How to get Hawk JMX data from BW

try {
    Set<objectinstance> result = conn.queryMBeans(new ObjectName("com.tibco.bw:key=engine,name=*"), null);
    if (result.size() > 0) {
     ObjectInstance tib = result.iterator().next();
     TabularDataSupport getActivities = (TabularDataSupport) conn.invoke(tib.getObjectName(), "GetActivities", new Object[] { null }, null);
     TabularDataSupport getProcesses = (TabularDataSupport) conn.invoke(tib.getObjectName(), "GetProcesses", new Object[] { 0, null, 0, 0, null }, null);
           
 for (Object _row : getProcesses.values()) {
     BWStats bw = new BWStats();
            CompositeData row = (CompositeData)_row;
            bw.process = (String) row.get("MainProcessName"); 
            bw.activity = (String) row.get("CurrentActivityName");
            bw.clazz = "IN";
            bw.status = (String) row.get("Status");
            bw.duration0 = (Long) row.get("Duration");  
            stats.bwStats.add(bw);
        }
           
        for (Object _row : getActivities.values()) {
            CompositeData row = (CompositeData)_row;
            BWStats bw = new BWStats();
            bw.process = (String) row.get("ProcessDefName"); 
            bw.activity = (String) row.get("Name");
            bw.clazz = (String) row.get("ActivityClass");
            bw.duration0 = (Long) row.get("ExecutionTime");
            bw.duration1 = (Long) row.get("ElapsedTime");
            bw.count = (Long) row.get("ExecutionCount");   
            stats.bwStats.add(bw);
    }
}
catch (Exception exc) {}