Example usage for javafx.concurrent Worker getValue

Introduction

In this page you can find the example usage for javafx.concurrent Worker getValue.

Prototype

public V getValue();

Source Link

Document

Specifies the value, or result, of this Worker.

Usage

From source file:Main.java

/**
 * The given consumer will be called once the worker is finished. The result of the worker
 * will be passed to the consumer.// ww  w .  j  av a2s .c o  m
 * @param worker the worker
 * @param consumer the consumer
 * @param <T> the resukt type of the worker
 */
public static <T> void then(Worker<T> worker, Consumer<T> consumer) {
    ReadOnlyBooleanProperty doneProperty = createIsDoneProperty(worker);
    ChangeListener<Boolean> listener = (o, oldValue, newValue) -> {
        if (newValue) {
            consumer.accept(worker.getValue());
        }
    };
    doneProperty.addListener(listener);
}

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From source file:Main.java

/**
 * This methods blocks until the worker is done and returns the result value of the worker.
 * If the worker was canceled an exception will be thrown.
 *
 * @param worker The worker//from  w w  w .  j  a va  2s. com
 * @param <T> result type of the worker
 * @return the result
 * @throws InterruptedException if the worker was canceled
 */
public static <T> T waitFor(Worker<T> worker) throws InterruptedException {
    Lock lock = new ReentrantLock();
    Condition condition = lock.newCondition();
    lock.lock();
    try {
        ReadOnlyBooleanProperty doneProperty = createIsDoneProperty(worker);
        if (doneProperty.get()) {
            return worker.getValue();
        } else {
            doneProperty.addListener(e -> {
                boolean locked = lock.tryLock();
                if (locked) {
                    try {
                        condition.signal();
                    } finally {
                        lock.unlock();
                    }
                } else {
                    throw new RuntimeException("Concurreny Error");
                }
            });
            condition.await();
            return worker.getValue();
        }
    } finally {
        lock.unlock();
    }
}

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