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Subject: Representing Existing Objects In Forms
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Date: Mon, 1 Dec 2003 10:30:12 +1100
Message-ID: <F686814A55922B4393938D9F9D30FABE40B757@srv-bx-mail1.lands.nsw>
Thread-Topic: org.apache.struts.legacy.GenericDataSource
Thread-Index: AcO3ic0VCvcYcGRuRUuSdAK87HVkiwAD6E8w
From: "Toby Saville" <Toby.Saville@lands.nsw.gov.au>
To: "Struts Users Mailing List" <struts-user@jakarta.apache.org>

hello all,

I am wanting to represent an existing object using a form and was wondering=
 how to do this.=20

My situation is displaying a customer's details in a form for the purpose o=
f allowing them to update them.

I cant think how I can populate the form tho.

Im new to struts and this list so i apolagise if this has already been answ=
ered.=20

Thanks,=20

toby

-----Original Message-----
From: David Friedman [mailto:humble@ix.netcom.com]
Sent: Monday, 1 December 2003 8:35 AM
To: Struts Users Mailing List
Subject: RE: org.apache.struts.legacy.GenericDataSource


Rajat,

I haven't had any problems with DBCP.  It's just that a different pool came
with Hibernate that I used in production by default.  I'm using DBCP in
testing but I always close my development computer (my desktop) down at
night so I have no comments on how DBCP works in reality.  I'm sure it's
fine in production.

Regards,
David

-----Original Message-----
From: Rajat Pandit [mailto:rajatp@centergroupinc.com]
Sent: Sunday, November 30, 2003 1:13 AM
To: Struts Users Mailing List
Subject: Re: org.apache.struts.legacy.GenericDataSource


hey david,
thanks a lot!, just one last question, what kind of troubles did u have
with DBCP. coz this will be used in production so i want to know what to
expect, however a refactoring is schedule anyway but not anytime sooner.
thanks once again!


