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annotate src/goodjava/lucene/logging/SemaphoreLock.java @ 1710:fc224a1bb6ea

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add blog/serve_and_backup.luan
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 10 Jul 2022 17:52:19 -0600
parents 634f6765830e
children
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634f6765830e use goodjava/lucene/logging
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1 package goodjava.lucene.logging;
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3 import java.util.concurrent.Semaphore;
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4 import java.util.concurrent.TimeUnit;
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7 public final class SemaphoreLock {
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8 private final Semaphore semaphore = new Semaphore(1);
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10 public void unlock() {
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11 semaphore.release();
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12 }
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14 public boolean isLocked() {
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15 return semaphore.availablePermits() == 0;
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16 }
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18 public boolean tryLock(long time,TimeUnit unit) throws InterruptedException {
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19 return semaphore.tryAcquire(time,unit);
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20 }
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21 }