tingstad

Kubernetes

Moved to https://github.com/tingstad/notes/blob/main/kubernetes.md

tingstad

Event driven notes

Dependency inversion

Customer -[Address changed]-> Billing

When this is passed as an event, the Customer system does not need to know about the Billing system. The direction of the dependency has been reversed.

https://www.infoq.com/presentations/event-driven-benefits-pitfalls/

tingstad

import java.util.concurrent.TimeUnit;
import java.util.function.Supplier;

import static java.util.Objects.requireNonNull;

public class CachedSupplier<T> implements Supplier<T> {

    private final Supplier<T> delegate;
    private final long expiration;
    private final Supplier<Long> currentTimeSupplier;

tingstad

console.log(
    JSON.stringify(
        JSON.parse(require('fs').readFileSync(0, 'utf-8')),
        null,
        (args =>
            (argsLength =>
                argsLength > 1
                    ? (arg =>
                        (num => Number.isInteger(num) ? num : arg
                        )(Number(arg))

tingstad

OpenShift Container Platform

+-------------------------------------------------------------+
| Project (= k8s namespace+)                                  |
|                                                             |
|  +-------------------------------------------------+        |
|  | DeploymentConfig (= k8s ReplicationController+) |+       |
|  | - Docker images + ENV & ports                   ||       |
|  +-------------------------------------------------+|       |