On Fri, Aug 1, 2014 at 4:10 PM, Tishan Dahanayakage <tis...@wso2.com> wrote:
> Hi all, > > As per requirements of the new siddhi implementation we have changed the > event object model. Tentative class diagram of new event object model is > shown below with only important attributes and methods. > > *Event*: High-level interface which is exposed to the user. > > *ComplexEvent*: High-level common interface to be used inside Siddhi > implementation > > *StreamEvent*: Input event type of Siddhi in implementation level. It is > worthy to note next attribute which offers event chaining capability to > StreamEvents. > This is to remove continuous creation of object arrays during event processing > > *InnerStreamEvent*: Event type which is used by executors to process. > Here data is divided into three categories. > 1. Before window data - event data which will be used by processors before > a window occurs. > 2. On after window data - event data which will be used on and after > window occur > 3. Out data - output data after processing > Data will not be duplicated among these categories. When duplication > happens priority will be given in the order of outData>on > afterWindowData>beforeWindowData. So out data will always contain > processing results which can be directly sent forward. Also with this new > model we can only forward the data needed for processing leaving behind > unwanted data. This will save both memory and processing time. > > *StateEvent*: To facilitate sequence and patterns. > Also for joins > > *MetaStreamEvent*: This is container class to store information needed of > InnerStreamEvent creation and configuring Processors according to that. > > *MetaStateEvent*: This contains a collection of MetaStreamEvents to > handle conversion of state events. > > To handle memory issues in event conversion we are planing to use object > pools. Corresponding to this event model change Siddhi event processing > process has also changed. Will update on that separately. > +1 Looks good keep up the good work Regards Suho -- > Tishan Dahanayakage > Software Engineer > WSO2, Inc. > Mobile:+94 716481328 > > Disclaimer: This communication may contain privileged or other > confidential information and is intended exclusively for the addressee/s. > If you are not the intended recipient/s, or believe that you may have > received this communication in error, please reply to the sender indicating > that fact and delete the copy you received and in addition, you should not > print, copy, re-transmit, disseminate, or otherwise use the information > contained in this communication. Internet communications cannot be > guaranteed to be timely, secure, error or virus-free. The sender does not > accept liability for any errors or omissions. > -- *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 | 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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