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/*
* Copyright 2004-2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
//----------------------------------------------------------------------------
//
// Module: CoordinatorImpl.java
//
// Description: Transaction Coordinator base object implementation.
//
// 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 required classes.
import java.util.*;
import org.omg.CORBA.*;
import org.omg.PortableServer.*;
import org.omg.CosTransactions.*;
import com.sun.jts.otsidl.*;
import java.util.logging.Logger;
import java.util.logging.Level;
import com.sun.logging.LogDomains;
import com.sun.jts.utils.LogFormatter;
/**The CoordinatorImpl interface is an extension to the standard Coordinator
* interface that provides the common operations for top-level transactions and
* subtransactions. It is used as a common superclass for the TopCoordinator and
* SubCoordinator classes, and has no implementation.
*
* @version 0.01
*
* @author Simon Holdsworth, IBM Corporation
*
* @see
*/
//----------------------------------------------------------------------------
// CHANGE HISTORY
//
// Version By Change Description
// 0.01 SAJH Initial implementation.
//-----------------------------------------------------------------------------
abstract class CoordinatorImpl extends JCoordinatorPOA implements JCoordinator {
/**Reply action value indicating nothing should be done to the transaction.
*/
static final int doNothing = 1;
/**Reply action value indicating that the transaction should be forgotten.
*/
static final int forgetMe = 2;
/**Reply action value indicating that the transaction has active children.
*/
static final int activeChildren = 3;
/**OMG Coordinator operation required of all subclasses.
*/
public abstract Status get_status();
/**OMG Coordinator operation required of all subclasses.
*/
public abstract Status get_parent_status();
/**OMG Coordinator operation required of all subclasses.
*/
public abstract Status get_top_level_status();
/**OMG Coordinator operation required of all subclasses.
*/
public abstract boolean is_same_transaction( Coordinator other );
/**OMG Coordinator operation required of all subclasses.
*/
public abstract boolean is_related_transaction( Coordinator other );
/**OMG Coordinator operation required of all subclasses.
*/
public abstract boolean is_ancestor_transaction( Coordinator other );
/**OMG Coordinator operation required of all subclasses.
*/
public abstract boolean is_descendant_transaction( Coordinator other );
/**OMG Coordinator operation required of all subclasses.
*/
public abstract boolean is_top_level_transaction();
/**OMG Coordinator operation required of all subclasses.
*/
public abstract int hash_transaction();
/**OMG Coordinator operation required of all subclasses.
*/
public abstract int hash_top_level_tran();
/*
Logger to log transaction messages
*/
static Logger _logger = LogDomains.getLogger(LogDomains.TRANSACTION_LOGGER);
/**OMG Coordinator operation required of all subclasses.
*
* @exception Inactive The Coordinator is completing the transaction and
* cannot accept this registration.
*/
public abstract RecoveryCoordinator register_resource( Resource res )
throws Inactive;
/**OMG Coordinator operation required of all subclasses.
*
* @exception NotSubtransaction The Coordinator represents a top-level
* transaction and cannot accept the registration.
* @exception Inactive The Coordinator is completing the transaction and
* cannot accept this registration.
*/
public abstract
void register_subtran_aware( SubtransactionAwareResource sares )
throws Inactive, NotSubtransaction;
/**OMG Coordinator operation required of all subclasses.
*
* @exception Inactive The Coordinator is already completing the transaction.
*/
public abstract void rollback_only()
throws Inactive;
/**OMG Coordinator operation required of all subclasses.
*/
public abstract String get_transaction_name();
/**OMG Coordinator operation required of all subclasses.
*
* @exception Inactive The Coordinator is completing the transaction and
* cannot create a new child.
* @exception SubtransactionsUnavailable Subtransactions are not available.
*/
public abstract Control create_subtransaction()
throws Inactive, SubtransactionsUnavailable;
/**OMG Coordinator operation required of all subclasses.
*
* @exception Inactive The Coordinator is completing the transaction and
* cannot accept the registration.
* @exception SynchronizationUnavailable Synchronization is not supported.
*/
public abstract void register_synchronization( Synchronization sync )
throws Inactive, SynchronizationUnavailable;
/**OMG Coordinator operation required of all subclasses.
*
* @exception Inactive The Coordinator is completing the transaction.
*/
public abstract PropagationContext get_txcontext()
throws Unavailable;
/**IDL JCoordinator operation required of all subclasses.
*
* @exception Unavailable The global transaction identifier is not available.
