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annotate src/org/dancres/blitz/remote/ProxyFactory.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
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1 package org.dancres.blitz.remote;
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2
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3 import net.jini.id.Uuid;
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4
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5 import net.jini.core.constraint.RemoteMethodControl;
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6
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7 import org.dancres.blitz.lease.SpaceUID;
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8
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9 /**
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10 This class instantiates appropriate proxy instances of the given types
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11 based on whether we are running in secure mode or not (secure mode is
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12 defined to be active when our exported stub reference supports
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13 RemoteMethodControl which will be the result of config file containing
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14 an appropriate Exporter setup).
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15 */
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16 public class ProxyFactory {
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17 private static boolean isSecure(BlitzServer aStub) {
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18 return (aStub instanceof RemoteMethodControl);
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19 }
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20
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21 public static BlitzProxy newBlitzProxy(BlitzServer aStub, Uuid aUuid) {
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22 if (isSecure(aStub))
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23 return new ConstrainableBlitzProxy(aStub, aUuid);
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24 else
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25 return new BlitzProxy(aStub, aUuid);
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26 }
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27
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28 static AdminProxy newAdminProxy(BlitzServer aStub, Uuid aUuid) {
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29 if (isSecure(aStub))
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30 return new ConstrainableAdminProxy(aStub, aUuid);
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31 else
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32 return new AdminProxy(aStub, aUuid);
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33 }
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34
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35 static TxnParticipantProxy newTxnParticipantProxy(BlitzServer aStub,
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36 Uuid aUuid) {
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37 if (isSecure(aStub))
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38 return new ConstrainableTxnParticipantProxy(aStub, aUuid);
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39 else
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40 return new TxnParticipantProxy(aStub, aUuid);
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41 }
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42
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43 public static LeaseImpl newLeaseImpl(BlitzServer aStub, Uuid aUuid,
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44 SpaceUID aUID, long anExpiration) {
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45 if (isSecure(aStub))
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46 return new ConstrainableLeaseImpl(aStub, aUuid, aUID,
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47 anExpiration);
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48 else
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49 return new LeaseImpl(aStub, aUuid, aUID, anExpiration);
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50 }
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51
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52 /**
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53 * @return a lease with no stub set. This will be done by the <code>
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54 * BlitzProxy</code> on receipt. This saves the transfer of a stub which
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55 * is a significant serialization cost.
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56 */
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57 public static LeaseImpl newEntryLeaseImpl(BlitzServer aStub,
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58 Uuid aUuid, SpaceUID aUID, long anExpiration) {
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59 if (isSecure(aStub))
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60 return new ConstrainableLeaseImpl(null, null, aUID,
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61 anExpiration);
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62 else
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63 return new LeaseImpl(null, null, aUID, anExpiration);
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64 }
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65 }