Mercurial > hg > blitz_stable

annotate src/org/dancres/blitz/notify/TxnNotifys.java @ 32:243c74d599bf

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author Dan Creswell <dan.creswell@gmail.com>
date Sat, 12 Jun 2010 10:41:47 +0100
parents 3dc0c5604566
children
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1 package org.dancres.blitz.notify;
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2
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3 import java.io.IOException;
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4
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5 import java.util.HashMap;
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6 import java.util.ArrayList;
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7 import java.util.LinkedList;
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8 import java.util.Iterator;
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9 import java.util.logging.Level;
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10
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11 import org.dancres.blitz.txn.TxnState;
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12
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13 import org.dancres.blitz.oid.OID;
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14
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15 /**
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16 Tracks notify registrations associated with specific transactions.
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17 This is done so that when we receive a transaction ended event we can
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18 cleanup any outstanding templates associated with that transaction.
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20 @deprecated Transactional de-reg is handled by the generator when receiving
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21 end of transaction message.
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22 */
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23 class TxnNotifys {
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24 private HashMap theRegsByTxn = new HashMap();
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26 synchronized void track(OID aOID, TxnState aTxn) {
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27 // System.out.println("Tracking: " + aOID + ", " + aTxn.getId());
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29 LinkedList myRegs = getRegs(aTxn);
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30
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31 if (myRegs == null) {
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32 myRegs = new LinkedList();
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33 theRegsByTxn.put(aTxn.getId(), myRegs);
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34 }
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35
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36 myRegs.add(aOID);
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37 }
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38
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39 /**
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40 Return an Iterator of OID's
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41 */
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42 void unRegAll(TxnState aTxn) {
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43 Iterator myEventGenOIDs = null;
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44
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45 synchronized(this) {
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46 LinkedList myRegs = (LinkedList) theRegsByTxn.remove(aTxn.getId());
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47
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48 if (myRegs != null)
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49 myEventGenOIDs = myRegs.iterator();
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50 }
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51
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52 if (myEventGenOIDs != null) {
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53 while (myEventGenOIDs.hasNext()) {
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54 OID myOID = (OID) myEventGenOIDs.next();
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55
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56 try {
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57 EventGeneratorFactory.get().cancel(myOID);
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58 } catch (IOException aDbe) {
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59 }
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60 }
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61 }
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62 }
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64 private LinkedList getRegs(TxnState aTxn) {
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65 return (LinkedList) theRegsByTxn.get(aTxn.getId());
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66 }
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67 }