persistent

Type Members

1. abstract class CachedFileStorage extends Thread

   

   Mutable storage of immutable xml trees.

   Mutable storage of immutable xml trees. Everything is kept in memory, with a thread periodically checking for changes and writing to file.

   To ensure atomicity, two files are used, filename1 and '$'+filename1. The implementation switches between the two, deleting the older one after a complete dump of the database has been written.

2. abstract class Index[A] extends (Node) ⇒ A

   

   an Index returns some unique key that is part of a node

3. class SetStorage extends CachedFileStorage

   

   A persistent store with set semantics.

   A persistent store with set semantics. This class allows to add and remove trees, but never contains two structurally equal trees.