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SemaphoreProviderFactory

The SemaphoreProviderFactory class provides a flexible way to configure and switch between different semaphore adapters at runtime.

Initial configuration​

To begin using the ISemaphoreProviderFactory, You will need to register all required adapters during initialization.

import { SemaphoreProviderFactory } from "@daiso-tech/core/semaphore";
import { MemorySemaphoreAdapter } from "@daiso-tech/core/semaphore/memory-semaphore-adapter";
import { RedisSemaphoreAdapter } from "@daiso-tech/core/semaphore/redis-semaphore-adapter";
import { Serde } from "@daiso-tech/core/serde";
import type { ISerde } from "@daiso-tech/core/serde/contracts";
import { SuperJsonSerdeAdapter } from "@daiso-tech/core/serde/super-json-serde-adapter";
import Redis from "ioredis";

const serde = new Serde(new SuperJsonSerdeAdapter());
const semaphoreProvider = new SemaphoreProviderFactory({
    serde,
    adapters: {
        memory: new MemorySemaphoreAdapter(),
        redis: new RedisSemaphoreAdapter(new Redis("YOUR_REDIS_CONNECTION")),
    },
    // You can set an optional default adapter
    defaultAdapter: "memory",
});

Usage examples​

1. Using the default adapter​

await semaphoreProvider
    .use()
    .create("shared-resource")
    .run(async () => {
        // code to run
    });
danger

Note that if you dont set a default adapter, an error will be thrown.

2. Specifying an adapter explicitly​

await semaphoreProvider
    .use("redis")
    .create("shared-resource")
    .run(async () => {
        // code to run
    });
danger

Note that if you specify a non-existent adapter, an error will be thrown.

3. Overriding default settings​

await semaphoreProvider
    .setNamespace(new Namespace("@my-namespace"))
    .use("redis")
    .create("shared-resource")
    .run(async () => {
        // code to run
    });
info

Note that the SemaphoreProviderFactory is immutable, meaning any configuration override returns a new instance rather than modifying the existing one.

Further information​

For further information refer to @daiso-tech/core/semaphore API docs.