[infinispan-dev] hotrod's RemoteCacheManager

[Mircea Markus]

On 25 Mar 2010, at 13:41, Manik Surtani wrote:

> 
> On 25 Mar 2010, at 06:30, Mircea Markus wrote:
> 
>> Thanks for the feedback!
>>> 
>> 
>> On 25 Mar 2010, at 02:18, Manik Surtani wrote:
>> 
>>> 
>>> On 24 Mar 2010, at 11:11, Mircea Markus wrote:
>>> 
>>>> I've checked in ongoing work of the hotrod client; it would be great to get some feedback on the public API, especially RemoteCache[1] and RemoteCacheManager[2].
>>>> For now RemoteCacheManager does not implement CacheManager interface, see email bellow.
>>>> 
>>>> [1] http://tinyurl.com/yhb793b
>>> 
>>> Looks good.  Shouldn't VersionedEntry be VersionedValue<V> ?  
>>> 
>>> Basically Cache.get(K) returns V.  So RemoteCache.getVersioned(K) should return VersionedValue<V> ?
>> good point. It's a Entry<K,V>, as it extends Map.Entry<K,V> 
> 
> That would be at odds with Cache.get(K) which returns a value (V) and not a Map.Entry<K, V> ....
I don't have a preference for either one so I'll go for your proposal.
> 
>>> 
>>> 
>>>> [2] http://tinyurl.com/yh6j2we
>>> 
>>> Don't you want RemoteCacheManager to be an interface and a separate RemoteCacheManagerImpl or something?
>> I've been thinking about that; I wanted to copy the behaviour from core, in which we instantiate the DefaultCacheManagers directly. 
> 
> Yes, but DefaultCacheManager implements CacheManager.  The reason why the interface is useful is because there are valid use cases where people have delegating or aggregating CacheManagers, exposed as a single CacheManager.  
It will implement CacheContainer (which CacheManager extends). The rest of the methods are only constructors. Wouldn't that be enough?
> Look at the stuff Brian's doing with JBoss AS 6 for example.
> 
>>> Also, maybe you want to also provide a constructor that takes in (Properties p, int numBossThreads, int numWorkerThreads) and (Properties p, int numBossThreads, int numWorkerThreads, ClientIntelligenceLevel cil) - or are these three (boss threads, worker threads, client intelligence level) all defined in properties?
>> these will all be defined in properties. It might make sense having an constructor that takes all the config props though.
> 
> Hmm, maybe just the most common config props.
> 
>> 
>>> 
>>> 
>>>> 
>>>> Cheers,
>>>> Mircea
>>>> 
>>>> 
>>>> On 23 Mar 2010, at 23:16, Mircea Markus wrote:
>>>> 
>>>>> Hi,
>>>>> 
>>>>> While presenting the hot rod client java API in Brno, we agreed to use a RemoteCacheManager that would implement CacheManager (similar to the way in which DefaultCacheManager implements CacheManager; it is used for clients from the same namespace).
>>>>> Looking at the CacheManager interface[1], most of the methods that do not make sense on the RemoteCacheManager: defineConfiguration, getClusterName, getAddress, isCoordinator, getStatus, getGlobalConfiguration, getDefaultConfiguration and getCacheNames. 
>>>>> The only two methods that really make sense are: getCache() and getCache(cacheName:String). So here are some thoughts I have about having RemoteCacheManager implementing CacheManager.
>>>>> 1. Approach 1 - throw exceptions for the unsupported methods. Not a very nice approach IMO, given the fact that most of the methods fall in this category, which would make the API a bit unusable
>>>>> 2.  Approach 2 - do not extend it. This would result in a clearer API
>>>>> 3. Approach 2 - Extract the  two getCache methods in an super interface (CacheHolder, CacheRepository, ??) and have both CacheManager and RemoteCacheManager implement it - this one I like the most as it encourages reusability and keeps the API clean.
>>>>> 
>>>>> Thoughts?
>>>>> 
>>>>> Cheers,
>>>>> Mircea
>>>>> 
>>>>> [1] http://anonsvn.jboss.org/repos/infinispan/trunk/core/src/main/java/org/infinispan/manager/CacheManager.java
>>>>> _______________________________________________
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>>>> 
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>>> --
>>> Manik Surtani
>>> manik at jboss.org
>>> Lead, Infinispan
>>> Lead, JBoss Cache
>>> http://www.infinispan.org
>>> http://www.jbosscache.org
>>> 
>>> 
>>> 
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> 
> --
> Manik Surtani
> manik at jboss.org
> Lead, Infinispan
> Lead, JBoss Cache
> http://www.infinispan.org
> http://www.jbosscache.org
> 
> 
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