Can you share your code? Did you deploy the Workflow? Workflows don’t need to be created separatel

P

pao ramen•11/20/24, 11:42 AM

Sometimes I get this error: "A call to blockConcurrencyWhile() in a Durable Object waited for too long. The call was canceled and the Durable Object was reset."

P

pao ramen•11/20/24, 11:43 AM

and also "Error: Durable Object exceeded its CPU time limit and was reset."

MMatt Silverlock Can you share your code? Did you deploy the Workflow? Workflows don’t need to ...

T

telliks•11/20/24, 12:06 PM

Sure, I can share some pieces that I reckon is relevant. Appreciate your help. I did deploy the worker, yes.

wrangler.toml

wrangler.toml

[[workflows]]
name = "process-incoming-emails"
binding = "PROCESS_INCOMING_EMAILS_WORKFLOW"
class_name = "ProcessIncomingEmailsWorkflow"

[[workflows]]
name = "process-incoming-emails"
binding = "PROCESS_INCOMING_EMAILS_WORKFLOW"
class_name = "ProcessIncomingEmailsWorkflow"

[[workflows]]
name = "process-incoming-emails"
binding = "PROCESS_INCOMING_EMAILS_WORKFLOW"
class_name = "ProcessIncomingEmailsWorkflow"

[[workflows]]
name = "process-incoming-emails"
binding = "PROCESS_INCOMING_EMAILS_WORKFLOW"
class_name = "ProcessIncomingEmailsWorkflow"

types.ts

types.ts

import type { Workflow } from '@cloudflare/workers-types';

export type Bindings = {
  // ...other bindings
  PROCESS_INCOMING_EMAILS_WORKFLOW: Workflow;
};

import type { Workflow } from '@cloudflare/workers-types';

export type Bindings = {
  // ...other bindings
  PROCESS_INCOMING_EMAILS_WORKFLOW: Workflow;
};

import type { Workflow } from '@cloudflare/workers-types';

export type Bindings = {
  // ...other bindings
  PROCESS_INCOMING_EMAILS_WORKFLOW: Workflow;
};

import type { Workflow } from '@cloudflare/workers-types';

export type Bindings = {
  // ...other bindings
  PROCESS_INCOMING_EMAILS_WORKFLOW: Workflow;
};

src/index.ts

src/index.ts

import { app } from './app'; // Hono app
import type { Bindings } from './types';
import { handleForwardingIncomingEmails } from './incoming-emails/forward-email-handler';

export { ProcessIncomingEmailsWorkflow } from './incoming-emails/workflow';

const handler = {
  fetch: app.fetch,
  async email(message, env, ctx) {
    await handleForwardingIncomingEmails(message, env, ctx);
  },
} satisfies ExportedHandler<Bindings>;

import { app } from './app'; // Hono app
import type { Bindings } from './types';
import { handleForwardingIncomingEmails } from './incoming-emails/forward-email-handler';

export { ProcessIncomingEmailsWorkflow } from './incoming-emails/workflow';

const handler = {
  fetch: app.fetch,
  async email(message, env, ctx) {
    await handleForwardingIncomingEmails(message, env, ctx);
  },
} satisfies ExportedHandler<Bindings>;

import { app } from './app'; // Hono app
import type { Bindings } from './types';
import { handleForwardingIncomingEmails } from './incoming-emails/forward-email-handler';

export { ProcessIncomingEmailsWorkflow } from './incoming-emails/workflow';

const handler = {
  fetch: app.fetch,
  async email(message, env, ctx) {
    await handleForwardingIncomingEmails(message, env, ctx);
  },
} satisfies ExportedHandler<Bindings>;

import { app } from './app'; // Hono app
import type { Bindings } from './types';
import { handleForwardingIncomingEmails } from './incoming-emails/forward-email-handler';

export { ProcessIncomingEmailsWorkflow } from './incoming-emails/workflow';

const handler = {
  fetch: app.fetch,
  async email(message, env, ctx) {
    await handleForwardingIncomingEmails(message, env, ctx);
  },
} satisfies ExportedHandler<Bindings>;

