author | alanb |
Fri, 02 Nov 2012 15:50:11 +0000 | |
changeset 14342 | 8435a30053c1 |
parent 12040 | 558b0e0d5910 |
child 16923 | 50bfa0defec2 |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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* Copyright (c) 1996, 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
25 |
package sun.rmi.server; |
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26 |
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27 |
import java.io.ByteArrayOutputStream; |
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28 |
import java.io.IOException; |
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29 |
import java.io.DataOutputStream; |
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30 |
import java.lang.reflect.Constructor; |
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31 |
import java.lang.reflect.InvocationHandler; |
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32 |
import java.lang.reflect.InvocationTargetException; |
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33 |
import java.lang.reflect.Proxy; |
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34 |
import java.lang.reflect.Method; |
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35 |
import java.rmi.Remote; |
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36 |
import java.rmi.RemoteException; |
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37 |
import java.rmi.StubNotFoundException; |
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38 |
import java.rmi.registry.Registry; |
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39 |
import java.rmi.server.LogStream; |
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40 |
import java.rmi.server.ObjID; |
|
41 |
import java.rmi.server.RMIClientSocketFactory; |
|
42 |
import java.rmi.server.RemoteObjectInvocationHandler; |
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43 |
import java.rmi.server.RemoteRef; |
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44 |
import java.rmi.server.RemoteStub; |
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45 |
import java.rmi.server.Skeleton; |
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46 |
import java.rmi.server.SkeletonNotFoundException; |
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47 |
import java.security.AccessController; |
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48 |
import java.security.MessageDigest; |
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49 |
import java.security.DigestOutputStream; |
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50 |
import java.security.NoSuchAlgorithmException; |
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51 |
import java.util.ArrayList; |
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52 |
import java.util.Collections; |
|
53 |
import java.util.Map; |
|
54 |
import java.util.WeakHashMap; |
|
55 |
import sun.rmi.registry.RegistryImpl; |
|
56 |
import sun.rmi.runtime.Log; |
|
57 |
import sun.rmi.transport.LiveRef; |
|
58 |
import sun.rmi.transport.tcp.TCPEndpoint; |
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59 |
import sun.security.action.GetBooleanAction; |
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60 |
import sun.security.action.GetPropertyAction; |
|
61 |
||
62 |
/** |
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63 |
* A utility class with static methods for creating stubs/proxies and |
|
64 |
* skeletons for remote objects. |
|
65 |
*/ |
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66 |
public final class Util { |
|
67 |
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68 |
/** "server" package log level */ |
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69 |
static final int logLevel = LogStream.parseLevel( |
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51 | 70 |
AccessController.doPrivileged( |
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new GetPropertyAction("sun.rmi.server.logLevel"))); |
72 |
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73 |
/** server reference log */ |
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74 |
public static final Log serverRefLog = |
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75 |
Log.getLog("sun.rmi.server.ref", "transport", Util.logLevel); |
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76 |
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77 |
/** cached value of property java.rmi.server.ignoreStubClasses */ |
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78 |
private static final boolean ignoreStubClasses = |
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51 | 79 |
AccessController.doPrivileged( |
80 |
new GetBooleanAction("java.rmi.server.ignoreStubClasses")). |
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2 | 81 |
booleanValue(); |
82 |
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83 |
/** cache of impl classes that have no corresponding stub class */ |
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51 | 84 |
private static final Map<Class<?>, Void> withoutStubs = |
85 |
Collections.synchronizedMap(new WeakHashMap<Class<?>, Void>(11)); |
