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/*
* ====================================================================
* Project: openMDX, http://www.openmdx.org/
* Description: X/Open Transaction Identifier
* Owner: OMEX AG, Switzerland, http://www.omex.ch
* ====================================================================
*
* This software is published under the BSD license as listed below.
*
* Copyright (c) 2004-2009, OMEX AG, Switzerland
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of the openMDX team nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* ------------------
*
* This product includes or is based on software developed by other
* organizations as listed in the NOTICE file.
*/
package org.openmdx.kernel.lightweight.transaction;
import java.util.Arrays;
import javax.transaction.xa.Xid;
import org.openmdx.kernel.text.format.HexadecimalFormatter;
/**
* X/Open Transaction Identifier
*/
class TransactionId implements Xid {
/**
* Constructor
*/
protected TransactionId(
long globalTransactionIdMostSignificantBits,
long globalTransactionIdLeastSignificantBits
){
this.mostSigBits = globalTransactionIdMostSignificantBits;
this.leastSigBits = globalTransactionIdLeastSignificantBits;
}
/**
* Constructor
*/
protected TransactionId(){
// Deserialization
}
/**
* @serial The most significant 64 bits of this TransactionIdentifier.
*/
protected long mostSigBits;
/**
* @serial The least significant 64 bits of this TransactionIdentifier.
*/
protected long leastSigBits;
//------------------------------------------------------------------------
// Extends Object
//------------------------------------------------------------------------
/**
* Generic Xid Comparison
*/
static boolean equal(
Xid left,
Xid right
){
return
left.getFormatId() == right.getFormatId() &&
Arrays.equals(left.getGlobalTransactionId(), right.getGlobalTransactionId()) &&
Arrays.equals(left.getBranchQualifier(), right.getBranchQualifier());
}
/* (non-Javadoc)
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
if(!(obj instanceof Xid)) return false;
if(!(obj.getClass() == TransactionId.class)) return equal(this, (Xid) obj);
TransactionId that = (TransactionId) obj;
return
this.mostSigBits == that.mostSigBits &&
this.leastSigBits == that.leastSigBits;
}
/* (non-Javadoc)
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
long value = this.mostSigBits ^ this.leastSigBits;
value ^= value >> 32;
return (int)value;
}
/**
* Simplify toString subclassing
*
* @return a string builder containing the Xid's String representation
*/
protected StringBuilder toStringBuilder(
){
return new StringBuilder(
"Xid:"
).append(
new HexadecimalFormatter(getFormatId(),4)
).append(
'-'
).append(
new HexadecimalFormatter(this.mostSigBits)
).append(
new HexadecimalFormatter(this.leastSigBits)
);
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return toStringBuilder().toString();
}
//------------------------------------------------------------------------
// Implements Xid
//------------------------------------------------------------------------
/**
* The Lightweight Containers Transaction Identifier Id.
*/
private static final int FORMAT_ID = 0x4c43; // i.e. LC
/**
* The empty branch identifier
*/
private static final byte[] BRANCH_ID = new byte[]{};
/* (non-Javadoc)
* @see javax.transaction.xa.Xid#getFormatId()
*/
public final int getFormatId() {
return FORMAT_ID;
}
/* (non-Javadoc)
* @see javax.transaction.xa.Xid#getGlobalTransactionId()
*/
public final byte[] getGlobalTransactionId() {
return new byte[]{
(byte)(mostSigBits >> 56),
(byte)(mostSigBits >> 48),
(byte)(mostSigBits >> 40),
(byte)(mostSigBits >> 32),
(byte)(mostSigBits >> 24),
(byte)(mostSigBits >> 16),
(byte)(mostSigBits >> 8),
(byte)(mostSigBits ),
(byte)(leastSigBits >> 56),
(byte)(leastSigBits >> 48),
(byte)(leastSigBits >> 40),
(byte)(leastSigBits >> 32),
(byte)(leastSigBits >> 24),
(byte)(leastSigBits >> 16),
(byte)(leastSigBits >> 8),
(byte)(leastSigBits )
};
}
/* (non-Javadoc)
* @see javax.transaction.xa.Xid#getBranchQualifier()
*/
public byte[] getBranchQualifier() {
return BRANCH_ID;
}
}
