chore(workflow-engine): export cancel method (medusajs#11844)

What:
  * Workflow engine exports the method `cancel` to revert a workflow.

Author: carlos-r-l-rodrigues

.changeset/good-wolves-travel.md

@@ -0,0 +1,8 @@
+---
+"@medusajs/workflow-engine-inmemory": patch
+"@medusajs/workflow-engine-redis": patch
+"@medusajs/orchestration": patch
+"@medusajs/types": patch
+---
+
+chore(workflow-engine): expose cancel method

packages/core/orchestration/src/transaction/transaction-orchestrator.ts

@@ -20,6 +20,7 @@ import {
 import {
   isDefined,
   isErrorLike,
+  isObject,
   MedusaError,
   promiseAll,
   serializeError,
@@ -188,6 +189,7 @@ export class TransactionOrchestrator extends EventEmitter {
       TransactionStepState.DORMANT,
       TransactionStepState.SKIPPED,
     ]
+
     const siblings = step.next.map((sib) => flow.steps[sib])
     return (
       siblings.length === 0 ||
@@ -1208,70 +1210,72 @@ export class TransactionOrchestrator extends EventEmitter {
     while (queue.length > 0) {
       const { obj, level } = queue.shift()
 
-      for (const key of Object.keys(obj)) {
-        if (typeof obj[key] === "object" && obj[key] !== null) {
-          queue.push({ obj: obj[key], level: [...level] })
-        } else if (key === "action") {
-          if (actionNames.has(obj.action)) {
-            throw new Error(
-              `Step ${obj.action} is already defined in workflow.`
-            )
-          }
+      if (obj.action) {
+        if (actionNames.has(obj.action)) {
+          throw new Error(`Step ${obj.action} is already defined in workflow.`)
+        }
 
-          actionNames.add(obj.action)
-          level.push(obj.action)
-          const id = level.join(".")
-          const parent = level.slice(0, level.length - 1).join(".")
+        actionNames.add(obj.action)
+        level.push(obj.action)
+        const id = level.join(".")
+        const parent = level.slice(0, level.length - 1).join(".")
 
-          if (!existingSteps || parent === TransactionOrchestrator.ROOT_STEP) {
-            states[parent].next?.push(id)
-          }
+        if (!existingSteps || parent === TransactionOrchestrator.ROOT_STEP) {
+          states[parent].next?.push(id)
+        }
 
-          const definitionCopy = { ...obj }
-          delete definitionCopy.next
+        const definitionCopy = { ...obj }
+        delete definitionCopy.next
 
-          if (definitionCopy.async) {
-            features.hasAsyncSteps = true
-          }
+        if (definitionCopy.async) {
+          features.hasAsyncSteps = true
+        }
 
-          if (definitionCopy.timeout) {
-            features.hasStepTimeouts = true
-          }
+        if (definitionCopy.timeout) {
+          features.hasStepTimeouts = true
+        }
 
-          if (
-            definitionCopy.retryInterval ||
-            definitionCopy.retryIntervalAwaiting
-          ) {
-            features.hasRetriesTimeout = true
-          }
+        if (
+          definitionCopy.retryInterval ||
+          definitionCopy.retryIntervalAwaiting
+        ) {
+          features.hasRetriesTimeout = true
+        }
+
+        if (definitionCopy.nested) {
+          features.hasNestedTransactions = true
+        }
 
-          if (definitionCopy.nested) {
-            features.hasNestedTransactions = true
+        states[id] = Object.assign(
+          new TransactionStep(),
+          existingSteps?.[id] || {
+            id,
+            uuid: definitionCopy.uuid,
+            depth: level.length - 1,
+            definition: definitionCopy,
+            saveResponse: definitionCopy.saveResponse ?? true,
+            invoke: {
+              state: TransactionStepState.NOT_STARTED,
+              status: TransactionStepStatus.IDLE,
+            },
+            compensate: {
+              state: TransactionStepState.DORMANT,
+              status: TransactionStepStatus.IDLE,
+            },
+            attempts: 0,
+            failures: 0,
+            lastAttempt: null,
+            next: [],
           }
+        )
+      }
 
