Package nl.knaw.dans.layerstore

Interface LayerManager

All Known Implementing Classes:
LayerManagerImpl
public interface LayerManager
Manages Layers. Implementations of this interface should create new layers only through the `newTopLayer` method.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    archive(Layer layer)
    Request for the archiving of the given layer.
    Layer
    getLayer(long id)
    Returns the layer with the given id.
    Layer
    getTopLayer()
    Returns the current top layer.
    List<Long>
    listLayerIds()
    Lists all layer IDs that are currently managed.
    Layer
    newTopLayer()
    Closes the current top layer (if present) and creates a new top layer.

  • Method Details

    • newTopLayer

      Layer newTopLayer() throws IOException
      Closes the current top layer (if present) and creates a new top layer. The old top layer will be scheduled for archiving.
      Throws:
      IOException

    • getTopLayer

      Layer getTopLayer()
      Returns the current top layer.
      Returns:
      the current top layer

    • getLayer

      Layer getLayer(long id)
      Returns the layer with the given id.
      Parameters:
      id - the id of the layer
      Returns:
      the layer

    • archive

      void archive(Layer layer)
      Request for the archiving of the given layer. The operation may be performed asynchronously, so the caller should check the layer's status to determine when the archiving is complete.
      Parameters:
      layer - the layer to archive

    • listLayerIds

      List<Long> listLayerIds() throws IOException
      Lists all layer IDs that are currently managed.
      Returns:
      a list of layer IDs
      Throws:
      IOException - if an I/O error occurs