Accessing a service

EDT version .7

In EDT version .7, a service is accessible only from a Rich UI application, and your task follows this pattern:  declare a service-access variable and use it in a call statement.

Accessing a dedicated service

// use a Service or Interface type to declare the service-access variable
myService MyServiceType?{@dedicatedService}
 
// use the variable to call the service
call myService.theOperation() returning to theCallBack
                onException theExceptionHandler;
 
/*
 * create a new EGL project for "web 2.0 application with services". 
 * add the following 
 * type valid input into the first text box; for example: 
 *        5, 12, 4
 */
 
package client;
 
import server.MyServiceType;
import org.eclipse.edt.rui.widgets.GridLayout;
import org.eclipse.edt.rui.widgets.TextField;
import org.eclipse.edt.rui.widgets.GridLayoutData;
import dojo.widgets.DojoButton;
import dojo.widgets.DojoTextField;
 
handler Test type RUIhandler{initialUI =[ui], 
             onConstructionFunction = start, 
             cssFile = "css/ProjectInEDT.7.css", 
             title = "MyHandler"}
 
   ui GridLayout{columns = 3, rows = 4, cellPadding = 4, 
                 children =[myResult, myButton, scores]};
   scores TextField{layoutData = 
      new GridLayoutData{row = 2, column = 2}};
   myButton DojoButton{layoutData = 
      new GridLayoutData{row = 4, column = 2}, 
                         text = "Calculate", 
                         onClick ::= ui_onClick};
   myResult DojoTextField{layoutData = 
       new GridLayoutData{row = 4, column = 3}};
 
    function start()
 
    end
 
    function theExceptionHandler(exp AnyException in)
        SysLib.writeStdOut(exp.message);
    end
 
    function theCallBack(retResult decimal(4, 2) in)
        myResult.text = retResult;
    end
 
    function ui_onClick(event Event in)
 
        inputLength int = scores.text.length();
 
        myDelimiters string = ", ";
        myPosition int = 1;
        myToken string;
        myList int[];
        while(myPosition < inputLength)
            myToken = StringLib.getNextToken(scores.text, 
                      myPosition, myDelimiters);
            if(myToken != null)
                myList.appendElement(myToken as int);
            end
        end
        myService MyServiceType?{@DedicatedService};
        call myService.calculate(myList) returning to theCallBack
                onException theExceptionHandler;
    end
end

EDT version .8

// From a a Access a dedicated service
 
 
 
 
 
 
 
http HttpRest{request.uri="http:host\\myService"};
srvc IRest?;
srvc = ServiceLib.completeBind(srvc, http);

Accessing HTTP request headers

http HttpRest{};
http.request.headers = new Dictionary { param1 = "a value to pass to my service" };
srvc IRest?{@Resource {}};
srvc = ServiceLib.completeBind(srvc, http);

HTTP request and response

function invokeDoSomething()
    call srvc.doSomething() returning to serviceCallback;
end
 
function serviceCallback(returnValueOne String, callbackHttp IHTTP in)
  // process callback request or response
end