User: osh
Date: 01/02/09 11:34:36
Added: src/main/org/jboss/tm GlobalId.java
Log:
Serializable class for transaction propagation context
with the current intra-VM DTM.
Revision Changes Path
1.1 jboss/src/main/org/jboss/tm/GlobalId.java
Index: GlobalId.java
===================================================================
/*
* JBoss, the OpenSource EJB server
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package org.jboss.tm;
import javax.transaction.xa.Xid;
/**
* This object encapsulates the global transaction ID of a transaction.
* It is similar to an Xid, but holds only the GlobalId part.
* This implementation is immutable and always serializable at runtime.
*
* @see XidImpl
* @author <a href="mailto:[EMAIL PROTECTED]">Ole Husgaard</a>
* @version $Revision: 1.1 $
*/
class GlobalId
implements java.io.Serializable
{
// Constants -----------------------------------------------------
// Attributes ----------------------------------------------------
/**
* Hash code of this instance. This is really a sequence number.
*/
private int hash;
/**
* Global transaction id of this instance.
* The coding of this class depends on the fact that this variable is
* initialized in the constructor and never modified. References to
* this array are never given away, instead a clone is delivered.
*/
private byte[] globalId;
// Static --------------------------------------------------------
// Constructors --------------------------------------------------
/**
* Create a new instance.
*/
GlobalId(Xid xid)
{
if (xid.getFormatId() != XidImpl.JBOSS_FORMAT_ID)
throw new IllegalArgumentException("Bad transaction format id");
hash = xid.hashCode();
if (xid instanceof XidImpl)
globalId = ((XidImpl)xid).getInternalGlobalTransactionId();
else
globalId = xid.getGlobalTransactionId();
}
// Public --------------------------------------------------------
// Xid implementation --------------------------------------------
/**
* Compare for equality.
*
* Instances are considered equal if they both refer to the same
* global transaction id.
*/
public boolean equals(Object obj)
{
if (obj instanceof GlobalId) {
GlobalId other = (GlobalId)obj;
if (hash != other.hash)
return false;
if (globalId == other.globalId)
return true;
if (globalId.length != other.globalId.length)
return false;
for (int i = 0; i < globalId.length; ++i)
if (globalId[i] != other.globalId[i])
return false;
return true;
}
return false;
}
public int hashCode()
{
return hash;
}
// Package protected ---------------------------------------------
// Protected -----------------------------------------------------
// Private -------------------------------------------------------
// Inner classes -------------------------------------------------
}
