Examples of com.volantis.mcs.repository.lock.Lock.acquire()

com.volantis.mcs.repository.lock.Lock.acquire()

Acquire the lock.

This will attempt to acquire the lock on behalf of the specified principal. One of three things will occur.

The lock was successfully acquired for the principal in which case this method returns true and the owner is set to this principal.
The lock was acquired by another principal in which case this method returns false and the owner is set to the other principal.
An error occurred while attempting to access the database. In this case an exception is thrown and the state of the lock is not changed.

@param principal The principal that wants to own the lock. @return True if the lock was acquired for the specified principal, falseif it was not. @throws IllegalStateException if the lock is already locked.

            String principalName = args[1];
            Principal principal = new JDBCPrincipal(principalName);
            String resource = args[2];


            Lock lock = manager.getLock(resource);
            lock.acquire(principal);
        } else if (command.equals("unlock")) {


            if (args.length != 3) {
                usage("lock <principal> <resource>");
            }


        // =====================================================================
        //   Test Expectations
        // =====================================================================
        Lock lock = new JDBCLock(lockManagerMock, RESOURCE_ID, null, -1);
        boolean locked = lock.acquire(fred);
        assertTrue("Locked", locked);


        assertEquals("Principal unexpected", fred, lock.getOwner());
        assertEquals("Acquisition time incorrect", 12345L,
                lock.getAcquisitionTime());


        // =====================================================================
        //   Test Expectations
        // =====================================================================
        Lock lock = new JDBCLock(lockManagerMock, RESOURCE_ID, null, -1);
        boolean locked = lock.acquire(fred);
        assertFalse("Unlocked", locked);


        assertEquals("Principal unexpected", wilma, lock.getOwner());
        assertEquals("Acquisition time incorrect", 54321L,
                lock.getAcquisitionTime());

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.