./incoming-emails/forward-email-handler

./incoming-emails/forward-email-handler

export const handleForwardingIncomingEmails = async (
  message: ForwardableEmailMessage,
  env: Bindings,
  _ctx: ExecutionContext,
) => {
  return withLogTags(
    {
      tags: {
        handler: 'email',
        requestId: crypto.randomUUID(),
      },
    },
    async () => {
      const [address] = addressParser(message.to);

      if (!address?.address) {
        logger.warn('No email address found in `to` field');
        return message.setReject('No email address found in `to` field');
      }

      logger.log('Workflow defined', {
        defined: !!env.PROCESS_INCOMING_EMAILS_WORKFLOW, // <-- Not defined here!
      });

      // await env.PROCESS_INCOMING_EMAILS_WORKFLOW.create({
      //   params: {
      //     message,
      //   },
      // });
    }
  )
}

export const handleForwardingIncomingEmails = async (
  message: ForwardableEmailMessage,
  env: Bindings,
  _ctx: ExecutionContext,
) => {
  return withLogTags(
    {
      tags: {
        handler: 'email',
        requestId: crypto.randomUUID(),
      },
    },
    async () => {
      const [address] = addressParser(message.to);

      if (!address?.address) {
        logger.warn('No email address found in `to` field');
        return message.setReject('No email address found in `to` field');
      }

      logger.log('Workflow defined', {
        defined: !!env.PROCESS_INCOMING_EMAILS_WORKFLOW, // <-- Not defined here!
      });

      // await env.PROCESS_INCOMING_EMAILS_WORKFLOW.create({
      //   params: {
      //     message,
      //   },
      // });
    }
  )
}

export const handleForwardingIncomingEmails = async (
  message: ForwardableEmailMessage,
  env: Bindings,
  _ctx: ExecutionContext,
) => {
  return withLogTags(
    {
      tags: {
        handler: 'email',
        requestId: crypto.randomUUID(),
      },
    },
    async () => {
      const [address] = addressParser(message.to);

      if (!address?.address) {
        logger.warn('No email address found in `to` field');
        return message.setReject('No email address found in `to` field');
      }

      logger.log('Workflow defined', {
        defined: !!env.PROCESS_INCOMING_EMAILS_WORKFLOW, // <-- Not defined here!
      });

      // await env.PROCESS_INCOMING_EMAILS_WORKFLOW.create({
      //   params: {
      //     message,
      //   },
      // });
    }
  )
}

export const handleForwardingIncomingEmails = async (
  message: ForwardableEmailMessage,
  env: Bindings,
  _ctx: ExecutionContext,
) => {
  return withLogTags(
    {
      tags: {
        handler: 'email',
        requestId: crypto.randomUUID(),
      },
    },
    async () => {
      const [address] = addressParser(message.to);

      if (!address?.address) {
        logger.warn('No email address found in `to` field');
        return message.setReject('No email address found in `to` field');
      }

      logger.log('Workflow defined', {
        defined: !!env.PROCESS_INCOMING_EMAILS_WORKFLOW, // <-- Not defined here!
      });

      // await env.PROCESS_INCOMING_EMAILS_WORKFLOW.create({
      //   params: {
      //     message,
      //   },
      // });
    }
  )
}

./incoming-emails/workflow

./incoming-emails/workflow

export class ProcessIncomingEmailsWorkflow extends WorkflowEntrypoint<
  Bindings,
  Params
> {}

export class ProcessIncomingEmailsWorkflow extends WorkflowEntrypoint<
  Bindings,
  Params
> {}

export class ProcessIncomingEmailsWorkflow extends WorkflowEntrypoint<
  Bindings,
  Params
> {}

export class ProcessIncomingEmailsWorkflow extends WorkflowEntrypoint<
  Bindings,
  Params
> {}

Ttelliks Sure, I can share some pieces that I reckon is relevant. Appreciate your help. I...

M

Matt SilverlockOP•11/20/24, 12:52 PM

And what does

npx wrangler workflows list

npx wrangler workflows list

show? Do your Workflow names match?

Do you pass your

Bindings

Bindings

type when you’re instantiating your Hono app instances?

I don’t see your app definition.

T

telliks•11/20/24, 2:12 PM

It comes back with

There are no deployed Workflows in this account

There are no deployed Workflows in this account

. This is why I thought that you need something more than just the config in

wrangler.toml

wrangler.toml

for the deployment to work.

