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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.
* <p>
* The Control object which represents the transaction is given.
* <p>
* 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.
* <p>
* The Control object representing the transaction is given.
* <p>
* 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.
* <p>
* 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;
}
}