@Override
public ApiRoleConfigGroupList readRoleConfigGroups() {
System.out.println("calling " + this.getClass().getInterfaces()[0].getName() + "#" + Thread.currentThread().getStackTrace()[1].getMethodName());
ApiRoleConfigGroupList roleConfigGroups = new ApiRoleConfigGroupList();
ApiRoleConfigGroup group1 = new ApiRoleConfigGroup();
group1.setName("DefaultNamenode");
group1.setRoleType("NAMENODE");
ApiRoleConfigGroup group2 = new ApiRoleConfigGroup();
group2.setName("DefaultDatanode");
group2.setRoleType("DATANODE");
ApiRoleConfigGroup group3 = new ApiRoleConfigGroup();
group3.setName("DefaultNodeManager");
group3.setRoleType("NODEMANAGER");
roleConfigGroups.add(group1);
roleConfigGroups.add(group2);
roleConfigGroups.add(group3);
return roleConfigGroups;
}