swamirishi commented on code in PR #7200:
URL: https://github.com/apache/ozone/pull/7200#discussion_r1765860141
##########
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/KeyManagerImpl.java:
##########
@@ -662,6 +664,53 @@ public PendingKeysDeletion getPendingDeletionKeys(final
int count)
.getPendingDeletionKeys(count, ozoneManager.getOmSnapshotManager());
}
+ private <V, R> List<Table.KeyValue<String, R>> getTableEntries(String
startKey,
+ TableIterator<String, ? extends Table.KeyValue<String, V>>
tableIterator,
+ Function<V, R> valueFunction, int count) throws IOException {
+ List<Table.KeyValue<String, R>> entries = new ArrayList<>();
+ /* Seeking to the start key if it not null. The next key picked up would
be ensured to start with the bucket
+ prefix, {@link
org.apache.hadoop.hdds.utils.db.Table#iterator(bucketPrefix)} would ensure this.
+ */
+ if (startKey != null) {
+ tableIterator.seek(startKey);
+ }
+ int currentCount = 0;
+ while (tableIterator.hasNext() && currentCount < count) {
+ Table.KeyValue<String, V> kv = tableIterator.next();
+ if (kv != null) {
+ entries.add(Table.newKeyValue(kv.getKey(),
valueFunction.apply(kv.getValue())));
+ currentCount++;
+ }
+ }
+ return entries;
+ }
+
+
+ @Override
+ public List<Table.KeyValue<String, String>> getRenamesKeyEntries(
+ String volume, String bucket, String startKey, int count) throws
IOException {
+ // Bucket prefix would be empty if volume is empty i.e. either null or "".
+ Optional<String> bucketPrefix = Optional.ofNullable(volume).map(vol ->
vol.isEmpty() ? null : vol)
+ .map(vol -> metadataManager.getBucketKeyPrefix(vol, bucket));
+ try (TableIterator<String, ? extends Table.KeyValue<String, String>>
+ renamedKeyIter =
metadataManager.getSnapshotRenamedTable().iterator(bucketPrefix.orElse(""))) {
+ return getTableEntries(startKey, renamedKeyIter, Function.identity(),
count);
+ }
+ }
+
+ @Override
+ public List<Table.KeyValue<String, List<OmKeyInfo>>> getDeletedKeyEntries(
+ String volume, String bucket, String startKey, int count) throws
IOException {
+ // Bucket prefix would be empty if volume is empty i.e. either null or "".
+ Optional<String> bucketPrefix = Optional.ofNullable(volume).map(vol ->
vol.isEmpty() ? null : vol)
+ .map(vol -> metadataManager.getBucketKeyPrefix(vol, bucket));
+ List<Table.KeyValue<String, List<OmKeyInfo>>> deletedKeyEntries = new
ArrayList<>(count);
Review Comment:
done
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