codesnips

observer-pattern

typescript 
export type EventMap = Record<string, unknown[]>;

type Listener<Args extends unknown[]> = (...args: Args) => void;

export class TypedEmitter<Events extends EventMap> {
  private listeners = new Map<keyof Events, Set<Listener<any>>>();

Type-Safe Event Emitter With Strongly-Typed Listener Payloads in TypeScript

typescript events event-emitter
by codesnips 3 tabs
java 
package com.shop.orders.events;

import java.math.BigDecimal;
import java.time.Instant;

public final class OrderPlaced {

Publishing and Consuming an OrderPlaced Domain Event with Spring's ApplicationEventPublisher

java spring-boot spring
by codesnips 4 tabs
python 
from dataclasses import dataclass, field
from datetime import datetime, timezone
from decimal import Decimal


def _now():

Synchronous Domain Event Bus with a Registry-Based Publisher in Python

domain-events event-bus pubsub
by codesnips 3 tabs