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//----------------------------------------------------------------------------
//
// Module:      RegisteredStatics.java
//
// Description: Static Resource management.
//
// Product:     com.sun.jts.CosTransactions
//
// Author:      Simon Holdsworth
//
// Date:        March, 1997
//
// Copyright (c):   1995-1997 IBM Corp.
//
//   The source code for this program is not published or otherwise divested
//   of its trade secrets, irrespective of what has been deposited with the
//   U.S. Copyright Office.
//
//   This software contains confidential and proprietary information of
//   IBM Corp.
//----------------------------------------------------------------------------

package com.sun.jts.CosTransactions;

import java.util.*;

import org.omg.CORBA.*;
import org.omg.CosTransactions.*;

/**
 * The RegisteredStatics class provides operations that manage the set of
 * StaticResource objects and distributes association operations to those
 * registered objects.
 *
 * @version 0.01
 *
 * @author Simon Holdsworth, IBM Corporation
 *
 * @see
 */

//---------------------------------------------------------------------------
// CHANGE HISTORY
//
// Version By     Change Description
//   0.01  SAJH   Initial implementation.
//---------------------------------------------------------------------------

class RegisteredStatics {

    private Vector registered = new Vector();

    /**
     * Default RegisteredStatics constructor.
     *
     * @param
     *
     * @return
     *
     * @see
     */
    RegisteredStatics() {}

    /**
     * Informs all registered objects an association has started.
     * 

* The Control object which represents the transaction is given. *

* A flag is passed indicating whether this association * is as a result of a Current.begin operation. * * @param control The transaction whose association has started. * @param begin Indicates if this is a begin rather than a resume. * * @return * * @see */ void distributeStart(ControlImpl control, boolean begin) { // Determine the Coordinator for the transaction. org.omg.CosTransactions.Coordinator coord = null; try { coord = control.get_coordinator(); } catch (Unavailable exc) {} // Browse through the set, telling each that association is starting. if (coord != null) { for (int i = 0; i < registered.size(); i++) { StaticResource resource = (StaticResource) registered.elementAt(i); try { resource.startAssociation(coord, begin); } catch (INVALID_TRANSACTION exc) { // Catch INVALID_TRANSACTION exception, and allow it to // percolate. We need to inform all previously called // StaticResources that the association has ended // immediately. for (int j = i - 1; j >= 0; j--) { ((StaticResource) registered.elementAt(j)). endAssociation(coord, begin); } throw (INVALID_TRANSACTION)exc.fillInStackTrace(); } catch (Throwable exc) { // discard any other exception } } } } /** * Informs all registered StaticResource objects that a thread association * has ended. *

* The Control object representing the transaction is given. *

* A flag is passed indicating whether this association * is as a result of the transaction completing. * * @param control The transaction whose association has ended. * @param complete Indicates that this is a commit/rollback rather than a * suspend. * * @return * * @see */ void distributeEnd(ControlImpl control, boolean complete) { // Determine the Coordinator for the transaction. org.omg.CosTransactions.Coordinator coord = null; try { coord = control.get_coordinator(); } catch (Unavailable exc) {} // Browse through the set, telling each that the association is ending. if (coord != null) { for (int i = 0; i < registered.size(); i++) { StaticResource resource = (StaticResource)registered.elementAt(i); try { resource.endAssociation(coord, complete); } catch (Throwable e) { // Discard any exception. } } } } /** * Adds the given StaticResource object to the set of those informed of * thread association changes. *

* If there is a current thread association, then the added StaticResource * is called immediately so that it is aware of the association. * * @param obj The StaticResource to be added. * * @return * * @see */ void addStatic(StaticResource obj) { registered.addElement(obj); // Determine whether there is a current association. try { org.omg.CosTransactions.Coordinator coord = CurrentTransaction.getCurrentCoordinator(); // Tell the StaticResource that the association has started. // Pretend that it is a begin association, as the // StaticResource has not seen the transaction before. if (coord != null) { obj.startAssociation(coord, true); } } catch(Throwable exc) { // Discard any exception. } } /** * Removes the given StaticResource object from the set of those * informed of thread association changes. * * @param obj The StaticResource to be removed. * * @return Indicates success of the operation. * * @see */ boolean removeStatic(StaticResource obj) { boolean result = registered.removeElement(obj); return result; } }





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