To view recording of this webinar please use below URL:
http://wso2.com/library/webinars/2015/07/real-time-analytics-from-data-to-actions-in-milliseconds/
In this session, Suho - technical lead at WSO2, will discuss
Introduction to real-time processing
Real-time processing patterns
Scalable distributed real-time processing
Real-time features in WSO2 Complex Event Processor
Integration of Apache Storm
19. define stream SoftDrinkSales
(region string, brand string, quantity int,
price double);
from SoftDrinkSales
select brand, avg(price*quantity) as avgCost,‘USD’ as currency
insert into AvgCostStream
from AvgCostStream
select brand, toEuro(avgCost) as avgCost,‘EURO’ as currency
insert into OutputStream ;
Enriching Streams
Using Functions
20. define stream SoftDrinkSales
(region string, brand string, quantity int,
price double);
from SoftDrinkSales[region == ‘USA’ and quantity > 99]
select brand, price, quantity
insert into WholeSales ;
from SoftDrinkSales#window.time(1 hour)
select region, brand, avg(quantity) as avgQuantity
group by region, brand
insert into LastHourSales ;
Filtering
Aggregation over 1 hour
Other supported window types:
timeBatch(), length(), lengthBatch(), etc.
21. define stream Purchase (price double, cardNo long,place string);
from every (a1 = Purchase[price < 10] ) ->
a2 = Purchase[ price >10000 and a1.cardNo == a2.cardNo ]
within 1 day
select a1.cardNo as cardNo, a2.price as price, a2.place as place
insert into PotentialFraud ;
22. define stream StockStream
(symbol string, price double, volume int);
partition by (symbol of StockStream)
begin
from t1=StockStream,
t2=StockStream [(t2[last] is null and t1.price < price) or
(t2[last].price < price)]+
within 5 min
select t1.price as initialPrice, t2[last].price as finalPrice,
t1.symbol
insert into IncreaingMyStockPriceStream
end;
24. define stream Purchase (price double, cardNo long, place string);
define stream CardUserStream (name string, cardNo long) ;
define table CardUserTable (name string, cardNum long) ;
from Purchase#window.length(1) join CardUserTable
on Purchase.cardNo == CardUserTable.cardNum
select Purchase.cardNo as cardNo,
CardUserTable.name as name,
Purchase.price as price
insert into PurchaseUserStream ;
from CardUserStream
select name, cardNo as cardNum
update CardUserTable
on CardUserTable.name == name ;
Similarly insert into and
delete are also supported!
25. ●
●
●
●
define stream SalesStream
(brand string, price double, currency string);
from SalesStream
select brand, custom:toUSD(price, currency) as priceInUSD
insert into OutputStream ;
Reffer with namespace