AsyncDelegate.java

/*
 * 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;
}