deep-c-rsc/JCGO/classpath-0.93/org/omg/PortableServer/POAManagerOperations.java

/* POAManagerOperations.java --
   Copyright (C) 2005 Free Software Foundation, Inc.

This file is part of GNU Classpath.

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package org.omg.PortableServer;

import org.omg.PortableServer.POAManagerPackage.AdapterInactive;
import org.omg.PortableServer.POAManagerPackage.State;

/**
 * Defines the operations, applicable to the {@link POAManager}.
 * These operations can turn the associated POAs to and from holding,
 * active and discarding states, but the incative state is irreversible.
 * The inactivated POAs can only be recreated after they were destroyed.
 *
 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
 */
public interface POAManagerOperations
{
  /**
   * Turns the associated POAs into active state, allowing them to receive
   * and process requests.
   *
   * @throws AdapterInactive if the POAs are in the inactive state. If
   * once inactivated, the POA cannot be activated again.
   * This method can only be called to leave the holding or discarding state.
   */
  void activate()
         throws AdapterInactive;

  /**
   * <p>
   * Turns the asociated POAs into inactive state. The POAs in the incative
   * state will reject new requests. A cliet, trying to invoke an
   * object, belonging to the inactivated POA, will receive the remote exception
   * ({@link org.omg.CORBA.OBJ_ADAPTER}, minor code 0x535503ea, incomplete).
   * </p><p>
   * If the POA is once inactivated, it cannot be activated again.
   * The operation is used when the associated POAs are to be shut down.
   * </p>
   * <p>
   * Some independent implementations may set the minor code of the
   * OBJ_ADAPTER to 1, as recommended by OMG (formal/04-03-12).
   * The interoperable systems should expect any of these two values.
   * </p>
   *
   * @param etherealize_objects if true, the servant managers of the
   * associated POAs, having RETAIN and USE_SERVANT_MANAGER policies,
   * will receive a call of {@link ServantActivatorOperations#etherealize}.
   *
   * @param wait_for_completion if true, the method call suspends the current
   * thread till POAs complete the requests they are currently processing. If
   * false, the method returns immediately.
   * <p>
   *
   * @specnote The 0x535503ea is a Sun specific minor exception code 1002,
   * used for interoperability reasons.
   *
   * @throws AdapterInactive if the POAs are already in the inactive state.
   *
   * @see POAOperations#destroy
   */
  void deactivate(boolean etherealize_objects, boolean wait_for_completion)
           throws AdapterInactive;

  /**
   * <p>
   * Turns the associated POAs into discaring state. In this state, the POAs
   * discard the incoming requests. This mode is used in situations when
   * the server is flooded with requests. The client receives remote exception
   * ({@link org.omg.CORBA.TRANSIENT}, minor code 0x535503e9, incomplete).
   * </p><p>
   * Some independent implementations may set the minor code of the
   * TRANSIENT to 1, as recommended by OMG (formal/04-03-12).
   * The interoperable systems should expect any of these two values.
   * </p>
   *
   * @param wait_for_completion if true, the method call suspends the current
   * thread till POAs complete the requests they are currently processing. If
   * false, the method returns immediately.
   *
   * @specnote The 0x535503e9 is a Sun specific minor exception code 1001,
   * used for interoperability reasons.
   *
   * @throws AdapterInactive if the POAs are in the inactive state.
   */
  void discard_requests(boolean wait_for_completion)
                 throws AdapterInactive;

  /**
   * Get the state of the POA manager.
   */
  State get_state();

  /**
   * Turns the associated POAs into holding state. In this state, the POAs
   * queue incoming requests but do not process them.
   *
   * @param wait_for_completion if true, the method call suspends the current
   * thread till POAs complete the requests they are currently processing. If
   * false, the method returns immediately.

   * @throws AdapterInactive if the POAs are in the inactive state.
   */
  void hold_requests(boolean wait_for_completion)
              throws AdapterInactive;
}