Interface ServiceReference

All Superinterfaces:
AutoCloseable
All Known Implementing Classes:
AbstractServiceReference
public interface ServiceReference extends AutoCloseable
Once a consumer has chosen a service, it builds a ServiceReference managing the binding with the chosen service provider.

The reference lets the consumer: * access the service (via a proxy or a client) with the get() method * release the reference - so the binding between the consumer and the provider is removed

Author:
Clement Escoffier

  • Method Summary

    Modifier and Type
    Method
    Description
    <T> T
    cached()
    Gets the service object if already retrieved.
    <X> X
    cachedAs(Class<X> x)
    Gets the service object if already retrieved.
    <T> T
    get()
    Gets the object to access the service.
    <X> X
    getAs(Class<X> x)
    Gets the object to access the service.
    boolean
    isHolding(Object object)
    Checks whether or not the service reference has the given service object.
    Record
    record()
     
    void
    release()
    Releases the reference.

    Methods inherited from interface AutoCloseable

    close

  • Method Details

    • record

      Record record()
      Returns:
      the service record.

    • get

      <T> T get()
      Gets the object to access the service. It can be a proxy, a client or whatever object. The type depends on the service type and the server itself. This method returns the Java version and primary facet of the object, use getAs(Class) to retrieve the polyglot instance of the object or another facet..
      Returns:
      the object to access the service

    • getAs

      <X> X getAs(Class<X> x)
      Gets the object to access the service. It can be a proxy, a client or whatever object. The type depends on the service type and the server itself. This method wraps the service object into the desired type.
      Type Parameters:
      X - the type of object
      Parameters:
      x - the type of object
      Returns:
      the object to access the service wrapped to the given type

    • cachedAs

      <X> X cachedAs(Class<X> x)
      Gets the service object if already retrieved. It won't try to acquire the service object if not retrieved yet. Unlike cached(), this method return the warpped object to the desired (given) type.
      Type Parameters:
      X - the type of object
      Parameters:
      x - the type of object
      Returns:
      the object, null if not yet retrieved

    • cached

      <T> T cached()
      Gets the service object if already retrieved. It won't try to acquire the service object if not retrieved yet.
      Returns:
      the object, null if not yet retrieved

    • release

      void release()
      Releases the reference. Once released, the consumer must not use the reference anymore. This method must be idempotent and defensive, as multiple call may happen.

    • isHolding

      boolean isHolding(Object object)
      Checks whether or not the service reference has the given service object.
      Parameters:
      object - the service object, must not be null
      Returns:
      true if the service reference service object is equal to the given object, false otherwise.