Examples with DataPageIO org.apache.ignite.internal.processors.cache.persistence.tree.io.DataPageIO used on opensource projects

Example 11 with DataPageIO

use of org.apache.ignite.internal.processors.cache.persistence.tree.io.DataPageIO in project ignite by apache.

the class MvccUtils method invoke.

/**
 * Encapsulates common logic for working with row mvcc info: page locking/unlocking, checks and other.
 * Strategy pattern.
 *
 * @param cctx Cache group.
 * @param link Row link.
 * @param clo Closure to apply.
 * @param snapshot Mvcc snapshot.
 * @param <R> Return type.
 * @return Result.
 * @throws IgniteCheckedException If failed.
 */
private static <R> R invoke(GridCacheContext cctx, long link, MvccClosure<R> clo, MvccSnapshot snapshot) throws IgniteCheckedException {
    assert cctx.mvccEnabled();
    PageMemory pageMem = cctx.dataRegion().pageMemory();
    int grpId = cctx.groupId();
    int pageSize = pageMem.realPageSize(grpId);
    long pageId = pageId(link);
    int itemId = itemId(link);
    long page = pageMem.acquirePage(grpId, pageId);
    try {
        long pageAddr = pageMem.readLock(grpId, pageId, page);
        try {
            DataPageIO dataIo = DataPageIO.VERSIONS.forPage(pageAddr);
            return invoke(cctx, dataIo, pageAddr, itemId, pageSize, clo, snapshot);
        } finally {
            pageMem.readUnlock(grpId, pageId, page);
        }
    } finally {
        pageMem.releasePage(grpId, pageId, page);
    }
}