An exercise in implementing the Timesheet tracker (https://github.com/ultish/jikan-ga-nai-server) using Netflix DGS framework and Kotlin.

Graphiql: http://localhost:8080/graphiql

Learning

See re graphql testing and security https://medium.com/@aleksandar.stojsavljevic/testing-graphql-servers-with-spring-and-dgs-797cccb9f0c7

Kubernetes

• reuse docker daemon from minikube

  eval $(minikube docker-env)

• build docker image
• tag with latest

  docker tag jikan-ga-aru-server:0.0.1-SNAPSHOT jikan-ga-aru-server

• generate kube deployment

  kubectl create deployment jikan-ga-aru-server --image=jikan-ga-aru-server --dry-run -o=yaml > deployment.yaml
  echo --- >> deployment.yaml
  kubectl create service clusterip jikan-ga-aru-server --tcp=8080:8080 --dry-run -o=yaml >> deployment.yaml

  Note: i modified the tag to include :0.0.1-SNAPSHOT but i did not tag latest either Note: i modified the deployment.yaml to set imagePullPolicy: Never
• deploy to kubernetes

  kubectl apply -f deployment.yaml

• port forward

  kubectl port-forward svc/jikan-ga-aru-server 8080:8080

• unset docker daeomon

  eval $(minikube docker-env -u)

DataLoaders and Custom Contexts

A custom context is passed from parent to child(s) which contains a mutable list of Entities that are loaded within a request. These are in-turn used to pull relationship information for Many-to-One DataLoaders, so we can perform a relatively easy query against the DB. Each dataLoader that pulls new data from the DB for the single request will keep adding Entities loaded into this Custom Context for the next child. (This may assume the child queries are not loaded in parallel...)

Not sure if this code will survive a refactor to a federated graphQL service in the future though.

Running in IDEA

Adding truststore/key to VM options:

-Djavax.net.ssl.trustStore=jikan-ga-aru-server/src/main/resources/truststore.jks -Djavax.net.ssl.trustStorePassword=<password>