| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.openjpa.instrumentation; |
| |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.apache.openjpa.conf.OpenJPAConfiguration; |
| import org.apache.openjpa.lib.conf.PluginListValue; |
| import org.apache.openjpa.lib.instrumentation.InstrumentationLevel; |
| import org.apache.openjpa.lib.instrumentation.InstrumentationProvider; |
| |
| /** |
| * An implementation of an instrumentation manager. |
| */ |
| public class InstrumentationManagerImpl implements InstrumentationManager { |
| |
| public Set<InstrumentationProvider> _providers = |
| Collections.synchronizedSet(new HashSet<>()); |
| |
| private boolean _closed = false; |
| |
| /** |
| * Initializes all providers defined for the specified configuration. |
| */ |
| @Override |
| public void initialize(OpenJPAConfiguration conf, PluginListValue pluginVal) { |
| InstrumentationProvider[] providers = |
| (InstrumentationProvider[])pluginVal.instantiate(InstrumentationProvider.class, conf); |
| _providers.addAll(Arrays.asList(providers)); |
| } |
| |
| /** |
| * Make a provider managed. This will bind its instrumentation to |
| * InstrumentationLevel type events (factory create/close, broker create/close). |
| */ |
| @Override |
| public void manageProvider(InstrumentationProvider provider) { |
| _providers.add(provider); |
| } |
| |
| /** |
| * Returns all providers as an unmodifiable set |
| */ |
| @Override |
| public Set<InstrumentationProvider> getProviders() { |
| return Collections.unmodifiableSet(_providers); |
| } |
| |
| /** |
| * Starts all providers at a specific level and context |
| */ |
| @Override |
| public void start(InstrumentationLevel level, Object context) { |
| if (_providers == null || _providers.size() == 0) { |
| return; |
| } |
| for (InstrumentationProvider provider : _providers) { |
| if (!provider.isStarted()) { |
| provider.start(); |
| } |
| provider.startInstruments(level, context); |
| } |
| } |
| |
| /** |
| * Stops all providers at a specific level and context |
| */ |
| @Override |
| public void stop(InstrumentationLevel level, Object context) { |
| if (_providers == null || _providers.size() == 0) { |
| return; |
| } |
| for (InstrumentationProvider provider : _providers) { |
| provider.stopInstruments(level, context); |
| } |
| } |
| |
| /** |
| * Stops all providers |
| */ |
| @Override |
| public void close() throws Exception { |
| if (_closed) { |
| return; |
| } |
| for (InstrumentationProvider provider : _providers) { |
| provider.stop(); |
| } |
| _closed = true; |
| } |
| } |