io.pravega.client.stream.impl.AckFutureImpl.java Source code

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Here is the source code for io.pravega.client.stream.impl.AckFutureImpl.java

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/**
 * Copyright (c) 2017 Dell Inc., or its subsidiaries. All Rights Reserved.
 *
 * 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
 */
package io.pravega.client.stream.impl;

import io.pravega.client.stream.AckFuture;
import com.google.common.util.concurrent.AbstractFuture;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

final class AckFutureImpl extends AbstractFuture<Void> implements AckFuture {

    private final Runnable flush;

    public AckFutureImpl(CompletableFuture<Boolean> result, Runnable flush) {
        this.flush = flush;
        result.handle((bool, exception) -> {
            if (exception != null) {
                this.setException(exception);
            } else {
                if (bool) {
                    this.set(null);
                } else {
                    this.setException(new IllegalStateException("Condition failed for non-conditional write!?"));
                }
            }
            return null;
        });
    }

    @Override
    public Void get(long timeout, TimeUnit unit) throws InterruptedException, TimeoutException, ExecutionException {
        flushIfNeeded();
        return super.get(timeout, unit);
    }

    @Override
    public Void get() throws InterruptedException, ExecutionException {
        flushIfNeeded();
        return super.get();
    }

    private void flushIfNeeded() {
        if (!this.isDone()) {
            flush.run();
        }
    }

}