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From Anthony Vromant <anthony.vrom...@bull.net>
Subject Re: Smooth applications migration in a J2EE cluster [mod_jk]
Date Fri, 08 Dec 2006 09:44:21 GMT
Hi Rainer,

First of all, thank you for these informations.

Here is the HTTP link for the Flash demonstration of our prototype :
https://wiki.objectweb.org/jonas/Upload.jsp?page=JOnASClusteringSmoothUpdateWebCluster 


I am looking at the new features provided by mod_jk 1.2.20, the dynamic 
configuration reloading is quite interesting.
We are going to bring our prototype to this new version.

In our prototype, when a new request is coming with a JSESSIONID cookie, 
a request is sent to the worker (tomcat) for checking the validity (we 
need to know whether the session is still alive).
Currently, the HTTP protocol is used for invoking tomcat rather than 
AJP. The control at the tomcat side is done through an internal servlet 
which accesses the MBean manager for getting the current sessions list.

Do you have any suggestion for improving that ?

Regards,
Anthony

Rainer Jung wrote:
> Hi Anthony,
>
> since your oce is based on 1.2.15 first the information for you, that 
> between 1.2.15 and the released 1.2.19 there were a lot of features 
> added. No old features has been dropped, so it should be feature 
> compatible with 1.2.15. You can look at the changelog
>
> http://tomcat.apache.org/connectors-doc/changelog.html
>
> and maybe the easiest way is to scan the document
>
> http://tomcat.apache.org/connectors-doc/config/workers.html
>
> and for Apache
>
> http://tomcat.apache.org/connectors-doc/config/apache.html
>
> resp. for IIS
>
> http://tomcat.apache.org/connectors-doc/config/iis.html
>
> about new parameters, which you didn't know before. There are also 
> hints in the docs, which of the params have been added in which version.
>
> Concerning 1.2.20 I'll make a tarball for testing including the docs 
> most likely tonight. We changed a bit more, than was planned, so we 
> give people a couple of days to report problems early, before we tag 
> the release. Again, all changes will be contained in the configuration 
> reference guide.
>
> Regards,
>
> Rainer
>
> Anthony Vromant wrote:
>> Rainer Jung wrote:
>>> Mladen Turk wrote:
>>>> Anthony Vromant wrote:
>>>>>
>>>>> Would it be possible to integrate such a feature in the original 
>>>>> mod_jk ? If yes, we may contribute to the development by providing 
>>>>> our code.
>>>>>
>>>>
>>>> There is no need to ask something like that.
>>>> Just like for any other patch bring in the code,
>>>> and we'll discuss, but it cannot be answered in advance.
>>>> Anyhow, according to the description it looks very interesting.
>>>>
>>>> Regards,
>>>> Mladen.
>>>
>>> Exactly the same from me. The upcoming release 1.2.20 will already 
>>> include a lot of improvements in the jk status worker and we all 
>>> think, that managing changes in a distributed 24x7 system already is 
>>> a very important topic.
>>>
>>> Waiting for your proposals :)
>>>
>>> Rainer
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: dev-unsubscribe@tomcat.apache.org
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>>>
>>>
>> Glad to note that you are interested in this topic.
>>
>> I propose to send you as soon as possible a HTTP link towards a Flash 
>> presentation of our prototype.
>> Thus you'll have a good overview of the feature.
>>
>> For the source code, we have to do some 'cleaning' work before being 
>> able to submit it to you.
>>
>> Can you tell me where to find information about new features of 
>> mod_jk 1.2.20 ?
>>
>> For your information, our prototype is built from  mod_jk 1.2.15. We 
>> could bring it to the 1.2.20.
>>
>> Regards.
>>
>> ----------------------------------------------------------------
>> Anthony Vromant
>> http://jonas.objectweb.org
>> Bull, Architect of an Open World TM
>> http://www.bull.com
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: dev-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: dev-help@tomcat.apache.org
>
>


-- 
----------------------------------------------------------------
Anthony Vromant
http://jonas.objectweb.org
Bull, Architect of an Open World TM
http://www.bull.com 


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