Java INode.isReference方法代码示例

import org.apache.hadoop.hdfs.server.namenode.INode; //导入方法依赖的package包/类
private void serializeDirDiffList(INodeDirectory dir,
    final List<INodeReference> refList, OutputStream out)
    throws IOException {
  DirectoryWithSnapshotFeature sf = dir.getDirectoryWithSnapshotFeature();
  if (sf != null) {
    List<DirectoryDiff> diffList = sf.getDiffs().asList();
    SnapshotDiffSection.DiffEntry entry = SnapshotDiffSection.DiffEntry
        .newBuilder().setInodeId(dir.getId()).setType(Type.DIRECTORYDIFF)
        .setNumOfDiff(diffList.size()).build();
    entry.writeDelimitedTo(out);
    for (int i = diffList.size() - 1; i >= 0; i--) { // reverse order!
      DirectoryDiff diff = diffList.get(i);
      SnapshotDiffSection.DirectoryDiff.Builder db = SnapshotDiffSection.
          DirectoryDiff.newBuilder().setSnapshotId(diff.getSnapshotId())
                       .setChildrenSize(diff.getChildrenSize())
                       .setIsSnapshotRoot(diff.isSnapshotRoot());
      INodeDirectoryAttributes copy = diff.snapshotINode;
      if (!diff.isSnapshotRoot() && copy != null) {
        db.setName(ByteString.copyFrom(copy.getLocalNameBytes()))
            .setSnapshotCopy(
                buildINodeDirectory(copy, parent.getSaverContext()));
      }
      // process created list and deleted list
      List<INode> created = diff.getChildrenDiff()
          .getList(ListType.CREATED);
      db.setCreatedListSize(created.size());
      List<INode> deleted = diff.getChildrenDiff().getList(ListType.DELETED);
      for (INode d : deleted) {
        if (d.isReference()) {
          refList.add(d.asReference());
          db.addDeletedINodeRef(refList.size() - 1);
        } else {
          db.addDeletedINode(d.getId());
        }
      }
      db.build().writeDelimitedTo(out);
      saveCreatedList(created, out);
    }
  }
}
 

import org.apache.hadoop.hdfs.server.namenode.INode; //导入方法依赖的package包/类
/**
 * Destroy a subtree under a DstReference node.
 */
public static void destroyDstSubtree(
    final BlockStoragePolicySuite bsps, INode inode, final int snapshot,
    final int prior, final BlocksMapUpdateInfo collectedBlocks,
    final List<INode> removedINodes) throws QuotaExceededException {
  Preconditions.checkArgument(prior != Snapshot.NO_SNAPSHOT_ID);
  if (inode.isReference()) {
    if (inode instanceof INodeReference.WithName
        && snapshot != Snapshot.CURRENT_STATE_ID) {
      // this inode has been renamed before the deletion of the DstReference
      // subtree
      inode.cleanSubtree(bsps, snapshot, prior, collectedBlocks, removedINodes);
    } else { 
      // for DstReference node, continue this process to its subtree
      destroyDstSubtree(bsps, inode.asReference().getReferredINode(), snapshot,
          prior, collectedBlocks, removedINodes);
    }
  } else if (inode.isFile()) {
    inode.cleanSubtree(bsps, snapshot, prior, collectedBlocks, removedINodes);
  } else if (inode.isDirectory()) {
    Map<INode, INode> excludedNodes = null;
    INodeDirectory dir = inode.asDirectory();
    DirectoryWithSnapshotFeature sf = dir.getDirectoryWithSnapshotFeature();
    if (sf != null) {
      DirectoryDiffList diffList = sf.getDiffs();
      DirectoryDiff priorDiff = diffList.getDiffById(prior);
      if (priorDiff != null && priorDiff.getSnapshotId() == prior) {
        List<INode> dList = priorDiff.diff.getList(ListType.DELETED);
        excludedNodes = cloneDiffList(dList);
      }
      
      if (snapshot != Snapshot.CURRENT_STATE_ID) {
        diffList.deleteSnapshotDiff(bsps, snapshot, prior, dir, collectedBlocks,
            removedINodes);
      }
      priorDiff = diffList.getDiffById(prior);
      if (priorDiff != null && priorDiff.getSnapshotId() == prior) {
        priorDiff.diff.destroyCreatedList(bsps, dir, collectedBlocks,
            removedINodes);
      }
    }
    for (INode child : inode.asDirectory().getChildrenList(prior)) {
      if (excludedNodes != null && excludedNodes.containsKey(child)) {
        continue;
      }
      destroyDstSubtree(bsps, child, snapshot, prior, collectedBlocks,
          removedINodes);
    }
  }
}
 

import org.apache.hadoop.hdfs.server.namenode.INode; //导入方法依赖的package包/类
/**
 * Destroy a subtree under a DstReference node.
 */
public static void destroyDstSubtree(INode.ReclaimContext reclaimContext,
    INode inode, final int snapshot, final int prior) {
  Preconditions.checkArgument(prior != NO_SNAPSHOT_ID);
  if (inode.isReference()) {
    if (inode instanceof INodeReference.WithName
        && snapshot != Snapshot.CURRENT_STATE_ID) {
      // this inode has been renamed before the deletion of the DstReference
      // subtree
      inode.cleanSubtree(reclaimContext, snapshot, prior);
    } else {
      // for DstReference node, continue this process to its subtree
      destroyDstSubtree(reclaimContext,
          inode.asReference().getReferredINode(), snapshot, prior);
    }
  } else if (inode.isFile()) {
    inode.cleanSubtree(reclaimContext, snapshot, prior);
  } else if (inode.isDirectory()) {
    Map<INode, INode> excludedNodes = null;
    INodeDirectory dir = inode.asDirectory();
    DirectoryWithSnapshotFeature sf = dir.getDirectoryWithSnapshotFeature();
    if (sf != null) {
      DirectoryDiffList diffList = sf.getDiffs();
      DirectoryDiff priorDiff = diffList.getDiffById(prior);
      if (priorDiff != null && priorDiff.getSnapshotId() == prior) {
        List<INode> dList = priorDiff.diff.getList(ListType.DELETED);
        excludedNodes = cloneDiffList(dList);
      }
      
      if (snapshot != Snapshot.CURRENT_STATE_ID) {
        diffList.deleteSnapshotDiff(reclaimContext,
            snapshot, prior, dir);
      }
      priorDiff = diffList.getDiffById(prior);
      if (priorDiff != null && priorDiff.getSnapshotId() == prior) {
        priorDiff.diff.destroyCreatedList(reclaimContext, dir);
      }
    }
    for (INode child : inode.asDirectory().getChildrenList(prior)) {
      if (excludedNodes != null && excludedNodes.containsKey(child)) {
        continue;
      }
      destroyDstSubtree(reclaimContext, child, snapshot, prior);
    }
  }
}