GJL commented on a change in pull request #11647: [FLINK-16960][runtime] Add
PipelinedRegion interface
URL: https://github.com/apache/flink/pull/11647#discussion_r404217817
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/topology/Topology.java
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@@ -39,4 +39,26 @@
* @return whether the topology contains co-location constraints
*/
boolean containsCoLocationConstraints();
+
+ /**
+ * Returns all pipelined regions in this topology.
+ *
+ * @return Iterable over pipelined regions in this topology
+ */
+ default Iterable<PipelinedRegion<VID, RID, V, R>>
getAllPipelinedRegions() {
Review comment:
It's ugly. In the SchedulingStrategy, one will have to write:
```
final Iterable<? extends PipelinedRegion<ExecutionVertexID,
IntermediateResultPartitionID, ?, ?>> final PipelinedRegion<ExecutionVertexID,
IntermediateResultPartitionID, ?, ?> next =
allPipelinedRegions.iterator().next();
```
to iterate over the pipelined regions.
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