Mercurial > hg > blitz_stable
annotate src/org/dancres/io/AnnotatingObjectInputStream.java @ 35:6f68e94c1fb8 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.io; |
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2 |
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3 import java.io.IOException; |
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4 import java.io.ObjectInputStream; |
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5 import java.io.InputStream; |
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6 import java.io.ObjectStreamClass; |
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7 |
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8 import java.util.Map; |
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9 import java.util.HashMap; |
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10 import java.util.Collection; |
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11 import java.util.Collections; |
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12 import java.util.logging.Logger; |
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13 import java.util.logging.Level; |
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14 |
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15 import net.jini.loader.ClassLoading; |
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16 |
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17 import net.jini.io.ObjectStreamContext; |
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18 import net.jini.io.context.IntegrityEnforcement; |
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19 |
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20 /** |
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21 Takes a stream of codebase annotations and a second stream of object data |
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22 and combines them to produce de-serialized objects. Object verification |
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23 can be optionally enabled at construction time. |
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24 */ |
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25 public class AnnotatingObjectInputStream |
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26 extends ObjectInputStream implements ObjectStreamContext { |
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27 |
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28 private static final Logger theLogger = |
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29 Logger.getLogger("org.dancres.io.AnnotatingObjectInputStream"); |
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30 |
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31 private ObjectInputStream theAnnotations; |
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32 private ClassLoader theLoader; |
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33 |
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34 private Collection theContext; |
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35 |
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36 private boolean requireIntegrityCheck; |
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37 |
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38 private static final Map thePrimitiveClasses = new HashMap(); |
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39 static { |
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40 thePrimitiveClasses.put("boolean", boolean.class); |
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41 thePrimitiveClasses.put("byte", byte.class); |
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42 thePrimitiveClasses.put("char", char.class); |
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43 thePrimitiveClasses.put("short", short.class); |
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44 thePrimitiveClasses.put("int", int.class); |
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45 thePrimitiveClasses.put("long", long.class); |
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46 thePrimitiveClasses.put("float", float.class); |
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47 thePrimitiveClasses.put("double", double.class); |
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48 thePrimitiveClasses.put("void", void.class); |
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49 } |
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50 |
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51 public AnnotatingObjectInputStream(ClassLoader aLoader, |
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52 InputStream anObjStream, |
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53 InputStream anAnnStream, |
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54 final boolean checkIntegrity) |
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55 throws IOException { |
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56 |
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57 super(anObjStream); |
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58 theAnnotations = new ObjectInputStream(anAnnStream); |
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59 theLoader = aLoader; |
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60 requireIntegrityCheck = checkIntegrity; |
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61 |
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62 theContext = |
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63 Collections.singleton( |
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64 new IntegrityEnforcement() { |
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65 public boolean integrityEnforced() { |
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66 return checkIntegrity; |
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67 } |
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68 } |
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69 ); |
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70 } |
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71 |
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72 public Collection getObjectStreamContext() { |
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73 return theContext; |
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74 } |
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75 |
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76 private String getAnnotation() throws IOException, ClassNotFoundException { |
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77 return (String) theAnnotations.readObject(); |
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78 } |
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79 |
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80 protected Class resolveClass(ObjectStreamClass aClassDesc) |
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81 throws IOException, ClassNotFoundException { |
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82 |
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83 String myAnnotation = getAnnotation(); |
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84 String myClassName = aClassDesc.getName(); |
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85 |
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86 Class myClass = (Class) thePrimitiveClasses.get(myClassName); |
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87 |
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88 if (myClass != null) |
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89 return myClass; |
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90 |
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91 if (theLogger.isLoggable(Level.FINEST)) { |
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92 theLogger.log(Level.FINEST, "Attempting to load " + myClassName + |
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93 ".class from " + myAnnotation); |
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94 } |
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95 |
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96 return ClassLoading.loadClass(myAnnotation, myClassName, theLoader, |
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97 requireIntegrityCheck, null); |
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98 } |
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99 |
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100 protected Class resolveProxyClass(String[] aListOfInterfaces) |
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101 throws IOException, ClassNotFoundException { |
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102 |
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103 String myAnnotation = getAnnotation(); |
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104 |
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105 return ClassLoading.loadProxyClass(myAnnotation, aListOfInterfaces, |
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106 theLoader, requireIntegrityCheck, |
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107 null); |
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108 } |
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109 |
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110 public void close() throws IOException { |
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111 super.close(); |
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112 theAnnotations.close(); |
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113 } |
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114 } |