*/
public abstract otid_t getGlobalTID();
/**IDL JCoordinator operation required of all subclasses.
*/
public abstract long getLocalTID();
/**IDL JCoordinator operation required of all subclasses.
*/
public abstract TransIdentity[] getAncestors();
/**IDL JCoordinator operation required of all subclasses.
*/
public abstract boolean isRollbackOnly();
/**Add the given Coordinator reference to the set of children of the target
* object.
*/
abstract boolean addChild( CoordinatorImpl child );
/**Remove the given Coordinator reference from the set of children. If the
* target object is temporary, and no longer has any children or registered
* resources, it destroys itself before returning.
*/
abstract boolean removeChild( CoordinatorImpl child );
/**Direct the CoordinatorImpl to prepare to commit. If there are active
* subtransactions, the operation raises the INVALID_TRANSACTION standard
* exception. Otherwise the CoordinatorImpl directs all registered Resources to
* prepare, and returns the consolidated result to the caller. The
* CoordinatorImpl must guarantee that each Resource object registered with it
* receives at most one prepare request (This includes the case where the
* Recoverable Server registers the same Resource twice).
*
* @exception INVALID_TRANSACTION Indicates that the transaction may not be
* committed due to outstanding work.
* @exception HeuristicMixed Indicates that a participant voted to roll the
* transaction back, but one or more others have already heuristically committed.
* @exception HeuristicHazard Indicates that a participant voted to roll the
* transaction back, but one or more others may have already heuristically
* committed.
*/
abstract Vote prepare()
throws INVALID_TRANSACTION, HeuristicMixed, HeuristicHazard;
/**Direct the CoordinatorImpl to commit. The CoordinatorImpl directs all
* registered Resources to commit. Those Resources that raised heuristic
* exceptions are subsequently told to forget the transaction. If there are
* no registered Synchronization objects, and the CoordinatorImpl is not the
* root, it removes itself from the TransactionManager associations and
* destroys itself before returning.
*
* @exception HeuristicMixed Indicates that heuristic decisions have been
* taken which have resulted in part of the transaction being rolled back.
* @exception HeuristicHazard Indicates that heuristic decisions may have been
* taken which have resulted in part of the transaction being rolled back.
* @exception NotPrepared Indicates that the transaction has not been prepared.
*/
abstract void commit()
throws HeuristicMixed, HeuristicHazard, NotPrepared;
/**Direct the CoordinatorImpl to commit in one phase if possible. If the
* coordinator has a single resource registered it will flow the
* commit_one_phase mehtod to it, if it has >1 resource the method will
* return false indicating two phase commit is required.
* Other than that the method behaves as commit.
*
* @exception HeuristicMixed Indicates that heuristic decisions have been
* taken which have resulted in part of the transaction being rolled back.
* @exception HeuristicHazard Indicates that heuristic decisions may have been
* taken which have resulted in part of the transaction being rolled back.
*/
abstract boolean commitOnePhase()
throws HeuristicMixed, HeuristicHazard;
/**Direct the CoordinatorImpl to rollback the transaction. It directs every
* registered Resource to rollback. Those Resources that raised heuristic
* exceptions are subsequently told to forget the transaction. If there are
* no registered Synchronization objects, the CoordinatorImpl removes itself
* from the TransactionManager associations and destroys itself before
* returning.
* If force is TRUE, the coordinator is rolled back even if this could compromise
* data integrity (i.e. even if the coordinator is prepared). If force is FALSE,
* no attempt is made to roll back the coordinator if it is prepared and FALSE
* is returned from the method.
*
* @exception HeuristicMixed Indicates that heuristic decisions have been
* taken which have resulted in part of the transaction being rolled back.
* @exception HeuristicHazard Indicates that heuristic decisions may have been
* taken which have resulted in part of the transaction being rolled back.
*/
abstract void rollback( boolean force )
throws HeuristicMixed, HeuristicHazard;
/**Inform the CoordinatorImpl of an imminent reply. If the CoordinatorImpl has
* active children, it returns activeChildren. If the CoordinatorImpl has
* already been registered, the operation returns doNothing. Otherwise the
* CoordinatorImpl returns forgetMe, and the output parameter is set to the
* parent CoordinatorImpl, if any.
*/
abstract CoordinatorImpl replyAction( int[/*1*/] action )
throws SystemException;
/**Inform the CoordinatorImpl that it is no longer a temporary construct.
