---
displayed_sidebar: servicesSidebar
---

import ParameterTypes from "@site/src/components/ParameterTypes"

# IdempotencyKeyService

## Constructors

#### constructor

`**new IdempotencyKeyService**(«destructured»)`

##### Parameters

<ParameterTypes parameters={[
  {
    "name": "__namedParameters",
    "type": "[InjectedDependencies](../types/InjectedDependencies-13.mdx)",
    "description": "",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  }
]} />

## Properties

<ParameterTypes parameters={[
  {
    "name": "__configModule__",
    "type": "`Record<string, unknown>`",
    "description": "",
    "optional": true,
    "defaultValue": "",
    "expandable": false,
    "children": []
  },
  {
    "name": "__container__",
    "type": "`any`",
    "description": "",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  },
  {
    "name": "__moduleDeclaration__",
    "type": "`Record<string, unknown>`",
    "description": "",
    "optional": true,
    "defaultValue": "",
    "expandable": false,
    "children": []
  },
  {
    "name": "idempotencyKeyRepository_",
    "type": "Repository&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;",
    "description": "",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  },
  {
    "name": "manager_",
    "type": "EntityManager",
    "description": "",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  },
  {
    "name": "transactionManager_",
    "type": "`undefined` \\| EntityManager",
    "description": "",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  }
]} />

## Accessors

#### activeManager\_

 `Protected` **activeManager\_**: [object Object]

## Methods

#### atomicPhase\_

`Protected **atomicPhase_**<TypeParameter TResult, TypeParameter TError>(work, isolationOrErrorHandler?, maybeErrorHandlerOrDontFail?): Promise&#60;TResult&#62;`

Wraps some work within a transactional block. If the service already has
a transaction manager attached this will be reused, otherwise a new
transaction manager is created.

##### Type Parameters

<ParameterTypes parameters={[
  {
    "name": "TResult",
    "type": "`object`",
    "description": "",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  },
  {
    "name": "TError",
    "type": "`object`",
    "description": "",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  }
]} />

##### Parameters

<ParameterTypes parameters={[
  {
    "name": "work",
    "type": "(`transactionManager`: EntityManager) => Promise&#60;TResult&#62;",
    "description": "the transactional work to be done",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  },
  {
    "name": "isolationOrErrorHandler",
    "type": "`IsolationLevel` \\| (`error`: `TError`) => Promise&#60;void \\| TResult&#62;",
    "description": "the isolation level to be used for the work.",
    "optional": true,
    "defaultValue": "",
    "expandable": false,
    "children": []
  },
  {
    "name": "maybeErrorHandlerOrDontFail",
    "type": "(`error`: `TError`) => Promise&#60;void \\| TResult&#62;",
    "description": "Potential error handler",
    "optional": true,
    "defaultValue": "",
    "expandable": false,
    "children": []
  }
]} />

##### Returns

Promise&#60;TResult&#62;

<ParameterTypes parameters={[
  {
    "name": "Promise",
    "type": "Promise&#60;TResult&#62;",
    "optional": false,
    "defaultValue": "",
    "description": "the result of the transactional work",
    "expandable": false,
    "children": []
  }
]} />

___

#### create

`**create**(payload): Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;`

Creates an idempotency key for a request.
If no idempotency key is provided in request, we will create a unique
identifier.

##### Parameters

<ParameterTypes parameters={[
  {
    "name": "payload",
    "type": "[CreateIdempotencyKeyInput](../types/CreateIdempotencyKeyInput.mdx)",
    "description": "payload of request to create idempotency key for",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  }
]} />

##### Returns

Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;

<ParameterTypes parameters={[
  {
    "name": "Promise",
    "type": "Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;",
    "optional": false,
    "defaultValue": "",
    "description": "the created idempotency key",
    "expandable": false,
    "children": []
  }
]} />

___

#### initializeRequest

`**initializeRequest**(headerKey, reqMethod, reqParams, reqPath): Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;`

Execute the initial steps in a idempotent request.

##### Parameters

<ParameterTypes parameters={[
  {
    "name": "headerKey",
    "type": "`string`",
    "description": "potential idempotency key from header",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  },
  {
    "name": "reqMethod",
    "type": "`string`",
    "description": "method of request",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  },
  {
    "name": "reqParams",
    "type": "`Record<string, unknown>`",
    "description": "params of request",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  },
  {
    "name": "reqPath",
    "type": "`string`",
    "description": "path of request",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  }
]} />

##### Returns

Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;

<ParameterTypes parameters={[
  {
    "name": "Promise",
    "type": "Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;",
    "optional": false,
    "defaultValue": "",
    "description": "the existing or created idempotency key",
    "expandable": false,
    "children": []
  }
]} />

___

#### lock

`**lock**(idempotencyKey): Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;`

Locks an idempotency.

