com.sun.jini.mahalo

Class TxnMgrProxy

java.lang.Object

com.sun.jini.mahalo.TxnMgrProxy

All Implemented Interfaces:

MarshalPivotProvider, Externalizable, Serializable, Remote, Administrable, ExtendedTransactionManager, TransactionConstants, TransactionManager, ReferentUuid

public class TxnMgrProxy
extends Object
implements ExtendedTransactionManager, Administrable, Externalizable, ReferentUuid, MarshalPivotProvider

A TxnMgrProxy is a proxy for the transaction manager service. This is the object passed to clients of this service. It implements the TransactionManager and the Administrable interfaces.

Since:

1.1

Author:

Sun Microsystems, Inc.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface net.jini.core.transaction.server.TransactionManager

TransactionManager.Created

Field Summary

Fields

Modifier and Type	Field and Description
Uuid	proxyID The proxy's Uuid

Fields inherited from interface net.jini.core.transaction.server.TransactionConstants

ABORTED, ACTIVE, COMMITTED, NOTCHANGED, PREPARED, VOTING

Constructor Summary

Constructors

Constructor and Description
TxnMgrProxy()

Method Summary

Modifier and Type	Method and Description
void	abort(long id) Abort the transaction.
void	abort(long id, long waitFor) Abort the transaction, waiting for participants to be notified of the decision.
void	abort(Object xid)
void	abort(Object xid, long waitFor)
void	commit(long id) Commit the transaction.
void	commit(long id, long waitFor) Commit the transaction, waiting for participants to be notified of the decision.
void	commit(Object xid)
void	commit(Object xid, long waitFor)
TransactionManager.Created	create(long lease) Begin a new top-level transaction.
TransactionManager.Created	create(Object xid, long lease)
static TxnMgrProxy	create(TxnManager txnMgr, TxnManager direct, Uuid id)
TxnMgrProxy	createLightProxy()
boolean	disJoin(long id, TransactionParticipant part) Remove a participant that was joined for a first time. called when a call to a participant returned empty so we can spare calling commit or abort on it, usually used in embedded mahalo
boolean	equals(Object o) Proxies for servers with the same proxyID are considered equal.
Object	getAdmin() Returns an object that implements whatever administration interfaces are appropriate for the particular service.
MarshalPivot	getMarshalPivot()
TxnManager	getProxy()
Uuid	getReferentUuid() Returns the universally unique identifier that has been assigned to the resource this proxy represents.
int	getState(long id) Returns the current state of the given transaction.
int	getState(Object xid)
Uuid	getTransactionManagerId()
int	hashCode() Proxies for servers with the same proxyID have the same hash code.
boolean	isEmbeddedMgr()
void	join(long id, TransactionParticipant part, long crashCount) Join a transaction that is managed by this transaction manager.
void	join(long id, TransactionParticipant part, long crashCount, int partitionId, String clusterName)
void	join(long id, TransactionParticipant part, long crashCount, ServerTransaction userXtnObject) Deprecated.
void	join(long id, TransactionParticipant part, long crashCount, ServerTransaction userXtnObject, int partitionId, String clusterName, Object clusterProxy)
void	join(Object id, TransactionParticipant part, long crashCount)
void	join(Object id, TransactionParticipant part, long crashCount, int partitionId, String clusterName)
void	join(Object id, TransactionParticipant part, long crashCount, ServerTransaction userXtnObject) Deprecated.
void	join(Object id, TransactionParticipant part, long crashCount, ServerTransaction userXtnObject, int partitionId, String clusterName, Object clusterProxy)
boolean	needParticipantsJoin() returns true if this mgr which requires that the txn participants join into the txn in contrary to a mgr which the participants are known prior to txn propagation
int	prepare(Object xid) prepare the underlying xtn designated by the rendered xid
void	readExternal(ObjectInput in)
void	reenterPreparedExternalXid(Object xid, List<TransactionParticipant> parts) Retrieves a Transaction given the transaction's ID.
String	toString()
void	writeExternal(ObjectOutput out)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

proxyID

public Uuid proxyID

The proxy's Uuid

Constructor Detail

TxnMgrProxy

public TxnMgrProxy()

Method Detail

create

public static TxnMgrProxy create(TxnManager txnMgr,
                                 TxnManager direct,
                                 Uuid id)

createLightProxy

public TxnMgrProxy createLightProxy()

create

public TransactionManager.Created create(long lease)
                                  throws LeaseDeniedException,
                                         RemoteException

Description copied from interface: TransactionManager

Begin a new top-level transaction.

