kfaraz commented on code in PR #16217:
URL: https://github.com/apache/druid/pull/16217#discussion_r1545932328
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indexing-service/src/main/java/org/apache/druid/indexing/common/TaskReport.java:
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@@ -48,13 +51,29 @@ public interface TaskReport
/**
* Returns an order-preserving map that is suitable for passing into {@link
TaskReportFileWriter#write}.
*/
- static Map<String, TaskReport> buildTaskReports(TaskReport... taskReports)
+ static ReportMap buildTaskReports(TaskReport... taskReports)
{
- // Use LinkedHashMap to preserve order of the reports.
- Map<String, TaskReport> taskReportMap = new LinkedHashMap<>();
+ ReportMap taskReportMap = new ReportMap();
for (TaskReport taskReport : taskReports) {
taskReportMap.put(taskReport.getReportKey(), taskReport);
}
return taskReportMap;
}
+
+ /**
+ * Represents an ordered map from report key to a TaskReport that is
compatible
+ * for writing out reports to files or serving over HTTP.
+ * <p>
+ * This class is needed for Jackson serde to work correctly. Without this
class,
+ * a TaskReport is serialized without the type information and cannot be
+ * deserialized back into a concrete implementation.
+ */
+ class ReportMap extends LinkedHashMap<String, TaskReport>
Review Comment:
No, I can add a test to verify the order. Although, I don't see any actual
task writing a report map that contains multiple entries.
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