annotate graal/Runtime/src/com/sun/hotspot/c1x/logging/CountingProxy.java @ 2297:099e697d8934

Renaming c1x4hotspotsrc => graal and HotSpotVM => Runtime
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Fri, 22 Apr 2011 15:08:53 +0200
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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.logging;
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22
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23 import java.lang.reflect.*;
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24 import java.util.*;
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25
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26 import com.sun.hotspot.c1x.server.*;
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27
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28 /**
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29 * A java.lang.reflect proxy that hierarchically logs all method invocations along with their parameters and return
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30 * values.
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31 *
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32 * @author Lukas Stadler
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33 */
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34 public class CountingProxy<T> implements InvocationHandler {
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35
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36 public static final boolean ENABLED = Boolean.valueOf(System.getProperty("c1x.countcalls"));
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37
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38 private T delegate;
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39
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40 private Map<Method, Long> calls = new HashMap<Method, Long>();
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41
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42 public CountingProxy(T delegate) {
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43 assert ENABLED;
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44 System.out.println("Counting proxy for " + delegate.getClass().getSimpleName() + " created");
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45 this.delegate = delegate;
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46 proxies.add(this);
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47 }
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48
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49 @Override
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50 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
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51 int argCount = args == null ? 0 : args.length;
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52 if (method.getParameterTypes().length != argCount) {
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53 throw new RuntimeException("wrong parameter count");
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54 }
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55 final Object result;
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56 long count = calls.containsKey(method) ? calls.get(method) : 0;
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57 calls.put(method, count + 1);
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58 try {
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59 if (args == null) {
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60 result = method.invoke(delegate);
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61 } else {
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62 result = method.invoke(delegate, args);
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63 }
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64 } catch (InvocationTargetException e) {
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65 throw e.getCause();
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66 }
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67 return result;
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68 }
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69
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70 public static <T> T getProxy(Class<T> interf, T delegate) {
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71 Class<?>[] interfaces = ReplacingStreams.getAllInterfaces(delegate.getClass());
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72 Object obj = Proxy.newProxyInstance(interf.getClassLoader(), interfaces, new CountingProxy<T>(delegate));
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73 return interf.cast(obj);
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74 }
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75
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76 private static ArrayList<CountingProxy> proxies = new ArrayList<CountingProxy>();
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77
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78 static {
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79 if (ENABLED) {
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80 Runtime.getRuntime().addShutdownHook(new Thread() {
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81
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82 @Override
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83 public void run() {
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84 for (CountingProxy proxy : proxies) {
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85 proxy.print();
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86 }
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87 }
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88 });
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89 }
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90 }
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91
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92 protected void print() {
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93 long sum = 0;
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94 for (Map.Entry<Method, Long> entry : calls.entrySet()) {
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95 Method method = entry.getKey();
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96 long count = entry.getValue();
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97 sum += count;
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98 System.out.println(delegate.getClass().getSimpleName() + "." + method.getName() + ": " + count);
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99 }
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100 System.out.println(delegate.getClass().getSimpleName() + " calls: " + sum);
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101 }
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102 }