Java INodeDirectory.removeChild方法代码示例

import org.apache.hadoop.hdfs.server.namenode.INodeDirectory; //导入方法依赖的package包/类
/** clear the created list */
private QuotaCounts destroyCreatedList(
    final BlockStoragePolicySuite bsps,
    final INodeDirectory currentINode,
    final BlocksMapUpdateInfo collectedBlocks,
    final List<INode> removedINodes) {
  QuotaCounts counts = new QuotaCounts.Builder().build();
  final List<INode> createdList = getList(ListType.CREATED);
  for (INode c : createdList) {
    c.computeQuotaUsage(bsps, counts, true);
    c.destroyAndCollectBlocks(bsps, collectedBlocks, removedINodes);
    // c should be contained in the children list, remove it
    currentINode.removeChild(c);
  }
  createdList.clear();
  return counts;
}
 

import org.apache.hadoop.hdfs.server.namenode.INodeDirectory; //导入方法依赖的package包/类
/**
 * Remove an inode from parent's children list. The caller of this method
 * needs to make sure that parent is in the given snapshot "latest".
 */
public boolean removeChild(INodeDirectory parent, INode child,
    int latestSnapshotId) {
  // For a directory that is not a renamed node, if isInLatestSnapshot returns
  // false, the directory is not in the latest snapshot, thus we do not need
  // to record the removed child in any snapshot.
  // For a directory that was moved/renamed, note that if the directory is in
  // any of the previous snapshots, we will create a reference node for the
  // directory while rename, and isInLatestSnapshot will return true in that
  // scenario (if all previous snapshots have been deleted, isInLatestSnapshot
  // still returns false). Thus if isInLatestSnapshot returns false, the
  // directory node cannot be in any snapshot (not in current tree, nor in
  // previous src tree). Thus we do not need to record the removed child in
  // any snapshot.
  ChildrenDiff diff = diffs.checkAndAddLatestSnapshotDiff(latestSnapshotId,
      parent).diff;
  UndoInfo<INode> undoInfo = diff.delete(child);

  final boolean removed = parent.removeChild(child);
  if (!removed && undoInfo != null) {
    // remove failed, undo
    diff.undoDelete(child, undoInfo);
  }
  return removed;
}
 

import org.apache.hadoop.hdfs.server.namenode.INodeDirectory; //导入方法依赖的package包/类
/** clear the created list */
private void destroyCreatedList(INode.ReclaimContext reclaimContext,
    final INodeDirectory currentINode) {
  final List<INode> createdList = getList(ListType.CREATED);
  for (INode c : createdList) {
    c.destroyAndCollectBlocks(reclaimContext);
    // c should be contained in the children list, remove it
    currentINode.removeChild(c);
  }
  createdList.clear();
}