boolean write(com.ibm.rational.test.lt.kernel.logging.impl.AbstractHistory.TrackedExecutionEvent trackedEvent,
accepts TrackedExecutionEvent object and queues it for writing to the file.
The cache thread will dequeue and write the results of trackedEvent.getEvent().toString() to the file.
Returns true if the event was accepted and queued.
Returns false if either the cache is stopping, stopped, or the level is greater than the cache level.