As far as I can tell my workflow names match:

[[workflows]].binding

[[workflows]].binding

matches what I use for

env.PROCESS_INCOMING_EMAILS_WORKFLOW

env.PROCESS_INCOMING_EMAILS_WORKFLOW

as well as what I set on the

Bindings

Bindings

type. And

[[workflows]].class_name

[[workflows]].class_name

matches the name of my workflows class export,

ProcessIncomingEmailsWorkflow

ProcessIncomingEmailsWorkflow

.

Can

[[workflows]].name

[[workflows]].name

be any arbitrary name or what should that match?

I'm not sure how the types would affect the runtime bindings and this worker app has many other bindings (KV, queues, AI, etc) which all work.

Here is the relevant code that instantiates the Hono app (it uses the factory setup):

app.ts

app.ts

import { createFactory } from 'hono/factory';

import { Env } from './types';

export const factory = createFactory<Env>({
  initApp: (app) => {
    app.use(async (c, next) => {
      // Make supabase client available to all requests
      const supabase = createClient(c.env.SUPABASE_URL, c.env.SUPABASE_KEY);
      c.set('supabase', supabase);

      await next();
    });
  },
});

export const app = factory.createApp();

import { createFactory } from 'hono/factory';

import { Env } from './types';

export const factory = createFactory<Env>({
  initApp: (app) => {
    app.use(async (c, next) => {
      // Make supabase client available to all requests
      const supabase = createClient(c.env.SUPABASE_URL, c.env.SUPABASE_KEY);
      c.set('supabase', supabase);

      await next();
    });
  },
});

export const app = factory.createApp();

import { createFactory } from 'hono/factory';

import { Env } from './types';

export const factory = createFactory<Env>({
  initApp: (app) => {
    app.use(async (c, next) => {
      // Make supabase client available to all requests
      const supabase = createClient(c.env.SUPABASE_URL, c.env.SUPABASE_KEY);
      c.set('supabase', supabase);

      await next();
    });
  },
});

export const app = factory.createApp();

import { createFactory } from 'hono/factory';

import { Env } from './types';

export const factory = createFactory<Env>({
  initApp: (app) => {
    app.use(async (c, next) => {
      // Make supabase client available to all requests
      const supabase = createClient(c.env.SUPABASE_URL, c.env.SUPABASE_KEY);
      c.set('supabase', supabase);

      await next();
    });
  },
});

export const app = factory.createApp();

types.ts

types.ts

import type { Workflow } from '@cloudflare/workers-types';

export type Bindings = {
  // ...other bindings
  PROCESS_INCOMING_EMAILS_WORKFLOW: Workflow;
};

export type Env = {
  Bindings: Bindings;
  Variables: Variables;
};

import type { Workflow } from '@cloudflare/workers-types';

export type Bindings = {
  // ...other bindings
  PROCESS_INCOMING_EMAILS_WORKFLOW: Workflow;
};

export type Env = {
  Bindings: Bindings;
  Variables: Variables;
};

import type { Workflow } from '@cloudflare/workers-types';

export type Bindings = {
  // ...other bindings
  PROCESS_INCOMING_EMAILS_WORKFLOW: Workflow;
};

export type Env = {
  Bindings: Bindings;
  Variables: Variables;
};

import type { Workflow } from '@cloudflare/workers-types';

export type Bindings = {
  // ...other bindings
  PROCESS_INCOMING_EMAILS_WORKFLOW: Workflow;
};

export type Env = {
  Bindings: Bindings;
  Variables: Variables;
};

Do you think the factory setup could be problematic?

Ttelliks It comes back with `There are no deployed Workflows in this account`. This is wh...

M

Matt SilverlockOP•11/20/24, 5:19 PM

If the Workflows API (incl. wrangler) doesn't report any deployed Workflows, then you need to fix that first. Deploying (registering) the Workflow is needed to bind to it.

Nothing else matters until you have a registered Workflow.

Ttelliks It comes back with `There are no deployed Workflows in this account`. This is wh...

M

Matt SilverlockOP•11/20/24, 5:20 PM

Can [[workflows]].name be any arbitrary name or what should that match?

It needs to match the name of the Workflow! Per the guide:

MMatt Silverlock > Can [[workflows]].name be any arbitrary name or what should that match? It ne...

T

telliks•11/20/24, 5:49 PM

What does this mean? Is the workflow supposed to have the same name as the worker? What happens then if you want multiple workflows per worker?

