RE: Application Clustering
RE: Application Clustering
- Subject: RE: Application Clustering
- From: "Karl Gretton" <email@hidden>
- Date: Tue, 11 Nov 2003 14:21:48 -0500
Thanks David. I am also looking at the automatic functionality in JBoss and
seeing whether that fits the bill. Probably the best thing is for me to
write a test app and give them all a try.
You are right about the motivational requirement for a development team.
They currently have lots of .NET experience but also lots of Java experience
too. I think that everyone is getting pretty sick of .NET though after more
and more delays and functionality that doesn't actually work.
.NET provides a lovely IDE for writing bad code. The IDE is its only good
feature (says Karl looking at a small .NET application written by a client
with over 900 SQL Server tables, 2500 stored procedures, 90 user defined
functions......did they ever hear of 3-tier or n-tier??)
Thanks for your input.
Karl
-----Original Message-----
From: David Neumann [mailto:email@hidden]
Sent: November 11, 2003 1:57 PM
To: Karl
Subject: Re: Application Clustering
Karl, on my system it's located in
Examples/JavaWebObjects/Frameworks/SessionStoreExample
There's also a test app that uses this framework in
Examples/JavaWebObjects/PersistentSessionStore
There's actually all kinds flavors in here, synchronous, distributed,
persistent, etc. You can write sessions to files, write them to a WO
URL. If you go the distributed route. Try the file stuff first. Then
try the distributed version later.
If you're team doesn't want to use WO, they will give up very quickly
on problems rather than try hard, they will WANT to find flaws and will
ignore positives, they will deliberately not "get it" and do things the
hard way... my advice is either go .net OR get a new team. There are
plenty of solid WO guys out there in this economy that you can scoop up
(and rather quickly too with just a post to omni's dev list).
dave
On Nov 10, 2003, at 9:20 PM, Karl wrote:
> Hmm...which example? I looked around and nothing seemed to fit.
>
> I took over as the architect recently having not used WO since
> v4...and my team seams to be wanting to convert to .NOT
>
> Karl
>
>
> On Nov 10, 2003, at 10:12 PM, David Neumann wrote:
>
>> Actually
>>
>> A persistent session store project is included as an example with
>> full source. This writes sessions out to a url, disk, or whatever.
>> That does let a session recover if an instance dies. Check it out.
>> It's pretty neat and straightforward. WOSessionStore was designed to
>> be subclassed for things like this.
>>
>> d
>>
>>
>> On Nov 10, 2003, at 3:22 PM, Karl Gretton wrote:
>>
>>> Hi,
>>>
>>>
>>>
>>> We are moving an application to a cluster of Xserve's running WO
>>> 5.2.2 under
>>> Panther Server. While WO does some application server / instance
>>> level load
>>> balancing, what facilities are available in the event of the failure
>>> of an
>>> instance?
>>>
>>>
>>>
>>> Is there a session level failover API or some automatic
>>> functionality to
>>> maintain user state?
>>>
>>>
>>>
>>> Also, we have extensive caching taking place within the application
>>> and also
>>> use shared editing contexts. Are there any automatic facilities for
>>> synchronizing cached objects or objects in a shared editing context?
>>> If
>>> not, does anyone have any particular thoughts on the best way to
>>> achieve
>>> this within WO?
>>>
>>>
>>>
>>> In the past I have used EJB facilities (Message Beans) or simple
>>> SOAP calls
>>> to registered servers but this seems like a lot of work. Other app
>>> servers
>>> such as WebLogic and WebSphere have APIs for handling both of these
>>> features.
>>>
>>>
>>>
>>> Any thoughts would be welcome.
>>>
>>>
>>> Regards,
>>>
>>>
>>>
>>> Karl
>>> _______________________________________________
>>> webobjects-dev mailing list | email@hidden
>>> Help/Unsubscribe/Archives:
>>> http://www.lists.apple.com/mailman/listinfo/webobjects-dev
>>> Do not post admin requests to the list. They will be ignored.
_______________________________________________
webobjects-dev mailing list | email@hidden
Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/webobjects-dev
Do not post admin requests to the list. They will be ignored.