}
@Override
public FenceResponse fence(JournalInfo journalInfo, long epoch,
String fencerInfo) throws IOException {
FenceRequestProto req = FenceRequestProto.newBuilder().setEpoch(epoch)
.setJournalInfo(PBHelper.convert(journalInfo)).build();
try {
FenceResponseProto resp = rpcProxy.fence(NULL_CONTROLLER, req);
return new FenceResponse(resp.getPreviousEpoch(),
resp.getLastTransactionId(), resp.getInSync());