Ttelliks What does this mean? Is the workflow supposed to have the same name as the worke...

M

Matt SilverlockOP•11/20/24, 6:20 PM

The class name distinguishes Workflows within a script - e.g.

Ttelliks What does this mean? Is the workflow supposed to have the same name as the worke...

M

Matt SilverlockOP•11/20/24, 6:22 PM

Again, if

workflows list

workflows list

shows nothing, you haven't registered your Workflow yet by deploying it.

MMatt Silverlock Again, if `workflows list` shows nothing, you haven't registered your Workflow y...

T

telliks•11/20/24, 6:30 PM

I understand that my workflow is not deployed, I just don’t understand what I am supposed to do extra apart from the config I showed and then deploying the whole worker with “wrangler deploy”. From my understanding, having the config is enough and then wrangler should pick up that it should create the configured workflow. This is what my whole question is about. It is not deploying my configured workflow when I deploy the worker, even though the deployment runs successfully.

Original message was deleted

T

telliks•11/20/24, 7:05 PM

Sure, here is the whole file with some redactions.

#:schema node_modules/wrangler/config-schema.json
name = "my-app"
compatibility_date = "2024-10-22"
compatibility_flags = ["nodejs_compat"]
main = "dist/index.js"
minify = true

upload_source_maps = true

tail_consumers = [{ service = "my-app-tail" }]

[build]
command = "pnpm run build"

[observability]
enabled = true

[ai]
binding = "AI"

[[kv_namespaces]]
binding = "INCOMING_EMAILS_KV"
id = "<redacted>"

[[kv_namespaces]]
binding = "DLQ_KV"
id = "<redacted>"

[triggers]
crons = ["* * * * *", "*/30 * * * *"]

[[queues.consumers]]
queue = "account-emails"
dead_letter_queue = "dlq"
max_batch_size = 20       
max_batch_timeout = 10    
max_retries = 10              

[[queues.consumers]]
queue = "incoming-emails"
dead_letter_queue = "dlq"
max_batch_size = 10       
max_batch_timeout = 10    
max_retries = 10          

[[queues.consumers]]
queue = "dlq"

[[queues.producers]]
binding = "ACCOUNT_EMAILS_QUEUE"
queue = "account-emails"

[[queues.producers]]
binding = "INCOMING_EMAILS_QUEUE"
queue = "incoming-emails"

[[workflows]]
name = "process-incoming-emails"
binding = "PROCESS_INCOMING_EMAILS_WORKFLOW"
class_name = "ProcessIncomingEmailsWorkflow"

#:schema node_modules/wrangler/config-schema.json
name = "my-app"
compatibility_date = "2024-10-22"
compatibility_flags = ["nodejs_compat"]
main = "dist/index.js"
minify = true

upload_source_maps = true

tail_consumers = [{ service = "my-app-tail" }]

[build]
command = "pnpm run build"

[observability]
enabled = true

[ai]
binding = "AI"

[[kv_namespaces]]
binding = "INCOMING_EMAILS_KV"
id = "<redacted>"

[[kv_namespaces]]
binding = "DLQ_KV"
id = "<redacted>"

[triggers]
crons = ["* * * * *", "*/30 * * * *"]

[[queues.consumers]]
queue = "account-emails"
dead_letter_queue = "dlq"
max_batch_size = 20       
max_batch_timeout = 10    
max_retries = 10              

[[queues.consumers]]
queue = "incoming-emails"
dead_letter_queue = "dlq"
max_batch_size = 10       
max_batch_timeout = 10    
max_retries = 10          

[[queues.consumers]]
queue = "dlq"

[[queues.producers]]
binding = "ACCOUNT_EMAILS_QUEUE"
queue = "account-emails"

[[queues.producers]]
binding = "INCOMING_EMAILS_QUEUE"
queue = "incoming-emails"

[[workflows]]
name = "process-incoming-emails"
binding = "PROCESS_INCOMING_EMAILS_WORKFLOW"
class_name = "ProcessIncomingEmailsWorkflow"

#:schema node_modules/wrangler/config-schema.json
name = "my-app"
compatibility_date = "2024-10-22"
compatibility_flags = ["nodejs_compat"]
main = "dist/index.js"
minify = true

upload_source_maps = true

tail_consumers = [{ service = "my-app-tail" }]

