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1 package global;
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2
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3 import fschmidt.util.servlet.HttpCache;
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4 import nabble.model.Init;
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5
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6
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7 enum WebCache implements HttpCache {
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8 INSTANCE;
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9
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10 private static final long hour = 1000L*60*60;
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11 private static final long cacheTime = Init.get("cacheTime",hour);
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12
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13 private long mod = now();
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14
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15 private static long now() {
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16 return System.currentTimeMillis()/1000*1000;
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17 }
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18
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19 public synchronized long[] lastModifieds(String[] modifyingEvents) {
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20 long now = now();
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21 if( now - mod > cacheTime )
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22 mod = now;
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23 long[] rtn = new long[modifyingEvents.length];
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24 for( int i=0; i<modifyingEvents.length; i++ ) {
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25 rtn[i] = mod;
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26 }
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27 return rtn;
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28 }
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29
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30 public void modified(String modifyingEvent) {
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31 throw new UnsupportedOperationException();
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32 }
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33
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34 public synchronized void clear() {
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35 mod = now();
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36 }
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37
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38 }
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