Hi All,
Does any one know how to make Synchronous calls using GWT.
Currently i am using GWT to build services, creating files like
com.app.client.MyService.java
//One function in this interface
doMyTask(ParamTpye myparams) throws ClientException;
com.app.client.MyServiceAsync.java
//One function in this interface
doMyTask(ParamTpye myparams,AsyncCallback callback) throws
ClientException;
com.app.server.MyServiceImpl.java
//One function in this class
doMyTask(ParamTpye myparams) throws ClientException;
now i create the service and call
MyServiceAsync userService = (MyServiceAsync)
GWT.create(MyService.class);
ServiceDefTarget endpoint = (ServiceDefTarget) userService;
String moduleRelativeURL = GWT.getModuleBaseURL() + "MyService";
endpoint.setServiceEntryPoint(moduleRelativeURL);
userService.doMyTask(MyParams,CallBackObject);
This piece of code is working fine as a ASYNCHRONOUS call.
Then i tried making is synchronous call using following code(i don't
know if its valid or not)
instead of using MyServiceAsync i am using MyService
MyService userService = (MyService) GWT.create(MyService.class);
ServiceDefTarget endpoint = (ServiceDefTarget) userService;
String moduleRelativeURL = GWT.getModuleBaseURL() + "MyService";
endpoint.setServiceEntryPoint(moduleRelativeURL);
userService.doMyTask(MyParams);
But call to doMyTask throw following exception.
java.lang.ClassCastException in MyService_Proxy.
So i guess this is not the way to make synchronous call in GWT
Can any one point me how to do that. Or its not possible at all in
GWT.
Thanks in advance.,
Ravi.
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