138 lines
4.4 KiB
Java
138 lines
4.4 KiB
Java
/*
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* Copyright (c) 2008, Oracle and/or its affiliates. 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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* 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.lang.reflect.InvocationTargetException;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Set;
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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.Probe;
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/**
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* Factory class to create tracing Providers.
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*
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* This factory creates a "multiplex provider", which is a provider that
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* encapsulates a list of providers and whose probes trigger a corresponding
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* trigger in each of the encapsulated providers' probes.
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*
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* This is used when there are multiple tracing frameworks activated at once.
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* A user-defined provider gets implementation for each of the activated
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* frameworks and this multiplex framework is what is ultimately passed
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* back to the user. All probe triggers are multiplexed to each
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* active framework.
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*
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* @since 1.7
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*/
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public class MultiplexProviderFactory extends ProviderFactory {
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private Set<ProviderFactory> factories;
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public MultiplexProviderFactory(Set<ProviderFactory> factories) {
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this.factories = factories;
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}
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public <T extends Provider> T createProvider(Class<T> cls) {
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HashSet<Provider> providers = new HashSet<Provider>();
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for (ProviderFactory factory : factories) {
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providers.add(factory.createProvider(cls));
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}
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MultiplexProvider provider = new MultiplexProvider(cls, providers);
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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 MultiplexProvider extends ProviderSkeleton {
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private Set<Provider> providers;
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protected ProbeSkeleton createProbe(Method m) {
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return new MultiplexProbe(m, providers);
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}
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MultiplexProvider(Class<? extends Provider> type, Set<Provider> providers) {
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super(type);
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this.providers = providers;
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}
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public void dispose() {
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for (Provider p : providers) {
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p.dispose();
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}
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super.dispose();
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}
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}
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class MultiplexProbe extends ProbeSkeleton {
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private Set<Probe> probes;
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MultiplexProbe(Method m, Set<Provider> providers) {
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super(m.getParameterTypes());
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probes = new HashSet<Probe>();
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for (Provider p : providers) {
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Probe probe = p.getProbe(m);
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if (probe != null) {
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probes.add(probe);
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}
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}
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}
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public boolean isEnabled() {
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for (Probe p : probes) {
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if (p.isEnabled()) {
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return true;
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}
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}
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return false;
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}
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public void uncheckedTrigger(Object[] args) {
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for (Probe p : probes) {
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try {
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// try the fast path
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ProbeSkeleton ps = (ProbeSkeleton)p;
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ps.uncheckedTrigger(args);
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} catch (ClassCastException e) {
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// Probe.trigger takes an "Object ..." varargs parameter,
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// so we can't call it directly.
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try {
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Method m = Probe.class.getMethod(
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"trigger", Class.forName("[java.lang.Object"));
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m.invoke(p, args);
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} catch (Exception e1) {
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assert false; // This shouldn't happen
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}
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}
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}
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}
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}
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