content: package act.util;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 ActFramework
   * %%
   * Licensed 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.
   * #L%
   */
  
  import org.osgl.util.S;
  
  import java.lang.annotation.ElementType;
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  import java.lang.annotation.Target;
  
  /**
   * Mark a class or method to as "asynchronous"
   */
  @Retention(RetentionPolicy.RUNTIME)
  @Target({ElementType.TYPE, ElementType.METHOD})
  public @interface Async {
      /**
       * When a `public void` method has been annotated as `@Async`, ActFramework will
       * enhance the class by adding an new method as a copy of the original method, the name
       * of the new method will be the result of calling the original method.
       */
      class MethodNameTransformer {
  
          /**
           * Returns the new async method's name based on the give name
           * @param methodName the original method name
           * @return the name of the async method that pairs to the original method
           */
          public static String transform(String methodName) {
              return S.concat("__act_", methodName, "_async");
          }
      }
  }
  