Re: [Opensymphony-oscache] help with clustering

It is possible to handle other events and broadcast them to the cluster 
but distributed transactions are not supported.  You might want to try 
Coherence or Jbosscache.

Neos 76 wrote:

> Hi,
>
> thx for your response. Yes, flush messages are send to all nodes of 
> cluster. I think oscache is not the product I'm looking for :((
>
> Thx
> Neos
>
>> From: "Thomas Sasala" <[email protected]>
>> Reply-To: [email protected]
>> To: [email protected]
>> Subject: RE: [Opensymphony-oscache] help with clustering
>> Date: Mon, 09 May 2005 14:06:27 +0000
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>> Unless something has changed in the last couple of weeks, to the best 
>> of my knowledge, oscache does not handle distributed object 
>> tracking.  That is, oscache does not serialize cached objects and 
>> distribute them across all caches.  The only messages sent to 
>> distributed caches are flush messages.  Try sending a flush message 
>> and see what happens.  My results have been mixed (e.g., unreliable 
>> reception of flush messages) using jgroups and multicast.  However, I 
>> have not had time to investigate the problem well enough to report 
>> the issue (if there is one).
>>
>> -Tom
>>
>>> From: "Neos 76" <[email protected]>
>>> Reply-To: [email protected]
>>> To: [email protected]
>>> Subject: [Opensymphony-oscache] help with clustering
>>> Date: Mon, 09 May 2005 02:32:02 +0200
>>>
>>> Hi,
>>>
>>> I'm new to OSCache. I configured OSCache (2.1.1) to use JGroups to 
>>> broadcast cahce events. This is my oscahce.properties file (in 
>>> WEB-INF/classes folder):
>>>
>>> cache.event.listeners=com.opensymphony.oscache.plugins.clustersupport.JavaGroupsBroadcastingListener, 
>>>  \
>>>                     
>>> com.opensymphony.oscache.extra.CacheEntryEventListenerImpl,               
>>> \
>>>                     
>>> com.opensymphony.oscache.extra.CacheMapAccessEventListenerImpl,           
>>> \
>>>                     
>>> com.opensymphony.oscache.extra.ScopeEventListenerImpl
>>>
>>> cache.memory=true
>>> cache.capacity=10
>>> cache.algorithm=com.opensymphony.oscache.base.algorithm.LRUCache
>>> cache.blocking=false
>>>
>>> Cluster looks like to be ok. In log file I see
>>>
>>> ...
>>> 16:58:31,956 INFO  [JavaGroupsBroadcastingListener] JavaGroups 
>>> clustering support started successfully
>>>
>>> I see also that two app are joined to the cluster
>>>
>>> I'm working with two servlet container (Caucho Resin) on two 
>>> phisical server.
>>> The problem is that using GenralCacheAdministrator (I save it in a 
>>> static field), the cache on the first server is not distributed on 
>>> second server. I dont'see notification messages.
>>> I do simply this:
>>>
>>> on first server I create an object and put the object in cache with 
>>> key "mykey1". On second server I get object stored in key "mykey1" 
>>> but I have a NeedsRefreshException.
>>>
>>> code 1:
>>>
>>> CacheManager cacheManager = CacheManager.getInstance(); // my class 
>>> to save GeneralCacheAdministrator
>>> GeneralCacheAdministrator cacheAdm = 
>>> cacheManager.getGeneralCacheAdministrator();
>>> Car car = new Car(carId,carColor);
>>> Cache cache = cacheAdm.getCache();
>>> cacheAdm.putInCache("Car1",car);
>>>
>>> code 2:
>>>
>>> CacheManager cacheManager = CacheManager.getInstance();
>>> GeneralCacheAdministrator cacheAdm = 
>>> cacheManager.getGeneralCacheAdministrator();
>>> Cache cache = cacheAdm.getCache();
>>> Car carInCache = (Car) cacheAdm.getFromCache("Car1"); // throws 
>>> NeedsRefreshException
>>>
>>> Can you tell me where is my mistake? I'm being crazy...
>>> Thank you in aadvance
>>> Neos
>>>
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