Inserting and Accessing Data in a Map¶ Purpose¶ This function creates a map and added values and checks whether values are available Prerequisites¶ Save this sample. If there is no syntax error, the following messages would be shown on the console Siddhi App MapExtensionSample successfully deployed. Executing the Sample¶ Start the Siddhi application by clicking on 'Run' If the Siddhi application starts successfully, the following messages would be shown on the console MapExtensionSample.siddhi - Started Successfully! Testing the Sample¶ You can publish data event to the file, through event simulator Open event simulator by clicking on the second icon or press Ctrl+Shift+I. In the Single Simulation tab of the panel, select values as follows: Siddhi App Name : MapExtensionSample Stream Name : SweetProductionStream Enter following values in the fields and send name: chocolate cake amount: 50.50 Viewing the Results¶ Messages similar to the following would be shown on the console. INFO {io.siddhi.core.query.processor.stream.LogStreamProcessor} - MapExtensionSample: Event: , StreamEvent{ timestamp=1513384974698, beforeWindowData=null, onAfterWindowData=null, outputData=[true, false], type=CURRENT, next=null} @app:name("MapExtensionSample") @app:description('Insert values into a map and access') @sink(type='log') define stream CheckedMapStream(isMap1 bool, isMap2 bool); define stream SweetProductionStream (name string, amount double); @info(name = 'query1') from SweetProductionStream select name, amount, map:create() as tmpMap insert into tmpStream; @info(name = 'query2') from tmpStream select name, amount, map:put(tmpMap,name,amount) as map1 insert into outputStream; @info(name = 'query3') from outputStream select map:isMap(map1) as isMap1, map:isMap(name) as isMap2 insert into CheckedMapStream;