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annotate src/org/dancres/blitz/WriteEscortImpl.java @ 0:3dc0c5604566

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Initial checkin of blitz 2.0 fcs - no installer yet.
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 21 Mar 2009 11:00:06 +0000
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3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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1 package org.dancres.blitz;
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2
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Dan Creswell <dan.creswell@gmail.com>
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3 import net.jini.core.transaction.TransactionException;
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5 import org.dancres.blitz.mangler.MangledEntry;
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7 import org.dancres.blitz.entry.WriteEscort;
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Dan Creswell <dan.creswell@gmail.com>
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8 import org.dancres.blitz.entry.OpInfo;
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10 import org.dancres.blitz.txn.TxnState;
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12 import org.dancres.blitz.txnlock.*;
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14 class WriteEscortImpl implements WriteEscort {
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15 private TxnState theTxnState;
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16 private OpInfo theInfo;
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17
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18 private TransactionException theException;
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20 WriteEscortImpl(TxnState aTxnState) {
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21 theTxnState = aTxnState;
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22 }
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24 public boolean writing(OpInfo anInfo) {
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25 LockMgr myMgr = TxnLocks.getLockMgr(anInfo.getType());
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26 TxnLock myLock = myMgr.newLock(anInfo.getOID());
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28 synchronized(myLock) {
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29 myLock.acquire(theTxnState, TxnLock.WRITE, null, null, false);
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3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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31 // System.out.println(theTxnState.getId() + " Wr: " + myLock);
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32 }
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33
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34 try {
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35 theTxnState.add(new EntryTxnOp(TxnLock.WRITE, anInfo, myLock));
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36 } catch (TransactionException aTE) {
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37 myLock.release(theTxnState, TxnLock.WRITE);
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38 theException = aTE;
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39 return false;
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40 }
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41
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42 theInfo = anInfo;
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43
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44 return true;
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45 }
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46
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47 OpInfo getInfo() throws TransactionException {
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48 if (theException != null)
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49 throw theException;
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Dan Creswell <dan.creswell@gmail.com>
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50 else
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51 return theInfo;
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52 }
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53 }