Listing AMX MBean Properties

The displayAllProperties() demonstrates how to list AMX MBean properties.

Example 16–10 Listing AMX MBean Properties

[...]
getProperties( final PropertiesAccess pa )
{
    final HashMap m = new HashMap();
    final String[] names = pa.getPropertyNames();
    for( int i = 0; i < names.length; ++i )
    {
        m.put( names[ i ], pa.getPropertyValue( names[ i ] ) );
    }
    return( m );
}
public void
displayAllProperties( )
{
    final Iterator iter    = getQueryMgr().queryAllSet().iterator();
    while ( iter.hasNext() )
    {
        final AMX amx = (AMX)iter.next();
        if ( amx instanceof PropertiesAccess )
        {
            final PropertiesAccess pa = (PropertiesAccess)amx;
            final Map    props    = getProperties( pa );
            if ( props.keySet().size() != 0 )
            {
                println( "\nProperties for:
                    " + Util.getObjectName( AMX)pa ) );
                println( SampleUtil.mapToString(getProperties(pa), "\n") );
            }
        }
    }
}
[...]

The displayAllProperties() method uses another Samples method, getProperties(). This method creates an instance of the com.sun.appserv.management.config.PropertiesAccess interface, and calls its getPropertyNames() method to obtain the names of all the properties for a given AMX MBean. For each property name obtained, its corresponding value is obtained by calling PropertiesAccess.getPropertyValue().

The displayAllProperties() method calls the com.sun.appserv.management.base.QueryMgr.queryAllSet() method to obtain a set of all the AMX MBeans present in the domain. All AMX MBeans that have properties obligatorily extend the PropertiesAccess interface. Any MBean found to extend PropertiesAccess is passed to the getProperties() method, and the list of property values returned is printed onscreen.