Mercurial > hg > blitz_stable

annotate src/org/dancres/blitz/remote/LeaseMapImpl.java @ 35:6f68e94c1fb8 default tip

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Add CondensedStats monitoring utility, equivalent to vmstat
author Dominic Cleal <dominic-cleal@cdo2.com>
date Thu, 05 Aug 2010 11:07:25 +0100
parents 3dc0c5604566
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
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1 package org.dancres.blitz.remote;
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2
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3 import java.rmi.RemoteException;
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4
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5 import java.util.Iterator;
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6 import java.util.HashMap;
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7
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8 import net.jini.core.lease.LeaseMapException;
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9 import net.jini.core.lease.Lease;
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10
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11 import com.sun.jini.lease.AbstractLeaseMap;
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12
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13 import org.dancres.blitz.lease.SpaceUID;
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14
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15 /**
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16 @todo Check constraints are compatible
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17 */
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18 class LeaseMapImpl extends AbstractLeaseMap {
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19 private Landlord theLandlord;
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20
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21 LeaseMapImpl(Lease aLease, long aDuration, Landlord aLandlord) {
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22 super(aLease, aDuration);
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23 theLandlord = aLandlord;
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24 }
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25
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26 public boolean canContainKey(Object aKey) {
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27 if (aKey instanceof LeaseImpl) {
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28 LeaseImpl myOther = (LeaseImpl) aKey;
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29
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30 return (myOther.theStub.equals(theLandlord));
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31 }
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32
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33 return false;
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34 }
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35
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36 public void cancelAll() throws LeaseMapException, RemoteException {
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37 LeaseImpl[] myLeases = new LeaseImpl[size()];
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38 SpaceUID[] myUIDs = new SpaceUID[myLeases.length];
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39
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40 Iterator mySet = keySet().iterator();
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41
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42 for (int i = 0; mySet.hasNext(); i++) {
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43 LeaseImpl myLease = (LeaseImpl) mySet.next();
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44
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45 myLeases[i] = myLease;
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46 myUIDs[i] = myLease.getUID();
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47 }
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48
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49 LeaseResults myResults = theLandlord.cancel(myUIDs);
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50
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51 if (myResults == null)
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52 return;
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53
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54 HashMap myFails = new HashMap();
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55
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56 for (int i = 0; i < myResults.theFailures.length; i++) {
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57 if (myResults.theFailures[i] != null) {
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58 myFails.put(myLeases[i], myResults.theFailures[i]);
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59 }
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60 }
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61
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62 throw new LeaseMapException("Some leases didn't cancel", myFails);
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63 }
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64
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65 public void renewAll() throws LeaseMapException, RemoteException {
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66 LeaseImpl[] myLeases = new LeaseImpl[size()];
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67 SpaceUID[] myUIDs = new SpaceUID[myLeases.length];
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68 long[] myDurations = new long[myLeases.length];
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69
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70 Iterator mySet = keySet().iterator();
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71
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72 for (int i = 0; mySet.hasNext(); i++) {
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73 LeaseImpl myLease = (LeaseImpl) mySet.next();
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74
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75 myLeases[i] = myLease;
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76 myUIDs[i] = myLease.getUID();
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77 myDurations[i] = ((Long) get(myLease)).longValue();
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78 }
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79
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80 LeaseResults myResults = theLandlord.renew(myUIDs, myDurations);
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81
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82 long myNow = System.currentTimeMillis();
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83
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84 HashMap myFailed = null;
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85
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86 for (int i = 0; i < myResults.theNewDurations.length; i++) {
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87 long myDuration = myResults.theNewDurations[i];
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88 if (myDuration == -1) {
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89 if (myFailed == null)
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90 myFailed = new HashMap();
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91
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92 myFailed.put(myLeases[i], myResults.theFailures[i]);
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93
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94 // Get this lease out of the map - it's "broken"
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95 remove(myLeases[i]);
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96 } else {
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97 myDuration = myDuration + myNow;
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98 if (myDuration < 0)
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99 myDuration = Long.MAX_VALUE;
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100
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101 myLeases[i].setExpiration(myDuration);
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102 }
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103 }
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104
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105 if (myFailed != null)
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106 throw new LeaseMapException("Renewing", myFailed);
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107 }
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108 }