---
title: Use Queues from Durable Objects
description: Publish to a queue from within a Durable Object.
image: https://developers.cloudflare.com/dev-products-preview.png
---

> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/queues/llms.txt  
> Use this file to discover all available pages before exploring further.

[Skip to content](#%5Ftop) 

# Use Queues from Durable Objects

**Last reviewed:**  over 2 years ago 

Publish to a queue from within a Durable Object.

The following example shows you how to write a Worker script to publish to [Cloudflare Queues](https://developers.cloudflare.com/queues/) from within a [Durable Object](https://developers.cloudflare.com/durable-objects/).

Prerequisites:

* A [queue created](https://developers.cloudflare.com/queues/get-started/#3-create-a-queue) via the Cloudflare dashboard or the [wrangler CLI](https://developers.cloudflare.com/workers/wrangler/install-and-update/).
* A [configured **producer** binding](https://developers.cloudflare.com/queues/configuration/configure-queues/#producer-worker-configuration) in the Cloudflare dashboard or Wrangler file.
* A [Durable Object namespace binding](https://developers.cloudflare.com/workers/wrangler/configuration/#durable-objects).

Configure your Wrangler file as follows:

* [  wrangler.jsonc ](#tab-panel-7294)
* [  wrangler.toml ](#tab-panel-7295)

JSONC

```

{

  "$schema": "./node_modules/wrangler/config-schema.json",

  "name": "my-worker",

  "queues": {

    "producers": [

      {

        "queue": "my-queue",

        "binding": "YOUR_QUEUE"

      }

    ]

  },

  "durable_objects": {

    "bindings": [

      {

        "name": "YOUR_DO_CLASS",

        "class_name": "YourDurableObject"

      }

    ]

  },

  "migrations": [

    {

      "tag": "v1",

      "new_sqlite_classes": [

        "YourDurableObject"

      ]

    }

  ]

}


```

TOML

```

"$schema" = "./node_modules/wrangler/config-schema.json"

name = "my-worker"


[[queues.producers]]

queue = "my-queue"

binding = "YOUR_QUEUE"


[[durable_objects.bindings]]

name = "YOUR_DO_CLASS"

class_name = "YourDurableObject"


[[migrations]]

tag = "v1"

new_sqlite_classes = [ "YourDurableObject" ]


```

The following Worker script:

1. Creates a Durable Object stub, or retrieves an existing one based on a userId.
2. Passes request data to the Durable Object.
3. Publishes to a queue from within the Durable Object.

Extending the `DurableObject` base class makes your `Env` available on `this.env` and the Durable Object state available on `this.ctx` within the [fetch() handler](https://developers.cloudflare.com/durable-objects/best-practices/create-durable-object-stubs-and-send-requests/) in the Durable Object.

TypeScript

```

import { DurableObject } from "cloudflare:workers";


interface Env {

  YOUR_QUEUE: Queue;

  YOUR_DO_CLASS: DurableObjectNamespace<YourDurableObject>;

}


export default {

  async fetch(req, env, ctx): Promise<Response> {

    // Assume each Durable Object is mapped to a userId in a query parameter

    // In a production application, this will be a userId defined by your application

    // that you validate (and/or authenticate) first.

    const url = new URL(req.url);

    const userIdParam = url.searchParams.get("userId");


    if (userIdParam) {

      // Get a stub that allows you to call that Durable Object

      const durableObjectStub = env.YOUR_DO_CLASS.getByName(userIdParam);


      // Pass the request to that Durable Object and await the response

      // This invokes the constructor once on your Durable Object class (defined further down)

      // on the first initialization, and the fetch method on each request.

      // We pass the original Request to the Durable Object's fetch method

      const response = await durableObjectStub.fetch(req);


      // This would return "wrote to queue", but you could return any response.

      return response;

    }

    return new Response("userId must be provided", { status: 400 });

  },

} satisfies ExportedHandler<Env>;


export class YourDurableObject extends DurableObject<Env> {

  async fetch(req: Request): Promise<Response> {

    // Error handling elided for brevity.

    // Publish to your queue

    await this.env.YOUR_QUEUE.send({

      id: this.ctx.id.toString(), // Write the ID of the Durable Object to your queue

      // Write any other properties to your queue

    });


    return new Response("wrote to queue");

  }

}


```

```json
{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/directory/","name":"Directory"}},{"@type":"ListItem","position":2,"item":{"@id":"/queues/","name":"Queues"}},{"@type":"ListItem","position":3,"item":{"@id":"/queues/examples/","name":"Examples"}},{"@type":"ListItem","position":4,"item":{"@id":"/queues/examples/use-queues-with-durable-objects/","name":"Use Queues from Durable Objects"}}]}
```