* This is used when a request is received for an CoordinatorImpl that was
* created as a temporary ancestor of a subtransaction.
*/
abstract Long setPermanent();
/**Return a boolean value indicating whether the CoordinatorImpl is in an
* active state (i.e. not preparing or later states).
*/
abstract boolean isActive();
/**Return a boolean value indicating whether the CoordinatorImpl has registered
* with its superior (if any).
*/
abstract boolean hasRegistered();
/**Record the object that is normally responsible for directing the
* CoordinatorImpl through termination. For a root CoordinatorImpl, this is a
* CoordinatorTerm object; for a subordinate it is a CoordinatorResource.
*/
abstract void setTerminator( CompletionHandler terminator );
/**Return the parent coordinator.
*/
abstract Coordinator getParent();
/**Return the superior coordinator.
*/
abstract Coordinator getSuperior();
/**Returns the object normally responsible for terminating the transaction.
*/
abstract CompletionHandler getTerminator();
/**Cleans up an empty Coordinator object which was created temporarily for a
* read-only transactional request.
*/
abstract void cleanUpEmpty( CoordinatorImpl forgetParent );
/**Clean up the state of the object.
*/
public abstract void doFinalize();
private static POA poa = null;
private Coordinator thisRef = null;
/**Returns a CORBA object which represents the transaction.
*/
synchronized final Coordinator object() {
if( thisRef == null ) {
if( poa == null )
poa = Configuration.getPOA("Coordinator"/*#Frozen*/);
try {
poa.activate_object(this);
thisRef = CoordinatorHelper.narrow(poa.servant_to_reference(this));
} catch( Exception exc ) {
_logger.log(Level.SEVERE,"jts.create_coordinator_object_error",exc);
String msg = LogFormatter.getLocalizedMessage(_logger,
"jts.create_coordinator_object_error");
throw new org.omg.CORBA.INTERNAL(msg);
}
}
return thisRef;
}
/**Returns the CoordinatorImpl which serves the given object.
*/
synchronized static final CoordinatorImpl servant( Coordinator coord ) {
CoordinatorImpl result = null;
if( coord instanceof CoordinatorImpl )
result = (CoordinatorImpl)coord;
else if( poa != null ) {
JCoordinator jcoord = JCoordinatorHelper.narrow(coord);
if( jcoord != null )
try {
result = (CoordinatorImpl)poa.reference_to_servant(jcoord);
if( result.thisRef == null )
result.thisRef = jcoord;
} catch( Exception exc ) {
_logger.log(Level.WARNING,"jts.cannot_locate_servant","Coordinator");
}
}
return result;
}
/**Destroys the CoordinatorImpl object reference.
*/
synchronized final void destroy() {
if( poa != null && thisRef != null )
try {
poa.deactivate_object(poa.reference_to_id(thisRef));
thisRef = null;
} catch( Exception exc ) {
_logger.log(Level.WARNING,"jts.object_destroy_error","Coordinator");
}
}
/*
* These methods are there to satisy the compiler. At some point
* when we move towards a tie based model, the org.omg.Corba.Object
* interface method implementation below shall be discarded.
*/
private static org.omg.CORBA.NO_IMPLEMENT no_implement =
new org.omg.CORBA.NO_IMPLEMENT("This is a locally constrained object.");
public org.omg.CORBA.Object _duplicate() {
throw no_implement;
}
public void _release() {
throw no_implement;
}
public boolean _is_a(String repository_id) {
throw no_implement;
}
public boolean _is_equivalent(org.omg.CORBA.Object that) {
throw no_implement;
}
public boolean _non_existent() {
throw no_implement;
}
public int _hash(int maximum) {
throw no_implement;
}
public Request _request(String operation) {
throw no_implement;
}
public Request _create_request(Context ctx,
String operation,
NVList arg_list,
NamedValue result) {
throw no_implement;
}
public Request _create_request(Context ctx,
String operation,
NVList arg_list,
NamedValue result,
ExceptionList exceptions,
ContextList contexts) {
throw no_implement;
}
public org.omg.CORBA.Object _get_interface_def() {
throw no_implement;
}
public org.omg.CORBA.Policy _get_policy(int policy_type) {
throw no_implement;
}
public org.omg.CORBA.DomainManager[] _get_domain_managers() {
throw no_implement;
}
public org.omg.CORBA.Object _set_policy_override(
org.omg.CORBA.Policy[] policies,
org.omg.CORBA.SetOverrideType set_add) {
throw no_implement;
}
}
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