Examples with ICachedPage org.apache.hyracks.storage.common.buffercache.ICachedPage used on opensource projects

Example 51 with ICachedPage

use of org.apache.hyracks.storage.common.buffercache.ICachedPage in project asterixdb by apache.

the class AppendOnlyLinkedMetadataPageManager method releasePage.

@Override
public void releasePage(ITreeIndexMetadataFrame metaFrame, int freePageNum) throws HyracksDataException {
    ICachedPage metaPage = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, getMetadataPageId()), false);
    metaPage.acquireWriteLatch();
    try {
        metaFrame.setPage(metaPage);
        if (metaFrame.getSpace() > Integer.BYTES) {
            metaFrame.addFreePage(freePageNum);
        } else {
            int newPageNum = metaFrame.getFreePage();
            if (newPageNum < 0) {
                throw new HyracksDataException("Inconsistent Meta Page State. It has no space, but it also has no entries.");
            }
            ICachedPage newNode = bufferCache.pin(BufferedFileHandle.getDiskPageId(fileId, newPageNum), false);
            newNode.acquireWriteLatch();
            try {
                int metaMaxPage = metaFrame.getMaxPage();
                System.arraycopy(metaPage.getBuffer().array(), 0, newNode.getBuffer().array(), 0, metaPage.getBuffer().capacity());
                metaFrame.init();
                metaFrame.setNextMetadataPage(newPageNum);
                metaFrame.setMaxPage(metaMaxPage);
                metaFrame.addFreePage(freePageNum);
            } finally {
                newNode.releaseWriteLatch(true);
                bufferCache.unpin(newNode);
            }
        }
    } finally {
        metaPage.releaseWriteLatch(true);
        bufferCache.unpin(metaPage);
    }
}