Github user aljoscha commented on a diff in the pull request:
https://github.com/apache/flink/pull/879#discussion_r33864229
--- Diff:
flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/runtime/streamrecord/StreamRecord.java
---
@@ -17,87 +17,104 @@
package org.apache.flink.streaming.runtime.streamrecord;
-import java.io.Serializable;
-
-import org.apache.flink.api.java.functions.KeySelector;
-import org.apache.flink.api.java.tuple.Tuple;
+import org.joda.time.Instant;
/**
- * Object for wrapping a tuple or other object with ID used for sending
records
- * between streaming task in Apache Flink stream processing.
+ * One value in a data stream. This stores the value and the associated
timestamp.
*/
-public class StreamRecord<T> implements Serializable {
- private static final long serialVersionUID = 1L;
+public class StreamRecord<T> {
- private T streamObject;
- public boolean isTuple;
+ // We store it as Object so that we can reuse a StreamElement for
emitting
+ // elements of a different type while still reusing the timestamp.
+ private Object value;
--- End diff --
But then it just requires casts in another place...
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