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| 1 | +/* | |
| 2 | + * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package sun.tracing; | |
| 27 | + | |
| 28 | +import java.lang.reflect.Method; | |
| 29 | +import java.lang.reflect.InvocationTargetException; | |
| 30 | +import java.util.HashMap; | |
| 31 | +import java.util.HashSet; | |
| 32 | +import java.util.Set; | |
| 33 | + | |
| 34 | +import com.sun.tracing.ProviderFactory; | |
| 35 | +import com.sun.tracing.Provider; | |
| 36 | +import com.sun.tracing.Probe; | |
| 37 | + | |
| 38 | +/** | |
| 39 | + * Factory class to create tracing Providers. | |
| 40 | + * | |
| 41 | + * This factory creates a "multiplex provider", which is a provider that | |
| 42 | + * encapsulates a list of providers and whose probes trigger a corresponding | |
| 43 | + * trigger in each of the encapsulated providers' probes. | |
| 44 | + * | |
| 45 | + * This is used when there are multiple tracing frameworks activated at once. | |
| 46 | + * A user-defined provider gets implementation for each of the activated | |
| 47 | + * frameworks and this multiplex framework is what is ultimately passed | |
| 48 | + * back to the user. All probe triggers are multiplexed to each | |
| 49 | + * active framework. | |
| 50 | + * | |
| 51 | + * @since 1.7 | |
| 52 | + */ | |
| 53 | +public class MultiplexProviderFactory extends ProviderFactory { | |
| 54 | + | |
| 55 | + private Set<ProviderFactory> factories; | |
| 56 | + | |
| 57 | + public MultiplexProviderFactory(Set<ProviderFactory> factories) { | |
| 58 | + this.factories = factories; | |
| 59 | + } | |
| 60 | + | |
| 61 | + public <T extends Provider> T createProvider(Class<T> cls) { | |
| 62 | + HashSet<Provider> providers = new HashSet<Provider>(); | |
| 63 | + for (ProviderFactory factory : factories) { | |
| 64 | + providers.add(factory.createProvider(cls)); | |
| 65 | + } | |
| 66 | + MultiplexProvider provider = new MultiplexProvider(cls, providers); | |
| 67 | + provider.init(); | |
| 68 | + return provider.newProxyInstance(); | |
| 69 | + } | |
| 70 | +} | |
| 71 | + | |
| 72 | +class MultiplexProvider extends ProviderSkeleton { | |
| 73 | + | |
| 74 | + private Set<Provider> providers; | |
| 75 | + | |
| 76 | + protected ProbeSkeleton createProbe(Method m) { | |
| 77 | + return new MultiplexProbe(m, providers); | |
| 78 | + } | |
| 79 | + | |
| 80 | + MultiplexProvider(Class<? extends Provider> type, Set<Provider> providers) { | |
| 81 | + super(type); | |
| 82 | + this.providers = providers; | |
| 83 | + } | |
| 84 | + | |
| 85 | + public void dispose() { | |
| 86 | + for (Provider p : providers) { | |
| 87 | + p.dispose(); | |
| 88 | + } | |
| 89 | + super.dispose(); | |
| 90 | + } | |
| 91 | +} | |
| 92 | + | |
| 93 | +class MultiplexProbe extends ProbeSkeleton { | |
| 94 | + | |
| 95 | + private Set<Probe> probes; | |
| 96 | + | |
| 97 | + MultiplexProbe(Method m, Set<Provider> providers) { | |
| 98 | + super(m.getParameterTypes()); | |
| 99 | + probes = new HashSet<Probe>(); | |
| 100 | + for (Provider p : providers) { | |
| 101 | + Probe probe = p.getProbe(m); | |
| 102 | + if (probe != null) { | |
| 103 | + probes.add(probe); | |
| 104 | + } | |
| 105 | + } | |
| 106 | + } | |
| 107 | + | |
| 108 | + public boolean isEnabled() { | |
| 109 | + for (Probe p : probes) { | |
| 110 | + if (p.isEnabled()) { | |
| 111 | + return true; | |
| 112 | + } | |
| 113 | + } | |
| 114 | + return false; | |
| 115 | + } | |
| 116 | + | |
| 117 | + public void uncheckedTrigger(Object[] args) { | |
| 118 | + for (Probe p : probes) { | |
| 119 | + try { | |
| 120 | + // try the fast path | |
| 121 | + ProbeSkeleton ps = (ProbeSkeleton)p; | |
| 122 | + ps.uncheckedTrigger(args); | |
| 123 | + } catch (ClassCastException e) { | |
| 124 | + // Probe.trigger takes an "Object ..." varargs parameter, | |
| 125 | + // so we can't call it directly. | |
| 126 | + try { | |
| 127 | + Method m = Probe.class.getMethod( | |
| 128 | + "trigger", Class.forName("[java.lang.Object")); | |
| 129 | + m.invoke(p, args); | |
| 130 | + } catch (Exception e1) { | |
| 131 | + assert false; // This shouldn't happen | |
| 132 | + } | |
| 133 | + } | |
| 134 | + } | |
| 135 | + } | |
| 136 | +} | |
| 137 | + | |