Alternative to $all that doesn't show all the system events?

EventStoreDB
1

Is there another stream that can show me all the events, but exclude the system events?

Thanks,

Josh

2

Not that I’m aware of. However, you could try with a projection; maybe something similar to:

fromStream(’$all’)

.when({ $any: function(s,e) {

if (e.Type.substring(0,1) != “$”)

linkTo(“all”, e);

}})

3

To improve the projection above
fromAll()

.when({
$any: function(s,e) {
linkTo(“all”, e);

   }

})

``

When using fromAll, the events flow through a filter that should filter out all system streams for you so you don’t need to recode that logic into a projection that uses fromAll

4

That’s great info (would love to find that documented somewhere). However, I’ve just tried it and the last events in the stream seem to be ACL events: type $metadata having names such as 0@$$2016-01-26 and data:

{
  "$acl": {}
}
5

fromAll will filter out system streams, but still includes the metadata of any non-system streams.

6

you can use this to get rid of more system messages…

        if (arg2.OriginalStreamId.Contains("$")) return;

…

private void HandleEvent(EventStoreCatchUpSubscription arg1, ResolvedEvent arg2)

{

if (arg2.OriginalStreamId.Contains("$")) return;

var @event = arg2.DeserializeEvent();

if (@event != null)

_bus.Publish(@event);

_checkpointerCounter.Set(arg2.OriginalEventNumber);

}