Mercurial > hg > blitz_condensed
annotate src/org/dancres/blitz/lease/LeaseHandlers.java @ 33:0b9265358617
Added tag 2.1.1 for changeset a77f0a9ed93c
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 12 Jun 2010 10:52:10 +0100 |
parents | 3dc0c5604566 |
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0
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1 package org.dancres.blitz.lease; |
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2 |
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3 import java.io.IOException; |
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4 import java.io.InputStream; |
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5 import java.io.InputStreamReader; |
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6 |
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7 import java.util.logging.*; |
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8 |
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9 import net.jini.core.lease.UnknownLeaseException; |
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10 import net.jini.core.lease.LeaseDeniedException; |
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11 import net.jini.core.lease.Lease; |
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12 |
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13 import net.jini.config.ConfigurationException; |
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14 import net.jini.config.ConfigurationFile; |
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15 import net.jini.config.Configuration; |
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16 |
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17 import org.dancres.blitz.Logging; |
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18 |
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19 import org.dancres.blitz.config.ConfigurationFactory; |
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20 |
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21 import org.dancres.blitz.util.Time; |
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22 |
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23 /** |
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24 The access point for managing leases associated with SpaceUIDs. Lease |
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25 management is achieved through a collection of LeaseHandlers loaded from |
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26 <code>handlers.properties</code>. Each LeaseHandler "knows" about one |
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27 (or possibly more) types of SpaceUID and handles renewal or cancelling of |
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28 the lease associated with the SpaceUID. |
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29 |
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30 @see org.dancres.blitz.lease.LeaseHandler |
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31 */ |
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32 public class LeaseHandlers { |
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33 private static final String MODULE_NAME = |
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34 ConfigurationFactory.BLITZ_MODULE; |
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35 |
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36 private static final String HANDLER_PROPERTY = "handlers"; |
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37 |
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38 private static LeaseHandler[] theHandlers; |
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39 |
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40 private static Logger theLogger = |
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41 Logging.newLogger("org.dancres.blitz.lease.LeaseHandlers"); |
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42 |
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43 static { |
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44 try { |
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45 InputStream myStream = |
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46 LeaseHandlers.class.getResourceAsStream("handlers.properties"); |
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47 |
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48 if (myStream == null) |
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49 throw new IOException(); |
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50 else { |
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51 Configuration myConfig = |
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52 new ConfigurationFile(new InputStreamReader(myStream), |
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53 null); |
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54 |
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55 LeaseHandler[] myFilters = |
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56 (LeaseHandler[]) myConfig.getEntry(MODULE_NAME, |
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57 HANDLER_PROPERTY, |
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58 LeaseHandler[].class); |
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59 |
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60 theHandlers = myFilters; |
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61 } |
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62 |
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63 } catch (Exception anE) { |
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64 theLogger.log(Level.SEVERE, "Failed to load lease handlers", anE); |
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65 } |
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66 } |
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67 |
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68 public static long renew(SpaceUID aUID, long aLeaseDuration) |
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69 throws UnknownLeaseException, LeaseDeniedException, IOException { |
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70 |
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71 for (int i = 0; i < theHandlers.length; i++) { |
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72 if (theHandlers[i].recognizes(aUID)) { |
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73 return theHandlers[i].renew(aUID, aLeaseDuration); |
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74 } |
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75 } |
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76 |
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77 throw new UnknownLeaseException(); |
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78 } |
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79 |
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80 public static void cancel(SpaceUID aUID) |
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81 throws UnknownLeaseException, IOException { |
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82 |
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83 for (int i = 0; i < theHandlers.length; i++) { |
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84 if (theHandlers[i].recognizes(aUID)) { |
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85 theHandlers[i].cancel(aUID); |
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86 return; |
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87 } |
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88 } |
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89 |
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90 throw new UnknownLeaseException(); |
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91 } |
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92 } |