# IRPCVault.NotifyDataPushEvent

Location: [gRPC API](https://developer.m-files.com/APIs/gRPC-API/index.md) > [Vault API](https://developer.m-files.com/APIs/gRPC-API/vault/index.md) > [Vault information](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCVault/index.md)

HTML version: https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCVault/NotifyDataPushEvent/

Badges: `Vault API / core` `write` `session`

Notify for server data push message change. In multi-server mode this is broadcast to all nodes and node that has client channel open can continue operation.

- **Service:** [Vault information](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCVault/index.md) `MFiles.IRPCVault`
- **gRPC method:** `/MFiles.IRPCVault/NotifyDataPushEvent`
- **HTTP (mf-http-grpc):** `POST /grpc/v1/notify-data-push-event`
- **Request:** [`NotifyDataPushEventRequest`](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCVault/NotifyDataPushEvent/index.md#request)
- **Response:** [`NotifyDataPushEventResponse`](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCVault/NotifyDataPushEvent/index.md#response)
- **Book and level:** Vault API, core
- **Kind:** write
- **Session:** Required: the session ID from LogIn in the mfiles-session-id-bin metadata.
- **Idempotent:** no
- **Returns metadata structure version:** no
- **Streaming:** none (unary)

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## Remarks

Part of server data push, used by M-Files clients and servers in multi-server deployments to
pass a push event to the server that holds the client's push channel. Applications rarely need
it.

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## Request: NotifyDataPushEventRequest

A structure that specifies notify data push event request.

> Nested message fields are expanded to depth 3; follow a type link for deeper levels and for the type's own page.

| Field | Type | Description |
|---|---|---|
| `request_id` | `int32` | The request id, should match with the request id that was received from of the RequestPushDataAsync call. |
| `notify_type` | [`ServerDataPushNotifyType`](https://developer.m-files.com/APIs/gRPC-API/Reference/Enums/MFiles.ServerDataPushNotifyType/index.md) | The notify type. 0 = unknown, 1 = request, 2 = response, 3 = hearbeat. Values: `SERVER_DATA_PUSH_NOTIFY_TYPE_UNKNOWN` (0), `SERVER_DATA_PUSH_NOTIFY_TYPE_REQUEST` (1), `SERVER_DATA_PUSH_NOTIFY_TYPE_RESPONSE` (2), `SERVER_DATA_PUSH_NOTIFY_TYPE_HEARTBEAT` (3). |

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## Response: NotifyDataPushEventResponse

The response of NotifyDataPushEvent. Has no data.

No fields.