我有一个元组:
public class mytuple
{
private int status;
private int userid;
private int location;
private int count1;
private int count2;
// corresponding getter settrs included.
}
我创建两个esper语句EPL:
select mytuple.userid as userid, sum(count1) as count1, sum(count2) as count2
from eventStream where mytuple.status = -1
group by userid, location;
and another EPL statement:
select mytuple.userid as userid, sum(count1) as count1, sum(count2) as count2
from eventStream where mytuple.status = 1
group by userid, location;
事件流在配置中注册。
我面临的问题是,在发出的两个事件中......一个作为status = -1而另一个作为status = +1,我在第一个EPL语句中得到+2的增量计数。
但是,如果只发送一个事件,则流可以完美地工作。 我在这里找不到任何东西?
假设我有一个单独的监听器来创建Esper视图。
答案 0 :(得分:0)
最好通过Esper用户邮件列表运行此操作,如http://esper.codehaus.org/about/esper/mailinglist.html中所述 创建一个小测试用例并将其发送,确保使用最新版本。
对于过滤,将条件放在括号中,这是首选符号:
从eventStream中选择....(mytuple.status = 1)....