Developing stable and efficient web applications for all devices.

JAX-WS Handler Chain: messages interceptor

Aug 29, 10 by Juan Lebrijo about Web Services, blog, Java

We want to intercept the WS input and output. In order to:

Logging any part in the message
Registering sent messages
Add security controls
....

Here we are going to do a input/output WS example log. We annotate the WS with Handler Chain descriptor:

@WebService
@HandlerChain(file="src/META-INF/handlerChain.xml")
public class Hello {
@WebMethod
    public String sayHello(String name) {
        return "Hello, "+name+".";
    }
}

It will have the following contents:

  
     
        
         lebrijo.handlers.WSHandler

WSHandler class will implements the SOAPHandler interface:

public class WSHandler implements SOAPHandler {  
 
     public Set getHeaders() {  
         return null;  
     }  
  
     public boolean handleFault(SOAPMessageContext context) {  
         logToSystemOut(context);  
         return true;  
     }  
 
     public boolean handleMessage(SOAPMessageContext context) {  
         logToSystemOut(context);  
         return true;  
     }  

     private void logToSystemOut(SOAPMessageContext smc) {  
         Boolean outboundProperty = (Boolean) smc.get(MessageContext.MESSAGE_OUTBOUND_PROPERTY);  
   
         if (outboundProperty.booleanValue()) {  
             System.out.println("Outgoing message:");  
         } else {  
             System.out.println("Incoming message:");  
         }  
   
         SOAPMessage message = smc.getMessage();  
         try {  
             message.writeTo(System.out);  
         } catch (Exception e) {  
             System.out.println("Exception in handler: " + e);  
         }  
     }

	public void close(MessageContext context) {
		// TODO Auto-generated method stub
		
	}

JAX-WS Handler Chain: Interceptando los mensajes

Aug 29, 10 by Juan Lebrijo about Web Services, blog, Java

Queremos interceptar el WS en la salida y la entrada. Esto puede ser útil para:

Hacer log de alguna parte del mensaje
Llevar registro de mensajes enviados
Controles de seguridad añadidos
....

Hoy vamos a hacer un ejemplo de log de la entrada/salida del WS. Anotamos el WS con el descriptor de la cadena de manejadores:

@WebService
@HandlerChain(file="src/META-INF/handlerChain.xml")
public class Hello {
@WebMethod
    public String sayHello(String name) {
        return "Hello, "+name+".";
    }
}

Que tendrá el contenido siguiente:

  
     
        
         lebrijo.handlers.WSHandler

La clase WSHandler implementará la interfaz SOAPHandler:

public class WSHandler implements SOAPHandler {  
 
     public Set getHeaders() {  
         return null;  
     }  
  
     public boolean handleFault(SOAPMessageContext context) {  
         logToSystemOut(context);  
         return true;  
     }  
 
     public boolean handleMessage(SOAPMessageContext context) {  
         logToSystemOut(context);  
         return true;  
     }  

     private void logToSystemOut(SOAPMessageContext smc) {  
         Boolean outboundProperty = (Boolean) smc.get(MessageContext.MESSAGE_OUTBOUND_PROPERTY);  
   
         if (outboundProperty.booleanValue()) {  
             System.out.println("\nOutgoing message:");  
         } else {  
             System.out.println("\nIncoming message:");  
         }  
   
         SOAPMessage message = smc.getMessage();  
         try {  
             message.writeTo(System.out);  
         } catch (Exception e) {  
             System.out.println("Exception in handler: " + e);  
         }  
     }

	public void close(MessageContext context) {
		// TODO Auto-generated method stub
		
	}

ADF View: Master/Detail editable with LOVs, and Excel exporting option

Aug 28, 10 by Juan Lebrijo about JDeveloper, blog

Based on an earlier post where show how to make a master detail page, today we will add a box where we will be able to modify the aployee data. It is useful too to know how to make List of Values (combos) with this technology, and see an example of how to export the detail table to Excel. Example application in HRApplication.zip. The same way than the last article we will create:

an "ADF Read-only Form" from the departmentsFindAll binding in the top part.
an "ADF table Read-Only" from the departmentsFindAll > employeesList. Which surround with a "Panel Collection" component to see more features of ADF.
With a new Panel Spliter, create a right side box, where we put the edition form.

So drop the departmentsFindAll > employeesList, and select the "ADF Form" with Submit button:

We can meke this form editable dropping the mergeEmployees method to the submit button, and pointing where in the data tree will make the merge:

Change the text of the button to "Save" it will be more intuitive. Now we will create the list of values of departments. Drop the control departamentsFindAll > EmployeesList > departments > departmentId over the form, and select the "ADF Select One Choice ...":

In the "menu" zone of the "Panel collection" we will create a Menu (called File) and a menuItem called "Export to Excel". Where we will drop an "Export Collection Action Listener". Of the only existent type "excelHTML", and for the identifier, the table we want to export:

Save, and with right button select "Run" to test the browseEditable.jspx. We can see how:

To modify employee data.
To select in the Departments LOV.
To export to excel datasheets easily.