/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2012 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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 io.undertow.util;

import java.io.IOException;

import org.xnio.IoFuture;

/**
 * @author Stuart Douglas
 */
public abstract class ConcreteNotifier<T, A, X> implements IoFuture.Notifier<T, A> {

    private final ConcreteIoFuture<X> future;

    public ConcreteNotifier(final ConcreteIoFuture<X> future) {
        this.future = future;
    }

    @Override
    public final void notify(final IoFuture<? extends T> ioFuture, final A attachment) {
        if (ioFuture.getStatus() == IoFuture.Status.DONE) {
                try {
                    handleNotification(ioFuture.get(), attachment, future);
                } catch (IOException e) {
                    future.setException(e);
                }
        } else {
            future.setException(ioFuture.getException());
        }
    }

    public abstract void handleNotification(T value, A attachment, ConcreteIoFuture<X> future);
}

Add notifier utility class