Mercurial > hg > blitz_condensed
annotate src/org/dancres/blitz/config/EntryConstraints.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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0
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1 package org.dancres.blitz.config; |
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2 |
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3 import java.util.HashMap; |
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4 |
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5 import java.util.logging.Level; |
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6 |
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7 import net.jini.config.ConfigurationException; |
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8 |
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9 import org.dancres.blitz.config.*; |
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10 |
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11 /** |
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12 * @todo Move this into the config package and add a factory to track all |
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13 * of them. Also define a MINIMAL_CONSTRAINTS static which is an instance of |
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14 * this class created via the null constructor. |
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15 */ |
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16 public class EntryConstraints { |
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17 |
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18 public static final EntryConstraints MINIMUM = |
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19 new EntryConstraints(); |
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20 |
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21 private static int DEFAULT_CACHE_SIZE; |
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22 private static int DEFAULT_READ_AHEAD; |
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23 |
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24 static { |
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25 try { |
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26 DEFAULT_CACHE_SIZE = |
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27 ((Integer) |
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28 ConfigurationFactory.getEntry("entryReposCacheSize", |
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29 int.class, |
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30 new Integer(200))).intValue(); |
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31 |
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32 ConfigurationFactory.theLogger.log(Level.INFO, |
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33 "Cache size: " + DEFAULT_CACHE_SIZE); |
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34 |
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35 DEFAULT_READ_AHEAD = |
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36 ((Integer) |
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37 ConfigurationFactory.getEntry("entryReposReadahead", |
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38 int.class, |
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39 new Integer(0))).intValue(); |
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40 |
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41 ConfigurationFactory.theLogger.log(Level.INFO, |
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42 "Read ahead: " + DEFAULT_READ_AHEAD); |
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43 } catch (ConfigurationException aCE) { |
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44 } |
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45 } |
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46 |
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47 private static HashMap theAllConstraints = new HashMap(); |
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48 |
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49 private HashMap theConstraints = new HashMap(); |
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50 private String theType; |
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51 |
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52 public static EntryConstraints getConstraints(String aType) |
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53 throws ConfigurationException { |
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54 synchronized(theAllConstraints) { |
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55 EntryConstraints myConstraints = |
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56 (EntryConstraints) theAllConstraints.get(aType); |
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57 |
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58 if (myConstraints == null) { |
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59 myConstraints = new EntryConstraints(aType); |
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60 |
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61 theAllConstraints.put(aType, myConstraints); |
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62 } |
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63 |
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64 return myConstraints; |
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65 } |
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66 } |
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67 |
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68 /** |
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69 Create an instance of EntryConstraints with no settings loaded from |
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70 config and a minimal set of useful constraints. |
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71 */ |
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72 private EntryConstraints() { |
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73 theConstraints.put(CacheSize.class, new CacheSize(1)); |
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74 } |
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75 |
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76 private EntryConstraints(String aType) throws ConfigurationException { |
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77 theType = aType; |
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78 |
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79 init(); |
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80 } |
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81 |
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82 private void init() throws ConfigurationException { |
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83 String myConfigName = theType.replaceAll("\\.", "_"); |
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84 myConfigName = myConfigName.replaceAll("\\$", "_"); |
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85 |
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86 EntryConstraint[] myConstraints = (EntryConstraint[]) |
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87 ConfigurationFactory.getEntry(myConfigName, |
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88 EntryConstraint[].class, |
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89 new EntryConstraint[0]); |
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90 |
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91 for (int i = 0; i < myConstraints.length; i++) { |
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92 theConstraints.put(myConstraints[i].getClass(), myConstraints[i]); |
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93 } |
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94 |
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95 if (theConstraints.get(CacheSize.class) == null) { |
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96 theConstraints.put(CacheSize.class, |
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97 new CacheSize(DEFAULT_CACHE_SIZE)); |
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98 } |
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99 |
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100 // If FIFO is enabled, force read ahead to zero |
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101 // |
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102 if (theConstraints.get(Fifo.class) != null) { |
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103 theConstraints.put(ReadAhead.class, new ReadAhead(0)); |
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104 } else { |
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105 if (theConstraints.get(ReadAhead.class) == null) { |
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106 theConstraints.put(ReadAhead.class, |
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107 new ReadAhead(DEFAULT_READ_AHEAD)); |
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108 } |
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109 } |
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110 } |
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111 |
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112 public EntryConstraint get(Class aConstraint) { |
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113 EntryConstraint myResult = |
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114 (EntryConstraint) theConstraints.get(aConstraint); |
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115 |
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116 return myResult; |
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117 } |
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118 } |