Example usage for java.util.concurrent.atomic AtomicReferenceFieldUpdater get

Introduction

In this page you can find the example usage for java.util.concurrent.atomic AtomicReferenceFieldUpdater get.

Prototype

public abstract V get(T obj);

Source Link

Document

Returns the current value held in the field of the given object managed by this updater.

Usage

From source file:org.apache.distributedlog.BKLogSegmentWriter.java

void scheduleFlushWithDelayIfNeeded(final Callable<?> callable,
        final AtomicReferenceFieldUpdater<BKLogSegmentWriter, ScheduledFuture> scheduledFutureRefUpdater) {
    final long delayMs = Math.max(0,
            minDelayBetweenImmediateFlushMs - lastTransmit.elapsed(TimeUnit.MILLISECONDS));
    final ScheduledFuture scheduledFuture = scheduledFutureRefUpdater.get(this);
    if ((null == scheduledFuture) || scheduledFuture.isDone()) {
        scheduledFutureRefUpdater.set(this, scheduler.schedule(new Runnable() {
            @Override//from   w w  w.  jav a2  s. com
            public void run() {
                synchronized (this) {
                    scheduledFutureRefUpdater.set(BKLogSegmentWriter.this, null);
                    try {
                        callable.call();

                        // Flush was successful or wasn't needed, the exception should be unset.
                        scheduledFlushExceptionUpdater.set(BKLogSegmentWriter.this, null);
                    } catch (Exception exc) {
                        scheduledFlushExceptionUpdater.set(BKLogSegmentWriter.this, exc);
                        LOG.error("Delayed flush failed", exc);
                    }
                }
            }
        }, delayMs, TimeUnit.MILLISECONDS));
    }
}

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