akoua / grpc-demo

gRPC with Spring Boot

gRPC demo with Spring Boot

gRPC with Spring Boot

Client Testing

Now I use evans for gRPC client test, please refer https://github.com/ktr0731/evans for test. the demo is in 'src/main/proto'

Load Balance

    ManagedChannel channel = ManagedChannelBuilder
            .forTarget("eureka://grpc-service-1")
            .nameResolverFactory(new EurekaNameResolverProvider(eurekaClientConfig))
            .loadBalancerFactory(RoundRobinLoadBalancerFactory.getInstance())
            .usePlaintext(true)
            .build();

• target: the compliant URI for NameResolver. URL can contains gRPC service name

class XdsNameResolverProvider extends NameResolverProvider {
     
     public XdsNameResolver newNameResolver(URI targetUri, Args args) { 
     
     }
 }

Health check

Please refer grpc-services-1.13.1.jar!/grpc/health/v1/health.proto and io.grpc.health.v1.HealthGrpc, and almost you should implement HealthGrpc.HealthImplBase for health checking, please check HealthServiceImpl.java

$ cd src/main/health-check
$ evans

TLS

Please consider to use mkcert for testing

 grpc:
    security:
      cert-chain: classpath:cert/server-cert.pem
      private-key: file:../grpc-spring-boot-starter-demo/src/test/resources/cert/server-key.pem

Reactive gPRC

Reactive programming with grpc-java: https://github.com/salesforce/reactive-grpc

References

• gRPC Wire format(gRPC over HTTP2): https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md
• proto3: https://developers.google.com/protocol-buffers/docs/proto3
• gRPC: http://www.grpc.io/
• gPRC Java: http://www.grpc.io/docs/quickstart/java.html
• gRPC Java Issues: https://github.com/grpc/grpc-java/issues
• Protobuf Maven Plugin: https://www.xolstice.org/protobuf-maven-plugin/
• Protoc plugin for bringing together Kotlin, Protobuf, Coroutines, and gRPC: https://github.com/marcoferrer/kroto-plus
• gRPC Load Balancing: https://grpc.io/blog/loadbalancing/ https://github.com/makdharma/grpc-zookeeper-lb/blob/master/examples/src/main/java/io/grpc/examples/helloworld/HelloWorldClient.java

Java without IDL

• https://github.com/supercharger/grpc-proxy
• https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md
• gRPC semantics: https://github.com/grpc/grpc/blob/ea6facf634569727b0e44099d66e9fba1046019d/doc/PROTOCOL-SEMANTICS.md
• gRPC: Up and Running: https://learning.oreilly.com/library/view/grpc-up-and/9781492058328/