org.mariadb.jdbc

Class MariaXaResource

java.lang.Object

org.mariadb.jdbc.MariaXaResource

All Implemented Interfaces:

XAResource

public class MariaXaResource
extends Object
implements XAResource

Field Summary

Fields inherited from interface javax.transaction.xa.XAResource

TMENDRSCAN, TMFAIL, TMJOIN, TMNOFLAGS, TMONEPHASE, TMRESUME, TMSTARTRSCAN, TMSUCCESS, TMSUSPEND, XA_OK, XA_RDONLY

Constructor Summary

Constructors

Constructor and Description
MariaXaResource(MariaDbConnection connection)

Method Summary

Modifier and Type	Method and Description
void	commit(Xid xid, boolean onePhase) Commits the global transaction specified by xid.
void	end(Xid xid, int flags) Ends the work performed on behalf of a transaction branch.
void	forget(Xid xid) Tells the resource manager to forget about a heuristically completed transaction branch.
int	getTransactionTimeout() Obtains the current transaction timeout value set for this XAResource instance.
boolean	isSameRM(XAResource xaResource) This method is called to determine if the resource manager instance represented by the target object is the same as the resource manager instance represented by the parameter xares.
int	prepare(Xid xid) Ask the resource manager to prepare for a transaction commit of the transaction specified in xid.
Xid[]	recover(int flags) Obtains a list of prepared transaction branches from a resource manager.
void	rollback(Xid xid) Informs the resource manager to roll back work done on behalf of a transaction branch.
boolean	setTransactionTimeout(int timeout) Sets the current transaction timeout value for this XAResource instance.
void	start(Xid xid, int flags) Starts work on behalf of a transaction branch specified in xid.
protected static String	xidToString(Xid xid)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MariaXaResource

public MariaXaResource(MariaDbConnection connection)

Method Detail

xidToString

protected static String xidToString(Xid xid)

commit

public void commit(Xid xid,
                   boolean onePhase)
            throws XAException

Commits the global transaction specified by xid.

Specified by:

commit in interface XAResource

Parameters:

xid - A global transaction identifier

onePhase - If true, the resource manager should use a one-phase commit protocol to commit the work done on behalf of xid.

Throws:

XAException - exception

end

public void end(Xid xid,
                int flags)
         throws XAException

Ends the work performed on behalf of a transaction branch. The resource manager disassociates the XA resource from the transaction branch specified and lets the transaction complete.

If TMSUSPEND is specified in the flags, the transaction branch is temporarily suspended in an incomplete state. The transaction context is in a suspended state and must be resumed via the start method with TMRESUME specified.

If TMFAIL is specified, the portion of work has failed. The resource manager may mark the transaction as rollback-only

If TMSUCCESS is specified, the portion of work has completed successfully.

Specified by:

end in interface XAResource

Parameters:

xid - A global transaction identifier that is the same as the identifier used previously in the start method.

flags - One of TMSUCCESS, TMFAIL, or TMSUSPEND.

Throws:

XAException - An error has occurred. (XAException values are XAER_RMERR, XAER_RMFAILED, XAER_NOTA, XAER_INVAL, XAER_PROTO, or XA_RB*)

forget

public void forget(Xid xid)

Tells the resource manager to forget about a heuristically completed transaction branch.

Specified by:

forget in interface XAResource

Parameters:

xid - A global transaction identifier.

getTransactionTimeout

public int getTransactionTimeout()

Obtains the current transaction timeout value set for this XAResource instance. If XAResource.setTransactionTimeout was not used prior to invoking this method, the return value is the default timeout set for the resource manager; otherwise, the value used in the previous setTransactionTimeout call is returned.

Specified by:

getTransactionTimeout in interface XAResource

Returns:

the transaction timeout value in seconds.

isSameRM

public boolean isSameRM(XAResource xaResource)

This method is called to determine if the resource manager instance represented by the target object is the same as the resource manager instance represented by the parameter xares.

Specified by:

isSameRM in interface XAResource

Parameters:

xaResource - An XAResource object whose resource manager instance is to be compared with the target object.

Returns:

true if it's the same RM instance; otherwise false.

prepare

public int prepare(Xid xid)
            throws XAException

Ask the resource manager to prepare for a transaction commit of the transaction specified in xid.

Specified by:

prepare in interface XAResource

Parameters:

xid - A global transaction identifier.

Returns:

A value indicating the resource manager's vote on the outcome of the transaction.

Throws:

XAException - An error has occurred. Possible exception values are: XA_RB*, XAER_RMERR, XAER_RMFAIL, XAER_NOTA, XAER_INVAL, XAER_PROTO.

recover

public Xid[] recover(int flags)
              throws XAException

Obtains a list of prepared transaction branches from a resource manager. The transaction manager calls this method during recovery to obtain the list of transaction branches that are currently in prepared or heuristically completed states.

Specified by:

recover in interface XAResource

Parameters:

flags - One of TMSTARTRSCAN, TMENDRSCAN, TMNOFLAGS. TMNOFLAGS must be used when no other flags are set in the parameter.

Returns:

The resource manager returns zero or more XIDs of the transaction branches.

Throws:

XAException - An error has occurred. Possible values are XAER_RMERR, XAER_RMFAIL, XAER_INVAL, and XAER_PROTO.

rollback

public void rollback(Xid xid)
              throws XAException

Informs the resource manager to roll back work done on behalf of a transaction branch.

Specified by:

rollback in interface XAResource

Parameters:

xid - A global transaction identifier.

Throws:

XAException - An error has occurred.

setTransactionTimeout

public boolean setTransactionTimeout(int timeout)

Sets the current transaction timeout value for this XAResource instance. Once set, this timeout value is effective until setTransactionTimeout is invoked again with a different value. To reset the timeout value to the default value used by the resource manager, set the value to zero. If the timeout operation is performed successfully, the method returns true; otherwise false. If a resource manager does not support explicitly setting the transaction timeout value, this method returns false.

Specified by:

setTransactionTimeout in interface XAResource

Parameters:

timeout - The transaction timeout value in seconds.

Returns:

true if the transaction timeout value is set successfully; otherwise false.

start

public void start(Xid xid,
                  int flags)
           throws XAException

Starts work on behalf of a transaction branch specified in xid. If TMJOIN is specified, the start applies to joining a transaction previously seen by the resource manager. If TMRESUME is specified, the start applies to resuming a suspended transaction specified in the parameter xid. If neither TMJOIN nor TMRESUME is specified and the transaction specified by xid has previously been seen by the resource manager, the resource manager throws the XAException exception with XAER_DUPID error code.

Specified by:

start in interface XAResource

Parameters:

xid - A global transaction identifier to be associated with the resource.

flags - One of TMNOFLAGS, TMJOIN, or TMRESUME.

Throws:

XAException - An error has occurred.