Package org.apache.camel

Interface IsSingleton

All Known Subinterfaces:
ApiEndpoint, AsyncEndpoint, AsyncProducer, BrowsableEndpoint, DelegateEndpoint, Endpoint, InterceptSendToEndpoint, Producer
public interface IsSingleton
Used for defining if a given class is singleton or not. If the class is a singleton, then a single instance will be shared (and hence should be treated as immutable and be used in a thread-safe manner).

This interface is not implemented as a marker interface (i.e., it's necessary to read isSingleton() instead of instanceof(IsSingleton)). This allows for subclasses to have a singleton status different from a parent and for objects to have this value dynamically changed.

Camel component are very often singleton based, only a few components are not.

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    isSingleton()
    Whether this class supports being singleton or not.
    static boolean
    test(Object instance)
    Test if the given instance is a singleton or not.

  • Method Details

    • test

      static boolean test(Object instance)
      Test if the given instance is a singleton or not.
      Parameters:
      instance - the instance ot check
      Returns:
      true if the given instance is a singleton

    • isSingleton

      boolean isSingleton()
      Whether this class supports being singleton or not.
      Returns:
      true to be a singleton shared instance, false to create new instances.