shanthoosh commented on a change in pull request #990: SAMZA-2161: Move 
ChangelogPartitionManager and CoordinatorStream ConfigReader to MetadataStore.
URL: https://github.com/apache/samza/pull/990#discussion_r274058827
 
 

 ##########
 File path: 
samza-core/src/main/scala/org/apache/samza/checkpoint/CheckpointTool.scala
 ##########
 @@ -126,8 +127,9 @@ object CheckpointTool {
   }
 
   def apply(config: Config, offsets: TaskNameToCheckpointMap): CheckpointTool 
= {
-    val coordinatorStreamManager = new CoordinatorStreamManager(config, new 
MetricsRegistryMap())
-    new CheckpointTool(offsets, coordinatorStreamManager)
+    val metadataStore: CoordinatorStreamStore = new 
CoordinatorStreamStore(config, new MetricsRegistryMap())
+    metadataStore.init()
 
 Review comment:
   Helps to build unit tests easily by injecting a mock MetadataStore as a 
dependency into the checkpointTool#run method. 

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