oracle.jdbc.xa

Class OracleXid

java.lang.Object

oracle.jdbc.xa.OracleXid

All Implemented Interfaces:

Serializable, Xid

public class OracleXid
extends Object
implements Xid, Serializable

The OracleXid class:

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAXBQUALSIZE
static int	MAXGTRIDSIZE

Constructor Summary

Constructors

Constructor and Description
OracleXid(int fId, byte[] gId, byte[] bId) OracleXid() -- The constructor that constructs an OracleXid with given formatId, global transacrion Id and branch qualifier.
OracleXid(int fId, byte[] gId, byte[] bId, byte[] context) OracleXid() -- The constructor that constructs an OracleXid with given formatId, global transacrion Id and branch qualifier, and transaction context.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object xid)
byte[]	getBranchQualifier() getBranchQualifier() -- Obtain the txn branch qualifier of the XID
protected oracle.jdbc.internal.OracleConnection	getConnectionDuringExceptionHandling() Compares the given transaction identifiers with this.
int	getFormatId() getFormatId() -- Obtain the format identifier part of the Xid.
byte[]	getGlobalTransactionId() getGlobalTransactionId() -- Obtain the global txn id of the XID
int	hashCode()
static boolean	isLocalTransaction(Xid xid)

Methods inherited from class java.lang.Object

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

Field Detail

MAXGTRIDSIZE

public static final int MAXGTRIDSIZE

See Also:

Constant Field Values

MAXBQUALSIZE

public static final int MAXBQUALSIZE

See Also:

Constant Field Values

Constructor Detail

OracleXid

public OracleXid(int fId,
                 byte[] gId,
                 byte[] bId)
          throws XAException

OracleXid() -- The constructor that constructs an OracleXid with given formatId, global transacrion Id and branch qualifier.

Parameters:

fId - format ID

gId - global transaction ID (no copy performed)

bId - branch Qualifier (no copy performed)

Throws:

XAException - if the size of gId or bId is more than 64 bytes

OracleXid

public OracleXid(int fId,
                 byte[] gId,
                 byte[] bId,
                 byte[] context)
          throws XAException

OracleXid() -- The constructor that constructs an OracleXid with given formatId, global transacrion Id and branch qualifier, and transaction context.

Parameters:

fId - format ID

gId - global transaction ID (no copy performed)

bId - branch Qualifier (no copy performed)

context - transation context (no copy performed)

Throws:

XAException - if the size of gId or bId is more than 64 bytes

Method Detail

getFormatId

public int getFormatId()

getFormatId() -- Obtain the format identifier part of the Xid.

Specified by:

getFormatId in interface Xid

Returns:

Format identifier. 0 means the OSI CCR format.

getGlobalTransactionId

public byte[] getGlobalTransactionId()

getGlobalTransactionId() -- Obtain the global txn id of the XID

Specified by:

getGlobalTransactionId in interface Xid

Returns:

A byte array containing the global transaction identifier.

getBranchQualifier

public byte[] getBranchQualifier()

getBranchQualifier() -- Obtain the txn branch qualifier of the XID

Specified by:

getBranchQualifier in interface Xid

Returns:

A byte array containing the branch qualifier of the transaction.

isLocalTransaction

public static final boolean isLocalTransaction(Xid xid)

equals

public boolean equals(Object xid)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getConnectionDuringExceptionHandling

protected oracle.jdbc.internal.OracleConnection getConnectionDuringExceptionHandling()

Compares the given transaction identifiers with this. If the format is different or any byte in the global transaction if or the branch qualifier differs from this, then false is returned. public boolean equals(Object obj) { if(obj==this) return true; OracleXid xid =null; try { xid = (OracleXid)obj; } catch(ClassCastException e){ return false; } if(formatId != xid.getFormatId()) return false; byte[] gtridB = xid.getGlobalTransactionId(); byte[] bqualB = xid.getBranchQualifier(); if(gtrid != gtridB){ if( (gtrid == null && gtridB != null) || (gtridB == null && gtrid != null) ) return false; if(gtridB!=null){ if(gtridB.length != gtrid.length) return false; for(int i=0;i<gtrid.length;i++){ if(gtridB[i] != gtrid[i]) return false; } } } if(bqual != bqualB){ if( ( bqualB == null && bqual != null) || (bqual == null && bqualB != null) ) return false; if(bqualB!=null){ if(bqualB.length != bqual.length) return false; for(int i=0;i<bqualB.length;i++){ if(bqualB[i] != bqual[i]) return false; } } } return true; } public int hashCode() { int ret = formatId; int temp = 0; for(int i=0;i<gtrid.length/4;i++){ temp = (int)gtrid[i] + ((int)(gtrid[i+1]<<8))&0xff00 + ((int)(gtrid[i+2]<<16))&0xff0000 + ((int)(gtrid[i+3]<<24))&0xff000000; ret += temp; } for(int i=0;i<bqual.length/4;i++){ temp = (int)bqual[i] + ((int)(bqual[i+1]<<8))&0xff00 + ((int)(bqual[i+2]<<16))&0xff0000 + ((int)(bqual[i+3]<<24))&0xff000000; ret += temp; } return ret; }