Specified by:

create in interface TransactionManager

Parameters:

lease - the requested lease time for the transaction

Returns:

the transaction ID and the lease granted

Throws:

LeaseDeniedException - if this manager is unwilling to grant the requested lease time

RemoteException - if there is a communication error

join

public void join(long id,
                 TransactionParticipant part,
                 long crashCount)
          throws UnknownTransactionException,
                 CannotJoinException,
                 CrashCountException,
                 RemoteException

Description copied from interface: TransactionManager

Join a transaction that is managed by this transaction manager. The crashCount marks the state of the storage used by the participant for transactions. If the participant attempts to join a transaction more than once, the crash counts must be the same. Each system crash or other event that destroys the state of the participant's unprepared transaction storage must cause the crash count to increase by at least one.

Specified by:

join in interface TransactionManager

Parameters:

id - the transaction ID

part - the participant joining the transaction

crashCount - the participant's current crash count

Throws:

UnknownTransactionException - if the transaction is unknown to the transaction manager, either because the transaction ID is incorrect or because the transaction is complete and its state has been discarded by the manager.

CannotJoinException - if the transaction is known to the manager but is no longer active.

CrashCountException - if the crash count provided for the participant differs from the crash count in a previous invocation of the same pairing of participant and transaction

RemoteException - if there is a communication error

See Also:

ServerTransaction.join(net.jini.core.transaction.server.TransactionParticipant, long)

disJoin

public boolean disJoin(long id,
                       TransactionParticipant part)
                throws UnknownTransactionException,
                       RemoteException

Description copied from interface: ExtendedTransactionManager

Remove a participant that was joined for a first time. called when a call to a participant returned empty so we can spare calling commit or abort on it, usually used in embedded mahalo

Specified by:

disJoin in interface ExtendedTransactionManager

Returns:

true if participant disjoined

Throws:

UnknownTransactionException

RemoteException

See Also:

TransactionParticipant

getState

public int getState(long id)
             throws UnknownTransactionException,
                    RemoteException

Description copied from interface: TransactionManager

Returns the current state of the given transaction. The returned state can be any of the TransactionConstants values.

Specified by:

getState in interface TransactionManager

Parameters:

id - the transaction ID

Returns:

an int representing the state of the transaction

Throws:

UnknownTransactionException - if the transaction is unknown to the transaction manager, either because the transaction ID is incorrect or because the transaction is complete and its state has been discarded by the manager.

RemoteException - if there is a communication error

See Also:

ServerTransaction.getState(), TransactionConstants

commit

public void commit(long id)
            throws UnknownTransactionException,
                   CannotCommitException,
                   RemoteException

Description copied from interface: TransactionManager

Commit the transaction. Commit asks the transaction manager to execute the voting process with the participants. Returns if the transaction successfully reaches either the NOTCHANGED or the COMMITTED state, without waiting for the transaction manager to notify all participants of the decision. If the transaction must be aborted (because one or more participants are unable to prepare), CannotCommitException is thrown without waiting for the transaction manager to notify all participants of the decision.

Specified by:

commit in interface TransactionManager

Parameters:

id - the transaction ID

Throws:

UnknownTransactionException - if the transaction is unknown to the transaction manager, either because the transaction ID is incorrect or because the transaction is complete and its state has been discarded by the manager.

CannotCommitException - if the transaction is being or already has been aborted

RemoteException - if there is a communication error

commit

public void commit(long id,
                   long waitFor)
            throws UnknownTransactionException,
                   CannotCommitException,
                   TimeoutExpiredException,
                   RemoteException

Description copied from interface: TransactionManager

Commit the transaction, waiting for participants to be notified of the decision. Commit asks the transaction manager to execute the voting process with the participants. Returns if the transaction successfully reaches either the NOTCHANGED or the COMMITTED state, and the transaction manager has notified all participants of the decision, before the specified timeout expires. If the transaction must be aborted (because one or more participants are unable to prepare), CannotCommitException is thrown if the transaction manager is able to notify all participants of the decision before the specified timeout expires. If the transaction manager reaches a decision, but is unable to notify all participants of that decision before the specified timeout expires, then TimeoutExpiredException is thrown. If the specified timeout expires before the transaction manager reaches a decision, TimeoutExpiredException is not thrown until the manager reaches a decision.

Specified by:

commit in interface TransactionManager

Parameters:

id - the transaction ID

waitFor - timeout to wait, from the start of the call until all participants have been notified of the transaction manager's decision

Throws:

UnknownTransactionException - if the transaction is unknown to the transaction manager, either because the transaction ID is incorrect or because the transaction is complete and its state has been discarded by the manager.

