Examples with PageId alluxio.client.file.cache.PageId used on opensource projects

Example 21 with PageId

use of alluxio.client.file.cache.PageId in project alluxio by Alluxio.

the class MemoryPageStore method delete.

@Override
public void delete(PageId pageId) throws IOException, PageNotFoundException {
    PageId pageKey = getKeyFromPageId(pageId);
    if (!mPageStoreMap.containsKey(pageKey)) {
        throw new PageNotFoundException(pageId.getFileId() + "_" + pageId.getPageIndex());
    }
    mPageStoreMap.remove(pageKey);
    LOG.info("Remove cached page, size: {}", mPageStoreMap.size());
}

Example 22 with PageId

use of alluxio.client.file.cache.PageId in project alluxio by Alluxio.

the class MemoryPageStore method get.

@Override
public int get(PageId pageId, int pageOffset, int bytesToRead, byte[] buffer, int bufferOffset) throws IOException, PageNotFoundException {
    Preconditions.checkArgument(buffer != null, "buffer is null");
    Preconditions.checkArgument(pageOffset >= 0, "page offset should be non-negative");
    Preconditions.checkArgument(buffer.length >= bufferOffset, "page offset %s should be " + "less or equal than buffer length %s", bufferOffset, buffer.length);
    PageId pageKey = getKeyFromPageId(pageId);
    if (!mPageStoreMap.containsKey(pageKey)) {
        throw new PageNotFoundException(pageId.getFileId() + "_" + pageId.getPageIndex());
    }
    byte[] mPage = mPageStoreMap.get(pageKey);
    Preconditions.checkArgument(pageOffset <= mPage.length, "page offset %s exceeded page size %s", pageOffset, mPage.length);
    int bytesLeft = (int) Math.min(mPage.length - pageOffset, buffer.length - bufferOffset);
    bytesLeft = Math.min(bytesLeft, bytesToRead);
    System.arraycopy(mPage, pageOffset, buffer, bufferOffset, bytesLeft);
    return bytesLeft;
}