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2 | 86 |
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87 |
/** parameter types for stub constructor */ |
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88 |
private static final Class[] stubConsParamTypes = { RemoteRef.class }; |
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90 |
private Util() { |
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91 |
} |
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92 |
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93 |
/** |
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94 |
* Returns a proxy for the specified implClass. |
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95 |
* |
|
96 |
* If both of the following criteria is satisfied, a dynamic proxy for |
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* the specified implClass is returned (otherwise a RemoteStub instance |
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98 |
* for the specified implClass is returned): |
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* |
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* a) either the property java.rmi.server.ignoreStubClasses is true or |
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* a pregenerated stub class does not exist for the impl class, and |
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* b) forceStubUse is false. |
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103 |
* |
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104 |
* If the above criteria are satisfied, this method constructs a |
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105 |
* dynamic proxy instance (that implements the remote interfaces of |
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* implClass) constructed with a RemoteObjectInvocationHandler instance |
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107 |
* constructed with the clientRef. |
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108 |
* |
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* Otherwise, this method loads the pregenerated stub class (which |
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* extends RemoteStub and implements the remote interfaces of |
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111 |
* implClass) and constructs an instance of the pregenerated stub |
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112 |
* class with the clientRef. |
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113 |
* |
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114 |
* @param implClass the class to obtain remote interfaces from |
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115 |
* @param clientRef the remote ref to use in the invocation handler |
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116 |
* @param forceStubUse if true, forces creation of a RemoteStub |
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117 |
* @throws IllegalArgumentException if implClass implements illegal |
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118 |
* remote interfaces |
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119 |
* @throws StubNotFoundException if problem locating/creating stub or |
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120 |
* creating the dynamic proxy instance |
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121 |
**/ |
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public static Remote createProxy(Class<?> implClass, |
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RemoteRef clientRef, |
124 |
boolean forceStubUse) |
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125 |
throws StubNotFoundException |
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126 |
{ |
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Class<?> remoteClass; |
2 | 128 |
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129 |
try { |
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130 |
remoteClass = getRemoteClass(implClass); |
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131 |
} catch (ClassNotFoundException ex ) { |
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132 |
throw new StubNotFoundException( |
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133 |
"object does not implement a remote interface: " + |
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implClass.getName()); |
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135 |
} |
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136 |
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137 |
if (forceStubUse || |
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138 |
!(ignoreStubClasses || !stubClassExists(remoteClass))) |
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139 |
{ |
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140 |
return createStub(remoteClass, clientRef); |
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141 |
} |
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142 |
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143 |
ClassLoader loader = implClass.getClassLoader(); |
|
144 |
