content: /*
   * Copyright (c) OSGi Alliance 2015. All Rights Reserved.
   *
   * 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.
   */
  package org.osgi.service.async.delegate;
  
  import java.lang.reflect.Method;
  
  import org.osgi.annotation.versioning.ConsumerType;
  import org.osgi.util.promise.Promise;
  
  /**
   * The AsyncDelegate, as defined in OSGi RFC 204
   * https://github.com/osgi/design/tree/master/rfcs/rfc0206
   */
  @ConsumerType
  public interface AsyncDelegate {
  	/**
  	 * Asynchronously call a method
  	 * 
  	 * @param m the method
  	 * @param args the arguments
  	 * 
  	 * @return A promise, or <code>null</code> if the method is not supported
       *
  	 * @throws Exception
       */
  	Promise<?> async(Method m, Object[] args) throws Exception;
  
  	/**
       * Asynchronously call a method
  	 * 
       * @param m the method
       * @param args the arguments
  	 * 
  	 * @return <code>true<code> if accepted, or <code>false</code> otherwise.
  	 * @throws Exception 
  	 */
  	boolean execute(Method m, Object[] args) throws Exception;
  }
  