CannotCommitException - if the transaction is being or already has been aborted

TimeoutExpiredException - if the transaction manager reaches a decision, but is unable to notify all participants of that decision before the specified timeout expires

RemoteException - if there is a communication error

abort

public void abort(long id)
           throws UnknownTransactionException,
                  CannotAbortException,
                  RemoteException

Description copied from interface: TransactionManager

Abort the transaction. This can be called at any time by any object holding a reference to the transaction. Abort asks the transaction manager to abort the transaction and to notify each participant of the decision, resulting in them rolling back any state changes made as part of the transaction. Returns as soon as the transaction manager records the abort decision, without waiting for the transaction manager to notify all participants of the decision.

Specified by:

abort in interface TransactionManager

Parameters:

id - the transaction ID

Throws:

UnknownTransactionException - if the transaction is unknown to the transaction manager, either because the transaction ID is incorrect or because the transaction is complete and its state has been discarded by the manager.

CannotAbortException - if the transaction is known to have previously reached the COMMITTED state due to an earlier commit

RemoteException - if there is a communication error

abort

public void abort(long id,
                  long waitFor)
           throws UnknownTransactionException,
                  CannotAbortException,
                  TimeoutExpiredException,
                  RemoteException

Description copied from interface: TransactionManager

Abort the transaction, waiting for participants to be notified of the decision. This can be called at any time by any object holding a reference to the transaction. Abort asks the transaction manager to abort the transaction and to notify each participant of the decision, resulting in them rolling back any state changes made as part of the transaction. Returns if the transaction manager records the decision and is able to notify all participants of the decision before the specified timeout expires. If the transaction manager is unable to notify all participants of the decision before the specified timeout expires, then TimeoutExpiredException is thrown.

Specified by:

abort in interface TransactionManager

Parameters:

id - the transaction ID

waitFor - timeout to wait, from the start of the call until all participants have been notified of the transaction manager's decision

Throws:

UnknownTransactionException - if the transaction is unknown to the transaction manager, either because the transaction ID is incorrect or because the transaction is complete and its state has been discarded by the manager.

CannotAbortException - if the transaction is known to have previously reached the COMMITTED state due to an earlier commit

TimeoutExpiredException - if the timeout expires before all participants have been notified

RemoteException - if there is a communication error

prepare

public int prepare(Object xid)
            throws CannotCommitException,
                   UnknownTransactionException,
                   RemoteException

Description copied from interface: ExtendedTransactionManager

prepare the underlying xtn designated by the rendered xid

Specified by:

prepare in interface ExtendedTransactionManager

Returns:

Throws:

UnknownTransactionException

RemoteException

CannotCommitException

commit

public void commit(Object xid)
            throws UnknownTransactionException,
                   CannotCommitException,
                   RemoteException

Specified by:

commit in interface ExtendedTransactionManager

Throws:

UnknownTransactionException

CannotCommitException

RemoteException

commit

public void commit(Object xid,
                   long waitFor)
            throws UnknownTransactionException,
                   CannotCommitException,
                   TimeoutExpiredException,
                   RemoteException

Specified by:

commit in interface ExtendedTransactionManager

Throws:

UnknownTransactionException

CannotCommitException

TimeoutExpiredException

RemoteException

abort

public void abort(Object xid)
           throws UnknownTransactionException,
                  CannotAbortException,
                  RemoteException

Specified by:

abort in interface ExtendedTransactionManager

Throws:

UnknownTransactionException

CannotAbortException

RemoteException

abort

public void abort(Object xid,
                  long waitFor)
           throws UnknownTransactionException,
                  CannotAbortException,
                  TimeoutExpiredException,
                  RemoteException

Specified by:

abort in interface ExtendedTransactionManager

Throws:

UnknownTransactionException

CannotAbortException

TimeoutExpiredException

RemoteException

create

public TransactionManager.Created create(Object xid,
                                         long lease)
                                  throws LeaseDeniedException,
                                         RemoteException

Specified by:

create in interface ExtendedTransactionManager

Throws:

LeaseDeniedException

RemoteException

getState

public int getState(Object xid)
             throws UnknownTransactionException,
                    RemoteException

Specified by:

getState in interface ExtendedTransactionManager

Throws:

UnknownTransactionException

RemoteException

join

public void join(Object id,
                 TransactionParticipant part,
                 long crashCount)
          throws UnknownTransactionException,
                 CannotJoinException,
                 CrashCountException,
                 RemoteException

Specified by:

join in interface ExtendedTransactionManager

Throws:

UnknownTransactionException

CannotJoinException

CrashCountException

RemoteException

join

@Deprecated
public void join(long id,
                             TransactionParticipant part,
                             long crashCount,
                             ServerTransaction userXtnObject)
                      throws UnknownTransactionException,
                             CannotJoinException,
                             CrashCountException,
                             RemoteException

Deprecated.