Class[] interfaces = getRemoteInterfaces(implClass); |
|
145 |
InvocationHandler handler = |
|
146 |
new RemoteObjectInvocationHandler(clientRef); |
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147 |
||
148 |
/* REMIND: private remote interfaces? */ |
|
149 |
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150 |
try { |
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151 |
return (Remote) Proxy.newProxyInstance(loader, |
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152 |
interfaces, |
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153 |
handler); |
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154 |
} catch (IllegalArgumentException e) { |
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155 |
throw new StubNotFoundException("unable to create proxy", e); |
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156 |
} |
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157 |
} |
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158 |
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159 |
/** |
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160 |
* Returns true if a stub class for the given impl class can be loaded, |
|
161 |
* otherwise returns false. |
|
162 |
* |
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163 |
* @param remoteClass the class to obtain remote interfaces from |
|
164 |
*/ |
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private static boolean stubClassExists(Class<?> remoteClass) { |
2 | 166 |
if (!withoutStubs.containsKey(remoteClass)) { |
167 |
try { |
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168 |
Class.forName(remoteClass.getName() + "_Stub", |
|
169 |
false, |
|
170 |
remoteClass.getClassLoader()); |
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171 |
return true; |
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172 |
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173 |
} catch (ClassNotFoundException cnfe) { |
|
174 |
withoutStubs.put(remoteClass, null); |
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175 |
} |
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176 |
} |
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177 |
return false; |
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178 |
} |
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179 |
||
180 |
/* |
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181 |
* Returns the class/superclass that implements the remote interface. |
|
182 |
* @throws ClassNotFoundException if no class is found to have a |
|
183 |
* remote interface |
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184 |
*/ |
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private static Class<?> getRemoteClass(Class<?> cl) |
2 | 186 |
throws ClassNotFoundException |
187 |
{ |
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188 |
while (cl != null) { |
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Class<?>[] interfaces = cl.getInterfaces(); |
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for (int i = interfaces.length -1; i >= 0; i--) { |
191 |
if (Remote.class.isAssignableFrom(interfaces[i])) |
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192 |
return cl; // this class implements remote object |
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} |
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cl = cl.getSuperclass(); |
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195 |
} |
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196 |
throw new ClassNotFoundException( |
|
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"class does not implement java.rmi.Remote"); |
|
198 |
} |
|
199 |
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200 |
/** |
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201 |
* Returns an array containing the remote interfaces implemented |
|
202 |
* by the given class. |
|
203 |
* |
|
204 |
* @param remoteClass the class to obtain remote interfaces from |
|
205 |
* @throws IllegalArgumentException if remoteClass implements |
|
206 |
* any illegal remote interfaces |
|
207 |
* @throws NullPointerException if remoteClass is null |
|
208 |
*/ |
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private static Class<?>[] getRemoteInterfaces(Class<?> remoteClass) { |
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ArrayList<Class<?>> list = new ArrayList<>(); |
2 | 211 |
getRemoteInterfaces(list, remoteClass); |
51 | 212 |
return list.toArray(new Class<?>[list.size()]); |
2 | 213 |
} |
214 |
||
215 |
/** |
|
216 |
* Fills the given array list with the remote interfaces implemented |
|
217 |
* by the given class. |
|
218 |
* |
|
219 |
* @throws IllegalArgumentException if the specified class implements |
|
220 |
* any illegal remote interfaces |
|
221 |
* @throws NullPointerException if the specified class or list is null |
|
222 |
*/ |
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private static void getRemoteInterfaces(ArrayList<Class<?>> list, Class<?> cl) { |
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Class<?> superclass = cl.getSuperclass(); |
2 | 225 |
if (superclass != null) { |
226 |
