grpc-java-course

Learn gRPC by follow here

gRPC feature

• Compare to Rest/JSON base API

  • Cros
    • Use binary data format -> easy serialize and deserialize by machine
    • Smaller -> faster
    • ...
  • Cons
    • Few tools support for testing

• Backward of HTTP/1

  • Create new connection for new request
  • Modal request/response -> server can response only they received a request from client before
  • Data isn't compressed

• gRPC using HTTP/2 as transport layer

  • Mutiflexing : mutiple message in a connection
  • Server push : Server can response stream of message with a request from client before
  • Bidirectional : Server and client can asynchronous communicate each other
  • Header compression: header can be compressed so that that's size is smaller -> faster
  • Secure : Base on SSL/TSL protocol, gRPC is secure by default

gRPC basic

• Unary
• Server Streaming
• Client Streaming
• Bidirectional streaming

gRPC advanced

• Handling Errors, for more infomation read here https://grpc.io/docs/guides/error/

• Deadline call, https://grpc.io/blog/deadlines/

• SSL Security

  • Note : on production : use SSL instead .usePlaintext() to ensure security
  • on developement: use .usePlaintext() for simple and fast

• gRPC Language Interoperability : you can create client and server with isn't same languague

• gRPC Reflection and Evans CLI : useful tools support gRPC client command line is evans

  • Follow https://github.com/grpc/grpc-java/blob/master/documentation/server-reflection-tutorial.md
  • Install evans for gRPC client https://github.com/ktr0731/evans
  • On linux download file evans-package.tar.gz

  
  $ tar xvzf evans-package.tar.gz // untar
  $ sudo mv evans /usr/local/bin  // for access everywhere from terminal
  $ evans --cli -r -p 50052       // open grpc-cli