txlcn-txmsg-netty/src/main/java/com/codingapi/txlcn/txmsg/netty/bean/RpcCmdContext.java
public synchronized RpcContent addKey(String key) {
        RpcContent rpcContent = createRpcContent();
        map.put(key, rpcContent);
        return rpcContent;
    }
public synchronized RpcContent addKey(String key) {
        RpcContent rpcContent = createRpcContent();
        map.put(key, rpcContent);
        return rpcContent;
    }
并发可能会出重复添加

@param key key
@return RpcContent