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Posted to issues@ozone.apache.org by GitBox <gi...@apache.org> on 2020/12/04 09:03:09 UTC
[GitHub] [ozone] linyiqun commented on a change in pull request #1607: HDDS-4358: Delete : make delete an atomic operation
linyiqun commented on a change in pull request #1607:
URL: https://github.com/apache/ozone/pull/1607#discussion_r535940099
##########
File path: hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/request/file/OMFileRequest.java
##########
@@ -759,4 +762,93 @@ public static long getToKeyNameParentId(String volumeName,
}
return toKeyParentDirStatus.getKeyInfo().getObjectID();
}
+
+ /**
+ * Check if there are any sub path exist for the given user key path.
+ *
+ * @param omKeyInfo om key path
+ * @param metaMgr OMMetadataManager
+ * @return true if there are any sub path, false otherwise
+ * @throws IOException DB exception
+ */
+ public static boolean hasChildren(OmKeyInfo omKeyInfo,
+ OMMetadataManager metaMgr) throws IOException {
+ return checkSubDirectoryExists(omKeyInfo, metaMgr) ||
+ checkSubFileExists(omKeyInfo, metaMgr);
+ }
+
+ private static boolean checkSubDirectoryExists(OmKeyInfo omKeyInfo,
+ OMMetadataManager metaMgr) throws IOException {
+ // Check all dirTable cache for any sub paths.
+ Table dirTable = metaMgr.getDirectoryTable();
+ Iterator<Map.Entry<CacheKey<String>, CacheValue<OmDirectoryInfo>>>
+ cacheIter = dirTable.cacheIterator();
+
+ while (cacheIter.hasNext()) {
+ Map.Entry<CacheKey<String>, CacheValue<OmDirectoryInfo>> entry =
+ cacheIter.next();
+ OmDirectoryInfo cacheOmDirInfo = entry.getValue().getCacheValue();
+ if (cacheOmDirInfo == null) {
+ continue;
+ }
+ if (isImmediateChild(cacheOmDirInfo.getParentObjectID(),
+ omKeyInfo.getObjectID())) {
+ return true; // found a sub path directory
+ }
+ }
+
+ // Check dirTable entries for any sub paths.
+ String seekDirInDB = metaMgr.getOzonePathKey(omKeyInfo.getObjectID(), "");
+ TableIterator<String, ? extends Table.KeyValue<String, OmDirectoryInfo>>
+ iterator = dirTable.iterator();
+
+ iterator.seek(seekDirInDB);
+
+ while (iterator.hasNext()) {
+ OmDirectoryInfo dirInfo = iterator.value().getValue();
+ return isImmediateChild(dirInfo.getParentObjectID(),
+ omKeyInfo.getObjectID());
+ }
+ return false; // no sub paths found
+ }
+
+ private static boolean checkSubFileExists(OmKeyInfo omKeyInfo,
+ OMMetadataManager metaMgr) throws IOException {
+ // Check all fileTable cache for any sub paths.
+ Table fileTable = metaMgr.getKeyTable();
+ Iterator<Map.Entry<CacheKey<String>, CacheValue<OmKeyInfo>>>
+ cacheIter = fileTable.cacheIterator();
+
+ while (cacheIter.hasNext()) {
+ Map.Entry<CacheKey<String>, CacheValue<OmKeyInfo>> entry =
+ cacheIter.next();
+ OmKeyInfo cacheOmFileInfo = entry.getValue().getCacheValue();
+ if (cacheOmFileInfo == null) {
+ continue;
+ }
+ if (isImmediateChild(cacheOmFileInfo.getParentObjectID(),
+ omKeyInfo.getObjectID())) {
+ return true; // found a sub path file
+ }
+ }
+
+ // Check fileTable entries for any sub paths.
+ String seekFileInDB = metaMgr.getOzonePathKey(
+ omKeyInfo.getObjectID(), "");
+ TableIterator<String, ? extends Table.KeyValue<String, OmKeyInfo>>
+ iterator = fileTable.iterator();
+
+ iterator.seek(seekFileInDB);
+
+ while (iterator.hasNext()) {
+ OmKeyInfo fileInfo = iterator.value().getValue();
+ return isImmediateChild(fileInfo.getParentObjectID(),
+ omKeyInfo.getObjectID()); // found a sub path file
+ }
Review comment:
The same comment for above place.
##########
File path: hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/request/file/OMFileRequest.java
##########
@@ -759,4 +762,93 @@ public static long getToKeyNameParentId(String volumeName,
}
return toKeyParentDirStatus.getKeyInfo().getObjectID();
}
+
+ /**
+ * Check if there are any sub path exist for the given user key path.
+ *
+ * @param omKeyInfo om key path
+ * @param metaMgr OMMetadataManager
+ * @return true if there are any sub path, false otherwise
+ * @throws IOException DB exception
+ */
+ public static boolean hasChildren(OmKeyInfo omKeyInfo,
+ OMMetadataManager metaMgr) throws IOException {
+ return checkSubDirectoryExists(omKeyInfo, metaMgr) ||
+ checkSubFileExists(omKeyInfo, metaMgr);
+ }
+
+ private static boolean checkSubDirectoryExists(OmKeyInfo omKeyInfo,
+ OMMetadataManager metaMgr) throws IOException {
+ // Check all dirTable cache for any sub paths.
+ Table dirTable = metaMgr.getDirectoryTable();
+ Iterator<Map.Entry<CacheKey<String>, CacheValue<OmDirectoryInfo>>>
+ cacheIter = dirTable.cacheIterator();
+
+ while (cacheIter.hasNext()) {
+ Map.Entry<CacheKey<String>, CacheValue<OmDirectoryInfo>> entry =
+ cacheIter.next();
+ OmDirectoryInfo cacheOmDirInfo = entry.getValue().getCacheValue();
+ if (cacheOmDirInfo == null) {
+ continue;
+ }
+ if (isImmediateChild(cacheOmDirInfo.getParentObjectID(),
+ omKeyInfo.getObjectID())) {
+ return true; // found a sub path directory
+ }
+ }
+
+ // Check dirTable entries for any sub paths.
+ String seekDirInDB = metaMgr.getOzonePathKey(omKeyInfo.getObjectID(), "");
+ TableIterator<String, ? extends Table.KeyValue<String, OmDirectoryInfo>>
+ iterator = dirTable.iterator();
+
+ iterator.seek(seekDirInDB);
+
+ while (iterator.hasNext()) {
+ OmDirectoryInfo dirInfo = iterator.value().getValue();
+ return isImmediateChild(dirInfo.getParentObjectID(),
+ omKeyInfo.getObjectID());
Review comment:
Here should use 'if (iterator.hasNext())' not 'while (iterator.hasNext())'. We just check if the next path is immediate child.
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