If user specifies an interval of 0, convert aggregation to NONE

This prevents an endless loop that can hang up the server, and is probably what the user intuitively wanted.
Merge remote-tracking branch 'origin/zero_interval' into zero_interval


Fix merge issue


Fix whitespace to match original


More whitespace

extensions-core/src/main/java/org/thingsboard/server/extensions/core/plugin/telemetry/handlers/TelemetryRestMsgHandler.java

@@ -134,7 +134,10 @@ public class TelemetryRestMsgHandler extends DefaultRestMsgHandler {
                 msg.getResponseHolder().setResult(new ResponseEntity<>(HttpStatus.BAD_REQUEST));
                 return;
             }
-            Aggregation agg = Aggregation.valueOf(request.getParameter("agg", Aggregation.NONE.name()));
+
+            // If interval is 0, convert this to a NONE aggregation, which is probably what the user really wanted
+            Aggregation agg = (interval.isPresent() && interval.get() == 0) ? Aggregation.valueOf(Aggregation.NONE.name()) :
+                                                                              Aggregation.valueOf(request.getParameter("agg", Aggregation.NONE.name()));
 
             List<TsKvQuery> queries = keys.stream().map(key -> new BaseTsKvQuery(key, startTs.get(), endTs.get(), interval.get(), limit.orElse(TelemetryWebsocketMsgHandler.DEFAULT_LIMIT), agg))
                     .collect(Collectors.toList());