##### Parameters

<ParameterTypes parameters={[
  {
    "name": "idempotencyKey",
    "type": "`string`",
    "description": "key to lock",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  }
]} />

##### Returns

Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;

<ParameterTypes parameters={[
  {
    "name": "Promise",
    "type": "Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;",
    "optional": false,
    "defaultValue": "",
    "description": "result of the update operation",
    "expandable": false,
    "children": []
  }
]} />

___

#### retrieve

`**retrieve**(idempotencyKeyOrSelector): Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;`

Retrieves an idempotency key

##### Parameters

<ParameterTypes parameters={[
  {
    "name": "idempotencyKeyOrSelector",
    "type": "`string` \\| [Selector](../types/Selector.mdx)&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;",
    "description": "key or selector to retrieve",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  }
]} />

##### Returns

Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;

<ParameterTypes parameters={[
  {
    "name": "Promise",
    "type": "Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;",
    "optional": false,
    "defaultValue": "",
    "description": "idempotency key",
    "expandable": false,
    "children": []
  }
]} />

___

#### shouldRetryTransaction\_

`Protected **shouldRetryTransaction_**(err): boolean`

##### Parameters

<ParameterTypes parameters={[
  {
    "name": "err",
    "type": "`Record<string, unknown>` \\| ``{ code: string  }``",
    "description": "",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  }
]} />

##### Returns

`boolean`

<ParameterTypes parameters={[
  {
    "name": "boolean",
    "type": "`boolean`",
    "optional": true,
    "defaultValue": "",
    "description": "",
    "expandable": false,
    "children": []
  }
]} />

___

#### update

`**update**(idempotencyKey, update): Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;`

Locks an idempotency.

##### Parameters

<ParameterTypes parameters={[
  {
    "name": "idempotencyKey",
    "type": "`string`",
    "description": "key to update",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  },
  {
    "name": "update",
    "type": "DeepPartial&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;",
    "description": "update object",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  }
]} />

##### Returns

Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;

<ParameterTypes parameters={[
  {
    "name": "Promise",
    "type": "Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;",
    "optional": false,
    "defaultValue": "",
    "description": "result of the update operation",
    "expandable": false,
    "children": []
  }
]} />

___

#### withTransaction

`**withTransaction**(transactionManager?): [IdempotencyKeyService](IdempotencyKeyService.mdx)`

##### Parameters

<ParameterTypes parameters={[
  {
    "name": "transactionManager",
    "type": "EntityManager",
    "description": "",
    "optional": true,
    "defaultValue": "",
    "expandable": false,
    "children": []
  }
]} />

##### Returns

[IdempotencyKeyService](IdempotencyKeyService.mdx)

<ParameterTypes parameters={[
  {
    "name": "IdempotencyKeyService",
    "type": "[IdempotencyKeyService](IdempotencyKeyService.mdx)",
    "optional": false,
    "defaultValue": "",
    "description": "",
    "expandable": false,
    "children": []
  }
]} />

___

#### workStage

`**workStage**(idempotencyKey, callback): Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;`

Performs an atomic work stage.
An atomic work stage contains some related functionality, that needs to be
transactionally executed in isolation. An idempotent request will
always consist of 2 or more of these phases. The required phases are
"started" and "finished".

##### Parameters

<ParameterTypes parameters={[
  {
    "name": "idempotencyKey",
    "type": "`string`",
    "description": "current idempotency key",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  },
  {
    "name": "callback",
    "type": "(`transactionManager`: EntityManager) => Promise&#60;[IdempotencyCallbackResult](../types/IdempotencyCallbackResult.mdx)&#62;",
    "description": "functionality to execute within the phase",
    "optional": false,
    "defaultValue": "",
    "expandable": false,
    "children": []
  }
]} />

##### Returns

Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;

<ParameterTypes parameters={[
  {
    "name": "Promise",
    "type": "Promise&#60;[IdempotencyKey](IdempotencyKey.mdx)&#62;",
    "optional": false,
    "defaultValue": "",
    "description": "new updated idempotency key",
    "expandable": false,
    "children": []
  }
]} />