@Override
    public Future<Message> readIndex(final Endpoint endpoint, final ReadIndexRequest request, final int timeoutMs,
                                     final RpcResponseClosure<ReadIndexResponse> done) {
        return invokeWithDone(endpoint, request, done, timeoutMs);
    }
Raft rpc service based bolt.

@author boyan (boyan@alibaba-inc.com)
@author jiachun.fjc
jraft-core/src/main/java/com/alipay/sofa/jraft/rpc/impl/core/DefaultRaftClientService.java