| /* |
| * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.tracing; |
| |
| import java.lang.reflect.Method; |
| import java.lang.reflect.InvocationTargetException; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import com.sun.tracing.ProviderFactory; |
| import com.sun.tracing.Provider; |
| import com.sun.tracing.Probe; |
| |
| /** |
| * Factory class to create tracing Providers. |
| * |
| * This factory creates a "multiplex provider", which is a provider that |
| * encapsulates a list of providers and whose probes trigger a corresponding |
| * trigger in each of the encapsulated providers' probes. |
| * |
| * This is used when there are multiple tracing frameworks activated at once. |
| * A user-defined provider gets implementation for each of the activated |
| * frameworks and this multiplex framework is what is ultimately passed |
| * back to the user. All probe triggers are multiplexed to each |
| * active framework. |
| * |
| * @since 1.7 |
| */ |
| public class MultiplexProviderFactory extends ProviderFactory { |
| |
| private Set<ProviderFactory> factories; |
| |
| public MultiplexProviderFactory(Set<ProviderFactory> factories) { |
| this.factories = factories; |
| } |
| |
| public <T extends Provider> T createProvider(Class<T> cls) { |
| HashSet<Provider> providers = new HashSet<Provider>(); |
| for (ProviderFactory factory : factories) { |
| providers.add(factory.createProvider(cls)); |
| } |
| MultiplexProvider provider = new MultiplexProvider(cls, providers); |
| provider.init(); |
| return provider.newProxyInstance(); |
| } |
| } |
| |
| class MultiplexProvider extends ProviderSkeleton { |
| |
| private Set<Provider> providers; |
| |
| protected ProbeSkeleton createProbe(Method m) { |
| return new MultiplexProbe(m, providers); |
| } |
| |
| MultiplexProvider(Class<? extends Provider> type, Set<Provider> providers) { |
| super(type); |
| this.providers = providers; |
| } |
| |
| public void dispose() { |
| for (Provider p : providers) { |
| p.dispose(); |
| } |
| super.dispose(); |
| } |
| } |
| |
| class MultiplexProbe extends ProbeSkeleton { |
| |
| private Set<Probe> probes; |
| |
| MultiplexProbe(Method m, Set<Provider> providers) { |
| super(m.getParameterTypes()); |
| probes = new HashSet<Probe>(); |
| for (Provider p : providers) { |
| Probe probe = p.getProbe(m); |
| if (probe != null) { |
| probes.add(probe); |
| } |
| } |
| } |
| |
| public boolean isEnabled() { |
| for (Probe p : probes) { |
| if (p.isEnabled()) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public void uncheckedTrigger(Object[] args) { |
| for (Probe p : probes) { |
| try { |
| // try the fast path |
| ProbeSkeleton ps = (ProbeSkeleton)p; |
| ps.uncheckedTrigger(args); |
| } catch (ClassCastException e) { |
| // Probe.trigger takes an "Object ..." varargs parameter, |
| // so we can't call it directly. |
| try { |
| Method m = Probe.class.getMethod( |
| "trigger", Class.forName("[java.lang.Object")); |
| m.invoke(p, args); |
| } catch (Exception e1) { |
| assert false; // This shouldn't happen |
| } |
| } |
| } |
| } |
| } |
| |