+ /* Latch tracking if the state history is done building or not */
+ private final CountDownLatch finishedLatch = new CountDownLatch(1);
+
+ private boolean buildCancelled = false;
+ private boolean isDisposed = false;
+
+ /**
+ * New-file constructor. For when you build a state system with a new file,
+ * or if the back-end does not require a file on disk.
+ *
+ * @param backend
+ * Back-end plugin to use
+ */
+ public StateSystem(IStateHistoryBackend backend) {
+ this.backend = backend;
+ this.transState = new TransientState(backend);
+ this.attributeTree = new AttributeTree(this);
+ }
+