org.apache.ignite.internal.processors.cache.persistence

Class IndexStorageImpl

java.lang.Object

org.apache.ignite.internal.processors.cache.persistence.IndexStorageImpl

All Implemented Interfaces:

IndexStorage

public class IndexStorageImpl
extends Object
implements IndexStorage

Metadata storage.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	IndexStorageImpl.MetaStoreInnerIO
static class	IndexStorageImpl.MetaStoreLeafIO

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_IDX_NAME_LEN Max index name length (bytes num)
static int	RESERVED_IDX_NAME_LEN Reserved size for index name.

Constructor Summary

Constructors

Constructor and Description
IndexStorageImpl(PageMemory pageMem, IgniteWriteAheadLogManager wal, AtomicLong globalRmvId, int grpId, int allocPartId, byte allocSpace, ReuseList reuseList, long rootPageId, boolean initNew)

Method Summary

Modifier and Type	Method and Description
void	destroy() Destroy this meta store.
RootPage	dropRootPage(String idxName) Deallocate index page and remove from tree.
RootPage	getOrAllocateForTree(String idxName) Get or allocate initial page for an index.

Methods inherited from class java.lang.Object

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

Field Detail

MAX_IDX_NAME_LEN

public static final int MAX_IDX_NAME_LEN

Max index name length (bytes num)

See Also:

Constant Field Values

RESERVED_IDX_NAME_LEN

public static final int RESERVED_IDX_NAME_LEN

Reserved size for index name. Needed for backward compatibility.

See Also:

Constant Field Values

Constructor Detail

IndexStorageImpl

public IndexStorageImpl(PageMemory pageMem,
                        IgniteWriteAheadLogManager wal,
                        AtomicLong globalRmvId,
                        int grpId,
                        int allocPartId,
                        byte allocSpace,
                        ReuseList reuseList,
                        long rootPageId,
                        boolean initNew)

Parameters:

pageMem - Page memory.

wal - Write ahead log manager.

Method Detail

getOrAllocateForTree

public RootPage getOrAllocateForTree(String idxName)
                              throws IgniteCheckedException

Get or allocate initial page for an index.

Specified by:

getOrAllocateForTree in interface IndexStorage

Parameters:

idxName - Index name.

Returns:

RootPage that keeps pageId, allocated flag that shows whether the page was newly allocated, and rootId that is counter which increments each time new page allocated.

Throws:

IgniteCheckedException - If failed.

dropRootPage

public RootPage dropRootPage(String idxName)
                      throws IgniteCheckedException

Deallocate index page and remove from tree.

Specified by:

dropRootPage in interface IndexStorage

Parameters:

idxName - Index name.

Returns:

Root ID or -1 if no page was removed.

Throws:

IgniteCheckedException - If failed.

destroy

public void destroy()
             throws IgniteCheckedException

Destroy this meta store.

Specified by:

destroy in interface IndexStorage

Throws:

IgniteCheckedException - If failed.