Module org.apache.jena.tdb
Package org.apache.jena.tdb1.base.block

Class BlockMgrFileAccess

java.lang.Object
org.apache.jena.tdb1.base.block.BlockMgrBase
org.apache.jena.tdb1.base.block.BlockMgrFileAccess
All Implemented Interfaces:
org.apache.jena.atlas.lib.Closeable, org.apache.jena.atlas.lib.Sync, BlockMgr
public final class BlockMgrFileAccess extends BlockMgrBase
Block manager that maps from the FileAccess layer to a BlockMgr. Add free block management (but we should layer with BlockMgrFreeChain)

  • Method Details

    • promote

      public Block promote(Block block)
      Description copied from interface: BlockMgr
      Promote to writeable : it's OK to promote an already writeable block

    • getReadIterator

      public Block getReadIterator(long id)
      Description copied from interface: BlockMgr
      Fetch a block, use for read only in an iterator

    • getRead

      public Block getRead(long id)
      Description copied from interface: BlockMgr
      Fetch a block, use for read only

    • getWrite

      public Block getWrite(long id)
      Description copied from interface: BlockMgr
      Fetch a block, use for write and read - only inside "update"

    • release

      public void release(Block block)
      Description copied from interface: BlockMgr
      Release a block, unmodified.

    • write

      public void write(Block block)
      Description copied from interface: BlockMgr
      Write a block back - it still needs releasing.

    • overwrite

      public void overwrite(Block block)
      Description copied from interface: BlockMgr
      Replace the contents of a block slot with new contents. Block does not need releasing. The write() operation may not do real work if the block is mapped - this operation really does replace the contents with the new contents.

    • free

      public void free(Block block)
      Description copied from interface: BlockMgr
      Announce a block is no longer in use (i.e it's now freed)

    • valid

      public boolean valid(int id)
      Description copied from interface: BlockMgr
      Is this a valid block id? (may be a free block)

    • sync

      public void sync()
      Description copied from interface: BlockMgr
      Sync the block manager

    • syncForce

      public void syncForce()
      Description copied from interface: BlockMgr
      Sync the block manager : system operation to ensure sync() is passed down

    • isClosed

      public boolean isClosed()
      Description copied from interface: BlockMgr
      Is this block manager still usable? Closed block managers can not perform any operations except this one.

    • close

      public void close()
      Description copied from interface: BlockMgr
      Close the block manager

    • isEmpty

      public boolean isEmpty()
      Description copied from interface: BlockMgr
      Answer whether there are any blocks in the collection being managed

    • toString

      public String toString()
      Overrides:
      toString in class Object