author | mchung |
Wed, 18 Nov 2009 22:29:16 -0800 | |
changeset 4323 | da93d0c0f2f2 |
parent 491 | a394684ccfe6 |
child 5506 | 202f599c92aa |
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 com.sun.tracing.ProviderFactory; |
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import com.sun.tracing.Provider; |
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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 do nothing. |
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* It is used when no tracing is desired, but Provider instances still |
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* must be generated so that tracing calls in the application continue to |
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* run. |
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* |
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* @since 1.7 |
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*/ |
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public class NullProviderFactory extends ProviderFactory { |
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/** |
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* Creates and returns a Null provider. |
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* |
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* See comments at {@code ProviderSkeleton.createProvider()} for more |
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* details. |
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* |
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* @return a provider whose probe trigger are no-ops. |
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*/ |
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public <T extends Provider> T createProvider(Class<T> cls) { |
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NullProvider provider = new NullProvider(cls); |
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provider.init(); |
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return provider.newProxyInstance(); |
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} |
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} |
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class NullProvider extends ProviderSkeleton { |
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NullProvider(Class<? extends Provider> type) { |
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super(type); |
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} |
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protected ProbeSkeleton createProbe(Method m) { |
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return new NullProbe(m.getParameterTypes()); |
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} |
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} |
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class NullProbe extends ProbeSkeleton { |
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public NullProbe(Class<?>[] parameters) { |
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super(parameters); |
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} |
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public boolean isEnabled() { |
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return false; |
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} |
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public void uncheckedTrigger(Object[] args) { |
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} |
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} |
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