getRemoteInterfaces(list, superclass); |
|
227 |
} |
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228 |
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Class<?>[] interfaces = cl.getInterfaces(); |
2 | 230 |
for (int i = 0; i < interfaces.length; i++) { |
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231 |
Class<?> intf = interfaces[i]; |
2 | 232 |
/* |
233 |
* If it is a remote interface (if it extends from |
|
234 |
* java.rmi.Remote) and is not already in the list, |
|
235 |
* then add the interface to the list. |
|
236 |
*/ |
|
237 |
if (Remote.class.isAssignableFrom(intf)) { |
|
238 |
if (!(list.contains(intf))) { |
|
239 |
Method[] methods = intf.getMethods(); |
|
240 |
for (int j = 0; j < methods.length; j++) { |
|
241 |
checkMethod(methods[j]); |
|
242 |
} |
|
243 |
list.add(intf); |
|
244 |
} |
|
245 |
} |
|
246 |
} |
|
247 |
} |
|
248 |
||
249 |
/** |
|
250 |
* Verifies that the supplied method has at least one declared exception |
|
251 |
* type that is RemoteException or one of its superclasses. If not, |
|
252 |
* then this method throws IllegalArgumentException. |
|
253 |
* |
|
254 |
* @throws IllegalArgumentException if m is an illegal remote method |
|
255 |
*/ |
|
256 |
private static void checkMethod(Method m) { |
|
51 | 257 |
Class<?>[] ex = m.getExceptionTypes(); |
2 | 258 |
for (int i = 0; i < ex.length; i++) { |
259 |
if (ex[i].isAssignableFrom(RemoteException.class)) |
|
260 |
return; |
|
261 |
} |
|
262 |
throw new IllegalArgumentException( |
|
263 |
"illegal remote method encountered: " + m); |
|
264 |
} |
|
265 |
||
266 |
/** |
|
267 |
* Creates a RemoteStub instance for the specified class, constructed |
|
268 |
* with the specified RemoteRef. The supplied class must be the most |
|
269 |
* derived class in the remote object's superclass chain that |
|
270 |
* implements a remote interface. The stub class name is the name of |
|
271 |
* the specified remoteClass with the suffix "_Stub". The loading of |
|
272 |
* the stub class is initiated from class loader of the specified class |
|
273 |
* (which may be the bootstrap class loader). |
|
274 |
**/ |
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275 |
private static RemoteStub createStub(Class<?> remoteClass, RemoteRef ref) |
2 | 276 |
throws StubNotFoundException |
277 |
{ |
|
278 |
String stubname = remoteClass.getName() + "_Stub"; |
|
279 |
||
280 |
/* Make sure to use the local stub loader for the stub classes. |
|
281 |
* When loaded by the local loader the load path can be |
|
282 |
* propagated to remote clients, by the MarshalOutputStream/InStream |
|
283 |
* pickle methods |
|
284 |
*/ |
|
285 |
try { |
|
51 | 286 |
Class<?> stubcl = |
2 | 287 |
Class.forName(stubname, false, remoteClass.getClassLoader()); |
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|
288 |
Constructor<?> cons = stubcl.getConstructor(stubConsParamTypes); |
2 | 289 |
return (RemoteStub) cons.newInstance(new Object[] { ref }); |
290 |
||
291 |
} catch (ClassNotFoundException e) { |
|
292 |
throw new StubNotFoundException( |
|
293 |
"Stub class not found: " + stubname, e); |
|
294 |
} catch (NoSuchMethodException e) { |
|
295 |
throw new StubNotFoundException( |
|
296 |
"Stub class missing constructor: " + stubname, e); |
|
297 |
} catch (InstantiationException e) { |
|
298 |
throw new StubNotFoundException( |
|
299 |
"Can't create instance of stub class: " + stubname, e); |
|
300 |
} catch (IllegalAccessException e) { |
|
301 |
throw new StubNotFoundException( |
|
302 |
"Stub class constructor not public: " + stubname, e); |
|
303 |
} catch (InvocationTargetException e) { |
|
304 |
throw new StubNotFoundException( |
|
305 |
"Exception creating instance of stub class: " + stubname, e); |
|
306 |
} catch (ClassCastException e) { |
|
307 |
throw new StubNotFoundException( |
|
308 |
"Stub class not instance of RemoteStub: " + stubname, e); |
|
309 |
} |
|
310 |
} |
|
311 |
||
312 |
/** |
|
313 |
* Locate and return the Skeleton for the specified remote object |
|
314 |
*/ |
|
315 |
static Skeleton createSkeleton(Remote object) |
|
316 |
throws SkeletonNotFoundException |
|
317 |
{ |
|
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|
318 |
Class<?> cl; |
2 | 319 |
try { |
320 |
cl = getRemoteClass(object.getClass()); |
|
321 |
} catch (ClassNotFoundException ex ) { |
|
322 |
throw new SkeletonNotFoundException( |
|
323 |
"object does not implement a remote interface: " + |
|
324 |
object.getClass().getName()); |
|
325 |
} |
|
326 |
||
327 |
// now try to load the skeleton based ont he name of the class |
|
328 |
String skelname = cl.getName() + "_Skel"; |
|
329 |
try { |
|
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330 |
Class<?> skelcl = Class.forName(skelname, false, cl.getClassLoader()); |
2 | 331 |
|
332 |
return (Skeleton)skelcl.newInstance(); |
|
333 |
} catch (ClassNotFoundException ex) { |
|
334 |
throw new SkeletonNotFoundException("Skeleton class not found: " + |
|
335 |
skelname, ex); |
|
336 |
} catch (InstantiationException ex) { |
|
337 |
throw new SkeletonNotFoundException("Can't create skeleton: " + |
|
338 |
skelname, ex); |
|
339 |
} catch (IllegalAccessException ex) { |
