Examples with AuthorizerLock org.apache.hadoop.ozone.om.multitenant.AuthorizerLock used on opensource projects

Example 1 with AuthorizerLock

use of org.apache.hadoop.ozone.om.multitenant.AuthorizerLock in project ozone by apache.

the class TestAuthorizerLockImpl method testUnlockWriteInOMRequestShouldNotThrowOnFollowerOMs.

@Test
public void testUnlockWriteInOMRequestShouldNotThrowOnFollowerOMs() {
    final AuthorizerLock authorizerLock = new AuthorizerLockImpl();
    // When a follower OM attempts to unlock write in validateAndUpdateCache,
    // even though it hasn't acquired the lock in preExecute,
    // the unlockWriteInOMRequest() method should not throw
    // IllegalMonitorStateException as it should have been handled gracefully.
    authorizerLock.unlockWriteInOMRequest();
}

Example 2 with AuthorizerLock

use of org.apache.hadoop.ozone.om.multitenant.AuthorizerLock in project ozone by apache.

the class TestAuthorizerLockImpl method testStampedLockBehavior.

/**
 * Tests StampedLock behavior.
 */
@Test
@SuppressFBWarnings("IMSE_DONT_CATCH_IMSE")
public void testStampedLockBehavior() throws InterruptedException {
    final AuthorizerLock authorizerLock = new AuthorizerLockImpl();
    // Case 1: A correct stamp can unlock without an issue
    long readLockStamp = authorizerLock.tryReadLock(100);
    authorizerLock.unlockRead(readLockStamp);
    long writeLockStamp = authorizerLock.tryWriteLock(100);
    authorizerLock.unlockWrite(writeLockStamp);
    // Case 1: An incorrect stamp won't be able to unlock, throws IMSE
    readLockStamp = authorizerLock.tryReadLock(100);
    try {
        authorizerLock.unlockRead(readLockStamp - 1L);
        Assert.fail("Should have thrown IllegalMonitorStateException");
    } catch (IllegalMonitorStateException ignored) {
    }
    authorizerLock.unlockRead(readLockStamp);
    writeLockStamp = authorizerLock.tryWriteLock(100);
    try {
        authorizerLock.unlockWrite(writeLockStamp - 1L);
        Assert.fail("Should have thrown IllegalMonitorStateException");
    } catch (IllegalMonitorStateException ignored) {
    }
    authorizerLock.unlockWrite(writeLockStamp);
    // Case 2: Read lock is reentrant; Write lock is exclusive
    long readLockStamp1 = authorizerLock.tryReadLock(100);
    Assert.assertTrue(readLockStamp1 > 0L);
    long readLockStamp2 = authorizerLock.tryReadLock(100);
    Assert.assertTrue(readLockStamp2 > 0L);
    // Can't acquire write lock now, as read lock has been held
    long writeLockStamp1 = authorizerLock.tryWriteLock(100);
    // stamp == 0L means lock failure
    Assert.assertEquals(0L, writeLockStamp1);
    // Release one read lock. Try again. Should fail
    authorizerLock.unlockRead(readLockStamp2);
    writeLockStamp1 = authorizerLock.tryWriteLock(100);
    Assert.assertEquals(0L, writeLockStamp1);
    // Release the other read lock. And again. Should work
    authorizerLock.unlockRead(readLockStamp1);
    writeLockStamp1 = authorizerLock.tryWriteLock(100);
    Assert.assertTrue(writeLockStamp1 > 0L);
    // But a second write lock won't work
    long writeLockStamp2 = authorizerLock.tryWriteLock(100);
    Assert.assertEquals(0L, writeLockStamp2);
    // Read lock also won't work now that write lock is held
    readLockStamp = authorizerLock.tryReadLock(100);
    Assert.assertEquals(0L, readLockStamp);
    authorizerLock.unlockWrite(writeLockStamp1);
}

Example 3 with AuthorizerLock

use of org.apache.hadoop.ozone.om.multitenant.AuthorizerLock in project ozone by apache.

the class TestAuthorizerLockImpl method testLockInOneThreadUnlockInAnother.

@Test
public void testLockInOneThreadUnlockInAnother() {
    final AuthorizerLock authorizerLock = new AuthorizerLockImpl();
    try {
        authorizerLock.tryWriteLockInOMRequest();
        // Spawn another thread to release the lock.
        // Works as long as they share the same AuthorizerLockImpl instance.
        final Thread thread1 = new Thread(authorizerLock::unlockWriteInOMRequest);
        thread1.start();
    } catch (IOException e) {
        Assert.fail("Should not have thrown: " + e.getMessage());
    }
}

Example 4 with AuthorizerLock

use of org.apache.hadoop.ozone.om.multitenant.AuthorizerLock in project ozone by apache.

the class TestAuthorizerLockImpl method testIsWriteLockHeldByCurrentThread.

@Test
public void testIsWriteLockHeldByCurrentThread() throws IOException {
    final AuthorizerLock authorizerLock = new AuthorizerLockImpl();
    Assert.assertFalse(authorizerLock.isWriteLockHeldByCurrentThread());
    // Read lock does not affect the check
    long readLockStamp = authorizerLock.tryReadLockThrowOnTimeout();
    Assert.assertFalse(authorizerLock.isWriteLockHeldByCurrentThread());
    authorizerLock.unlockRead(readLockStamp);
    // Only a write lock acquired through InOMRequest variant affects the check
    authorizerLock.tryWriteLockInOMRequest();
    Assert.assertTrue(authorizerLock.isWriteLockHeldByCurrentThread());
    authorizerLock.unlockWriteInOMRequest();
    // Regular write lock does not affect the check as well
    long writeLockStamp = authorizerLock.tryWriteLockThrowOnTimeout();
    Assert.assertFalse(authorizerLock.isWriteLockHeldByCurrentThread());
    authorizerLock.unlockWrite(writeLockStamp);
}