Package org.occurrent.subscription

Interface SubscriptionPosition

All Known Implementing Classes:
StringBasedSubscriptionPosition
public interface SubscriptionPosition
Represents the position for a subscription. Note that this is not the same as a CloudEvent position in an event stream. Rather the subscription position is the position for a particular subscriber that streams events from a subscription.

There can be multiple implementations of a SubscriptionPosition for a database but each implementation must be able to return the subscription position as a String. Implementations can provide optimized data structures for a particular database. For example if you're streaming changes from a MongoDB event store and persists the position in MongoDB one could return the MongoDB "Document" after having casted the SubscriptionPosition to a MongoDB specific implementation. Thus there's no need to serialize the "Document" representing the subscription position to a String and back to a Document again.

  • Method Summary

    Modifier and Type
    Method
    Description
    String
    asString()
     

  • Method Details