Package db

Class Database.DBBufferFileManager

java.lang.Object
db.Database.DBBufferFileManager
All Implemented Interfaces:
BufferFileManager
Enclosing class:
Database

protected class Database.DBBufferFileManager extends Object implements BufferFileManager
  • Constructor Details

    • DBBufferFileManager

      protected DBBufferFileManager()
  • Method Details

    • getCurrentVersion

      public int getCurrentVersion()
      Description copied from interface: BufferFileManager
      Returns the current version. A value of 0 indicates that the first buffer file has not yet been created.
      Specified by:
      getCurrentVersion in interface BufferFileManager
    • getBufferFile

      public File getBufferFile(int version)
      Description copied from interface: BufferFileManager
      Get the buffer file corresponding to a specified version.
      Specified by:
      getBufferFile in interface BufferFileManager
      Parameters:
      version -
      Returns:
      database buffer file.
    • getVersionFile

      public File getVersionFile(int version)
      Description copied from interface: BufferFileManager
      Get the buffer version file corresponding to a specified version. This file contains data corresponding to a specified buffer file version and those buffers which have been modified in the next version (version+1). May return null if version files not used.
      Specified by:
      getVersionFile in interface BufferFileManager
      Parameters:
      version - version of the original buffer file to be reconstructed
      Returns:
      buffer version file.
    • getChangeMapFile

      public File getChangeMapFile()
      Description copied from interface: BufferFileManager
      Returns the change map file corresponding to this DB if one is defined. This file tracks all buffers which have been modified during a save operation.
      Specified by:
      getChangeMapFile in interface BufferFileManager
    • getChangeDataFile

      public File getChangeDataFile(int version)
      Description copied from interface: BufferFileManager
      Get the change data buffer file corresponding to the specified version. This file contains application specific changes which were made going from the specified version to the next version (version+1). May return null if change data files are not used.
      Specified by:
      getChangeDataFile in interface BufferFileManager
      Parameters:
      version - version of the original buffer file which was changed
      Returns:
      change data buffer file.
    • versionCreated

      public void versionCreated(int version, String comment, long checkinId) throws FileNotFoundException
      Description copied from interface: BufferFileManager
      Callback for when a buffer file is created.
      Specified by:
      versionCreated in interface BufferFileManager
      Parameters:
      version -
      comment -
      checkinId - associated checkinId
      Throws:
      FileNotFoundException - database files not found
    • updateEnded

      public void updateEnded(long checkinId)
      Description copied from interface: BufferFileManager
      Callback indicating that a buffer file update has ended without creating a new version. This method terminates the checkin session.
      Specified by:
      updateEnded in interface BufferFileManager
      Parameters:
      checkinId - associated checkinId