Hello,
in my application, EJBs and client application use value-objects to exchange data.
These value-objects encapsulate a java.util.HashMap instance and have the following methods to read and write.
public void set(propName,propVal);
public Object get(propName);
Now, I would like to modify the implementation of the above methods.
I would like them to have a different behavior depending on the fact that they are invoked on the server or on the client.
In particular, if they are invoked on the client, I want them to check a permission on a map, if they are invoked on the server, the Hashmap is directly accessed.
I thought at the following implementation:
public void set(String propName,Object val){
try {
Context ctx = new InitialContext();
Object visibleOnlyOnServer = ctx.lookup("java:/foo");
// If I am here I should be on the server
myHashMap.put(propName,val);
}catch(NamingException ne){
// I am on the client, because I cannot lookup
// the object, so check permissions first.
if (null!=permissionMap.get(propName)){
myHashMap.put(propName,val);
}else{
throw new RuntimeException("Operation not allowed");
}
}
}
Thanks for paying attention,
Ludovico Basili