-          states[id] = Object.assign(
-            new TransactionStep(),
-            existingSteps?.[id] || {
-              id,
-              uuid: definitionCopy.uuid,
-              depth: level.length - 1,
-              definition: definitionCopy,
-              saveResponse: definitionCopy.saveResponse ?? true,
-              invoke: {
-                state: TransactionStepState.NOT_STARTED,
-                status: TransactionStepStatus.IDLE,
-              },
-              compensate: {
-                state: TransactionStepState.DORMANT,
-                status: TransactionStepStatus.IDLE,
-              },
-              attempts: 0,
-              failures: 0,
-              lastAttempt: null,
-              next: [],
-            }
-          )
+      if (Array.isArray(obj.next)) {
+        for (const next of obj.next) {
+          queue.push({ obj: next, level: [...level] })
         }
+      } else if (isObject(obj.next)) {
+        queue.push({ obj: obj.next, level: [...level] })
       }
     }
 

packages/core/types/src/workflows-sdk/service.ts

@@ -1,5 +1,5 @@
 import { FindConfig } from "../common"
-import { IModuleService } from "../modules-sdk"
+import { ContainerLike, IModuleService } from "../modules-sdk"
 import { Context } from "../shared-context"
 import {
   FilterableWorkflowExecutionProps,
@@ -28,6 +28,15 @@ export interface WorkflowOrchestratorRunDTO<T = unknown>
   transactionId?: string
 }
 
+export interface WorkflowOrchestratorCancelOptionsDTO {
+  transactionId: string
+  context?: Context
+  throwOnError?: boolean
+  logOnError?: boolean
+  events?: Record<string, Function>
+  container?: ContainerLike
+}
+
 export type IdempotencyKeyParts = {
   workflowId: string
   transactionId: string
@@ -63,17 +72,11 @@ export interface IWorkflowEngineService extends IModuleService {
     workflowId: string,
     options?: WorkflowOrchestratorRunDTO,
     sharedContext?: Context
-  ): Promise<{
-    errors: Error[]
-    transaction: object
-    result: any
-    acknowledgement: Acknowledgement
-  }>
+  )
 
   getRunningTransaction(
     workflowId: string,
     transactionId: string,
-    options?: Record<string, any>,
     sharedContext?: Context
   ): Promise<unknown>
 
@@ -121,4 +124,10 @@ export interface IWorkflowEngineService extends IModuleService {
     },
     sharedContext?: Context
   )
+
+  cancel(
+    workflowId: string,
+    options: WorkflowOrchestratorCancelOptionsDTO,
+    sharedContext?: Context
+  )
 }

packages/modules/workflow-engine-inmemory/integration-tests/__fixtures__/index.ts

@@ -4,4 +4,5 @@ export * from "./workflow_async"
 export * from "./workflow_conditional_step"
 export * from "./workflow_idempotent"
 export * from "./workflow_step_timeout"
+export * from "./workflow_sync"
 export * from "./workflow_transaction_timeout"

packages/modules/workflow-engine-inmemory/integration-tests/__fixtures__/workflow_sync.ts

@@ -0,0 +1,64 @@
+import {
+  createStep,
+  createWorkflow,
+  StepResponse,
+  WorkflowResponse,
+} from "@medusajs/framework/workflows-sdk"
+
+const step_1 = createStep(
+  "step_1",
+  jest.fn((input) => {
+    input.test = "test"
+    return new StepResponse(input, { compensate: 123 })
+  }),
+  jest.fn((compensateInput) => {
+    if (!compensateInput) {
+      return
+    }
+
+    return new StepResponse({
+      reverted: true,
+    })
+  })
+)
+
+const step_2 = createStep(
+  "step_2",
+  jest.fn((input, context) => {
+    if (input) {
+      return new StepResponse({ notAsyncResponse: input.hey })
+    }
+  }),
+  jest.fn((_, context) => {
+    return new StepResponse({
+      step: context.metadata.action,
+      idempotency_key: context.metadata.idempotency_key,
+      reverted: true,
+    })
+  })
+)
+
+const step_3 = createStep(
+  "step_3",
+  jest.fn((res) => {
+    return new StepResponse({
+      done: {
+        inputFromSyncStep: res.notAsyncResponse,
+      },
+    })
+  })
+)
+
+createWorkflow(
+  {
+    name: "workflow_sync",
+    idempotent: true,
+  },
+  function (input) {
+    step_1(input)
+
+    const ret2 = step_2({ hey: "oh" })
+
+    return new WorkflowResponse(step_3(ret2))
+  }
+)

packages/modules/workflow-engine-inmemory/integration-tests/__tests__/index.spec.ts

@@ -300,6 +300,26 @@ moduleIntegrationTestRunner<IWorkflowEngineService>({
           expect(onFinish).toHaveBeenCalledTimes(0)
         })
 
