Examples of org.openbel.framework.common.lock.LockAdviser$Lock

Package org.openbel.framework.common.lock

Examples of org.openbel.framework.common.lock.LockAdviser$Lock

org.openbel.framework.common.lock.LockAdviser
{@link LockAdviser} is responsible for obtaining and releasing {@link Lock file locks} for read and write access. The {@link Lock file locks} are storedon disk at the specified {@link File lock path directory}. This locking mechanism allows for multiple read locks to be obtained, but only one write lock.
Each unique {@link File lock path directory} will have a single instance of{@link LockAdviser lock adviser}. {@link LockAdviser} is thread-safe whichallows multiple threads to obtain and release {@link Lock locks} from thesame {@link LockAdviser lock adviser instance} without concurrency problems.
TODO Document Lockable implementations with LockAdviser-specific details. TODO Review and refactor if necessary. TODO Document fully once you're happy with the design. @author Anthony Bargnesi {@code }

        }
    }


    @Test
    public void testMultipleReadLocks() {
        final LockAdviser lockAdviser = LockAdviser.instance(lockDir);


        final Lock rlock1;
        final Lock rlock2;
        try {
            rlock1 = lockAdviser.obtainReadLock();
            rlock2 = lockAdviser.obtainReadLock();
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
            return;
        }


        assertNotNull(rlock1);
        assertNotNull(rlock2);


        try {
            lockAdviser.releaseReadLock(rlock1);
            lockAdviser.releaseReadLock(rlock2);
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }

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        assertEquals(0, lockDir.listFiles().length);
    }


    @Test
    public void testSingleWriteLock() {
        final LockAdviser lockAdviser = LockAdviser.instance(lockDir);


        final Lock wlock1;
        final Lock wlock2;
        try {
            wlock1 = lockAdviser.obtainWriteLock();
            wlock2 = lockAdviser.obtainWriteLock();
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
            return;
        }


        assertNotNull(wlock1);
        assertNull(wlock2);


        try {
            lockAdviser.releaseWriteLock(wlock1);
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }

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        assertEquals(0, lockDir.listFiles().length);
    }


    @Test
    public void testReleaseLockDeletion() {
        final LockAdviser lockAdviser = LockAdviser.instance(lockDir);


        final Lock rlock;
        try {
            rlock = lockAdviser.obtainReadLock();
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
            return;
        }


        assertNotNull(rlock);


        try {
            lockAdviser.releaseReadLock(rlock);
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }

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        } catch (IOException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }


        final LockAdviser lockAdviser = LockAdviser.instance(lockDir);


        // attempt write lock, which should return null
        final Lock wlock;
        try {
            wlock = lockAdviser.obtainWriteLock();
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
            return;
        }

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        } catch (IOException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }


        final LockAdviser lockAdviser = LockAdviser.instance(lockDir);


        // attempt read lock, which should return null
        final Lock rlock;
        try {
            rlock = lockAdviser.obtainReadLock();
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
            return;
        }

View Full Code Here

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