Mercurial > hg > blitz_stable

annotate src/org/dancres/blitz/util/Time.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.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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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 }