snleee commented on code in PR #12275:
URL: https://github.com/apache/pinot/pull/12275#discussion_r1457038696
##########
pinot-controller/src/main/java/org/apache/pinot/controller/util/ServerSegmentMetadataReader.java:
##########
@@ -180,27 +199,126 @@ public List<String> getSegmentMetadataFromServer(String
tableNameWithType,
return segmentsMetadata;
}
+ /**
+ * This method is called when the API request is to fetch validDocId
metadata for a list segments of the given table.
+ * This method will pick a server that hosts the target segment and fetch
the segment metadata result.
+ *
+ * @return segment metadata as a JSON string
+ */
+ public List<ValidDocIdMetadataInfo> getValidDocIdMetadataFromServer(String
tableNameWithType,
+ Map<String, List<String>> serverToSegmentsMap, BiMap<String, String>
serverToEndpoints,
+ @Nullable List<String> segmentNames, int timeoutMs) {
+ List<Pair<String, String>> serverURLsAndBodies = new ArrayList<>();
+ for (Map.Entry<String, List<String>> serverToSegments :
serverToSegmentsMap.entrySet()) {
+ List<String> segmentsForServer = serverToSegments.getValue();
+ List<String> segmentsToQuery = new ArrayList<>();
+ for (String segment : segmentsForServer) {
+ if (segmentNames == null) {
+ // If segmentNames is null, query all segments
+ segmentsToQuery.add(segment);
+ } else if (segmentNames.contains(segment)) {
+ segmentsToQuery.add(segment);
+ }
+ }
+ serverURLsAndBodies.add(generateValidDocIdMetadataURL(tableNameWithType,
segmentsToQuery,
+ serverToEndpoints.get(serverToSegments.getKey())));
+ }
+
+ // request the urls from the servers
+ CompletionServiceHelper completionServiceHelper =
+ new CompletionServiceHelper(_executor, _connectionManager,
serverToEndpoints);
+
+ Map<String, String> requestHeaders = Map.of("Content-Type",
"application/json");
+ CompletionServiceHelper.CompletionServiceResponse serviceResponse =
+ completionServiceHelper.doMultiPostRequest(serverURLsAndBodies,
tableNameWithType, false, requestHeaders,
+ timeoutMs, null);
+
+ List<ValidDocIdMetadataInfo> validDocIdMetadataInfos = new ArrayList<>();
+ int failedParses = 0;
+ int returnedSegmentsCount = 0;
+ for (Map.Entry<String, String> streamResponse :
serviceResponse._httpResponses.entrySet()) {
+ try {
+ String validDocIdMetadataList = streamResponse.getValue();
Review Comment:
we check the response status. If it's >= 300, we increment
`_failedResponseCount` and `_httpResponses` will be an empty map.
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