[infinispan-dev] Interested in lending a hand

Galder Zamarreño galder at redhat.com
Thu Mar 3 04:12:00 EST 2011 

On Mar 2, 2011, at 11:26 PM, Olaf Bergner wrote:

> It is my understanding from what Manik said that we would like to have 
> this CacheManager implementation being a part of the standard Spring 
> distribution. Is that correct? Therefore, I have asked in the 
> SpringSource forum
> 
> 1. if those folks are interested in having an Infinispan backed 
> CacheManager implementation contributed to them and
> 2. if so, what I have to do to have my contribution accepted.
> 
> So far, I have not received an answer to my request. I'm a bit 
> sceptical, though, since it *seems* as if the Spring folks only accept 
> dependencies from their own Enterprise Bundle Repository which would 
> leave us obliged to turn Infinispan into an OSGi bundle. Alternatively, 
> we could always make it a part of Infinispan itself, maybe separated 
> into its own module. Any thoughts on this?

Luca Stancapiano has been working on creating an OSGI bundle for Infinispan - https://issues.jboss.org/browse/ISPN-800

You might wanna ping him to see how's he progressing? Or Luca, if you're reading the list you could share some status with us :)

> Meanwhile, the implementation thus far seems to progress nicely, a first 
> test passes. I'm developing against Infinispan 4.2.0.Final, the current 
> stable version. For the time being I concentrate on supporting the 
> embedded use case, although I'm aware that there is RemoteCache and its 
> ilk. I would prefer to finally have two different implementations of 
> org.springframework.cache.CacheManager, one backed by 
> EmbeddedCacheManager and the other by RemoteCacheManager. Those two seem 
> different enough to render any attempt at implementing a common 
> abstraction futile. Any thoughts on this?

Two different implementations makes sense, they have different requirements.

> In addition to the Infinispan backed CacheManager I implemented two 
> FactoryBeans for creating org.infinispan.Cache and 
> org.infinispan.manager.EmbeddedCacheManager instances. At least a 
> FactoryBean for the latter seems necessary since otherwise users will 
> have a hard time trying to obtain an Infinispan backed CacheManager from 
> their application context.
> 
> Right now, all configuration is done by pointing those FactoryBeans to 
> the location of a configuration file in the standard Infinispan format. 
> The Spring way to go would be to alternatively offer setters for all 
> configuration options. However, org.infinispan.config.Configuration is 
> quite ... expansive. Are there any prominent options I should 
> concentrate on first?

Things like JMX switches, clustering modes and locking settings are some of the things that are tweaked most often, so you'd want to start with those IMO.


