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From Matthieu Morel <mmo...@apache.org>
Subject Re: 回复: event dispatch
Date Mon, 15 Apr 2013 15:15:38 GMT

On Apr 15, 2013, at 15:50 , 唐装鼠 wrote:

> 
> 
> As you say,within an S4 cluster, events are dispatched according to their key + hashing
and mod.
> I want to dispatch events in adapter app and dispatch events by hashing on one string
which I set myself.How to implement?

Have a look at the KeyFinder , it is used to identify extract keys from events.

Matthieu

> 
> ------------------ 原始邮件 ------------------
> 发件人: "Matthieu Morel"<mmorel@apache.org>;
> 发送时间: 2013年4月15日(星期一) 晚上9:35
> 收件人: "s4-user"<s4-user@incubator.apache.org>;
> 主题: Re: event dispatch
> 
> Hi,
> 
> within an S4 cluster, events are dispatched according to their key + hashing and mod
, so there is no round-robin. To broadcast, use a null key.
> 
> Across S4 clusters inter-app communication, (e.g. when injecting events from an adapter),
keyless events (null key) are distributed in a round robin fashion.
> 
> Hope this helps,
> 
> Matthieu
> 
> 
> 
> On Apr 14, 2013, at 04:35 , 唐装鼠 wrote:
> 
> > Hi,I am new to S4.I want to know how to dispatch events to nodes.
> > Including:
> > How to dispatch events in a round robin fashion?
> > How to dispatch one event to all nodes?
> > How to dispatch one event to a particular node?
> > Thanks!
> 
> .


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