GLUE Calculator Example

• We start with our interface, ICalculator.  This simply defines the methods that we want our server to have.

/*
 * ICalculator.java
 *

 * Created on September 9, 2003, 9:46 PM
 * @author  Brandan Jones
 * @version
 */
 
 

public interface ICalculator
  {
  float add( float x, float y );
  float subtract( float x, float y );
  float multiply( float x, float y );
  float divide( float numerator, float denominator );
  }
 

•  Next, we provide an implementation.


public class Calculator implements ICalculator
  {
  public float add( float x, float y )
    {
    return x + y;
    }

  public float subtract( float x, float y )
    {
    return x - y;
    }

  public float multiply( float x, float y )
    {
    return x * y;
    }

  public float divide( float numerator, float denominator )
    {
    return numerator / denominator;
    }
  }

• At this point we have a very generic service.  Nothing in this interface or class is web service specific, much less GLUE specific.  So we have a server class, CalcServer, that ties our interface and class to a web serivce.  Note how simple it is.
• A couple of import statements that use classes in the GLUE.jar.
• A call to HTTP.startup, which defines our WSDL link.
• A call to Registry.publish, which binds our calculator service.
• From here, GLUE handles the WSDL, tie classes, marshalling and unmarshalling of XML, etc.


import electric.registry.Registry;
import electric.server.http.HTTP;

public class CalcServer
  {
  public static void main( String[] args ) throws Exception
    {
    HTTP.startup( "http://localhost:8004/glue" );
    Registry.publish( "calculator", new Calculator() );
    }
  }
 

Created by:  Brandan Jones September 10, 2003