xring

case class Person1(name: String, age: Int, other: Option[String])
case class Person2(name: String, age: Int, other: String)

import play.api.libs.functional.syntax._
import play.api.libs.json._

implicit val person1Format = (
  (JsPath \ "name").format[String] and
    (JsPath \ "age").format[Int] and
    (JsPath \ "other").formatNullable[String].inmap[Option[String]](x => Some(x.getOrElse("default")), y => y)

xring

When using lambda in a Maven based project in IntelliJ IDEA, got

idea lambda expressions are not supported in -source 1.5

solved by add this in pom file:

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
 maven-compiler-plugin

xring

MicroService Proxy Gateway Solutions

Kong, Traefik, Caddy, Linkerd, Fabio, Vulcand, and Netflix Zuul seem to be the most common in microservice proxy/gateway solutions. Kubernetes Ingress is often a simple Ngnix, which is difficult to separate the popularity from other things.

Github Star Trend:

This is just a picture of this link from March 2, 2019

Originally, I had included some other solution

xring

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
  name: api
  namespace: x
spec:
  selector:
    istio: ingressgateway
  servers:
  - hosts:
    - api.xring.info

xring

@RestController
@Slf4j
public class AuthController {

    @GetMapping("/")
    public void auth(HttpServletRequest request, HttpServletResponse response) {

        Map<String, String> headers = new HashMap<>();
        Enumeration headerNames = request.getHeaderNames();
        while (headerNames.hasMoreElements()) {

xring

apiVersion: networking.istio.io/v1alpha3
kind: EnvoyFilter
metadata:
  name: inf-auth-gateway-rest
spec:
  workloadLabels:
    app: istio-ingressgateway
  filters:
  - listenerMatch:
      portNumber: 443

xring

apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: inf-auth-gateway-rest
  labels:
    app: inf-auth-gateway-rest
spec:
  replicas: 1
  selector:
    matchLabels:

xring

<dependencies>
    <dependency>
        <groupId>io.envoyproxy.controlplane</groupId>
        <artifactId>api</artifactId>
        <version>0.1.15</version>
    </dependency>
    <dependency>
        <groupId>io.grpc</groupId>
        <artifactId>grpc-netty-shaded</artifactId>
        <version>1.20.0</version>

xring

import com.google.rpc.Status;
import io.envoyproxy.envoy.service.auth.v2.AuthorizationGrpc;
import io.envoyproxy.envoy.service.auth.v2.CheckRequest;
import io.envoyproxy.envoy.service.auth.v2.CheckResponse;
import io.envoyproxy.envoy.service.auth.v2.DeniedHttpResponse;
import io.envoyproxy.envoy.type.HttpStatus;
import io.envoyproxy.envoy.type.StatusCode;
import io.grpc.Server;
import io.grpc.ServerBuilder;
import io.grpc.stub.StreamObserver;

xring

apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: inf-auth-gateway-grpc
  labels:
    app: inf-auth-gateway-gprc
spec:
  replicas: 1
  selector:
    matchLabels: