# Azure Event Hubs Writer

## <img src="/files/Gy2eCeBHTJuVUJuExZsN" alt="" data-size="line"> Azure Event Hubs Writer

### Description <a href="#description" id="description"></a>

The Azure Event Hubs Writer transform allows you to write messages (events) to a streaming service bus called Event Hubs on the Microsoft Azure cloud platform.

| Hop Engine | <sup>✓</sup> |
| ---------- | ------------ |
| Spark      | X            |
| Flink      | X            |
| Dataflow   | X            |

### Options

Here are the important options to fill in to get the transform to work:

* Event Hubs namespace: the name of your Event Hubs namespace
* Event Hubs instance name: the name of the Event Hub, the instance itself.
* SAS Policy key name: the name of the policy in the "Shared Access Policies" section of the Event Hubs Namespace in the Azure dashboard. This needs to be a policy with the "Send" claim enabled.
* SAS Key connection string: You can use the value in the policy labeled "Connection string–primary key"
* Batch size: the number of messages (events) to send in one batch with each call to Azure.
* Message field: the field containing the message to use as the events. Please note you can use a transform like JSON Output or "Java Script" to assemble the message.


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