author | kamg |
Thu, 08 May 2008 09:16:03 -0400 | |
changeset 491 | a394684ccfe6 |
parent 406 | bde3a21bcab0 |
child 4323 | da93d0c0f2f2 |
permissions | -rw-r--r-- |
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/* |
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* Copyright 2008 Sun Microsystems, Inc. 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. Sun designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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*/ |
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package sun.tracing; |
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import java.lang.reflect.Method; |
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import java.io.PrintStream; |
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import java.util.HashMap; |
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import java.util.logging.Logger; |
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import com.sun.tracing.ProviderFactory; |
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import com.sun.tracing.Provider; |
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import com.sun.tracing.ProviderName; |
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import com.sun.tracing.Probe; |
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import com.sun.tracing.ProbeName; |
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/** |
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* Factory class to create tracing Providers. |
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* |
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* This factory will create tracing instances that print to a PrintStream |
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* when activated. |
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* |
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* @since 1.7 |
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*/ |
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public class PrintStreamProviderFactory extends ProviderFactory { |
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private PrintStream stream; |
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public PrintStreamProviderFactory(PrintStream stream) { |
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this.stream = stream; |
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} |
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public <T extends Provider> T createProvider(Class<T> cls) { |
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PrintStreamProvider provider = new PrintStreamProvider(cls, stream); |
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try { |
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provider.init(); |
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} catch (Exception e) { |
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// Probably a permission problem (can't get declared members) |
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Logger.getAnonymousLogger().warning( |
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"Could not initialize tracing provider: " + e.getMessage()); |
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} |
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return provider.newProxyInstance(); |
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} |
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} |
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class PrintStreamProvider extends ProviderSkeleton { |
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private PrintStream stream; |
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private String providerName; |
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protected ProbeSkeleton createProbe(Method m) { |
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String probeName = getAnnotationString(m, ProbeName.class, m.getName()); |
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return new PrintStreamProbe(this, probeName, m.getParameterTypes()); |
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} |
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PrintStreamProvider(Class<? extends Provider> type, PrintStream stream) { |
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super(type); |
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this.stream = stream; |
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this.providerName = getProviderName(); |
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} |
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PrintStream getStream() { |
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return stream; |
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} |
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String getName() { |
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return providerName; |
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} |
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} |
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class PrintStreamProbe extends ProbeSkeleton { |
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private PrintStreamProvider provider; |
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private String name; |
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PrintStreamProbe(PrintStreamProvider p, String name, Class<?>[] params) { |
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super(params); |
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this.provider = p; |
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this.name = name; |
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} |
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public boolean isEnabled() { |
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return true; |
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} |
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public void uncheckedTrigger(Object[] args) { |
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StringBuffer sb = new StringBuffer(); |
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sb.append(provider.getName()); |
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sb.append("."); |
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sb.append(name); |
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sb.append("("); |
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boolean first = true; |
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for (Object o : args) { |
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if (first == false) { |
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sb.append(","); |
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} else { |
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first = false; |
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} |
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sb.append(o.toString()); |
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} |
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sb.append(")"); |
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provider.getStream().println(sb.toString()); |
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} |
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bde3a21bcab0
6690122: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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