Github user rmetzger commented on a diff in the pull request:
https://github.com/apache/flink/pull/2350#discussion_r75298087
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/operators/StreamSource.java
---
@@ -146,16 +146,24 @@ void checkAsyncException() {
private final Output<StreamRecord<T>> output;
private final StreamRecord<T> reuse;
- public NonTimestampContext(StreamSource<?, ?> owner, Object
lockingObject, Output<StreamRecord<T>> output) {
- this.owner = owner;
+ public NonTimestampContext(AbstractStreamOperator<T> owner,
Object lockingObject, Output<StreamRecord<T>> output) {
this.lockingObject = lockingObject;
this.output = output;
this.reuse = new StreamRecord<T>(null);
+
+ // if it is a source, then we cast and cache it
+ // here so that we do not have to do it in every
collect(),
+ // collectWithTimestamp() and emitWatermark()
+
+ this.owner = (owner instanceof StreamSource) ?
+ (StreamSource) owner : null;
--- End diff --
For the file reader, the method can just be empty
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