[rules-users] 答复: 答复: Concurrent rule fire

[Wolfgang Laun]

The question of how to handle program failures is not a Drools issue.
Processing transaction data with a RBS isn't much differenf. A
simple analysis must anszwer questions such as

   - Is processing of one transaction in any way dependent on the
   processing of previous transactions?
   - Is it necessary to conserve the results of one transactions in Working
   Memory?
   - For a restart: How can you establish check points?
   - Is it necessary to execute all transactions in one huge bunch?
   - If one transaction fails, can you recover and continue? How can you
   deal with the failed transaction later on?

In short - questions that have been asked since the invention of data
processing ;-) But an answer requires - as always - detailed information.

-W



2012/1/8 Zhuo Li <milanello1998 at gmail.com>

>  That is my question actually. Say if I have one rule which is scheduled
> to run twice a day, what about if the first schedule failed and got
> restarted, but when the first job is still running, the second job’s
> schedule time arrives. Will the second schedule wait for first to finish?*
> ***
>
> ** **
>
> Best****
>
> Abe****
>
> ** **
>
> *发件人:* rules-users-bounces at lists.jboss.org [mailto:
> rules-users-bounces at lists.jboss.org] *代表 *Nicolas Héron
> *发送时间:* 2012年1月8日 23:08
> *收件人:* Rules Users List
> *主题:* Re: [rules-users] 答复: Concurrent rule fire****
>
>  ** **
>
> Hi,
>
> You can use more than one drools session ?
> Regards
> Nicolas Héron****
>
>  2012/1/8 Zhuo Li <milanello1998 at gmail.com>****
>
> Any comments?****
>
>  ****
>
> *发件人:* Zhuo Li [mailto:milanello1998 at gmail.com]
> *发送时间:* 2012年1月8日 0:35
> *收件人:* 'Rules Users List'
> *主题:* Concurrent rule fire****
>
>  ****
>
> Hi, folks,****
>
>  ****
>
> My project will handle about 1.5 M transactions per hour using Drools and
> the rules’ fire are scheduled based on business operation cycle which
> might happen a few times a day. Say if I need to fire the same rule set
> twice at 10:00 PM and midnight. What will happen if the first execution has
> not completed till midnight? Will the 2nd execution be held up till the 1
> st is completed? I would assume there might still be transactions
> inserted into working memory between 10:00 PM and midnight although it is
> very few.****
>
>  ****
>
> My understanding is Drools will enforce only one active thread is working
> for the same “then” section for data consistency. Any thoughts?****
>
>  ****
>
> Best****
>
> Abe****
>
>
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