我正在尝试从 WSO2 CEP 3.1.0 迁移到 WSO2 CEP 4.0.0。
我已将现有执行计划转换为新的 SiddhiQL 语法:
@Plan:name('occurredFailure')
@Import('responseTimeStream:1.0.0')
define stream responseTimeStream (service string, responseTime int);
@Import('queryTimeStream:1.0.0')
define stream queryTimeStream (service string, queryTime int);
@Export('occurredFailureStream:1.0.0')
define stream occurredFailureStream (service string, cause string);
define table slowestQueryTimeTable (service string, slowestQueryTime int);
from responseTimeStream[responseTime == 0]
select service, 'noResponse' as cause
insert into occurredFailureStream;
from queryTimeStream[queryTime >= 5000]
select service, 'queryTimeout' as cause
insert into occurredFailureStream;
from queryTimeStream[not((service == slowestQueryTimeTable.service) in slowestQueryTimeTable)]
select service, queryTime as slowestQueryTime
insert into slowestQueryTimeTable;
from queryTimeStream[(service == slowestQueryTimeTable.service and queryTime <= slowestQueryTimeTable.slowestQueryTime) in slowestQueryTimeTable]
select service, queryTime as slowestQueryTime
update slowestQueryTimeTable
on queryTimeStream.service == slowestQueryTimeTable.service;
from responseTimeStream[(service == slowestQueryTimeTable.service and responseTime >= slowestQueryTimeTable.slowestQueryTime) in slowestQueryTimeTable]
select service, 'responseTimeAboveQueryTime' as cause
insert into occurredFailureStream;
不幸的是,当我尝试验证查询表达式时,WSO2 CEP 4.0.0 抛出以下异常:
无法为表“slowestQueryTimeTable”创建更新,引用流:在执行计划“occurredFailure”中找不到queryTimeStream
错误消息并不是很有用,因为如果我删除表'slowestQueryTimeTable' 和与之相关的任何表达式,剩余的查询表达式将成功验证,这意味着确实找到了流'queryTimeStream'。
你能帮我调试这个异常吗?