1 /* |
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2 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package sun.tracing; |
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27 |
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28 import java.lang.reflect.Method; |
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29 import java.io.PrintStream; |
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30 import java.util.HashMap; |
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31 |
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32 import com.sun.tracing.ProviderFactory; |
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33 import com.sun.tracing.Provider; |
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34 import com.sun.tracing.ProviderName; |
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35 import com.sun.tracing.Probe; |
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36 import com.sun.tracing.ProbeName; |
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37 |
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38 /** |
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39 * Factory class to create tracing Providers. |
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40 * |
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41 * This factory will create tracing instances that print to a PrintStream |
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42 * when activated. |
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43 * |
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44 * @since 1.7 |
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45 */ |
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46 public class PrintStreamProviderFactory extends ProviderFactory { |
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47 |
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48 private PrintStream stream; |
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49 |
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50 public PrintStreamProviderFactory(PrintStream stream) { |
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51 this.stream = stream; |
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52 } |
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53 |
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54 public <T extends Provider> T createProvider(Class<T> cls) { |
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55 PrintStreamProvider provider = new PrintStreamProvider(cls, stream); |
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56 provider.init(); |
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57 return provider.newProxyInstance(); |
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58 } |
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59 } |
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60 |
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61 class PrintStreamProvider extends ProviderSkeleton { |
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62 |
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63 private PrintStream stream; |
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64 private String providerName; |
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65 |
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66 protected ProbeSkeleton createProbe(Method m) { |
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67 String probeName = getAnnotationString(m, ProbeName.class, m.getName()); |
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68 return new PrintStreamProbe(this, probeName, m.getParameterTypes()); |
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69 } |
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70 |
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71 PrintStreamProvider(Class<? extends Provider> type, PrintStream stream) { |
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72 super(type); |
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73 this.stream = stream; |
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74 this.providerName = getProviderName(); |
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75 } |
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76 |
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77 PrintStream getStream() { |
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78 return stream; |
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79 } |
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80 |
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81 String getName() { |
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82 return providerName; |
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83 } |
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84 } |
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85 |
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86 class PrintStreamProbe extends ProbeSkeleton { |
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87 |
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88 private PrintStreamProvider provider; |
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89 private String name; |
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90 |
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91 PrintStreamProbe(PrintStreamProvider p, String name, Class<?>[] params) { |
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92 super(params); |
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93 this.provider = p; |
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94 this.name = name; |
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95 } |
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96 |
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97 public boolean isEnabled() { |
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98 return true; |
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99 } |
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100 |
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101 public void uncheckedTrigger(Object[] args) { |
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102 StringBuilder sb = new StringBuilder(); |
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103 sb.append(provider.getName()); |
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104 sb.append("."); |
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105 sb.append(name); |
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106 sb.append("("); |
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107 boolean first = true; |
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108 for (Object o : args) { |
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109 if (first == false) { |
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110 sb.append(","); |
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111 } else { |
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112 first = false; |
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113 } |
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114 sb.append(o.toString()); |
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115 } |
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116 sb.append(")"); |
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117 provider.getStream().println(sb.toString()); |
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118 } |
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119 } |
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120 |
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