Examples of org.apache.commons.lang3.concurrent.TimedSemaphore.acquire()

Package org.apache.commons.lang3.concurrent

Class org.apache.commons.lang3.concurrent.TimedSemaphore

Examples of org.apache.commons.lang3.concurrent.TimedSemaphore.acquire()

org.apache.commons.lang3.concurrent.TimedSemaphore.acquire()
Tries to acquire a permit from this semaphore. This method will block if the limit for the current period has already been reached. If {@link #shutdown()} has already been invoked, calling this method willcause an exception. The very first call of this method starts the timer task which monitors the time period set for this {@code TimedSemaphore}. From now on the semaphore is active. @throws InterruptedException if the thread gets interrupted @throws IllegalStateException if this semaphore is already shut down

     */
    @Test(expected = IllegalStateException.class)
    public void testPassAfterShutdown() throws InterruptedException {
        TimedSemaphore semaphore = new TimedSemaphore(PERIOD, UNIT, LIMIT);
        semaphore.shutdown();
        semaphore.acquire();
    }


    /**
     * Tests a bigger number of invocations that span multiple periods. The
     * period is set to a very short time. A background thread calls the

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        ScheduledFuture<?> future = EasyMock.createMock(ScheduledFuture.class);
        prepareStartTimer(service, future);
        EasyMock.replay(service, future);
        TimedSemaphore semaphore = new TimedSemaphore(service, PERIOD, UNIT,
                LIMIT);
        semaphore.acquire();
        semaphore.endOfPeriod();
        assertEquals("Wrong average (1)", 1.0, semaphore
                .getAverageCallsPerPeriod(), .005);
        semaphore.acquire();
        semaphore.acquire();

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                LIMIT);
        semaphore.acquire();
        semaphore.endOfPeriod();
        assertEquals("Wrong average (1)", 1.0, semaphore
                .getAverageCallsPerPeriod(), .005);
        semaphore.acquire();
        semaphore.acquire();
        semaphore.endOfPeriod();
        assertEquals("Wrong average (2)", 1.5, semaphore
                .getAverageCallsPerPeriod(), .005);
        EasyMock.verify(service, future);

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        semaphore.acquire();
        semaphore.endOfPeriod();
        assertEquals("Wrong average (1)", 1.0, semaphore
                .getAverageCallsPerPeriod(), .005);
        semaphore.acquire();
        semaphore.acquire();
        semaphore.endOfPeriod();
        assertEquals("Wrong average (2)", 1.5, semaphore
                .getAverageCallsPerPeriod(), .005);
        EasyMock.verify(service, future);
    }

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        TimedSemaphore semaphore = new TimedSemaphore(service, PERIOD, UNIT,
                LIMIT);
        for (int i = 0; i < LIMIT; i++) {
            assertEquals("Wrong available count at " + i, LIMIT - i, semaphore
                    .getAvailablePermits());
            semaphore.acquire();
        }
        semaphore.endOfPeriod();
        assertEquals("Wrong available count in new period", LIMIT, semaphore
                .getAvailablePermits());
        EasyMock.verify(service, future);

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