Package org.apache.avalon.framework.service

Class DefaultServiceManager

  • All Implemented Interfaces:
    ServiceManager
    public class DefaultServiceManager
extends java.lang.Object
implements ServiceManager
    This class is a static implementation of a ServiceManager. Allow ineritance and extension so you can generate a tree of ServiceManager each defining Object scope.
    Version:
    CVS $Revision: 1.20 $ $Date: 2004/02/11 14:34:26 $
    Author:
    Avalon Development Team

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      protected void checkWriteable()
      Checks if this ServiceManager is writeable.
      protected java.util.Map getObjectMap()
      Helper method for subclasses to retrieve object map.
      protected ServiceManager getParent()
      Helper method for subclasses to retrieve parent.
      boolean hasService​(java.lang.String key)
      Check to see if a Object exists for a key.
      java.lang.Object lookup​(java.lang.String key)
      Retrieve Object by key from ServiceManager.
      void makeReadOnly()
      Makes this ServiceManager read-only.
      void put​(java.lang.String key, java.lang.Object object)
      Place Object into ServiceManager.
      void release​(java.lang.Object object)
      Release the Object.
      java.lang.String toString()
      Build a human readable representation of this ServiceManager.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • DefaultServiceManager

        public DefaultServiceManager()
        Construct ServiceManager with no parent.

      • DefaultServiceManager

        public DefaultServiceManager​(ServiceManager parent)
        Construct ServiceManager with specified parent.
        Parameters:
        parent - this ServiceManager's parent

    • Method Detail

      • lookup

        public java.lang.Object lookup​(java.lang.String key)
                        throws ServiceException
        Retrieve Object by key from ServiceManager.
        Specified by:
        lookup in interface ServiceManager
        Parameters:
        key - the key
        Returns:
        the Object
        Throws:
        ServiceException - if an error occurs

      • hasService

        public boolean hasService​(java.lang.String key)
        Check to see if a Object exists for a key.
        Specified by:
        hasService in interface ServiceManager
        Parameters:
        key - a string identifying the key to check.
        Returns:
        True if the object exists, False if it does not.

      • put

        public void put​(java.lang.String key,
                java.lang.Object object)
        Place Object into ServiceManager.
        Parameters:
        key - the object's key
        object - an Object value

      • toString

        public java.lang.String toString()
        Build a human readable representation of this ServiceManager.
        Overrides:
        toString in class java.lang.Object
        Returns:
        the description of this ServiceManager

      • getParent

        protected final ServiceManager getParent()
        Helper method for subclasses to retrieve parent.
        Returns:
        the parent ServiceManager

      • getObjectMap

        protected final java.util.Map getObjectMap()
        Helper method for subclasses to retrieve object map.
        Returns:
        the object map

      • makeReadOnly

        public void makeReadOnly()
        Makes this ServiceManager read-only.

      • checkWriteable

        protected final void checkWriteable()
                             throws java.lang.IllegalStateException
        Checks if this ServiceManager is writeable.
        Throws:
        java.lang.IllegalStateException - if this ServiceManager is read-only

      • release

        public void release​(java.lang.Object object)
        Release the Object.
        Specified by:
        release in interface ServiceManager
        Parameters:
        object - The Object to release.