> 
> Cheers,
> Olaf
> 
> 
> Am 02.03.11 18:03, schrieb Sanne Grinovero:
>> Hi Olaf,
>> We just created the issue to track this:
>> https://issues.jboss.org/browse/ISPN-961
>> thanks for your help!
>> 
>> Cheers,
>> Sanne
>> 
>> 2011/3/2 Olaf Bergner<olaf.bergner at gmx.de>:
>>> So I will implement Spring's CacheManager interface first. After that, I
>>> will have a look at ISPN-78. It looks highly interesting, yet not
>>> exactly trivial. Which is good and bad ;-) I'll see how it goes. Anyway,
>>> the list of open issues for 5.1.0.Final should prove sufficient to keep
>>> me entertained for a while.
>>> 
>>> Cheers,
>>> Olaf
>>> 
>>> Am 02.03.11 11:29, schrieb Manik Surtani:
>>>> Great! If you are a Spring guy (or even if not!), you could implement
>>>> 
>>>>       http://static.springsource.org/spring/docs/3.1.0.M1/javadoc-api/index.html?org/springframework/cache/CacheManager.html
>>>> 
>>>> using Infinispan, and contribute it back to Spring ... we'd really appreciate that and it would be a great start for you to get used to working with Infinispan.  :-)
>>>> 
>>>> Then, perhaps something more meaty like:
>>>> 
>>>>       https://issues.jboss.org/browse/ISPN-78
>>>> 
>>>> might be fun... or if you like Linux/C/JNI:
>>>> 
>>>>       https://issues.jboss.org/browse/ISPN-517
>>>> 
>>>> Otherwise, do any of these look interesting to you?
>>>> 
>>>>       https://issues.jboss.org/secure/IssueNavigator.jspa?mode=hide&requestId=12313236
>>>> 
>>>> Cheers
>>>> Manik
>>>> 
>>>> On 1 Mar 2011, at 20:01, Olaf Bergner wrote:
>>>> 
>>>>> Hi Manik,
>>>>> 
>>>>> well, my areas of expertise are probably irrelevant in this context. I
>>>>> chose Infinispan primarily as an opportunity to learn while working on a
>>>>> fascinating project that addresses some of the pain points in today's
>>>>> application development.
>>>>> 
>>>>> As to my areas of interest: I do indeed find transaction management
>>>>> fascinating, that's why I was looking for an easy task in that area. But
>>>>> all in all, I'm interested in the whole distributed computing thing. I
>>>>> read the Dynamo paper, so I understand constant hash rings at least on a
>>>>> theoretical level.
>>>>> 
>>>>> Otherwise, I thought there might be some mundane tasks nobody else is
>>>>> especially keen on taking on as they are probably not very interesting.
>>>>> Improving logging comes to mind, maybe adding some documentation.
>>>>> Technically not very demanding and yet those tasks need to be done. Plus
>>>>> they might be an opportunity to get to know the code base.
>>>>> 
>>>>> All in all I'm open to suggestions.
>>>>> 
>>>>> Cheers
>>>>> Olaf
>>>>> 
>>>>> Am 01.03.11 18:32, schrieb Manik Surtani:
>>>>>> Hi Olaf
>>>>>> 
>>>>>> Welcome to the mail list!  :-)
>>>>>> 
>>>>>> I believe someone (Mircea) is already working on ISPN-272 as we speak, but there are lots of other interesting things you can take on.  Are there any specific areas of interest or expertise you may have?
>>>>>> 
>>>>>> Cheers
>>>>>> Manik
>>>>>> 
>>>>>> On 1 Mar 2011, at 14:14, Olaf Bergner wrote:
>>>>>> 
>>>>>>> I've been quietly following Infinispan's progress and finally made the
>>>>>>> decision to offer to help out. Since I'm not an experienced system-level
>>>>>>> programmer - I've got a strong background in JEE application development
>>>>>>> - I was looking for a not too complex task to start with. I took a look
>>>>>>> at ISPN-272 "Implement XA recovery in TransactionXaAdapter" and if I
>>>>>>> interpret Manik Surtani's comments correctly it all boils down to
>>>>>>> essentially:
>>>>>>> 
>>>>>>> * Make it so that Xid[] recover(int flags) returns the Xids of the
>>>>>>> LocalTransactions managed by this TransactionXaAdapter that are
>>>>>>> currently in state 'PREPARED'
>>>>>>> 
>>>>>>> Is this correct? If so I thought about
>>>>>>> 
>>>>>>> 1. adding a method Set<LocalTransaction>
>>>>>>> getLocalTransactionsCurrentlyInStatus(int desiredStatus) to
>>>>>>> TransactionTable, and
>>>>>>> 2. having recover(int flags) on TransactionXaAdapter delegate to this
>>>>>>> new method, passing in Status.STATUS_PREPARED.
>>>>>>> 
>>>>>>> So:
>>>>>>> 
>>>>>>> 1. Could you use my help?
>>>>>>> 2. Is ISPN-272 a good starting point, or are there better tasks for a
>>>>>>> newcomer?
>>>>>>> 3. If ISPN-272 is good starting point, is my proposed solution viable,
>>>>>>> or is it lacking?
>>>>>>> 
>>>>>>> Regards,
>>>>>>> Olaf
>>>>>>> _______________________________________________
>>>>>>> infinispan-dev mailing list
>>>>>>> infinispan-dev at lists.jboss.org
>>>>>>> https://lists.jboss.org/mailman/listinfo/infinispan-dev
>>>>>> --
>>>>>> Manik Surtani
>>>>>> manik at jboss.org
>>>>>> twitter.com/maniksurtani
>>>>>> 
>>>>>> Lead, Infinispan
>>>>>> http://www.infinispan.org
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> _______________________________________________
>>>>>> infinispan-dev mailing list
>>>>>> infinispan-dev at lists.jboss.org
>>>>>> https://lists.jboss.org/mailman/listinfo/infinispan-dev
>>>>>> 
>>>>> _______________________________________________
>>>>> infinispan-dev mailing list
>>>>> infinispan-dev at lists.jboss.org
>>>>> https://lists.jboss.org/mailman/listinfo/infinispan-dev
>>>> --
>>>> Manik Surtani
>>>> manik at jboss.org
>>>> twitter.com/maniksurtani
>>>> 
>>>> Lead, Infinispan
>>>> http://www.infinispan.org
>>>> 
>>>> 
>>>> 
>>>> 
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>>>> 
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> 
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--
Galder Zamarreño
Sr. Software Engineer
Infinispan, JBoss Cache

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