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

Interface IndexStorage

All Known Implementing Classes:

IndexStorageImpl

public interface IndexStorage

Meta store.

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.

Method Detail

getOrAllocateForTree

RootPage getOrAllocateForTree(String idxName)
                       throws IgniteCheckedException

Get or allocate initial page for an index.

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

RootPage dropRootPage(String idxName)
               throws IgniteCheckedException

Deallocate index page and remove from tree.

Parameters:

idxName - Index name.

Returns:

Root ID or -1 if no page was removed.

Throws:

IgniteCheckedException - If failed.

destroy

void destroy()
      throws IgniteCheckedException

Destroy this meta store.

Throws:

IgniteCheckedException - If failed.