Re: [Shale]Best practice to add common code for all command actions for all backing beans

[Gary VanMatre]

There are several ways to handle this, maybe too many options:

>From a view controller:

   String userName = getBean("sessionScope.userName");

Or, create a managed bean with the parameter like a Struts form bean:


<managed-bean>
  <managed-bean-name>userParms</managed-bean-name>
  <managed-bean-class>myobject</managed-bean-class>
  <managed-bean-scope>request</managed-bean-scope>
  <managed-property>
        <property-name>userName</property-name>
        <value>#{sessionScope.userName}</value>
  </managed-property>
<managed-bean/>

  myobject object = (myobject) getBean("userParam");


Or, if you like the Struts dyna form:
<managed-bean>
  <managed-bean-name>userParms</managed-bean-name>
  <managed-bean-class>java.util.TreeMap</managed-bean-class>
  <managed-bean-scope>request</managed-bean-scope>
 
   <list-entries>
        <key-class>java.lang.String</key-class>
        <value-class>java.lang.String</value-class>
         <map-entry>
                       <key>userName</key>
                       <value>#{sessionScope.userName}</value>
         <map-entry>

   </list-entries>

<managed-bean/>


  myparms Map = (Map) getBean("userParam");



Gary

--- Begin Message ---

Hi all:

I am making small and halting progress with my Shale application and have 
this pretty fundamental question. Suppose my backing bean has this code:

public String getWorkList() {

        String username = (String) FacesContext.getCurrentInstance()
 .getExternalContext().getSessionMap()
                                        .get(Constants.userKey);
        String password = (String) FacesContext.getCurrentInstance()
 .getExternalContext().getSessionMap().get(Constants.pwKey);
        if ((username == null) || (password == null))
                return "loggedOff";
        ..etc.

I can see myself doing this check many times in many methods in many 
backing beans (which extend AbstractViewController). What is the 
appropriate way to implement this check - or for that matter any other 
common code? I can of course extend AbstractViewController and write this 
method there and all my beans can call it... but I kind of think there 
must be a better way..? (Something like Struts' RequestProcessor..) I 
thought perhaps this may be where preprocess() can come in handy - 
however, that method returns void. Plus it is within each backing bean and 
not common to all backing beans..

Thanks in advance,
Geeta

--- End Message ---

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