Mercurial > hg > blitz_condensed
annotate src/org/dancres/blitz/oid/AllocatorFactory.java @ 34:6f68e94c1fb8 default tip
Add CondensedStats monitoring utility, equivalent to vmstat
author | Dominic Cleal <dominic-cleal@cdo2.com> |
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date | Thu, 05 Aug 2010 11:07:25 +0100 |
parents | 3dc0c5604566 |
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0
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1 package org.dancres.blitz.oid; |
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2 |
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3 import java.io.File; |
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4 import java.io.IOException; |
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5 |
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6 import java.util.Map; |
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7 import java.util.HashMap; |
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8 |
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9 import net.jini.config.ConfigurationException; |
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10 |
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11 import org.dancres.blitz.disk.DiskTxn; |
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12 |
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13 import org.dancres.blitz.config.ConfigurationFactory; |
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14 |
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15 import org.dancres.blitz.meta.RegistryFactory; |
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16 import org.dancres.blitz.meta.Registry; |
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17 |
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18 public class AllocatorFactory { |
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19 |
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20 private static int DEFAULT_MAX_ALLOCATORS; |
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21 |
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22 static { |
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23 try { |
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24 DEFAULT_MAX_ALLOCATORS = |
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25 ((Integer) |
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26 ConfigurationFactory.getEntry("maxOidAllocators", |
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27 int.class, |
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28 new Integer(4))).intValue(); |
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29 } catch (ConfigurationException aCE) { |
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30 } |
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31 } |
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32 |
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33 private static Map theAllocators = new HashMap(); |
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34 |
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35 public static Allocator get(String aName, boolean isFifo) |
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36 throws IOException { |
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37 return get(aName, DEFAULT_MAX_ALLOCATORS, isFifo); |
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38 } |
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39 |
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40 public static Allocator get(String aName, int anAllocSpaceSize, |
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41 boolean isFifo) |
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42 throws IOException { |
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43 return getImpl(aName, anAllocSpaceSize, isFifo); |
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44 } |
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45 |
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46 static Allocator getImpl(String aName, int anAllocSpaceSize, |
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47 boolean isFifo) |
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48 throws IOException { |
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49 |
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50 synchronized(theAllocators) { |
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51 Allocator myData = (Allocator) theAllocators.get(aName); |
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52 |
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53 if (myData == null) { |
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54 myData = newAllocator(aName, anAllocSpaceSize, isFifo); |
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55 theAllocators.put(aName, myData); |
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56 } |
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57 |
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58 return myData; |
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59 } |
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60 } |
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61 |
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62 public static void delete(String aName) throws IOException { |
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63 synchronized(theAllocators) { |
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64 AllocatorAdmin myData = |
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65 (AllocatorAdmin) theAllocators.remove(aName); |
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66 |
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67 if (myData != null) |
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68 myData.delete(); |
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69 } |
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70 } |
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71 |
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72 private static Allocator newAllocator(String aName, |
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73 int anAllocSpaceSize, |
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74 boolean isFifo) |
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75 throws IOException { |
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76 |
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77 if (isFifo) |
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78 return new FIFOAllocatorImpl(aName); |
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79 else |
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80 return new AllocatorImpl(aName, anAllocSpaceSize); |
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81 } |
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82 } |