Package com._1c.g5.v8.xmdb.impl

Class TreeCacheInMemory

java.lang.Object
com._1c.g5.v8.xmdb.impl.TreeCacheInMemory
All Implemented Interfaces:
ITreeCache
public class TreeCacheInMemory extends Object implements ITreeCache
In memory cache implementation

  • Constructor Summary

    Constructors
    Constructor
    Description
    TreeCacheInMemory(boolean threadSafe)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    long
    clone(long cLink)
    Clone element by cLink (new element should not be cached by default).
    void
    dropCaches()
    Drop all cache
    void
    dropCaches(int segment)
    Drop cache entry with specified segment id
    void
    evict()
    Evict (usually - write to disk, but not sync) all cache entry (from write node cache).
    void
    evict(int segmentId)
    Evict (usually - write to disk, but no sync) all cache entry (from write node cache) with specified segmentId.
    BNode
    get(long cLink, boolean storeValuesInLeaf, int t, int segment)
    Read BNode from cache.
    Engine
    getEngine()
    Get underlying db engine
    byte[]
    getObject(long cLink, int segment)
    Read object from cache.
    long
    put(long oldPos, BNode val, int segment, boolean valInLeaf, int preallocFreeSpace)
    Put (insert or update) BNode into cache.
    long
    putObject(byte[] value, int segment)
    Put object (value) into cache
    long
    putObject(ByteBuffer value, int segment)
    Put object (value) into cache
    byte[]
    removeObject(long cLink, int segment)
    Removes object from cache.
    void
    sync()
    Sync all write node cache entry and sync
    void
    sync(int segmentId)
    Write to disk (and sync) all cache entry (from write node cache) with specified segmentId.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • TreeCacheInMemory

      public TreeCacheInMemory(boolean threadSafe)

  • Method Details

    • put

      public long put(long oldPos, BNode val, int segment, boolean valInLeaf, int preallocFreeSpace)
      Description copied from interface: ITreeCache
      Put (insert or update) BNode into cache. Cache return new adress of BNode (can be the same if BNode fit into allocated block)
      Specified by:
      put in interface ITreeCache
      Parameters:
      oldPos - old cLink address of BNode or CompactLink.EMPTY_LINK if its first time save to current BNode
      val - BNode to save
      segment - segment id
      valInLeaf - store value in leaf flag
      preallocFreeSpace - default prealloc space for current BTree
      Returns:
      actual cLink to stored BNode

    • putObject

      public long putObject(ByteBuffer value, int segment)
      Description copied from interface: ITreeCache
      Put object (value) into cache
      Specified by:
      putObject in interface ITreeCache
      Parameters:
      value - value to store
      segment - segment id
      Returns:
      actual cLink to stored object

    • putObject

      public long putObject(byte[] value, int segment)
      Description copied from interface: ITreeCache
      Put object (value) into cache
      Specified by:
      putObject in interface ITreeCache
      Parameters:
      value - value to store
      segment - segment id
      Returns:
      actual cLink to stored object

    • get

      public BNode get(long cLink, boolean storeValuesInLeaf, int t, int segment)
      Description copied from interface: ITreeCache
      Read BNode from cache. If BNode won't be found in read/write node caches - it will be load from disk into read cache before return
      Specified by:
      get in interface ITreeCache
      Parameters:
      cLink - BNode address (cLink)
      storeValuesInLeaf - value in leaf flag (for deserialization, if node on disk)
      t - node width, t (for deserialization, if node on disk)
      segment - segment id
      Returns:
      readed BNode

    • getObject

      public byte[] getObject(long cLink, int segment)
      Description copied from interface: ITreeCache
      Read object from cache. If object won't be found in object cache - it will be load from disk into object cache before return
      Specified by:
      getObject in interface ITreeCache
      Parameters:
      cLink - object address (cLink)
      segment - segmentId
      Returns:
      readed object

    • removeObject

      public byte[] removeObject(long cLink, int segment)
      Description copied from interface: ITreeCache
      Removes object from cache.
      Specified by:
      removeObject in interface ITreeCache
      Parameters:
      cLink - object address (cLink)
      segment - segmentId
      Returns:
      removed object

    • dropCaches

      public void dropCaches(int segment)
      Description copied from interface: ITreeCache
      Drop cache entry with specified segment id
      Specified by:
      dropCaches in interface ITreeCache
      Parameters:
      segment - segment id to drop

    • dropCaches

      public void dropCaches()
      Description copied from interface: ITreeCache
      Drop all cache
      Specified by:
      dropCaches in interface ITreeCache

    • sync

      public void sync(int segmentId)
      Description copied from interface: ITreeCache
      Write to disk (and sync) all cache entry (from write node cache) with specified segmentId. Writed segments will be moved to read cache.
      Specified by:
      sync in interface ITreeCache
      Parameters:
      segmentId - segment to write

    • sync

      public void sync()
      Description copied from interface: ITreeCache
      Sync all write node cache entry and sync
      Specified by:
      sync in interface ITreeCache

    • evict

      public void evict(int segmentId)
      Description copied from interface: ITreeCache
      Evict (usually - write to disk, but no sync) all cache entry (from write node cache) with specified segmentId. Writed segments will be removed from cache. Remove all cache entry with specified segmentId from read/object caches.
      Specified by:
      evict in interface ITreeCache
      Parameters:
      segmentId - segment to evict

    • evict

      public void evict()
      Description copied from interface: ITreeCache
      Evict (usually - write to disk, but not sync) all cache entry (from write node cache). Remove all cache entry from read/object caches.
      Specified by:
      evict in interface ITreeCache

    • getEngine

      public Engine getEngine()
      Description copied from interface: ITreeCache
      Get underlying db engine
      Specified by:
      getEngine in interface ITreeCache
      Returns:
      engine

    • clone

      public long clone(long cLink)
      Description copied from interface: ITreeCache
      Clone element by cLink (new element should not be cached by default). Not for value body objects.
      Specified by:
      clone in interface ITreeCache
      Parameters:
      cLink - link to original element to clone
      Returns:
      link to clone of original element