|
340 |
throw new SkeletonNotFoundException("No public constructor: " + |
|
341 |
skelname, ex); |
|
342 |
} catch (ClassCastException ex) { |
|
343 |
throw new SkeletonNotFoundException( |
|
344 |
"Skeleton not of correct class: " + skelname, ex); |
|
345 |
} |
|
346 |
} |
|
347 |
||
348 |
/** |
|
349 |
* Compute the "method hash" of a remote method. The method hash |
|
350 |
* is a long containing the first 64 bits of the SHA digest from |
|
351 |
* the UTF encoded string of the method name and descriptor. |
|
352 |
*/ |
|
353 |
public static long computeMethodHash(Method m) { |
|
354 |
long hash = 0; |
|
355 |
ByteArrayOutputStream sink = new ByteArrayOutputStream(127); |
|
356 |
try { |
|
357 |
MessageDigest md = MessageDigest.getInstance("SHA"); |
|
358 |
DataOutputStream out = new DataOutputStream( |
|
359 |
new DigestOutputStream(sink, md)); |
|
360 |
||
361 |
String s = getMethodNameAndDescriptor(m); |
|
362 |
if (serverRefLog.isLoggable(Log.VERBOSE)) { |
|
363 |
serverRefLog.log(Log.VERBOSE, |
|
364 |
"string used for method hash: \"" + s + "\""); |
|
365 |
} |
|
366 |
out.writeUTF(s); |
|
367 |
||
368 |
// use only the first 64 bits of the digest for the hash |
|
369 |
out.flush(); |
|
370 |
byte hasharray[] = md.digest(); |
|
371 |
for (int i = 0; i < Math.min(8, hasharray.length); i++) { |
|
372 |
hash += ((long) (hasharray[i] & 0xFF)) << (i * 8); |
|
373 |
} |
|
374 |
} catch (IOException ignore) { |
|
375 |
/* can't happen, but be deterministic anyway. */ |
|
376 |
hash = -1; |
|
377 |
} catch (NoSuchAlgorithmException complain) { |
|
378 |
throw new SecurityException(complain.getMessage()); |
|
379 |
} |
|
380 |
return hash; |
|
381 |
} |
|
382 |
||
383 |
/** |
|
384 |
* Return a string consisting of the given method's name followed by |
|
385 |
* its "method descriptor", as appropriate for use in the computation |
|
386 |
* of the "method hash". |
|
387 |
* |
|
388 |
* See section 4.3.3 of The Java Virtual Machine Specification for |
|
389 |
* the definition of a "method descriptor". |
|
390 |
*/ |
|
391 |
private static String getMethodNameAndDescriptor(Method m) { |
|
392 |
StringBuffer desc = new StringBuffer(m.getName()); |
|
393 |
desc.append('('); |
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|
394 |
Class<?>[] paramTypes = m.getParameterTypes(); |
2 | 395 |
for (int i = 0; i < paramTypes.length; i++) { |
396 |
desc.append(getTypeDescriptor(paramTypes[i])); |
|
397 |
} |
|
398 |
desc.append(')'); |
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|
399 |
Class<?> returnType = m.getReturnType(); |
2 | 400 |
if (returnType == void.class) { // optimization: handle void here |
401 |
desc.append('V'); |
|
402 |
} else { |
|
403 |
desc.append(getTypeDescriptor(returnType)); |
|
404 |
} |
|
405 |
return desc.toString(); |
|
406 |
} |
|
407 |
||
408 |
/** |
|
409 |
* Get the descriptor of a particular type, as appropriate for either |
|
410 |
* a parameter or return type in a method descriptor. |
|
411 |
*/ |
|
12040
558b0e0d5910
7146763: Warnings cleanup in the sun.rmi and related packages
khazra
parents:
5506
diff
changeset
|
412 |
private static String getTypeDescriptor(Class<?> type) { |
2 | 413 |
if (type.isPrimitive()) { |
414 |
if (type == int.class) { |
|
415 |
return "I"; |
|
416 |
} else if (type == boolean.class) { |
|
417 |
return "Z"; |
|
418 |
} else if (type == byte.class) { |
|
419 |
return "B"; |
|
420 |
} else if (type == char.class) { |
|
421 |
return "C"; |
|
422 |
} else if (type == short.class) { |
|
423 |
return "S"; |
|
424 |
} else if (type == long.class) { |
|
425 |
return "J"; |
|
426 |
} else if (type == float.class) { |
|
427 |
return "F"; |
|
428 |
} else if (type == double.class) { |
|
429 |
return "D"; |
|
430 |
} else if (type == void.class) { |
|
431 |
return "V"; |
|
432 |
} else { |
|
433 |
throw new Error("unrecognized primitive type: " + type); |
|
434 |
} |
|
435 |
} else if (type.isArray()) { |
|
436 |
/* |
|
437 |
* According to JLS 20.3.2, the getName() method on Class does |
|
438 |
* return the VM type descriptor format for array classes (only); |
|
439 |
* using that should be quicker than the otherwise obvious code: |
|
440 |
* |
|
441 |
* return "[" + getTypeDescriptor(type.getComponentType()); |
|
442 |
*/ |
|
443 |
return type.getName().replace('.', '/'); |
|
444 |
} else { |
|
445 |
return "L" + type.getName().replace('.', '/') + ";"; |
|
446 |
} |
|
447 |
} |
|
448 |
||
449 |
/** |
|
450 |
* Returns the binary name of the given type without package |
|
451 |
* qualification. Nested types are treated no differently from |
|
452 |
* top-level types, so for a nested type, the returned name will |
|
453 |
* still be qualified with the simple name of its enclosing |
|
454 |
* top-level type (and perhaps other enclosing types), the |
|
455 |
* separator will be '$', etc. |
|
456 |
**/ |
|
12040
558b0e0d5910
7146763: Warnings cleanup in the sun.rmi and related packages
khazra
parents:
5506
diff
changeset
|
457 |
public static String getUnqualifiedName(Class<?> c) { |
2 | 458 |
String binaryName = c.getName(); |
459 |
return binaryName.substring(binaryName.lastIndexOf('.') + 1); |
|
460 |
} |
|
461 |
} |