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safe semaphore.release in finally block

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IgorNB 2019-10-02 19:55:06 +03:00 committed by GitHub
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commit efb631f017
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1 changed files with 5 additions and 2 deletions
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core-java-modules/core-java-concurrency-basic/src/main/java/com/baeldung/concurrent/semaphore/SemaPhoreDemo.java
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@ -11,10 +11,13 @@ public class SemaPhoreDemo {
System.out.println("Available permit : " + semaphore.availablePermits()); System.out.println("Available permit : " + semaphore.availablePermits());
System.out.println("Number of threads waiting to acquire: " + semaphore.getQueueLength()); System.out.println("Number of threads waiting to acquire: " + semaphore.getQueueLength());
if (semaphore.tryAcquire()) { if (semaphore.tryAcquire())
try {
// perform some critical operations // perform some critical operations
} finally {
semaphore.release(); semaphore.release();
} }
}
} }