| /* |
| * 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.cassandra.net; |
| |
| import java.net.InetAddress; |
| |
| import com.google.common.base.Predicate; |
| |
| import org.apache.cassandra.gms.FailureDetector; |
| |
| /** |
| * implementors of IAsyncCallback need to make sure that any public methods |
| * are threadsafe with respect to response() being called from the message |
| * service. In particular, if any shared state is referenced, making |
| * response alone synchronized will not suffice. |
| */ |
| public interface IAsyncCallback<T> |
| { |
| public static Predicate<InetAddress> isAlive = new Predicate<InetAddress>() |
| { |
| public boolean apply(InetAddress endpoint) |
| { |
| return FailureDetector.instance.isAlive(endpoint); |
| } |
| }; |
| |
| /** |
| * @param msg response received. |
| */ |
| public void response(MessageIn<T> msg); |
| |
| /** |
| * @return true if this callback is on the read path and its latency should be |
| * given as input to the dynamic snitch. |
| */ |
| boolean isLatencyForSnitch(); |
| } |