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From David Van Couvering <da...@vancouvering.com>
Subject Re: Derby synchronization
Date Thu, 26 May 2005 16:07:18 GMT
Hi, Neal, thanks.  It sounds like you are looking for Derby to provide 
some kind of synchronization mechanism between two Derby database 
instances.  If so, Derby does not currently provide such a feature, 
tunneled or otherwise.

If this is not what you meant, please let me know.

David

Neal Dewing wrote:

> Hi David,
> 
> The "remote application" uses an embedded derby database. All requests to
> this database are passed through a servlet that executes DAO transactions,
> for example remotemethod.execute("DAO", "insert", arg1, arg2);
> 
> In the same way, I require the synchronization mechanism to tunnel requests
> through a servlet.
> 
> 			|				|	
> 			|				|		
> Synchronization	|  http server -->	|  Derby embedded database	
> request --> 	|  				|
> 			|  			 	|		
> 			|				|		
> 
> Hope this provides some clarity on the matter.
> 
> Thanks,
> Neal
> 
> -----Original Message-----
> From: David Van Couvering [mailto:david@vancouvering.com] 
> Sent: Wednesday, May 25, 2005 6:49 PM
> To: Derby Discussion
> Subject: Re: Derby synchronization
> 
> Could you explain more what you mean by "synchronizing through a 
> servlet?"  Do you mean some type of database synchronization to keep two 
> independent databases in synch?
> 
> Thanks,
> 
> David
> 
> Neal Dewing wrote:
> 
> 
>>Hi All,
>>
>>I require the synchronization of two embedded derby databases.
>>
>>The environment is as follows:
>>
>>1. CLIENT APPLICATION:
>>
>>Swing based application
>>The database is accessed through Data access objects (such as SQL2Java's
>>generated DAO's)
>>
>>2. REMOTE APPLICATION:
>>
>>Web based application
>>The database is accessed through a servlet responsible for executing the
>>DAO's.
>>
>>I have found a commercial option (Daffodil Replicator), but it does not
>>currently offer a mechanism for synchronizing through a servlet (although
>>this might be a reasonable specific requirement).
>>
>>1. Does anyone know of a mechanism to do this?
>>2. Would this provide for foreign key integrity?
>>
>>Any help would be greatly appreciated!
>>
>>Kind Regards,
>>Neal
>>
>>
> 
> 


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