[infinispan-dev] Async cache interface

[Manik Surtani]

In relation to this, I have just checked in some changes to the Cache  
interface - new API methods + javadocs explaining how to use them.

Please have a look and feedback.  Note that the impl isn't in place  
yet, but this is how I see it happening:

1.  Cache delegate adds a flag on to the invocation context that a  
Future is needed, and calls the *regular* API method.
2.  The BaseRPCInterceptor usually makes either sync or async RPC  
calls based on overall config plus override flags.  It will now also  
look for this Future flag on the context, and if it is set, perform  
the RPC as a *sync* call, but in a separate thread, and return a Future.
3.  Will use the same async executor that async calls use for  
asynchronous marshalling.

Thoughts?  This will mean only the RPC is taken offline (including  
marshalling).  Locking, etc. happens on the thread's context for the  
various reasons outlined below.

Cheers
Manik


On 5 May 2009, at 14:23, Manik Surtani wrote:

> Picking up on
>
> 	https://jira.jboss.org/jira/browse/ISPN-72
>
> I was thinking about from what point the call is placed on a  
> separate thread.  The obvious bit is the network stack so that the  
> caller gets a Future before the call goes out on the network, but  
> maybe there is sense to do this even earlier?  Perhaps as soon as  
> the invocation is made?  Things to consider though are transaction  
> context - which exist on the caller's thread - and potential context  
> class loaders on the thread.  Stuff that can be dealt with easily  
> enough - e.g., if we have an AsyncInterceptor that handles the  
> thread pooling and management of the Future, and this sits *after*  
> the TxInterceptor so transaction participation is already determined  
> and transaction context attached to the call.  Context classloaders  
> and the like could be attached to the worker thread that then  
> carries the call down the chain and to the wire.
>
> Thoughts?
> --
> 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