com.spotify.futures.CompletableToListenableFutureWrapper.java Source code

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Here is the source code for com.spotify.futures.CompletableToListenableFutureWrapper.java

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/*
 * Copyright (c) 2013-2015 Spotify AB
 *
 * 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 com.spotify.futures;

import com.google.common.util.concurrent.AbstractFuture;
import com.google.common.util.concurrent.ListenableFuture;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
import java.util.function.BiConsumer;

class CompletableToListenableFutureWrapper<V> extends AbstractFuture<V>
        implements ListenableFuture<V>, BiConsumer<V, Throwable> {

    private final CompletionStage<V> future;

    CompletableToListenableFutureWrapper(final CompletionStage<V> future) {
        this.future = future;
        future.whenComplete(this);
    }

    public CompletableFuture<V> unwrap() {
        return future.toCompletableFuture();
    }

    @Override
    public void accept(final V v, final Throwable throwable) {
        if (throwable != null) {
            setException(throwable);
        } else {
            set(v);
        }
    }
}