code: public int setAvatar(String role, boolean noverification, String serviceName, String instance)
        throws IOException {
      Avatar dest;
      if (Avatar.ACTIVE.toString().equalsIgnoreCase(role)) {
        dest = Avatar.ACTIVE;
      } else if (Avatar.STANDBY.toString().equalsIgnoreCase(role)) {
        throw new IOException("setAvatar Command only works to switch avatar" +
        		" from Standby to Primary");
      } else {
        throw new IOException("Unknown avatar type " + role);
      }
      Avatar current = avatarnode.getAvatar();
      if (current == dest) {
        System.out.println("This instance is already in " + current + " avatar.");
      } else {
        try {
          avatarnode.quiesceForFailover(noverification);
        } catch (RemoteException re) {
          handleRemoteException(re);
        }
        avatarnode.performFailover();
        updateZooKeeper(serviceName , instance);
      }
      return 0;
    }
docs: Sets the avatar to the specified value