[GitHub] seojangho commented on a change in pull request #1: [NEMO-26] Implement SourceLocationAwareSchedulingPolicy

[GitBox <gi...@apache.org>]

seojangho commented on a change in pull request #1: [NEMO-26] Implement SourceLocationAwareSchedulingPolicy
URL: https://github.com/apache/incubator-nemo/pull/1#discussion_r172753133
 
 

 ##########
 File path: common/src/main/java/edu/snu/nemo/common/ir/Readable.java
 ##########
 @@ -28,5 +30,15 @@
    * @throws Exception exception while reading data.
    */
   Iterable<O> read() throws Exception;
+
+  /**
+   * Returns the list of locations where this readable resides.
+   * Each location has a complete copy of the readable.
+   * @return List of locations where this readable resides, or an empty list if this operation is not supported
+   * @throws Exception exceptions on the way
+   */
+  default List<String> getLocations() throws Exception {
 
 Review comment:
   It will introduce some redundant lines in our current codebase, but with long-term view, you have the point.

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