I'm working on an akka-persistence-java-example 
<https://github.com/jansoren/akka-persistence-java-example> and are working 
on the PersistenceQuery.

After reading the events 
<https://github.com/jansoren/akka-persistence-java-example/blob/master/src/main/java/no/jansoren/mymicroservice/eventsourcing/EventStore.java#L34>
 
from the journal I would like to use the events in different projections. 

Which alternative is the best:
1. Read the journal once and use observer pattern to pass the events to the 
different projections?
2. Read the journal once and use akka actors to pass the events to the 
different projections?
3. Read the journal directly for each projection?
4. Others?

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