On Mon, May 13, 2013 at 8:38 PM, Lasantha Fernando <[email protected]>wrote:
> Hi Pradeep, > > Regarding the configuration for transport adaptors ( > <builder:from></builder:from>), the properties and the number of > properties will change depending on the transport adaptor type. > eg: For FIX, there might be additional parameters depending on the message > structure, or for JMS, there will be topics etc. > yes you are right. But, still you can get rid of property elements. The trick is to inject any element field in to actual implementation class. The concrete implementation knows how to interpret them, right.? The config builder should act as a framework, where it reads the elements and inject them in to the underlying concrete impl. for an example you can refer this [1]. and how do you allow users to configure their own builder. ? (not sure whether this question is relevant at all, but felt like it as an extension point) [1] https://svn.wso2.org/repos/wso2/carbon/kernel/trunk/distribution/kernel/carbon-home/repository/conf/tomcat/catalina-server.xml please use default XML namespace in your elements as well. > > So we thought having a generic approach of having a property name and > value would be cleaner. > > On 13 May 2013 18:46, Pradeep Fernando <[email protected]> wrote: > >> >> >> >> On Mon, May 13, 2013 at 6:40 PM, Pradeep Fernando <[email protected]>wrote: >> >>> Hi, >>> >>> Is it possible to get rid of property elements, >>> >>> eg: <streamName>analytics_statistics</streamName> >>> >>> This way, the one who process the xml should have the knowledge of how >>> to process the stuff. >>> >>> >>> thanks, >>> --pradeep >>> >>> >>> On Mon, May 13, 2013 at 6:20 PM, Lasantha Fernando <[email protected]>wrote: >>> >>>> Hi all, >>>> >>>> For CEP 3.0.0 we are keeping separate configuration files for the event >>>> builder component which will be saved as an XML file. The event builder >>>> component will basically subscribe to a Transport Adaptor and map from a >>>> supported format like XML, Event, JSON or Text to an event stream/Siddhi >>>> stream. We came up with a sample configuration syntax below [1]. >>>> >>>> Please give your comments, suggestions on the syntax ( readability, >>>> easy to understand, generic enough to support future extensions etc.) >>>> >>> >> what are the supported extension points of this configuration/use-case. >> Can't figure out just by looking at the config. >> > > The usecases for this configuration will include, > > - supporting different mappings > > e.g. for XML it might be something like > > <builder:mapping type="xml" prefix="quotedata" namespace=" > http://ws.cdyne.com/"/> > <builder:property name="price" > xpath="//quotedata:StockQuoteEvent/quotedata:LastTradeAmount" > type="java.lang.Double"/> > <builder:property name="symbol" > xpath="//quotedata:StockQuoteEvent/quotedata:StockSymbol" > type="java.lang.String"/> > </builder:mapping> > > we need to support XML,JSON,Tuple(Event/WSO2Event),Text,Map at the least. > > - supporting different configurations for different transport adaptor types > - Currently, the information in <builder:to></builder:to> will be used by > Siddhi engine to receive events as object arrays and other components will > be receiving wso2 events. So catering for those two types by this > configuration is needed at the least. > > Thanks for your suggestions.. :-) > > Thanks, > Lasantha > > >> >> >>> >>>> [1] >>>> >>>> <?xml version="1.0" encoding="UTF-8"?> >>>> <builder:eventBuilder xmlns:builder=" >>>> http://wso2.org/carbon/eventbuilder";> >>>> <builder:from transportAdaptortype="wso2event" >>>> transportAdaptorName="wso2eventadaptor"> >>>> <builder:property >>>> name="streamName">analytics_Statistics</builder:property> >>>> <builder:property name="version">1.3.0</builder:property> >>>> </builder:from> >>>> <builder:mapping type="wso2event"> >>>> <builder:property> >>>> <builder:from name="price" type="payload"/> >>>> <builder:to name="stockPrice" type="double"/> >>>> </builder:property> >>>> <builder:property> >>>> <builder:from name="symbol" type="metadata"/> >>>> <builder:to name="symbol" type="string"/> >>>> </builder:property> >>>> </builder:mapping> >>>> <builder:to streamName="stockStream" version="1.0.0"/> >>>> </builder:eventBuilder> >>>> >>>> Thanks, >>>> Lasantha >>>> >>>> -- >>>> *Lasantha Fernando* >>>> Software Engineer - Data Technologies Team >>>> WSO2 Inc. http://wso2.com >>>> >>>> email: [email protected] >>>> mobile: (+94) 71 5247551 >>>> >>>> _______________________________________________ >>>> Dev mailing list >>>> [email protected] >>>> http://wso2.org/cgi-bin/mailman/listinfo/dev >>>> >>>> >>> >>> >>> -- >>> *Pradeep Fernando* >>> Member, Management Committee - Platform & Cloud Technologies >>> Senior Software Engineer;WSO2 Inc.; http://wso2.com >>> >>> blog: http://pradeepfernando.blogspot.com >>> m: +94776603662 >>> >> >> >> >> -- >> *Pradeep Fernando* >> Member, Management Committee - Platform & Cloud Technologies >> Senior Software Engineer;WSO2 Inc.; http://wso2.com >> >> blog: http://pradeepfernando.blogspot.com >> m: +94776603662 >> > > > > -- > *Lasantha Fernando* > Software Engineer - Data Technologies Team > WSO2 Inc. http://wso2.com > > email: [email protected] > mobile: (+94) 71 5247551 > -- *Pradeep Fernando* Member, Management Committee - Platform & Cloud Technologies Senior Software Engineer;WSO2 Inc.; http://wso2.com blog: http://pradeepfernando.blogspot.com m: +94776603662
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