hi ,thank you for reply me.i don't know whether the Job configuration can
work,now i solve it in another way.
i want to pass a value from main to map because i want to do a judge in
map.now i write several map class and judge it in main().
在 2012年4月26日 下午5:58，Devaraj k <devara...@huawei.com>写道：
> Hi Wang Ruijun,
>
> You can do this way,
>
> 1. Set the value in Job configuration with some property name before
> submitting the job.
> 2. Get the value in map() function using the property name from the
> configuration and you can perform the business logic.
>
>
>
> Thanks
> Devaraj
>
> ________________________________________
> From: Ajay Srivastava [ajay.srivast...@guavus.com]
> Sent: Thursday, April 26, 2012 2:58 PM
> To: <common-user@hadoop.apache.org>
> Subject: Re: Passing a value from main() to map()
>
> Hi,
> It seems that you are trying to code a hadoop job which takes input from
> stdin ?
> As far as I know it is not possible as hadoop job works on input coming in
> batches not on real time streams.
> Please wait for others response as well as I am a beginner and may be
> missing something here.
>
>
> Ajay Srivastava
>
> On 26-Apr-2012, at 2:27 PM, 王瑞军 wrote:
>
> > hello everyone:
> > i have a problem.we knew map() has it's own parameter such
> > as map(Object key, Text value, Context context).
> > the following is my structure.
> >
> > public class aaa{
> > public static class bbb {
> > public void map() {
> > i want use the variable number here;
> > for example;
> > if(number==0) {print xxxxxx}
> > }
> > }
> > public static void main() {
> > we receive a number from the keyboard,for example;
> > Scanner input = new Scanner(System.in);
> > number = input.nextInt();
> > }
> > }
> >
> > so how can i do?grateful!
>
