Package org.apache.jena.dboe.base.page

Class PageBlockMgr<T extends Page>

java.lang.Object
org.apache.jena.dboe.base.page.PageBlockMgr<T>
All Implemented Interfaces:
org.apache.jena.atlas.lib.Closeable
Direct Known Subclasses:
RecordBufferPageMgr
public class PageBlockMgr<T extends Page> extends Object implements org.apache.jena.atlas.lib.Closeable
Engine that wraps from blocks to typed pages.

  • Method Details

    • getBlockMgr

      public BlockMgr getBlockMgr()

    • allocLimit

      public long allocLimit()

    • resetAlloc

      public void resetAlloc(long boundary)

    • create

      public T create(BlockType bType)
      Allocate a new thing

    • getRead

      public T getRead(int id)
      Fetch a block for reading.
      Parameters:
      id - Block to fetch

    • getRead

      public T getRead(int id, int referencingId)
      Fetch a block for reading.
      Parameters:
      id - Block to fetch
      referencingId - Id of block referring to this one. For example, a parent in a tree. May be negative for "none" or "meaningless".

    • getWrite

      public T getWrite(int id)
      Fetch a block for writing.
      Parameters:
      id - Block to fetch

    • getWrite

      public T getWrite(int id, int referencingId)
      Fetch a block for writing.
      Parameters:
      id - Block to fetch
      referencingId - Id of block referring to this one. For example, a parent in a tree. May be -1 for "none" or "meaningless".

    • put

      public void put(T page)

    • write

      public void write(T page)

    • release

      public void release(Page page)

    • free

      public void free(Page page)

    • promoteInPlace

      public void promoteInPlace(Page page)
      Promote a page to be writable in-place (block id does not change, hence page does not change id).

    • promoteDuplicate

      public boolean promoteDuplicate(Page page)
      Promote a page - return 'true' if the block changed (.reset()) will have been called

    • valid

      public boolean valid(int id)

    • dump

      public void dump()

    • startUpdate

      public void startUpdate()
      Signal the start of an update operation

    • finishUpdate

      public void finishUpdate()
      Signal the completion of an update operation

    • startRead

      public void startRead()
      Signal the start of an read operation

    • finishRead

      public void finishRead()
      Signal the completion of an read operation

    • close

      public void close()
      Specified by:
      close in interface org.apache.jena.atlas.lib.Closeable