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From James Strachan <james.strac...@gmail.com>
Subject Re: [Geronimo] Clustering
Date Mon, 19 Dec 2005 14:37:07 GMT

On 19 Dec 2005, at 14:14, Jules Gosnell wrote:

> James Strachan wrote:
>
>> On 19 Dec 2005, at 11:53, Jules Gosnell wrote:
>>
>>> , whether there is other suitable Geronimo or ASF-licensed code   
>>> available, or whether we will need to write our own WADI-  
>>> autodiscovery classes. The important thing is to impose as few   
>>> dependencies on the client as possible. The client side code  
>>> should  literally be a few lines. Clients using clusters should  
>>> not  suddenly find themselves sucking down e.g. the whole of  
>>> activemq,  just to do a once off autodiscovery. Early versions of  
>>> WADI had its  own autodiscovery code. If we need them, they could  
>>> be resuscitated.
>>
>>
>> There's no reason why you can't do a simple implementation of   
>> ActiveCluster which doesn't use ActiveMQ - its just a simple API.
>
> Sure - but I'm talking about the EJB-client side - where we just  
> want to throw across as thin a line as possible, in order to haul a  
> decent strength cable back. An EJB client would not need the  
> ActiveCluster API (I'm not thinking in terms of making EJB clients  
> fully fledged cluster members), but simply a way of locating the  
> cluster and requesting a membership snapshot of it.

Thats exactly what the ActiveCluster API is for :). Though by all  
means come up with another API if you can think of a better way of  
doing it.

> This could be done by just broadcasting a query packet at a well  
> known multicast address and waiting for the first well-formed  
> response.

Sure - an *implementation* of ActiveCluster API could do exactly that.

James
-------
http://radio.weblogs.com/0112098/


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