jeongyooneo commented on a change in pull request #191: [NEMO-332] Refactor
RunTimePass
URL: https://github.com/apache/incubator-nemo/pull/191#discussion_r252133096
##########
File path:
common/src/main/java/org/apache/nemo/common/partitioner/Partitioner.java
##########
@@ -46,40 +47,34 @@
K partition(Object element);
/**
- * Gets appropriate partitioner for an edge.
- *
- * @param runtimeEdge the runtime edge.
- * @return the partitioner for the edge.
+ * @param edgeProperties edge properties.
+ * @param dstProperties vertex properties.
+ * @return the partitioner.
*/
- static Partitioner getPartitioner(final RuntimeEdge runtimeEdge) {
- final StageEdge stageEdge = (StageEdge) runtimeEdge;
- final PartitionerProperty.Value partitionerPropertyValue =
- (PartitionerProperty.Value)
runtimeEdge.getPropertyValueOrRuntimeException(PartitionerProperty.class);
- final int dstParallelism =
- stageEdge.getDstIRVertex().getPropertyValue(ParallelismProperty.class)
- .orElseThrow(() -> new RuntimeException("No parallelism in edge " +
runtimeEdge.getId()));
-
+ static Partitioner getPartitioner(final
ExecutionPropertyMap<EdgeExecutionProperty> edgeProperties,
+ final
ExecutionPropertyMap<VertexExecutionProperty> dstProperties) {
+ final PartitionerProperty.Type type =
+ edgeProperties.get(PartitionerProperty.class).get().left();
final Partitioner partitioner;
- switch (partitionerPropertyValue) {
- case IntactPartitioner:
+ switch (type) {
+ case Intact:
partitioner = new IntactPartitioner();
break;
- case HashPartitioner:
- final KeyExtractor hashKeyExtractor =
- (KeyExtractor)
runtimeEdge.getPropertyValueOrRuntimeException(KeyExtractorProperty.class);
- partitioner = new HashPartitioner(dstParallelism, hashKeyExtractor);
- break;
- case DataSkewHashPartitioner:
- final KeyExtractor dataSkewKeyExtractor =
- (KeyExtractor)
runtimeEdge.getPropertyValueOrRuntimeException(KeyExtractorProperty.class);
- partitioner = new DataSkewHashPartitioner(dstParallelism,
dataSkewKeyExtractor);
- break;
- case DedicatedKeyPerElementPartitioner:
+ case DedicatedKeyPerElement:
partitioner = new DedicatedKeyPerElementPartitioner();
break;
+ case Hash:
+ final int numOfPartitions =
edgeProperties.get(PartitionerProperty.class).get().right();
+ // If AUTO, use the number of destination parallelism to minimize the
number of partitions
Review comment:
Maybe copy this comment to the definition of AUTO_NUMBER_OF_PARTITIONS?
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