohibited and may be unlawful.
Thank you for your co-operation.
NHSmail is the secure email and directory service available for all NHS staff in England and Scotland
NHSmail is approved for exchanging patient data and other sensitive information with NHSmail and GSi recipients
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Re: Writing a custom resource factory
Posted by Felix Schumacher <fe...@internetallee.de>.
Am 15.03.2012 21:54, schrieb Michael-O:
> Hi folks,
>
> I'd like to write a custom ldap resource factory as same as a data
> source factory. The getObjectInstance method shall return
> InitialDirContext object. I have written a mock factory and noticed
> that the output is cached by Tomcat. So the object is created only
> once (same id in Eclipse debugger).
I think you can change that behavior, but it will not be necessary in
your case.
>
> Now I need to verify that the InitialDirContext is still valid (conn
> timeout, etc.), same as testOnBorrow with DataSource. I won't have
> any
> reference to it after its creation. This means that I would need to
> wrap that object somehow and perform the operation myself?
> This is how Tomcat JDBC Pool does.
>
> Is my assumption correct? If yes, I would need to wrap every sing
> method defined in DirContext and InitialDirContext.
If you look at the example, you gave. You will see, that the resource
created
a factory for you. That factory manages a pool and creates and
validates
connection objects for you.
So, by using
http://tomcat.apache.org/tomcat-7.0-doc/jndi-resources-howto.html#Generic_JavaBean_Resources
you can easily define a resource, which creates a
DirContext-factory/pool object.
That factory can be the same for the whole application, if you make it
thread safe.
The factory-method can than manage the pool and validate each
DirContext object, before it
hands it out to you. Just remember to give it back to the pool/factory.
Regards
Felix
>
> Thanks,
>
> Mike
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
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