INT-2412

removed priority enumeration from the 2.0 and 2.1 schema

fixed documentation, added tests

src/reference/docbook/channel.xml

@@ -596,7 +596,7 @@ payload to an Integer.
         <programlisting language="xml"><![CDATA[<int:channel id="priorityChannel">
     <int:priority-queue capacity="20"/>
 </int:channel>]]></programlisting>
-        By default, the channel will consult the <classname>MessagePriority</classname> header of the
+        By default, the channel will consult the <code>priority</code> header of the
         message. However, a custom <interfacename>Comparator</interfacename> reference may be
         provided instead. Also, note that the <classname>PriorityChannel</classname> (like the other types)
         does support the <code>datatype</code> attribute. As with the QueueChannel, it also supports a <code>capacity</code> attribute.

src/reference/docbook/message.xml

@@ -106,7 +106,7 @@
             </row>
             <row>
               <entry>PRIORITY</entry>
-              <entry>MessagePriority (an <emphasis>enum</emphasis>)</entry>
+              <entry>java.lang.Integer</entry>
             </row>
           </tbody>
        </tgroup>
@@ -190,28 +190,21 @@ assertEquals(123, message4.getHeaders().get("foo"));</programlisting>
       Finally, there are set methods available for the predefined headers as well as a non-destructive method for
       setting any header (MessageHeaders also defines constants for the pre-defined header names).
       <programlisting language="java">Message&lt;Integer&gt; importantMessage = MessageBuilder.withPayload(99)
-        .setPriority(MessagePriority.HIGHEST)
+        .setPriority(5)
         .build();
 
-assertEquals(MessagePriority.HIGHEST, importantMessage.getHeaders().getPriority());
+assertEquals(5, importantMessage.getHeaders().getPriority());
 
-Message&lt;Integer&gt; anotherMessage = MessageBuilder.fromMessage(importantMessage)
-        .setHeaderIfAbsent(MessageHeaders.PRIORITY, MessagePriority.LOW)
+Message&lt;Integer&gt; lessImportantMessage = MessageBuilder.fromMessage(importantMessage)
+        .setHeaderIfAbsent(MessageHeaders.PRIORITY, 2)
         .build();
 
-assertEquals(MessagePriority.LOW, anotherMessage.getHeaders().getPriority());
+assertEquals(2, lessImportantMessage.getHeaders().getPriority());
 </programlisting>
     </para>
     <para>
-      The <classname>MessagePriority</classname> is only considered when using a <classname>PriorityChannel</classname>
-      (as described in the next chapter). It is defined as an <emphasis>enum</emphasis> with five possible values:
-      <programlisting language="java">public enum MessagePriority {
-    HIGHEST,
-    HIGH,
-    NORMAL,
-    LOW,
-    LOWEST
-}</programlisting>
+      The <code>priority</code> header is only considered when using a <classname>PriorityChannel</classname>
+      (as described in the next chapter). It is defined as  <emphasis>java.lang.Integer</emphasis>.
     </para>
   </section>