[build]
command = "pnpm run build"

[observability]
enabled = true

[ai]
binding = "AI"

[[kv_namespaces]]
binding = "INCOMING_EMAILS_KV"
id = "<redacted>"

[[kv_namespaces]]
binding = "DLQ_KV"
id = "<redacted>"

[triggers]
crons = ["* * * * *", "*/30 * * * *"]

[[queues.consumers]]
queue = "account-emails"
dead_letter_queue = "dlq"
max_batch_size = 20       
max_batch_timeout = 10    
max_retries = 10              

[[queues.consumers]]
queue = "incoming-emails"
dead_letter_queue = "dlq"
max_batch_size = 10       
max_batch_timeout = 10    
max_retries = 10          

[[queues.consumers]]
queue = "dlq"

[[queues.producers]]
binding = "ACCOUNT_EMAILS_QUEUE"
queue = "account-emails"

[[queues.producers]]
binding = "INCOMING_EMAILS_QUEUE"
queue = "incoming-emails"

[[workflows]]
name = "process-incoming-emails"
binding = "PROCESS_INCOMING_EMAILS_WORKFLOW"
class_name = "ProcessIncomingEmailsWorkflow"

#:schema node_modules/wrangler/config-schema.json
name = "my-app"
compatibility_date = "2024-10-22"
compatibility_flags = ["nodejs_compat"]
main = "dist/index.js"
minify = true

upload_source_maps = true

tail_consumers = [{ service = "my-app-tail" }]

[build]
command = "pnpm run build"

[observability]
enabled = true

[ai]
binding = "AI"

[[kv_namespaces]]
binding = "INCOMING_EMAILS_KV"
id = "<redacted>"

[[kv_namespaces]]
binding = "DLQ_KV"
id = "<redacted>"

[triggers]
crons = ["* * * * *", "*/30 * * * *"]

[[queues.consumers]]
queue = "account-emails"
dead_letter_queue = "dlq"
max_batch_size = 20       
max_batch_timeout = 10    
max_retries = 10              

[[queues.consumers]]
queue = "incoming-emails"
dead_letter_queue = "dlq"
max_batch_size = 10       
max_batch_timeout = 10    
max_retries = 10          

[[queues.consumers]]
queue = "dlq"

[[queues.producers]]
binding = "ACCOUNT_EMAILS_QUEUE"
queue = "account-emails"

[[queues.producers]]
binding = "INCOMING_EMAILS_QUEUE"
queue = "incoming-emails"

[[workflows]]
name = "process-incoming-emails"
binding = "PROCESS_INCOMING_EMAILS_WORKFLOW"
class_name = "ProcessIncomingEmailsWorkflow"

T

telliks•11/20/24, 7:27 PM

@Skye If it helps, I could successfully create a brand new workflow with the

npm create cloudflare@latest workflows-starter -- --template "cloudflare/workflows-starter"

npm create cloudflare@latest workflows-starter -- --template "cloudflare/workflows-starter"

command (apart from the empty object issue when

env.MY_WORKFLOW.create()

env.MY_WORKFLOW.create()

is called locally). Does this command do more than simply scaffolding the worker project on my local file system?

For my existing worker, I just added the workflow config to the toml file. Should I create a workflow with a wrangler CLI command first? Based on all the discussions, I'm under the impression that the wrangler.toml config should be enough and that during deployment wrangler will create a workflow if it doesn't exist yet. Please confirm if this is correct. I know this is not how other cloudflare products like KV or Queues work. You have to create them first and then reference them in the toml file.

T

telliks•11/20/24, 7:44 PM

Okay, finally got to the bottom of this. My local wrangler version was on the latest version but the one running in CI was on v3.80.0, so it never deployed the workflow

Thanks Skye, Matt, Diogo Ferreira and sdr for trying to help me

P

pao ramen•11/20/24, 9:41 PM

ok, in the end I gave up. I faced too many durable execution errors, and queues started to get clogged because

Workflow.create

Workflow.create

was taking a whole minute. I will keep an eye when workflows get more mature.

M

makisuo•11/20/24, 10:48 PM

Is it possible to have multiple workflows in one worker? If I try define multiple workflows wrangler crashes without any error logs.

Mmakisuo Is it possible to have multiple workflows in one worker? If I try define multipl...

