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1
5 package com.tc.object.loaders;
6
7 import com.tc.object.ClientObjectManager;
8 import com.tc.object.bytecode.Manager;
9 import com.tc.object.bytecode.ManagerImpl;
10 import com.tc.object.bytecode.hook.impl.ClassProcessorHelper;
11 import com.tc.object.bytecode.hook.impl.DSOContextImpl;
12 import com.tc.object.bytecode.hook.impl.PreparedComponentsFromL2Connection;
13 import com.tc.object.config.DSOClientConfigHelper;
14 import com.tc.object.tx.ClientTransactionManager;
15
16 import java.net.URL  ;
17 import java.net.URLClassLoader ;
18 import java.util.HashMap ;
19
20
24 public class IsolationClassLoader extends URLClassLoader implements NamedClassLoader {
25 private static final ClassLoader SYSTEM_LOADER = ClassLoader.getSystemClassLoader();
26
27 private final Manager manager;
28 private final DSOClientConfigHelper config;
29 private final HashMap onLoadErrors;
30 private final StandardClassProvider classProvider;
31
32 public IsolationClassLoader(DSOClientConfigHelper config, PreparedComponentsFromL2Connection connectionComponents) {
33 this(config, true, null, null, connectionComponents);
34 }
35
36 public IsolationClassLoader(DSOClientConfigHelper config, ClientObjectManager objectManager,
37 ClientTransactionManager txManager) {
38 this(config, false, objectManager, txManager, null);
39 }
40
41 private IsolationClassLoader(DSOClientConfigHelper config, boolean startClient, ClientObjectManager objectManager,
42 ClientTransactionManager txManager,
43 PreparedComponentsFromL2Connection connectionComponents) {
44 super(getSystemURLS(), null);
45 this.config = config;
46 this.classProvider = new StandardClassProvider();
47 this.manager = createManager(startClient, objectManager, txManager, config, connectionComponents);
48 this.onLoadErrors = new HashMap ();
49 }
50
51 public void init() {
52 manager.init();
53 ClassProcessorHelper.setContext(this, DSOContextImpl.createContext(config, classProvider, manager));
54 }
55
56 private static URL [] getSystemURLS() {
57 return ((URLClassLoader ) SYSTEM_LOADER).getURLs();
58 }
59
60 private Manager createManager(boolean startClient, ClientObjectManager objectManager,
61 ClientTransactionManager txManager, DSOClientConfigHelper theConfig,
62 PreparedComponentsFromL2Connection connectionComponents) {
63 classProvider.registerNamedLoader(this);
64 return new ManagerImpl(startClient, objectManager, txManager, theConfig, classProvider, connectionComponents, false);
65 }
66
67 public void stop() {
68 this.manager.stop();
69 }
70
71 public Class loadClass(String name) throws ClassNotFoundException {
72 throwIfNeeded(name);
73
74 if (name.startsWith("com.tc.")) {
75 return SYSTEM_LOADER.loadClass(name);
76 } else {
77 return super.loadClass(name);
78 }
79 }
80
81 private void throwIfNeeded(String name) throws ClassNotFoundException {
82 final String t = (String )onLoadErrors.get(name);
84 if (t != null) {
85 ClassNotFoundException rv = new ClassNotFoundException (t);
86 throw rv;
87 }
88 }
89
90 public String __tc_getClassLoaderName() {
91 return getClass().getName();
92 }
93
94 public void __tc_setClassLoaderName(String name) {
95 throw new AssertionError ();
96 }
97
98
101 public void throwOnLoad(String className, String errorMessage) {
102 onLoadErrors.put(className, errorMessage);
103 }
104
105 protected Class findClass(String name) throws ClassNotFoundException {
106 throwIfNeeded(name);
107 return super.findClass(name);
108 }
109 }
110 |
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