Link Search Menu Expand Document

Streams

The @Stream annotation is used to identify what streams to read from the event store. You can have multiple @Stream annotations onto a ReadModel. To identify what stream you want to read from the Stream has these fields:

  • name - The name of the stream to read from
  • streamType - The type of the stream you want to read from which you can use the enum StreamType (EVENT, CATEGORY or AGGREGATE) to identify. CATEGORY is default
  • subscribed - Whether or not you want to subscribe to the stream. If you want to subscribe to the stream you can leave it blank since the default is true.
  • direction - Which direction you want to read - you can use the enum Direction (FORWARD or BACKWARD)

The name annotation should NOT be the full name that you see in your event store. In this case we use a name generator to create the name that is needed. For example For the example above, you can see we passed in a name of

DewdropAccountAggregate

Since the Stream default type is CATEGORY we end up generating the name

$ce-DewdropAccountAggregate

If the stream type is EVENT we end up generating the name

$et-DewdropAccountAggregate

But, that wouldn’t make sense since this is an AggregateRoot name, a better example would be:

$et-DewdropAccountCreated

Next checkout out how @DewdropCache work:

DewdropCache