open-consul/ui/packages/consul-ui/app/components/data-sink/README.mdx

---
class: ember
---
## DataSink

```hbs
<DataSink
  @sink="/dc/nspace/intentions/{{intentions.uid}}"
  @onchange={{action (mut items) value="data"}}
  @onerror={{action (mut error) value="error"}}
  as |api|
></DataSink>
```

### Arguments

| Argument | Type | Default | Description |
| --- | --- | --- | --- |
| `sink` | `String` | | The location of the sink, this should map to a string based URI |
| `data` | `Object` | | The data to be saved to the current instance, null or an empty string means remove |
| `onchange` | `Function` |  | The action to fire when the data has arrived to the sink. Emits an Event-like object with a `data` property containing the data, if the data was deleted this is `undefined`. |
| `onerror` | `Function` |  | The action to fire when an error occurs. Emits ErrorEvent object with an `error` property containing the Error. |

### Methods/Actions/api

| Method/Action |  Description |
| --- | --- |
| `open` | Manually add or remove fom the data sink |

The component takes a `sink` or an identifier (a uri) for the location of a sink and then emits `onchange` events whenever that data has been arrived to the sink (whether persisted or removed). If an error occurs whilst listening for data changes, an `onerror` event is emitted.

Behind the scenes in the Consul UI we map URIs back to our `ember-data` backed `Repositories` meaning we can essentially redesign the URIs used for our data to more closely fit our needs. For example we currently require that **all** HTTP API URIs begin with `/dc/nspace/` values whether they require them or not.

`DataSink` is not just restricted to HTTP API data, and can be configured to listen for data changes using a variety of methods and sources. For example we have also configured `DataSink` to send data to `LocalStorage` using the `settings://` pseudo-protocol in the URI (See examples below).


### Examples

```hbs
  <DataSink @src="/dc/nspace/intentions/{{intention.uid}}"
    @onchange={{action (mut item) value="data"}}
    @onerror={{action (mut error) value="error"}}
    as |api|
  >
    <button type="button" onclick={{action api.open (hash Name="New Name")}}>Create/Update</button>
    <button type="button" onclick={{action api.open null}}>Delete</button>
  </DataSink>
  {{item.Name}}
```

```hbs
  <DataSink @src="/dc/nspace/intentions/{{intention.uid}}"
    @data=(hash Name="New Name")
    @onchange={{action (mut item) value="data"}}
    @onerror={{action (mut error) value="error"}}
  ></DataSink>
  {{item.Name}}
```

### See

- [Component Source Code](./index.js)
- [Template Source Code](./index.hbs)

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