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

[Mircea Markus]

On 15 Jul 2011, at 18:17, Vladimir Blagojevic wrote:

> 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?
+1. This is workaround only works with java clients, which way too restrictive for Hotrod, so we cannot consider this as a solution even if we'd want to :-)  
> 
> 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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> 

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