/*
 * 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.
/**
 * 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>
{
    Predicate<InetAddress> isAlive = new Predicate<InetAddress>()
    {
        public boolean apply(InetAddress endpoint)
        {
            return FailureDetector.instance.isAlive(endpoint);
        }
    };

    
Params:
msg – response received./**
     * @param msg response received.
     */
    void response(MessageIn<T> msg);

    
Returns:
true if this callback is on the read path and its latency should be
given as input to the dynamic snitch./**
     * @return true if this callback is on the read path and its latency should be
     * given as input to the dynamic snitch.
     */
    boolean isLatencyForSnitch();

    default boolean supportsBackPressure()
    {
        return false;
    }
}