A

arch•11/20/24, 11:25 PM

A fix was recently merged and will probably be tagged as a release soon https://github.com/cloudflare/workers-sdk/commit/563439bd02c450921b28d721d36be5a70897690d

GitHub

Fix multiple workflows and add proper engine persistance (#7286) · ...

fix: allow multiple workflow definitions
feat: make engine persist logs and status over multiple runs
chore: add persistance test and remove redundant env types
chore: change chang...

Original message was deleted

P

pao ramen•11/21/24, 8:55 AM

awesome! let me know when those improvements land so I can test them out.

Ttelliks @Skye If it helps, I could successfully create a brand new workflow with the `np...

D

Diogo Ferreira•11/21/24, 11:34 AM

^apart from the empty object issue when env.MY_WORKFLOW.create() is called locally

wrangler@3.88.0 fixes that

A

alex (he/him)•11/21/24, 4:31 PM

I have two things which are a bit annoying, but which I can workaround. However any ETA on fixes?

a) The Dashboard trigger doesn't work. The params object get's stringified strangely, so my logic never works. Triggering from the CLI or a Binding with the same params object works without issues
b) The option to delete workflows in the UI & CLI. I changed the name of the workflow, now I have a stale workflow with the old name in the UI

K

kchro3•11/21/24, 8:50 PM

Hi team, I'm seeing an issue when reading & writing from KV in a Workflow.

I am developing with

wrangler dev --remote --env stage

wrangler dev --remote --env stage

& i have a workflow & a KV in a stage env.

I am testing a workflow where it reads from a KV & then writes back to the same KV.

My assumption was that if I stage my worker => trigger the workflow, it will run the stage workflow => read & write from the preview KV in the stage environment because the worker has access to the preview KV.

However, it looks like the stage workflow is actually reading & writing against the non-preview KV in the stage environment, which is inconsistent with the worker behavior. Is this a bug?

I

irvyn•11/22/24, 4:03 PM

Hey based on the limits for workflows (based on workers) does this mean that if I had to do processing of a 2MB file -> 4MB file.

It wont work within just 1 step but I would be able to pass small amounts through multiple steps as long as it stays below the entire limit of "Maximum state that can be persisted per Workflow instance" ?

https://developers.cloudflare.com/workflows/reference/limits/

Maximum persisted state per step    1MiB (2^20 bytes)    1MiB (2^20 bytes)
Maximum state that can be persisted per Workflow instance    100MB    1GB

Maximum persisted state per step    1MiB (2^20 bytes)    1MiB (2^20 bytes)
Maximum state that can be persisted per Workflow instance    100MB    1GB

Cloudflare Docs

Limits | Cloudflare Workflows docs

Limits that apply to authoring, deploying, and running Workflows are detailed below.

森

森@VerseLink (RW)•11/22/24, 11:49 PM

is there a way to check if an workflow id exists?

森

森@VerseLink (RW)•11/22/24, 11:49 PM

say for example if workflow.get(id) and id doesn't exist what is being returned? the documentation wasn't clear about this

森森@VerseLink (RW)say for example if workflow.get(id) and id doesn't exist what is being returned?...

M

Matt SilverlockOP•11/23/24, 12:05 PM

It will throw an exception.

森

森@VerseLink (RW)•11/23/24, 12:07 PM

any specific detail on what type of exception it would throw? since catch all is fine, but what if the exception was a different reason

森森@VerseLink (RW)any specific detail on what type of exception it would throw? since catch all is...

M

Matt SilverlockOP•11/23/24, 12:14 PM

There’s not a specific exception type yet. We should add.

M

Matt SilverlockOP•11/23/24, 12:14 PM

Docs PR: https://github.com/cloudflare/cloudflare-docs/pull/18364

GitHub

workflows: clarify get throws by elithrar · Pull Request #18364 · c...

Clarify that get throws and add an example of catching the error.

森

森@VerseLink (RW)•11/23/24, 12:15 PM

Thank you very much!

森

森@VerseLink (RW)•11/23/24, 12:15 PM

btw i found some minor errors on the document

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森@VerseLink (RW)•11/23/24, 12:15 PM

https://developers.cloudflare.com/workflows/build/workers-api/#status
this should return

Promise<InstanceStatus>

Promise<InstanceStatus>

Cloudflare Docs

Workers API | Cloudflare Workflows docs

This guide details the Workflows API within Cloudflare Workers, including methods, types, and usage examples.

