| /* |
| * 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.skywalking.oap.server.core.analysis; |
| |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.reflect.ClassPath; |
| import java.io.IOException; |
| import java.lang.reflect.Modifier; |
| import java.lang.reflect.ParameterizedType; |
| import java.lang.reflect.Type; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import org.apache.skywalking.oap.server.core.UnexpectedException; |
| import org.apache.skywalking.oap.server.core.source.ISource; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class DispatcherManager implements DispatcherDetectorListener { |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(DispatcherManager.class); |
| |
| private Map<Integer, List<SourceDispatcher<ISource>>> dispatcherMap; |
| |
| public DispatcherManager() { |
| this.dispatcherMap = new HashMap<>(); |
| } |
| |
| public void forward(ISource source) { |
| if (source == null) { |
| return; |
| } |
| |
| List<SourceDispatcher<ISource>> dispatchers = dispatcherMap.get(source.scope()); |
| |
| /** |
| * Dispatcher is only generated by oal script analysis result. |
| * So these will/could be possible, the given source doesn't have the dispatcher, |
| * when the receiver is open, and oal script doesn't ask for analysis. |
| */ |
| if (dispatchers != null) { |
| source.prepare(); |
| for (SourceDispatcher<ISource> dispatcher : dispatchers) { |
| dispatcher.dispatch(source); |
| } |
| } |
| } |
| |
| /** |
| * Scan all classes under `org.apache.skywalking` package, |
| * <p> |
| * If it implement {@link org.apache.skywalking.oap.server.core.analysis.SourceDispatcher}, then, it will be added |
| * into this DispatcherManager based on the Source definition. |
| */ |
| public void scan() throws IOException, IllegalAccessException, InstantiationException { |
| ClassPath classpath = ClassPath.from(this.getClass().getClassLoader()); |
| ImmutableSet<ClassPath.ClassInfo> classes = classpath.getTopLevelClassesRecursive("org.apache.skywalking"); |
| for (ClassPath.ClassInfo classInfo : classes) { |
| Class<?> aClass = classInfo.load(); |
| |
| addIfAsSourceDispatcher(aClass); |
| } |
| } |
| |
| @Override |
| public void addIfAsSourceDispatcher(Class aClass) throws IllegalAccessException, InstantiationException { |
| if (!aClass.isInterface() && !Modifier.isAbstract( |
| aClass.getModifiers()) && SourceDispatcher.class.isAssignableFrom(aClass)) { |
| Type[] genericInterfaces = aClass.getGenericInterfaces(); |
| for (Type genericInterface : genericInterfaces) { |
| ParameterizedType anInterface = (ParameterizedType) genericInterface; |
| if (anInterface.getRawType().getTypeName().equals(SourceDispatcher.class.getName())) { |
| Type[] arguments = anInterface.getActualTypeArguments(); |
| |
| if (arguments.length != 1) { |
| throw new UnexpectedException("unexpected type argument number, class " + aClass.getName()); |
| } |
| Type argument = arguments[0]; |
| |
| Object source = ((Class) argument).newInstance(); |
| |
| if (!ISource.class.isAssignableFrom(source.getClass())) { |
| throw new UnexpectedException( |
| "unexpected type argument of class " + aClass.getName() + ", should be `org.apache.skywalking.oap.server.core.source.Source`. "); |
| } |
| |
| ISource dispatcherSource = (ISource) source; |
| SourceDispatcher dispatcher = (SourceDispatcher) aClass.newInstance(); |
| |
| int scopeId = dispatcherSource.scope(); |
| |
| List<SourceDispatcher<ISource>> dispatchers = this.dispatcherMap.get(scopeId); |
| if (dispatchers == null) { |
| dispatchers = new ArrayList<>(); |
| this.dispatcherMap.put(scopeId, dispatchers); |
| } |
| |
| dispatchers.add(dispatcher); |
| |
| LOGGER.info("Dispatcher {} is added into DefaultScopeDefine {}.", dispatcher.getClass() |
| .getName(), scopeId); |
| } |
| } |
| } |
| } |
| } |