[jira] Created: (AXIS-2073) MessageContext getPropertyNames is broken

["Aaron Hamid (JIRA)" <ax...@ws.apache.org>]

MessageContext getPropertyNames is broken
-----------------------------------------

         Key: AXIS-2073
         URL: http://issues.apache.org/jira/browse/AXIS-2073
     Project: Apache Axis
        Type: Bug
  Components: Basic Architecture  
    Versions: 1.1    
 Environment: Operating System: Other
Platform: Other
    Reporter: Aaron Hamid
 Assigned to: Axis Developers Mailing List 


The getPropertyNames() call on the MessageContext object made available to a 
jax-rpc GenericHandler subclass handler in handleRequest() does NOT enumerate 
all the property names.  getProperty() calls will return values for properties 
which have been set, but are NOT visible through getPropertyNames().

My hunch is that since the get() call on LockableHashtable inspects the parent 
Hashtable, that the keySet() method, which is not overridden, does NOT inspect 
the parent Hashtable, and is returning an empty keyset.

For my test, properties are set using the _setProperty() call on either a 
client Stub object, or Call object.

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[jira] Commented: (AXIS-2073) MessageContext getPropertyNames is broken

["Aaron Hamid (JIRA)" <ax...@ws.apache.org>]

    [ http://issues.apache.org/jira/browse/AXIS-2073?page=comments#action_12314171 ] 

Aaron Hamid commented on AXIS-2073:
-----------------------------------

Hi guys, can we make the implementation of getAllPropertyNames the default for getPropertyNames?  Is there a reason to not expose all keys in the MessageContext getPropertyNames (as even they are accessible through getProperty())?

For example, I have a JAX-RPC style handler like this:

public boolean handleRequest(javax.xml.rpc.handler.MessageContext context) {
    Iterator it = context.getPropertyNames();
    HashMap map = new HashMap();
    while (it.hasNext()) {
      String s = (String) it.next();
      map.put(s, context.getProperty(s));
    }
    ...
}

and a client which does:

MyApp app = new MyAppLocator().getMyApp();
app._setProperty("foo", "bar");

The result is that any property set on the stub (e.g. "foo") will not be visible in MessageContext object presented to the handler (even though it will be accessible through getProperty()).  Since javax.xml.rpc.handler.Message context only exposes getPropertyNames(), I must cast to the Apache implementation in order to call getAllPropertyNames.  Can we just make that implementation the default?

Here's a from-memory patch:

-    /**
-     * Returns an <code>Iterator</code> view of the names of the properties in
-     * this <code>MessageContext</code>.
-     *
-     * @return an <code>Iterator</code> over all property names
-     */
-    public java.util.Iterator getPropertyNames() {
-        // fixme: this is potentially unsafe for the caller - changing the
-        //  properties will kill the iterator. Consider iterating over a copy:
-        // return new HashSet(bag.keySet()).iterator();
-        return bag.keySet().iterator();
-    }
-
    /**
     *  Returns an Iterator view of the names of the properties 
     *  in this MessageContext and any parents of the LockableHashtable
     *  @return Iterator for the property names
     */
-    public java.util.Iterator getAllPropertyNames() {
+    public java.util.Iterator getPropertyNames() {
        return bag.getAllKeys().iterator();
    }

Note that this (somewhat) resolves the issue in the comment of the old getPropertyNames() because the implementation of getAllKeys() performs a copy of the key set.  Also note that this patch is not particularly sensitive to preserving semantics in some backward-compatible way...one may want to preserve the existing functionality of getPropertyNames under something like getImmediatePropertyNames, but my hunch is that this has no value).

> MessageContext getPropertyNames is broken
> -----------------------------------------
>
>          Key: AXIS-2073
>          URL: http://issues.apache.org/jira/browse/AXIS-2073
>      Project: Apache Axis
>         Type: Bug
>   Components: Basic Architecture
>     Versions: 1.1
>  Environment: Operating System: Other
> Platform: Other
>     Reporter: Aaron Hamid
>     Assignee: Axis Developers Mailing List

>
> The getPropertyNames() call on the MessageContext object made available to a 
> jax-rpc GenericHandler subclass handler in handleRequest() does NOT enumerate 
> all the property names.  getProperty() calls will return values for properties 
> which have been set, but are NOT visible through getPropertyNames().
> My hunch is that since the get() call on LockableHashtable inspects the parent 
> Hashtable, that the keySet() method, which is not overridden, does NOT inspect 
> the parent Hashtable, and is returning an empty keyset.
> For my test, properties are set using the _setProperty() call on either a 
> client Stub object, or Call object.

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