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森@VerseLink (RW)•11/23/24, 12:16 PM

https://developers.cloudflare.com/workflows/build/workers-api/#instancestatus

Cloudflare Docs

Workers API | Cloudflare Workflows docs

This guide details the Workflows API within Cloudflare Workers, including methods, types, and usage examples.

森

森@VerseLink (RW)•11/23/24, 12:16 PM

output should return

object[]

object[]

instead of

object

object

;

森森@VerseLink (RW)https://developers.cloudflare.com/workflows/build/workers-api/#status this shoul...

M

Matt SilverlockOP•11/23/24, 12:17 PM

Open to adding a PR? I’m about to step out as it’s the weekend

MMatt Silverlock Open to adding a PR? I’m about to step out as it’s the weekend

森

森@VerseLink (RW)•11/23/24, 12:17 PM

Will do

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森@VerseLink (RW)•11/23/24, 12:18 PM

finally is there a way to know in the Workflow itself if it is being terminated / restarted, and allow itself to clean up some resources?

If my understanding is correct, termination only happens between each step/sleep, but there doesn't seem to be way to know if the workflow is being terminated.

森森@VerseLink (RW)finally is there a way to know in the Workflow itself if it is being terminated ...

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Matt SilverlockOP•11/23/24, 12:23 PM

No. That also poses a challenge: how long would we allow? What if termination needs to happen faster or is due to machine failure (which would restart your workflow from the last good step elsewhere), or exceeding CPU or memory?

“Finalizers” are challenging as they set an expectation of 100% but not always the case.

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Matt SilverlockOP•11/23/24, 12:24 PM

We might revisit this but not straightforward today.

MMatt Silverlock No. That also poses a challenge: how long would we allow? What if termination ne...

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森@VerseLink (RW)•11/23/24, 12:36 PM

I see, thank you for your reply.

Alternatively, allow a workflow to "stop" (so we have a separate call

workflow.get(id).stop()

workflow.get(id).stop()

) instead of terminate as a means to softly shutdown the workflow. So the user could gracefully close the workflow (for example the workflow could be a long running polling workflow that doesn't have an end state).

User could decide when the stop process should timeout, and call

terminate()

terminate()

to kill the workflow and abruptly kill the workflow in case it's stuck in a inf-loop and we want to kill it for sure.

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森@VerseLink (RW)•11/23/24, 12:38 PM

If I'm not mistaken,

terminate

terminate

is the only way to stop a long running / no end-state workflow, so it would be nice to gracefully or signal the workflow to transition to a potential end-state or cleanup

A

an•11/23/24, 2:23 PM

Hi, currently the cpu time limit on each step is 30s, does that mean the step can live up to 30s?

My step can run up to 10 minutes due to a sleep function in my dependency, but since it's not using cpu I'm not sure I can use step for this

Migrating library to workflow logic is not doable, though.

Aan Hi, currently the cpu time limit on each step is 30s, does that mean the step ca...

S

Seekerdasbatatas•11/23/24, 4:00 PM

the step can live indefinetly (sleep, wait for I/O, etc..) - those 30 seconds regard actual CPU time: think of it as 30 seconds worth of cpu cycles

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Seekerdasbatatas•11/23/24, 4:01 PM

if you are sleeping or waiting for I/O, you are not consuming cpu time

A

an•11/23/24, 4:39 PM

got it, thank you

L

laurynas•11/23/24, 9:58 PM

Any thoughts or plans about adding a websocket/SSE or similar reporting endpoint that we could subscribe to when running a Workflow? To my mind I currently need to either poll the

.status()

.status()

.status()

.status() method (which should be fine for now) or set some outside state from inside the step callback (seems like a code smell).

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森@VerseLink (RW)•11/24/24, 5:15 AM

btw,

Maximum steps per Workflow    256

Maximum steps per Workflow 256

Maximum steps per Workflow    256

Maximum steps per Workflow 256, does this mean only for Workers Free? what about the limitation for Workers Paid

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森@VerseLink (RW)•11/24/24, 5:16 AM

because I just realized this would prohibit the idea of using workflow for a long running no end-state polling process

Can you share your code? Did you deploy the Workflow? Workflows don’t need to be created separatel

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