David Friedman wrote:
> Rajit,
>
> I don't use the Struts DataSource because I had to much trouble with it a
> few months ago.  However, the commons DBCP expains all parameters here:
> http://jakarta.apache.org/commons/dbcp/configuration.html
>
> You should be able to set any of them in your struts-config.xml
data-source
> entry with this syntax:
>
> <set-property
>       property=3D"minIdle"
>       value=3D"XXX" />
>
> I checked my testing and production environments and I forgot I've
switched
> away from DBCP to C3P0 (it comes with Hibernate).  However, I'd recommend
> the options (listed in the above mentioned web page):
>
> validationQuery set to "select 1+1" works in MySQL and returns 1 row
> testWhileIdle set to "true"
> timeBetweenEvictionRunsMillis set to "1800000" (1000 miliseconds * 60
> seconds * 30 minutes)
> testOnBorrow set to "true"
> minIdle set to "2" (or higher)
>
> Regards,
> David
>
> -----Original Message-----
> From: Rajat Pandit [mailto:rajatp@centergroupinc.com]
> Sent: Saturday, November 29, 2003 2:14 PM
> To: Struts Users Mailing List
> Subject: Re: org.apache.struts.legacy.GenericDataSource
>
>
> hello david,
> thanks for the quick reply, could u pls mail me the extract of the
> <data-source which worked fr u. along all with the settings. (u can
> ofcourse remove the l/p :P )
> this would be a great help! and have u have the kind of sucess with DBCP
> in dealing with connection pool and idle connections?
> thanks!
>
> David Friedman wrote:
>
>
>>Rajat,
>>
>>I've had that type of disconnect problem using Hibernate (a product
>
> roughly
>
>>like Ibatis).  My problem was one of the DBCP settings: minIdle.  MySQL
>>wasn't seeing any activity on some pool connections overnight, so it was
>>disconnecting them.  Lowering the minIdle setting seemed to cause DBCP to
>>test each pool connection by performing a simple select automatically.
>
> The
>
>>query seems to be a non-table select, along the lines of a 'select 1+1;'.
>>That allowed MySQL to keep each connection active and not disconnect any
>>overnight after being idle for hours.
>>
>>Regards,
>>David
>>
>>-----Original Message-----
>>From: Rajat Pandit [mailto:rajatp@centergroupinc.com]
>>Sent: Saturday, November 29, 2003 12:44 PM
>>To: Struts Users Mailing List
>>Subject: org.apache.struts.legacy.GenericDataSource
>>
>>
>>hello gurus,
>>i have an terrible terrible problem with my application, after hosting
>>this application it stops to work after 8-10hrs of idle state. then the
>>server has to restart and then its fine again.
>>
>>i learnt that the mysql driver disconects after 8hrs of an idle
>>connection so i addred autoreconnect=3Dtrue to the connection url. however
>>the problem doesnt seem to get sovled. just extended fro another another
>>and then the same problem again.
>>i need to  know how to remove org.apache.struts.legacy.GenericDataSource
>>and use the connection from DBCP (commons lib ie.) and will i need to
>>change the settings in the code (struts-config.xml) i also am thinking
>>of refactoring the entire codebase usng iBatis. will it solve this issue?
>>
>>pls help! i need this project to be up and running in the next week.
>>thanks once again
>>the logs follows.
>>
>>
>>
>>NFO:    Return allocated connection, activeCount=3D2, useCount=3D1
>>Nov 28, 2003 8:00:15 PM com.hedging.HedgeUser validUser
>>INFO: --> Error: Communication link failure: java.io.IOException<--
>>Nov 28, 2003 8:00:15 PM org.apache.struts.legacy.GenericDataSource
>>returnConnection
>>INFO:   releaseConnection(), activeCount=3D2, useCount=3D0
>>Nov 28, 2003 8:00:30 PM org.apache.jk.common.ChannelSocket
>
> processConnection
>
>>INFO: connection timeout reached
>>Nov 28, 2003 8:00:33 PM org.apache.jk.common.ChannelSocket
>
> processConnection
>
>>INFO: connection timeout reached
>>Nov 28, 2003 8:00:35 PM org.apache.jk.common.ChannelSocket
>
> processConnection
>
>>INFO: connection timeout reached
>>Nov 28, 2003 8:00:36 PM org.apache.jk.common.ChannelSocket
>
> processConnection
>
>>INFO: connection timeout reached
>>Nov 29, 2003 12:33:42 AM org.apache.jk.common.ChannelSocket
>>processConnection
>>INFO: connection timeout reached
>>Nov 29, 2003 12:33:47 AM org.apache.jk.common.ChannelSocket
>>processConnection
>>INFO: connection timeout reached
>>Nov 29, 2003 12:33:58 AM org.apache.struts.legacy.GenericDataSource
>>getConnection
>>INFO:   getConnection()
>>Nov 29, 2003 12:33:58 AM org.apache.struts.legacy.GenericDataSource
>>getConnection
>>INFO:    Check for timeout, activeCount=3D2, useCount=3D0
>>Nov 29, 2003 12:33:58 AM org.apache.struts.legacy.GenericDataSource
>>getConnection
>>INFO:    Found available connection
>>Nov 29, 2003 12:33:58 AM org.apache.struts.legacy.GenericDataSource
>>getConnection
>>INFO:    Return allocated connection, activeCount=3D2, useCount=3D1
>>Nov 29, 2003 12:33:58 AM com.hedging.HedgeUser validUser
>>INFO: --> Error: No operations allowed after connection closed<--
>>Nov 29, 2003 12:33:58 AM org.apache.struts.legacy.GenericDataSource
>>returnConnection
>>INFO:   releaseConnection(), activeCount=3D2, useCount=3D0
>>Nov 29, 2003 12:34:18 AM org.apache.jk.common.ChannelSocket
>>processConnection
>>--
>>
>>
>>Rajat Pandit | rajatp@centergroupinc.com
>>+91 612 3117606
>>[ Developer and Part Time Human Being]
>>
>>
>>
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>>
>
>
> --
>
>
> Rajat Pandit | rajatp@centergroupinc.com
> +91 612 3117606
> [ Developer and Part Time Human Being]
>
>
>
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>
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--


Rajat Pandit | rajatp@centergroupinc.com
+91 612 3117606
[ Developer and Part Time Human Being]


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