Topic outline

• Using the Native API for Java

  Using the Native API for Java

  Content Type
  Video

  Duration
  5m

  Level
  Introductory

  Learn how to use the Native API for Java in InterSystems IRIS® data platform to access data directly from your Java application or to call class methods and routines. To use the Native API in your Java application, you will need JDK 1.7 or 1.8 installed on your system.

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• Code Used in This Video

  Code Used in This Video

  Reference	Timestamp	Code
  Java class that connects to InterSystems IRIS and uses the Native API to access globals, class methods, and routines.	n/a	Begin code. package irisPackage; import com.intersystems.jdbc.IRISConnection; import com.intersystems.jdbc.IRIS; import com.intersystems.jdbc.IRISIterator; import com.intersystems.jdbc.IRISDataSource; public class nativeJavaClass { public static void main (String [ ] args) { int superserverPort = 16951; String ip "104.197.75.13"; String namespace = "USER"; String username = "SuperUser"; String password = "SYS"; try { IRISDataSource ds = new IRISDataSource ( ) ; ds.setURL ( "jdbc:IRIS://" + ip + ":"" + superserverPort + "/" + namespace); ds.setUser (username); ds.setPassword (password); IRISConnection dbconnection = (IRISConnection) ds.getConnection (); System.out.println("Connectedto InterSystems IRIS via JDBC."); // Create irisNative object IRIS irisNative = IRIS.createIRIS(dbconnection); // Setting and getting a global irisNative.set(1582.32 , "^stocks" , "AMZN"); irisNative.set(94.18 , "^stocks" , "MSFT"); irisNative.set(325.61 , "^ stocks" , "TSLA"); Double amznPrice = irisNative.getDouble ("^stocks" , "AMZN"); System.out.println("The current price of AMZN is $" + amznPrice); // Iterating over a global IRISIterator iter = irisNative.getIRISIterator("^stocks"); System.out.println("walk forwards"); while (iter.hasNext()) { String subscript = iter.next(); System.out.println("The current price of " + subscript + " is $" + iter.getValue()); } // Calling a class method String newStockName = irisNative.classMethodString("%Library.PopulateUtils", "StringMin" , 3,4).toUpperCase(); Double newStockPrice = irisNative.classMethodDouble("%Library.PopulateUtils", "Float", 0,1000,2); irisNative.set(newStockPrice,"^stocks",newStockName); System.out.println("Created new stock " + newStockName + " at current value $" + newStockPrice); // Calling a routine String irisVersion = irisNative.functionString("PrintVersion", "^StocksUtil"); System.out.println("The current version of InterSystems IRIS is " + irisVersion); // Close connection and native object irisNative.close(); dbconnection.close(); } catch (Exception ex) { System.out.println(ex.getMessage()); } } } End code.
  ObjectScript equivalent for setting and getting a global	3:47	Begin code. set ^stocks("AMZN") = 1582.32 set ^stocks("MSFT") = 94.18 set ^stocks("TSLA") = 325.61 set amznPrice = $get(^stocks("AMZN")) End code.
  ObjectScript equivalent for iterating over a global	4:05	Begin code. set subscript = "" for { set sub = $ORDER(^stocks(sub), 1, val) quit:(sub = "") write !, "The current price of ", sub, " is $", val } End code.
  ObjectScript equivalent for calling a class method	4:32	Begin code. set newStockName = $ZCONVERT(##class(%PopulateUtils).StringMin(3,4), "U") set newStockPrice = ##class(%PopulateUtils).Float(0,1000,2) set ^stocks(newStockName) = newStockPrice write "Created new stock " _ newStockName _ " at current value $" _ newStockPrice End code.
• What's Next?

  What's Next?

  Connect your Java applications to InterSystems® products and technologies with Connecting Java Applications to InterSystems Products (learning path, 3h)