Github user ebautistabar commented on a diff in the pull request:
https://github.com/apache/flink/pull/930#discussion_r35202994
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/executiongraph/ExecutionGraph.java
---
@@ -580,6 +581,34 @@ public ExecutionContext getExecutionContext() {
return result;
}
+ /**
+ * Returns the a stringified version of the user-defined accumulators.
+ * @return an Array containing the StringifiedAccumulatorResult objects
+ */
+ public StringifiedAccumulatorResult[]
getAccumulatorResultsStringified() {
+
+ Map<String, Accumulator<?, ?>> accumulatorMap =
aggregateUserAccumulators();
+
+ int num = accumulatorMap.size();
+ StringifiedAccumulatorResult[] resultStrings = new
StringifiedAccumulatorResult[num];
+
+ int i = 0;
+ for (Map.Entry<String, Accumulator<?, ?>> entry :
accumulatorMap.entrySet()) {
+
+ StringifiedAccumulatorResult result;
+ Accumulator<?, ?> value = entry.getValue();
+ if (value != null) {
+ result = new
StringifiedAccumulatorResult(entry.getKey(), value.getClass().getSimpleName(),
value.toString());
+ } else {
+ result = new
StringifiedAccumulatorResult(entry.getKey(), "null", "null");
--- End diff --
Why do you use the string `"null"` instead of `null`?
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