Package org.apache.derby.impl.store.raw.data

Class PageCreationArgs

  • class PageCreationArgs
extends java.lang.Object
    This class holds information that is passed to CachedPage.createPage() and used when a page object (either a StoredPage or an AllocPage) is created.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      (package private) int containerInfoSize
      Size of the container information stored in the AllocPage.
      (package private) int formatId
      Tells which type of page to create.
      (package private) int minimumRecordSize
      Minimum space to reserve for record portion length of row.
      (package private) int pageSize
      The size of the page in bytes.
      (package private) int spareSpace
      % of page to keep free for updates.
      (package private) int syncFlag
      Tells whether writes to this page should be synced.

    • Constructor Summary

      Constructors 
      Constructor Description
      PageCreationArgs​(int formatId, int syncFlag, int pageSize, int spareSpace, int minimumRecordSize, int containerInfoSize)  

    • Method Summary

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • formatId

        final int formatId
        Tells which type of page to create. Either StoredPage.FORMAT_NUMBER or AllocPage.FORMAT_NUMBER.

      • syncFlag

        final int syncFlag
        Tells whether writes to this page should be synced. Should be CachedPage.WRITE_SYNC or CachedPage.WRITE_NO_SYNC, or 0 if the page is in a temporary container.

      • pageSize

        final int pageSize
        The size of the page in bytes.

      • spareSpace

        final int spareSpace
        % of page to keep free for updates. Not used for AllocPage.

      • minimumRecordSize

        final int minimumRecordSize
        Minimum space to reserve for record portion length of row.

      • containerInfoSize

        final int containerInfoSize
        Size of the container information stored in the AllocPage.

    • Constructor Detail

      • PageCreationArgs

        PageCreationArgs​(int formatId,
                 int syncFlag,
                 int pageSize,
                 int spareSpace,
                 int minimumRecordSize,
                 int containerInfoSize)