wonook commented on a change in pull request #191: [NEMO-332] Refactor
RunTimePass
URL: https://github.com/apache/incubator-nemo/pull/191#discussion_r252922464
##########
File path:
common/src/main/java/org/apache/nemo/common/ir/vertex/system/SystemIRVertex.java
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@@ -16,14 +16,20 @@
* specific language governing permissions and limitations
* under the License.
*/
-package org.apache.nemo.common;
+package org.apache.nemo.common.ir.vertex.system;
-import java.io.Serializable;
+import org.apache.nemo.common.ir.vertex.OperatorVertex;
+import org.apache.nemo.common.ir.vertex.transform.Transform;
/**
- * A serializable metric factory.
- *
- * @param <T> metric type.
+ * System vertices can be dynamically inserted into an IRDAG to optimize
execution.
*/
-public interface MetricFactory<T> extends Serializable {
+abstract class SystemIRVertex extends OperatorVertex {
Review comment:
What's a `system vertex`? Is this a commonly used term?
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