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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 | |||