[infinispan-dev] Infinispan DEF - Custom parameters upon a failover

[Galder Zamarreño]

Hi Strahinja,

Glad to hear that you're using Infinispan in your master thesis :)

I have some reservations about adding these methods.

You can create a custom distributed callable, so why not pass in this info on construction of the callable, and make sure it's serialized so these parameters are available when these classes are sent to other nodes?

Cheers,

On May 27, 2013, at 6:51 PM, Strahinja Lazetic <lazetics at yahoo.com> wrote:

> Hi, 
> 
> I am currently using Infinispan Distributed Execution Framework for my Master thesis project and I am wondering if it is possible that a DistributedCallable receives some custom parameters from the framework upon a failover, besides Cache instance and Set of keys passed in the setEnvironment method. As a simplified example, a DistributedCallable wants to know whether it was restarted or freshly started. If this is not possible, does it make sense to add a new method to the DistributedTaskFailoverPolicy which will return a user supplied parameters Map and then read it from the setEnvironment method in the DistributedCallable? Here are the signatures of the methods I was thinking off:
> 
> In the DistributedTaskFailoverPolicy class:
> 
> Map<Object, Object> getEnvironmentParameters()
> 
> In the DistributedCallable class:
> 
> setEnvironment(Cache<K, V> cache, Set<K> inputKeys, Map<Object, Object> params)
> 
> I was free to try to implement this and did not take to much time, so now I am wondering if there was already a way to do something like this in the Infinispan DEF.
> 
> Thank you in advance for your comments and suggestions.
> Strahinja Lazetic
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--
Galder Zamarreño
galder at redhat.com
twitter.com/galderz

Project Lead, Escalante
http://escalante.io

Engineer, Infinispan
http://infinispan.org