Hi Suho, The following is sample execution plan query. Here we are getting one result as value. Can I get three values using this kind of queries?
*The Query* [1] <https://github.com/apache/stratos/blob/master/extensions/cep/artifacts/executionplans/SecondDerivativeOfHealthRequest.xml> from health_second_der_concat [health_description == 'memory_consumption'] *#window.stratos:secondDerivative(1 min, value)* select cluster_id, cluster_instance_id, network_partition_id, value as second_derivative_memory_consumption insert into second_derivative_memory_consumption_stats partition by health_second_der_cluster_partition; *The annotation in SecondDerivativeWindowProcessor* [2] <https://github.com/apache/stratos/blob/master/extensions/cep/stratos-cep-extension/src/main/java/org/apache/stratos/cep/extension/SecondDerivativeFinderWindowProcessor.java> @SiddhiExtension(namespace = "stratos", function = "secondDerivative") Here they are getting only one value. Can you point me out a way that I can have all three here? Thanks *T. Pranavan* *BSc Eng Undergraduate| Department of Computer Science & Engineering ,University of Moratuwa* *Mobile| *0775136836 On 9 August 2015 at 09:27, Sriskandarajah Suhothayan <s...@wso2.com> wrote: > Thats possible, you have to have 3 dummy fields on the input stream which > you can populate at the window with the coefficients and output the > events. Let me know if there are specific issues > > Suho > > On Sun, Aug 9, 2015 at 8:46 AM, Pranavan Theivendiram < > pranavan...@cse.mrt.ac.lk> wrote: > >> Hi Suho, >> >> In my case, I am generating a second order polynomial(Three >> coefficients). I am taking inputs of a 10 minute window.(A sliding window- >> every one minute , the window will be get update. New events will come into >> the window and the oldest events will get removed from the window) >> >> Thanks >> >> *T. Pranavan* >> *BSc Eng Undergraduate| Department of Computer Science & Engineering >> ,University of Moratuwa* >> *Mobile| *0775136836 >> >> On 9 August 2015 at 08:40, Sriskandarajah Suhothayan <s...@wso2.com> >> wrote: >> >>> Time window is to buffer events and expire based on some condition >>> (time/length/etc), its not for creating new attributes by default. here the >>> expired events are generated to inform the other processes the event have >>> expired and hence they can do adjust their calculations based on that. If >>> you dont have a avg() kind of aggregate functions on select then you dont >>> need to send expired events. >>> >>> For you predictions how many inputs you have (input attributes used for >>> production) and how many outputs will be generated (is it only one co >>> efficient value)? >>> If you are generating one value then you have to extend an Output >>> aggregator. e.g.[1] >>> >>> Suho >>> >>> [1] >>> https://svn.wso2.org/repos/wso2/carbon/platform/branches/turing/dependencies/commons/siddhi/2.0.0-wso2v5/modules/siddhi-core/src/main/java/org/wso2/siddhi/core/query/selector/attribute/handler/avg/AvgOutputAttributeAggregatorDouble.java >>> >>> On Sat, Aug 8, 2015 at 5:14 PM, Pranavan Theivendiram < >>> pranavan...@cse.mrt.ac.lk> wrote: >>> >>>> Hi All, >>>> >>>> I am working on writing a custom TimeWindowProcessor (SlidingWindow) to >>>> handle the curvefitting prediction. I followed the this implementation [1] >>>> and referred this documentation[2]. In my case, I need to get the events >>>> received during the 10 mins and use it for the calculation of the curve >>>> fitting and set the co efficient of curve fitting as a event. I am finding >>>> it hard to understand how the input events will reach the window processors >>>> and how the output events are passed throughout and what is the purpose of >>>> the processevent method. Processevent method is called in the run method on >>>> the expired events in the TimeWindowProcessor class. But that is not the >>>> case I wanted. I want to simply remove the expired events, but rather >>>> calculate the curve coefficients on active events and to send the >>>> coefficient as output events. I am bit confused in flow and out flow to the >>>> TimeWindowProcessor class. >>>> >>>> If anyone can directly point out the input events in the >>>> TimeWindowProcessor class that would be a great help for me.I really expect >>>> a help in the form of the tutorial or some explanations on this or pointing >>>> out some custom TimeWindowProcessor class. >>>> >>>> Note : I already have written evenformatters and executionplans. This >>>> is the point I got stucked. I really can`t find a good explanation about >>>> the TimeWindowProcessor class. >>>> >>>> [1] >>>> https://svn.wso2.org/repos/wso2/carbon/platform/branches/turing/dependencies/commons/siddhi/2.0.0-wso2v5/modules/siddhi-core/src/main/java/org/wso2/siddhi/core/query/processor/window/TimeWindowProcessor.java >>>> [2]https://docs.wso2.com/display/CEP300/Windows#Windows-timeWindow >>>> >>>> Thank you. >>>> >>>> >>>> *T. Pranavan* >>>> *BSc Eng Undergraduate| Department of Computer Science & Engineering >>>> ,University of Moratuwa* >>>> *Mobile| *0775136836 >>>> >>>> _______________________________________________ >>>> Dev mailing list >>>> Dev@wso2.org >>>> http://wso2.org/cgi-bin/mailman/listinfo/dev >>>> >>>> >>> >>> >>> -- >>> >>> *S. Suhothayan* >>> Technical Lead & Team Lead of WSO2 Complex Event Processor >>> *WSO2 Inc. *http://wso2.com >>> * <http://wso2.com/>* >>> lean . enterprise . middleware >>> >>> >>> *cell: (+94) 779 756 757 <%28%2B94%29%20779%20756%20757> | blog: >>> http://suhothayan.blogspot.com/ <http://suhothayan.blogspot.com/>twitter: >>> http://twitter.com/suhothayan <http://twitter.com/suhothayan> | linked-in: >>> http://lk.linkedin.com/in/suhothayan <http://lk.linkedin.com/in/suhothayan>* >>> >> >> > > > -- > > *S. Suhothayan* > Technical Lead & Team Lead of WSO2 Complex Event Processor > *WSO2 Inc. *http://wso2.com > * <http://wso2.com/>* > lean . enterprise . middleware > > > *cell: (+94) 779 756 757 <%28%2B94%29%20779%20756%20757> | blog: > http://suhothayan.blogspot.com/ <http://suhothayan.blogspot.com/>twitter: > http://twitter.com/suhothayan <http://twitter.com/suhothayan> | linked-in: > http://lk.linkedin.com/in/suhothayan <http://lk.linkedin.com/in/suhothayan>* >
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