Specified by:

join in interface ExtendedTransactionManager

Throws:

UnknownTransactionException

CannotJoinException

CrashCountException

RemoteException

join

@Deprecated
public void join(Object id,
                             TransactionParticipant part,
                             long crashCount,
                             ServerTransaction userXtnObject)
                      throws UnknownTransactionException,
                             CannotJoinException,
                             CrashCountException,
                             RemoteException

Deprecated.

Specified by:

join in interface ExtendedTransactionManager

Throws:

UnknownTransactionException

CannotJoinException

CrashCountException

RemoteException

join

public void join(long id,
                 TransactionParticipant part,
                 long crashCount,
                 int partitionId,
                 String clusterName)
          throws UnknownTransactionException,
                 CannotJoinException,
                 CrashCountException,
                 RemoteException

Specified by:

join in interface ExtendedTransactionManager

Throws:

UnknownTransactionException

CannotJoinException

CrashCountException

RemoteException

join

public void join(Object id,
                 TransactionParticipant part,
                 long crashCount,
                 int partitionId,
                 String clusterName)
          throws UnknownTransactionException,
                 CannotJoinException,
                 CrashCountException,
                 RemoteException

Specified by:

join in interface ExtendedTransactionManager

Throws:

UnknownTransactionException

CannotJoinException

CrashCountException

RemoteException

join

public void join(long id,
                 TransactionParticipant part,
                 long crashCount,
                 ServerTransaction userXtnObject,
                 int partitionId,
                 String clusterName,
                 Object clusterProxy)
          throws UnknownTransactionException,
                 CannotJoinException,
                 CrashCountException,
                 RemoteException

Specified by:

join in interface ExtendedTransactionManager

Throws:

UnknownTransactionException

CannotJoinException

CrashCountException

RemoteException

join

public void join(Object id,
                 TransactionParticipant part,
                 long crashCount,
                 ServerTransaction userXtnObject,
                 int partitionId,
                 String clusterName,
                 Object clusterProxy)
          throws UnknownTransactionException,
                 CannotJoinException,
                 CrashCountException,
                 RemoteException

Specified by:

join in interface ExtendedTransactionManager

Throws:

UnknownTransactionException

CannotJoinException

CrashCountException

RemoteException

reenterPreparedExternalXid

public void reenterPreparedExternalXid(Object xid,
                                       List<TransactionParticipant> parts)
                                throws RemoteException,
                                       CannotCommitException

Retrieves a Transaction given the transaction's ID.

Parameters:

id - the id

Throws:

RemoteException

CannotCommitException

getAdmin

public Object getAdmin()
                throws RemoteException

Description copied from interface: Administrable

Returns an object that implements whatever administration interfaces are appropriate for the particular service.

Specified by:

getAdmin in interface Administrable

Returns:

an object that implements whatever administration interfaces are appropriate for the particular service.

Throws:

RemoteException

See Also:

JoinAdmin

getReferentUuid

public Uuid getReferentUuid()

Returns the universally unique identifier that has been assigned to the resource this proxy represents.

Specified by:

getReferentUuid in interface ReferentUuid

Returns:

the instance of Uuid that is associated with the resource this proxy represents. This method will not return null.

See Also:

ReferentUuid

hashCode

public int hashCode()

Proxies for servers with the same proxyID have the same hash code.

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Proxies for servers with the same proxyID are considered equal.

Overrides:

equals in class Object

getProxy

public TxnManager getProxy()

needParticipantsJoin

public boolean needParticipantsJoin()

returns true if this mgr which requires that the txn participants join into the txn in contrary to a mgr which the participants are known prior to txn propagation

Specified by:

needParticipantsJoin in interface TransactionManager

Returns:

true if its a mgr which requires the txn participants to join

isEmbeddedMgr

public boolean isEmbeddedMgr()

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException

getMarshalPivot

public MarshalPivot getMarshalPivot()
                             throws RemoteException

Specified by:

getMarshalPivot in interface MarshalPivotProvider

Throws:

RemoteException

toString

public String toString()

Overrides:

toString in class Object

getTransactionManagerId

public Uuid getTransactionManagerId()
                             throws RemoteException

Specified by:

getTransactionManagerId in interface TransactionManager

Throws:

RemoteException