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/*
 * Copyright 2008-2009 the original author or authors.
 *
 * 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 net.hasor.cobble.concurrent.future;
/**
 * Basic implementation of the {@link java.util.concurrent.Future} interface. BasicFuture
 * can be put into a completed state by invoking any of the following methods:
 * {@link #cancel()}, {@link #failed(Throwable)}, or {@link #completed(Object)}.
 *
 * @param  the future result type of an asynchronous operation.
 */
public interface Future extends java.util.concurrent.Future {

    /** 不阻塞，不抛异常，获取结果如果 completed 则返回 result，如果 failed 或 cancel 则返回空。*/
    T getResult();

    /** 阻塞等待直到成功或失败 */
    default void await() {
        try {
            this.get();
        } catch (Exception ignored) {
        }
    }

    Throwable getCause();

    boolean completed(final T result);

    boolean failed(final Throwable exception);

    @Override
    boolean cancel(final boolean mayInterruptIfRunning);

    boolean cancel();

    Future onCompleted(FutureListener> listener);

    Future onFailed(FutureListener> listener);

    Future onCancel(FutureListener> listener);

    Future onFinal(FutureListener> listener);
}