Package org.projectnessie.events.service

Class EventSubscribers

  • All Implemented Interfaces:
    java.lang.AutoCloseable
    public class EventSubscribers
extends java.lang.Object
implements java.lang.AutoCloseable
    Loads and holds all EventSubscribers.

    The main purpose of this class is to provide a single point of access to all subscribers, and also to provide a bit-mask of all event types that subscribers are subscribed to, for a fast and efficient type-based event filtering.

    This class is meant to be used as a singleton, or in CDI Dependent pseudo-scope.

    • Constructor Summary

      Constructors 
      Constructor Description
      EventSubscribers​(java.lang.Iterable<org.projectnessie.events.spi.EventSubscriber> subscribers)  
      EventSubscribers​(org.projectnessie.events.spi.EventSubscriber... subscribers)  

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void close()  
      java.util.List<org.projectnessie.events.spi.EventSubscriber> getSubscribers()
      Returns an unmodifiable list of all subscribers.
      java.util.Map<org.projectnessie.events.spi.EventSubscription,​org.projectnessie.events.spi.EventSubscriber> getSubscriptions()
      Returns an unmodifiable map of all active subscriptions with their subscribers.
      boolean hasSubscribersFor​(org.projectnessie.events.api.EventType type)
      Returns true if there are any subscribers for the given EventType.
      boolean hasSubscribersFor​(org.projectnessie.versioned.ResultType resultType)
      Returns true if there are any subscribers for the given ResultType.
      static java.util.List<org.projectnessie.events.spi.EventSubscriber> loadSubscribers()
      Load all EventSubscribers via ServiceLoader.
      void start​(java.util.function.Function<org.projectnessie.events.spi.EventSubscriber,​org.projectnessie.events.spi.EventSubscription> subscriptionFactory)
      Starts all subscribers.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • EventSubscribers

        public EventSubscribers​(org.projectnessie.events.spi.EventSubscriber... subscribers)

      • EventSubscribers

        public EventSubscribers​(java.lang.Iterable<org.projectnessie.events.spi.EventSubscriber> subscribers)

    • Method Detail

      • loadSubscribers

        public static java.util.List<org.projectnessie.events.spi.EventSubscriber> loadSubscribers()
        Load all EventSubscribers via ServiceLoader.

      • start

        public void start​(java.util.function.Function<org.projectnessie.events.spi.EventSubscriber,​org.projectnessie.events.spi.EventSubscription> subscriptionFactory)
        Starts all subscribers.
        Parameters:
        subscriptionFactory - a function that creates a subscription for a subscriber

      • close

        public void close()
        Specified by:
        close in interface java.lang.AutoCloseable

      • getSubscribers

        public java.util.List<org.projectnessie.events.spi.EventSubscriber> getSubscribers()
        Returns an unmodifiable list of all subscribers.

      • getSubscriptions

        public java.util.Map<org.projectnessie.events.spi.EventSubscription,​org.projectnessie.events.spi.EventSubscriber> getSubscriptions()
        Returns an unmodifiable map of all active subscriptions with their subscribers. Returns null if start(Function) has not been called yet.

      • hasSubscribersFor

        public boolean hasSubscribersFor​(org.projectnessie.events.api.EventType type)
        Returns true if there are any subscribers for the given EventType.

      • hasSubscribersFor

        public boolean hasSubscribersFor​(org.projectnessie.versioned.ResultType resultType)
        Returns true if there are any subscribers for the given ResultType.