[wildfly-dev] Map / reduce for management operations

[Harald Pehl]

> Am 31.10.2014 um 20:35 schrieb Stan Silvert <ssilvert at redhat.com>:
> 
> On 10/31/2014 2:46 PM, Heiko Braun wrote:
>> The problem has nothing todo with GWT.
> It has everything to do with GWT.   The client code to deal with his 
> problem is 10x simpler in real Java.   I know because I've coded both 
> many times.
>> 
>> The single purpose of Haralds proposal is to reduce the number of requests and the actual amount of data when querying large groups of servers. The native interface suffer from this as well, it's just not that obvious because it's per se more performant then the HTTP interface (optimised wire format, persistent connections, etc).
> That's not true.  Management requests are small, fast, and cheap. Doing 
> it over HTTP makes no noticeable difference.
> 
> The good thing about Harald's proposal is that it would make the code a 
> little simpler for Java clients and a lot simpler for GWT clients.

It's really about making management operations for big domains easier and more performant. The current proposal is not meant to be a used as a query language. It's purpose is clearly focused to read resources / attributes over deeply nested or distributed resources.

Whether the client is using GWT or any other language or framework is not the main focus of the proposal. It just happens to fit quite well to GWT's asynchronous nature.   

>> 
>> 
>> On 31 Oct 2014, at 17:05, Heiko W.Rupp <hrupp at redhat.com> wrote:
>> 
>>>> Am 31.10.2014 um 17:03 schrieb Stan Silvert <ssilvert at redhat.com>:
>>>> How much of a problem would this be if it were not for GWT's callback-hell?  It's my understanding that GWT is fixing that?
>>> HAL is not the only client out there that needs that.
>>> RHQ/JBoss ON can heavily benefit from that.
>>> 
>>> 
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---
Harald Pehl
JBoss by Red Hat
http://hpehl.info