// IbvSge sge = new IbvSge();
            // sge.setAddr(disniRegion.getAddress());
            // sge.setLength(data.remaining());
            // sge.setLkey(disniRegion.getLocalKey());
            // sgeList.add(sge);
            //
            // sendWR.setSg_list(sgeList);
            // endpoint.postSend(Arrays.asList(sendWR)).execute().free();

        }
        return buffer;
    }

    /**
     * Get local memory key
     *
     * @return local key for RDMA operations
     */
    public int getLocalKey() {
        return localKey;
    }

    /**
     * Get remote memory key
     *
     * @return remote key for RDMA operations
     */
    public int getRemoteKey() {
        return remoteKey;
    }

    }
    
    public ByteBuffer getBuffer() {
        if (!valid) throw new IllegalStateException("Memory region invalidated");
        return buffer;
    }
    
    public int getLocalKey() { return localKey; }
    public int getRemoteKey() { return remoteKey; }
    public long getAddress() { return address; }
    public int getSize() { return buffer.remaining(); }