Mercurial > hg > blitz_condensed
annotate src/org/dancres/blitz/util/Time.java @ 0:3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 21 Mar 2009 11:00:06 +0000 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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1 package org.dancres.blitz.util; |
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2 |
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3 import net.jini.core.lease.Lease; |
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4 import net.jini.core.lease.LeaseDeniedException; |
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5 |
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6 /** |
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7 Various methods/classes must cope with the JINI time model. This class |
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8 provides useful methods for dealing with that model. |
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9 */ |
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10 public class Time { |
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11 /** |
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12 Computes an expiry time based on the passed in wait time which might |
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13 be a suitable value or it might be Lease.FOREVER |
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14 */ |
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15 public static long getAbsoluteTime(long aWaitTime) { |
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16 if (aWaitTime == Lease.FOREVER) |
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17 return Long.MAX_VALUE; |
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18 |
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19 long myTime = System.currentTimeMillis() + aWaitTime; |
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20 |
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21 if (myTime < 0) |
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22 return Long.MAX_VALUE; |
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23 else |
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24 return myTime; |
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25 } |
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26 |
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27 /** |
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28 Compute the actual time to relative wait time based on the passed |
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29 argument. This will typically used by read/take variants. |
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30 */ |
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31 public static long getWaitTime(long aWaitTime) { |
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32 if (aWaitTime == Lease.FOREVER) |
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33 return Long.MAX_VALUE; |
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34 else |
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35 return aWaitTime; |
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36 } |
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37 |
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38 /** |
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39 Computes a lease duration given a lease duration which |
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40 could be a legitimate duration, Lease.FOREVER or Lease.ANY |
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41 |
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42 @param aTime the desired lease length |
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43 @param aBound the maximum lease length allowed. If aBound is zero, |
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44 then the max time is assumed to be Lease.FOREVER |
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Dan Creswell <dan.creswell@gmail.com>
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45 */ |
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46 public static long getLeaseDuration(long aTime, long aBound) { |
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47 |
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48 long myBound; |
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49 long myDuration = aTime; |
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50 |
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51 // Convert the bound to something sane |
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52 if (aBound == 0) |
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53 myBound = Lease.FOREVER; |
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54 else |
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55 myBound = aBound; |
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56 |
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57 // Allow FOREVER or not, based on bound |
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58 if (aTime == Lease.FOREVER) { |
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59 if (aBound == 0) |
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60 return Long.MAX_VALUE; |
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61 else |
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62 return myBound; |
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63 } |
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64 |
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65 // If ANY, use the sanitized bound |
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66 if (aTime == Lease.ANY) { |
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67 myDuration = myBound; |
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68 } |
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69 |
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70 if (myDuration > myBound) |
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71 return myBound; |
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72 else |
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73 return myDuration; |
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74 } |
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75 } |