RPC communication principle and project technology selection

RPC Communication principle

RPC（Remote Procedure Call Protocol）： Remote procedure call protocol .

Technology selection

The serialization and deserialization of messages use protobuf.

protobuf（protocol buffer） yes google A data exchange format of , It is independent of the platform language .
google Provides protobuf Multilingual implementation ：java、c#、c++、go and python, Each implementation contains the compiler and library files of the corresponding language .
Because it's a binary format , Than using xml（20 times ） 、json（10 times ） Data exchange is much faster . It can be used for data communication between distributed applications or data exchange in heterogeneous environment . As an efficient and compatible Binary data transfer format , Can be used for such as network transmission 、 The configuration file 、 Data storage and many other fields .

and Json The difference between ：

1. protobuf It's binary storage ,xml and Json Is text stored .
2. protobuf No need to store additional information , Store only valid data ,Json What's stored is key-value.

Network part , Including looking for rpc Service host , launch rpc Call request and response rpc The results , Use muduo The Internet
Kuhe zookeeper Service configuration center （ Specialized in service discovery ）.