Package org.apache.ignite.internal.pagemem

Interface PageIdAllocator

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static byte FLAG_AUX
      Flag for an internal structure page.
      static byte FLAG_DATA
      Flag for a Data page.
      static byte FLAG_IDX
      Flag for an index page.
      static int INDEX_PARTITION
      Special partition reserved for index space.
      static int MAX_PARTITION_ID
      Max partition ID that can be used by affinity.
      static long META_PAGE_ID
      Cache group meta page id.

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      long allocatePage​(int grpId, int partId, byte flags)
      Allocates a page from the space for the given partition ID and the given flags.
      boolean freePage​(int grpId, long pageId)
      The given page is free now.

    • Field Detail

      • FLAG_DATA

        static final byte FLAG_DATA
        Flag for a Data page. Also used by partition meta and tracking pages. This type doesn't use the Page ID rotation mechanism.
        See Also:
        Constant Field Values

      • FLAG_IDX

        static final byte FLAG_IDX
        Flag for an index page. Also used by internal structure in in-memory caches. This type uses the Page ID rotation mechanism.
        See Also:
        Constant Field Values

      • FLAG_AUX

        static final byte FLAG_AUX
        Flag for an internal structure page. This type uses the Page ID rotation mechanism.
        See Also:
        Constant Field Values

      • MAX_PARTITION_ID

        static final int MAX_PARTITION_ID
        Max partition ID that can be used by affinity.
        See Also:
        Constant Field Values

      • INDEX_PARTITION

        static final int INDEX_PARTITION
        Special partition reserved for index space.
        See Also:
        Constant Field Values

      • META_PAGE_ID

        static final long META_PAGE_ID
        Cache group meta page id.

    • Method Detail

      • allocatePage

        long allocatePage​(int grpId,
                  int partId,
                  byte flags)
           throws IgniteCheckedException
        Allocates a page from the space for the given partition ID and the given flags.
        Parameters:
        grpId - Cache Group ID.
        partId - Partition ID.
        Returns:
        Allocated page ID.
        Throws:
        IgniteCheckedException

      • freePage

        boolean freePage​(int grpId,
                 long pageId)
        The given page is free now.
        Parameters:
        grpId - Cache Group ID.
        pageId - Page ID.