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annotate c1x4hotspotsrc/HotSpotVM/src/com/sun/hotspot/c1x/InvocationSocket.java @ 2289:6190d20bd6d6

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merge
author Lukas Stadler <lukas.stadler@jku.at>
date Mon, 11 Apr 2011 11:25:06 +0200
parents 8c426c2891c8
children 160aacf936ad
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1 /*
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2 * Copyright (c) 2010 Sun Microsystems, Inc. All rights reserved.
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3 *
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4 * Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
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5 * that is described in this document. In particular, and without limitation, these intellectual property
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6 * rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
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7 * more additional patents or pending patent applications in the U.S. and in other countries.
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8 *
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9 * U.S. Government Rights - Commercial software. Government users are subject to the Sun
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10 * Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
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11 * supplements.
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12 *
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13 * Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
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14 * registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
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15 * are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
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16 * U.S. and other countries.
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17 *
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18 * UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
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19 * Company, Ltd.
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20 */
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21 package com.sun.hotspot.c1x;
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22
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23 import java.io.*;
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24 import java.lang.reflect.*;
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25
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26 import com.sun.hotspot.c1x.logging.*;
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27
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28 /**
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29 * A java.lang.reflect proxy that communicates over a socket connection.
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30 *
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31 * Calling a method sends the method name and the parameters through the socket. Afterwards this class waits for a result.
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32 * While waiting for a result three types of objects can arrive through the socket: a method invocation, a method result or an exception.
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33 * Method invocation can thus be recursive.
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34 *
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35 * @author Lukas Stadler
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36 */
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37 public class InvocationSocket {
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38
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39 private final ObjectOutputStream output;
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40 private final ObjectInputStream input;
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41
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42 public InvocationSocket(ObjectOutputStream output, ObjectInputStream input) {
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43 this.output = output;
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44 this.input = input;
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45 }
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46
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47 private static class Invocation implements Serializable {
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48
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49 public Object receiver;
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50 public String methodName;
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51 public Object[] args;
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52
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53 public Invocation(Object receiver, String methodName, Object[] args) {
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54 this.receiver = receiver;
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55 this.methodName = methodName;
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56 this.args = args;
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57 }
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58 }
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59
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60 private static class Result implements Serializable {
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61
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62 public Object result;
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63
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64 public Result(Object result) {
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65 this.result = result;
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66 }
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67 }
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68
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69 public class Handler implements InvocationHandler {
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70 private Object receiver;
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71
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72 public Handler(Object receiver) {
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73 this.receiver = receiver;
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74 }
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75
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76 @Override
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77 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
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78 if (!method.getDeclaringClass().isInterface()) {
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79 return method.invoke(receiver, args);
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80 }
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81 try {
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82 Logger.startScope("invoking remote " + method.getName());
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83 output.writeObject(new Invocation(receiver, method.getName(), args));
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84 output.flush();
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85 return waitForResult();
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86 } catch (Throwable t) {
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87 t.printStackTrace();
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88 throw t;
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89 } finally {
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90 Logger.endScope("");
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91 }
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92 }
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93 }
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94
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95 public Object waitForResult() throws IOException, ClassNotFoundException {
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96 while (true) {
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97 Object in = input.readObject();
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98 if (in instanceof Result) {
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99 return ((Result) in).result;
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100 } else if (in instanceof RuntimeException) {
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101 throw (RuntimeException) in;
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102 } else if (in instanceof Throwable) {
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103 throw new RuntimeException((Throwable) in);
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104 }
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105
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106 Invocation invoke = (Invocation) in;
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107 Method method = null;
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108 for (Class<?> clazz = invoke.receiver.getClass(); clazz != null; clazz = clazz.getSuperclass()) {
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109 for (Method m : clazz.getDeclaredMethods()) {
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110 if (invoke.methodName.equals(m.getName())) {
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111 method = m;
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112 break;
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113 }
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114 }
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115 }
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116 if (method == null) {
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117 Exception e = new UnsupportedOperationException("unknown method " + invoke.methodName);
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118 e.printStackTrace();
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119 output.writeObject(e);
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120 output.flush();
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121 } else {
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122 Object result;
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123 try {
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124 if (invoke.args == null) {
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125 Logger.startScope("invoking local " + invoke.methodName);
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126 result = method.invoke(invoke.receiver);
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127 } else {
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128 if (Logger.ENABLED) {
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129 StringBuilder str = new StringBuilder();
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130 str.append("invoking local " + invoke.methodName + "(");
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131 for (int i = 0; i < invoke.args.length; i++) {
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132 str.append(i == 0 ? "" : ", ");
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133 str.append(Logger.pretty(invoke.args[i]));
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134 }
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135 str.append(")");
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136 Logger.startScope(str.toString());
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137 }
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138 result = method.invoke(invoke.receiver, invoke.args);
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139 }
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140 result = new Result(result);
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141 } catch (IllegalArgumentException e) {
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142 System.out.println("error while invoking " + invoke.methodName);
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143 e.getCause().printStackTrace();
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144 result = e.getCause();
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145 } catch (InvocationTargetException e) {
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146 System.out.println("error while invoking " + invoke.methodName);
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147 e.getCause().printStackTrace();
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148 result = e.getCause();
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149 } catch (IllegalAccessException e) {
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150 System.out.println("error while invoking " + invoke.methodName);
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151 e.getCause().printStackTrace();
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152 result = e.getCause();
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153 } finally {
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154 Logger.endScope("");
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155 }
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156 output.writeObject(result);
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157 output.flush();
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158 }
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159 }
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160 }
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161
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162 public void sendResult(Object obj) throws IOException {
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163 output.writeObject(new Result(obj));
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164 output.flush();
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165 }
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166
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167 }