+        it("should cancel and revert a completed workflow", async () => {
+          const workflowId = "workflow_sync"
+
+          const { acknowledgement, transaction: trx } =
+            await workflowOrcModule.run(workflowId, {
+              input: {
+                value: "123",
+              },
+            })
+
+          expect(trx.getFlow().state).toEqual("done")
+          expect(acknowledgement.hasFinished).toBe(true)
+
+          const { transaction } = await workflowOrcModule.cancel(workflowId, {
+            transactionId: acknowledgement.transactionId,
+          })
+
+          expect(transaction.getFlow().state).toEqual("reverted")
+        })
+
         it("should run conditional steps if condition is true", (done) => {
           void workflowOrcModule.subscribe({
             workflowId: "workflow_conditional_step",

packages/modules/workflow-engine-inmemory/src/services/workflow-orchestrator.ts

@@ -6,7 +6,11 @@ import {
   TransactionStep,
   WorkflowScheduler,
 } from "@medusajs/framework/orchestration"
-import { ContainerLike, MedusaContainer } from "@medusajs/framework/types"
+import {
+  ContainerLike,
+  Context,
+  MedusaContainer,
+} from "@medusajs/framework/types"
 import {
   isString,
   MedusaError,
@@ -18,9 +22,9 @@ import {
   resolveValue,
   ReturnWorkflow,
 } from "@medusajs/framework/workflows-sdk"
+import { WorkflowOrchestratorCancelOptions } from "@types"
 import { ulid } from "ulid"
 import { InMemoryDistributedTransactionStorage } from "../utils"
-import { WorkflowOrchestratorCancelOptions } from "@types"
 
 export type WorkflowOrchestratorRunOptions<T> = Omit<
   FlowRunOptions<T>,
@@ -319,10 +323,8 @@ export class WorkflowOrchestratorService {
   async getRunningTransaction(
     workflowId: string,
     transactionId: string,
-    options?: WorkflowOrchestratorRunOptions<unknown>
+    context?: Context
   ): Promise<DistributedTransactionType> {
-    let { context, container } = options ?? {}
-
     if (!workflowId) {
       throw new Error("Workflow ID is required")
     }
@@ -339,9 +341,7 @@ export class WorkflowOrchestratorService {
       throw new Error(`Workflow with id "${workflowId}" not found.`)
     }
 
-    const flow = exportedWorkflow(
-      (container as MedusaContainer) ?? this.container_
-    )
+    const flow = exportedWorkflow()
 
     const transaction = await flow.getRunningTransaction(transactionId, context)
 

packages/modules/workflow-engine-inmemory/src/services/workflows-module.ts

@@ -18,6 +18,7 @@ import type {
 import { SqlEntityManager } from "@mikro-orm/postgresql"
 import { WorkflowExecution } from "@models"
 import { WorkflowOrchestratorService } from "@services"
+import { WorkflowOrchestratorCancelOptions } from "@types"
 
 type InjectedDependencies = {
   manager: SqlEntityManager
@@ -185,4 +186,16 @@ export class WorkflowsModuleService<
       updated_at <= (CURRENT_TIMESTAMP - INTERVAL '1 second' * retention_time);
     `)
   }
+
+  @InjectSharedContext()
+  async cancel<TWorkflow extends string | ReturnWorkflow<any, any, any>>(
+    workflowIdOrWorkflow: TWorkflow,
+    options: WorkflowOrchestratorCancelOptions,
+    @MedusaContext() context: Context = {}
+  ) {
+    return this.workflowOrchestratorService_.cancel(
+      workflowIdOrWorkflow,
+      options
+    )
+  }
 }

packages/modules/workflow-engine-inmemory/src/types/index.ts

@@ -8,7 +8,8 @@ export type InitializeModuleInjectableDependencies = {
 
 export type WorkflowOrchestratorCancelOptions = Omit<
   FlowCancelOptions,
-  "transaction" | "container"
+  "transaction" | "transactionId" | "container"
 > & {
+  transactionId: string
   container?: ContainerLike
 }

packages/modules/workflow-engine-redis/integration-tests/__fixtures__/index.ts

@@ -1,7 +1,8 @@
 export * from "./workflow_1"
 export * from "./workflow_2"
 export * from "./workflow_async"
+export * from "./workflow_async_compensate"
 export * from "./workflow_step_timeout"
+export * from "./workflow_sync"
 export * from "./workflow_transaction_timeout"
 export * from "./workflow_when"
-export * from "./workflow_async_compensate"