| /* |
| * 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 java.lang.annotation.Annotation; |
| import lombok.AllArgsConstructor; |
| import lombok.Getter; |
| import org.apache.skywalking.oap.server.core.Const; |
| import org.apache.skywalking.oap.server.core.analysis.meter.function.MeterFunction; |
| import org.apache.skywalking.oap.server.core.analysis.metrics.annotation.MetricsFunction; |
| |
| @AllArgsConstructor |
| @Getter |
| public enum FunctionCategory { |
| METER("meter", MeterFunction.class), |
| METRICS("metrics", MetricsFunction.class); |
| private final String name; |
| private final Class<? extends Annotation> annotationClass; |
| |
| /** |
| * The unique function name pattern is {function category}-{function name}. |
| */ |
| public static String uniqueFunctionName(final Class<?> aClass) { |
| Annotation annotation = doGetAnnotation(aClass, MeterFunction.class); |
| if (annotation != null) { |
| return (METER.getName() + Const.LINE + ((MeterFunction) annotation).functionName()).toLowerCase(); |
| } |
| annotation = doGetAnnotation(aClass, MetricsFunction.class); |
| if (annotation != null) { |
| return (METRICS.getName() + Const.LINE + ((MetricsFunction) annotation).functionName()).toLowerCase(); |
| } |
| return ""; |
| } |
| |
| private static Annotation doGetAnnotation(Class<?> clazz, Class<? extends Annotation> annotationClass) { |
| if (clazz.equals(Object.class)) { |
| return null; |
| } |
| Annotation[] annotations = clazz.getAnnotations(); |
| for (final Annotation annotation : annotations) { |
| if (annotation.annotationType().equals(annotationClass)) { |
| return annotation; |
| } |
| } |
| return doGetAnnotation(clazz.getSuperclass(), annotationClass); |
| } |
| } |