content: /*
   *
   * 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 com.alibaba.cloudapp.api.observabilities;
  
  import java.lang.annotation.ElementType;
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  import java.lang.annotation.Target;
  
  /**
   * Used to annotate classes that represent a collection of metrics.
   */
  @Target(ElementType.TYPE)
  @Retention(RetentionPolicy.RUNTIME)
  public @interface MetricCollection {
      /**
       * Define the name of the collection, which will be set as an additional
       * attribute on the metric.
       * Suggestion is that an application use the same service-name.
       * @return The name of the metric collection.
       */
      String serviceName() default "";
      
      /**
       * Defined the scope name of the metric collection is associated with.
       * The suggestion is to set the scope name to the package name or fully
       * qualified class name.
       * @return The scope name of the metric collection.
       */
      String scopeName() default "";
      
      /**
       * Defined the scope version of the metric collection is associated with.
       * The suggestion is to set the scope version to the library version.
       * @return The scope version of the metric collection.
       */
      String scopeVersion() default "";
  }
  