@daiso-tech/core
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The library offers flexible, framework-agnostic solutions for modern web applications, built on adaptable components that integrate seamlessly with popular frameworks like Next Js.
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JavaScript
/**
* @module EventBus
*/
import {} from "../../../../event-bus/contracts/_module-exports.js";
import { EventBus, } from "../../../../event-bus/implementations/derivables/event-bus/_module.js";
import { DefaultAdapterNotDefinedError, UnregisteredAdapterError, } from "../../../../utilities/_module-exports.js";
/**
* The `EventBusFactory` class is immutable.
*
* IMPORT_PATH: `"@daiso-tech/core/event-bus"`
* @group Derivables
*/
export class EventBusFactory {
settings;
/**
* @example
* ```ts
* import { type IEventBusAdapter, BaseEvent } from "@daiso-tech/core/event-bus/contracts";
* import { EventBusFactory } from "@daiso-tech/core/event-bus";
* import { MemoryEventBusAdapter, RedisPubSubEventBusAdapter } from "@daiso-tech/core/event-bus/adapters";
* import { KeyPrefixer, type FactoryFn } from "@daiso-tech/core/utilities";
* import { Serde } from "@daiso-tech/core/serde";
* import { SuperJsonSerdeAdapter } from "@daiso-tech/core/serde/adapters"
* import Redis from "ioredis";
*
* type Store = Partial<Record<string, IEventBusAdapter>>;
*
* function cahceAdapterFactory(store: Store): FactoryFn<string, IEventBusAdapter> {
* return (prefix) => {
* let adapter = store[prefix];
* if (adapter === undefined) {
* adapter = new MemoryEventBusAdapter();
* store[prefix] = adapter;
* }
* return adapter;
* }
* }
*
* const serde = new Serde(new SuperJsonSerdeAdapter());
* const store: Store = {};
* const eventBusFactory = new EventBusFactory({
* keyPrefixer: new KeyPrefixer("event-bus"),
* adapters: {
* memory: new MemoryEventBusAdapter(),
* memoryFactory: cahceAdapterFactory(store),
* redis: new RedisPubSubEventBusAdapter({
* serde,
* dispatcherClient: new Redis("YOUR_REDIS_CONNECTION_STRING"),
* listenerClient: new Redis("YOUR_REDIS_CONNECTION_STRING"),
* }),
* },
* defaultAdapter: "memory"
* });
* ```
*/
constructor(settings) {
this.settings = settings;
}
setKeyPrefixer(keyPrefixer) {
return new EventBusFactory({
...this.settings,
keyPrefixer,
});
}
setLazyPromiseFactory(factory) {
return new EventBusFactory({
...this.settings,
lazyPromiseFactory: factory,
});
}
/**
* @example
* ```ts
* import { type IEventBusAdapter, BaseEvent } from "@daiso-tech/core/event-bus/contracts";
* import { EventBusFactory } from "@daiso-tech/core/event-bus";
* import { MemoryEventBusAdapter, RedisPubSubEventBusAdapter } from "@daiso-tech/core/event-bus/adapters";
* import { KeyPrefixer, type FactoryFn } from "@daiso-tech/core/utilities";
* import { Serde } from "@daiso-tech/core/serde";
* import { SuperJsonSerdeAdapter } from "@daiso-tech/core/serde/adapters"
* import Redis from "ioredis";
*
* type Store = Partial<Record<string, IEventBusAdapter>>;
*
* function cahceAdapterFactory(store: Store): FactoryFn<string, IEventBusAdapter> {
* return (prefix) => {
* let adapter = store[prefix];
* if (adapter === undefined) {
* adapter = new MemoryEventBusAdapter();
* store[prefix] = adapter;
* }
* return adapter;
* }
* }
*
* const dispatcherClient = new Redis("YOUR_REDIS_CONNECTION_STRING");
* const listenerClient = new Redis("YOUR_REDIS_CONNECTION_STRING");
* const serde = new Serde(new SuperJsonSerdeAdapter());
* const store: Store = {};
* const eventBusFactory = new EventBusFactory({
* keyPrefixer: new KeyPrefixer("event-bus"),
* adapters: {
* memory: new MemoryEventBusAdapter(),
* memoryFactory: cahceAdapterFactory(store),
* redis: new RedisPubSubEventBusAdapter({
* serde,
* dispatcherClient: new Redis("YOUR_REDIS_CONNECTION_STRING"),
* listenerClient: new Redis("YOUR_REDIS_CONNECTION_STRING"),
* }),
* },
* defaultAdapter: "memory"
* });
*
* type AddEvent = {
* a: number;
* b: number;
* };
* type EventMap = {
* add: AddEvent;
* };
*
* // Will dispatch AddEvent using the default adapter which is MemoryEventBusAdapter
* await eventBusFactory
* .use<EventMap>()
* .dispatch("add", { a: 1, b: 2 });
*
* // Will dispatch AddEvent using the redis adapter which is RedisPubSubEventBusAdapter
* await eventBusFactory
* .use<EventMap>("redis")
* .dispatch("add", { a: 1, b: 2 });
* ```
*/
use(adapterName = this.settings.defaultAdapter) {
if (adapterName === undefined) {
throw new DefaultAdapterNotDefinedError(EventBusFactory.name);
}
const adapter = this.settings.adapters[adapterName];
if (adapter === undefined) {
throw new UnregisteredAdapterError(adapterName);
}
return new EventBus({
adapter,
...this.settings,
});
}
}
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