[infinispan-dev] transaction/query/mapreduce over hotrod

[Vladimir Blagojevic]

Mircea,

I applaud the effort and your experiment! Having said that I think we 
have to engineer a much more plumbing for more complicated cases, e.g 
map/reduce (marshalling results, classloading etc etc). I am more and 
more convinced nowadays that all of this plumbing is better provided by 
AS itself rather than us reinventing the wheel here...

WDYT?

Vladimir
On 11-07-15 7:53 AM, Mircea Markus wrote:
> Hi,
>
> As there is a high community demand for having these operations in 
> place, and most of these are targeted for post 5.1 releases, I thought 
> about a workaround for having this functionality in place.
> I hijacked Hotrod's put operation and added a custom interceptor, so 
> that if a certain object is being "put" into remote cache, the server 
> side interceptor jumps in and runs transactions.
> This doesn't look too bad for the user, e.g. for supporting transactions:
>
> |RemoteCache rc = getRemoteCache();//from somewhere...
>
> //this is what we'll use for running remote transactions over hotrod
> BatchEnabledRemoteCache berc = new BatchEnabledRemoteCache(rc);
>
> berc.startBatch(); //everything from here to endBatch call is a single transaction
> berc.put("k", "v1");
> berc.put("k2", "v2");
> berc.put("k3", "v3");
> berc.endBatch(true); // all or nothing!
> |
> |
> |
>
> Of course this won't work with other clients than the java client, but 
> I think most of our users are using that one ATM.
> Currently there's only support for transactions but this approach (and 
> the code) can be easily extended to mapreduce and querying.
> I added s short description on how this can be used [1], also the 
> source code is available here[2].
>
> What do you think about it? Is it worth suggesting to the users this 
> approach(and possibly the code as well)?
>
> Cheers,
> Mircea
>
> [1] https://github.com/mmarkus/ops_over_hotrod/wiki/Usage-guide
> [2]https://github.com/mmarkus/ops_over_hotrod
>
>
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