Class FSInitializer

    • Constructor Detail

      • FSInitializer

        public FSInitializer​(File storeDirectory,
                             File indexDirectory)
    • Method Detail

      • createNew

        public boolean createNew()
        Description copied from interface: Initializable
        Creates a completely new instance. Fails if an instance already exists. In that case, call destroy first. For instance, this might create all file system entries or drop then recreate all tables in an SQL database. Compare this with init which might delete any entries in a file store or SQL table.
        Returns:
      • isCreated

        public boolean isCreated()
        Description copied from interface: Initializable
        (Optional) Returns true if the object in question has been created. If this cannot be determined then the call should throw an exception.
        Specified by:
        isCreated in interface Initializable
        Overrides:
        isCreated in class StoreInitializer
        Returns:
      • isInitialized

        public boolean isInitialized()
        Description copied from interface: Initializable
        (Optional) Returns true if the object in question has been initialized. If this cannot be determined this call should throw an exception.
        Specified by:
        isInitialized in interface Initializable
        Overrides:
        isInitialized in class StoreInitializer
        Returns:
      • destroy

        public boolean destroy()
        Description copied from interface: Initializable
        Destroy the object completely. Returns true if the object existed before destroy was called. Further calls to this object must fail after this invocation.
      • clearEntries

        protected void clearEntries()
        Clears out any and all entries in the storage/index directories.
      • init

        public boolean init()
        Description copied from interface: Initializable
        Initialize an existing object. This throws an exception if the object does not exist. The state after this call is exactly as if the system were created for the first time. Calls to the object before invocation have no guarantee of success.
        Returns:
        Returns True if the operation succeeds.