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Difference between revisions of "Accessing a service"
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* and add the Handler type to the client package. | * and add the Handler type to the client package. | ||
* | * | ||
− | * Test | + | * Test the example in the Rich UI Preview tab |
* by typing valid input into the first text box; for example: | * by typing valid input into the first text box; for example: | ||
* 5, 12, 4 | * 5, 12, 4 | ||
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import dojo.widgets.DojoTextField; | import dojo.widgets.DojoTextField; | ||
− | handler | + | handler MyHandler type RUIhandler{initialUI =[ui], |
onConstructionFunction = start, | onConstructionFunction = start, | ||
cssFile = "css/ProjectInEDT.7.css", | cssFile = "css/ProjectInEDT.7.css", |
Revision as of 16:42, 9 February 2012
Contents
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
// 1. declare the service-access variable myService MyServiceType?{@dedicatedService} // 2. call the service call myService.theFunction() returning to theCallBack onException theExceptionHandler; /* * Example: create a new EGL project for * "Web 2.0 application with services". Add the * the Service type shown next to the server package, * and add the Handler type to the client package. * * Test the example in the Rich UI Preview tab * by typing valid input into the first text box; for example: * 5, 12, 4 */ // the file with a Service type package server; Service MyServiceType // variables and constants can be here function calculate(myScores Int[] in) returns (Decimal(4,2)) numberOfScores, i, mySum Int; numberOfScores = myScores.getSize(); for (i from 1 to numberOfScores by 1) mySum = myScores[i] + mySum; end return(mySum/numberOfScores); end end // the file with a Handler type 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 MyHandler 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
Accessing an EGL REST-RPC service
Accessing a third-party REST service
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