ArafatKhan2198 commented on code in PR #6492:
URL: https://github.com/apache/ozone/pull/6492#discussion_r1591920942
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hadoop-ozone/recon/src/main/java/org/apache/hadoop/ozone/recon/ReconUtils.java:
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@@ -246,25 +257,106 @@ public void untarCheckpointFile(File tarFile, Path
destPath)
}
}
+
+ /**
+ * Constructs the full path of a key from its OmKeyInfo using a bottom-up
approach, starting from the leaf node.
+ *
+ * The method begins with the leaf node (the key itself) and recursively
prepends parent directory names, fetched
+ * via NSSummary objects, until reaching the parent bucket (parentId is -1).
It effectively builds the path from
+ * bottom to top, finally prepending the volume and bucket names to complete
the full path. If the directory structure
+ * is currently being rebuilt (indicated by the isRebuilding flag), this
method returns an empty string to signify
+ * that path construction is temporarily unavailable.
+ *
+ * @param omKeyInfo The OmKeyInfo object for the key
+ * @return The constructed full path of the key as a String, or an empty
string if a rebuild is in progress and
+ * the path cannot be constructed at this time.
+ * @throws IOException
+ */
+
+ public static String constructFullPath(OmKeyInfo omKeyInfo,
+ ReconNamespaceSummaryManager
reconNamespaceSummaryManager,
+ ReconOMMetadataManager
omMetadataManager)
+ throws IOException {
+
+ // Return empty string to signify that path construction is temporarily
unavailable
+ if (isRebuilding) {
+ return "";
+ }
+
+ StringBuilder fullPath = new StringBuilder(omKeyInfo.getKeyName());
+ long parentId = omKeyInfo.getParentObjectID();
+ boolean isDirectoryPresent = false;
+
+ while (parentId != 0) {
+ NSSummary nsSummary =
reconNamespaceSummaryManager.getNSSummary(parentId);
+ if (nsSummary == null) {
+ break;
+ }
+ if (nsSummary.getParentId() == -1 && !rebuildTriggered) {
+ synchronized (ReconUtils.class) {
+ if (!rebuildTriggered) {
+ triggerRebuild(reconNamespaceSummaryManager, omMetadataManager);
+ rebuildTriggered = true; // Set the flag to true inside a
synchronized block
+ }
+ }
+ }
+ fullPath.insert(0, nsSummary.getDirName() + OM_KEY_PREFIX);
+
+ // Move to the parent ID of the current directory
+ parentId = nsSummary.getParentId();
+ isDirectoryPresent = true;
+ }
+
+ // Prepend the volume and bucket to the constructed path
+ String volumeName = omKeyInfo.getVolumeName();
+ String bucketName = omKeyInfo.getBucketName();
+ fullPath.insert(0, volumeName + OM_KEY_PREFIX + bucketName +
OM_KEY_PREFIX);
Review Comment:
Yes, that's exactly why I added the normalize function—to eliminate the
extra slash that gets added. We discussed this offline after discovering that
the bucket name was being included twice in the path.
For example lets consider the `NSSummary` object of a bucket in the
NSSummary tree in recon, the bucket name is not present in the NSSummary
instance and in the field of the `dirName` the value is left empty. Since we
are treating the bucket as a directory inside the loop and appending its name
in the path an empty directory name would simply add extra slash to the path.
Hence we normalise the path to remove the empty slash.
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