Github user jihoonson commented on a diff in the pull request:
https://github.com/apache/tajo/pull/20#discussion_r13179545
--- Diff: tajo-core/src/main/java/org/apache/tajo/worker/TaskHistory.java
---
@@ -18,107 +18,160 @@
package org.apache.tajo.worker;
-import org.apache.tajo.catalog.statistics.TableStats;
-import org.apache.tajo.util.FileUtil;
+import com.google.common.base.Objects;
+import com.google.common.collect.Lists;
+import org.apache.tajo.QueryUnitAttemptId;
+import org.apache.tajo.catalog.proto.CatalogProtos;
+import org.apache.tajo.common.ProtoObject;
-import java.net.URI;
-import java.util.Collection;
-import java.util.Map;
+import java.util.Collections;
+import java.util.List;
-public class TaskHistory {
+import static org.apache.tajo.TajoProtos.TaskAttemptState;
+import static org.apache.tajo.ipc.TajoWorkerProtocol.FetcherHistoryProto;
+import static org.apache.tajo.ipc.TajoWorkerProtocol.TaskHistoryProto;
+
+/**
+ * The history class for Task processing.
+ */
+public class TaskHistory implements ProtoObject<TaskHistoryProto> {
+
+ private QueryUnitAttemptId queryUnitAttemptId;
+ private TaskAttemptState state;
+ private float progress;
private long startTime;
private long finishTime;
-
- private String status;
+ private CatalogProtos.TableStatsProto inputStats;
+ private CatalogProtos.TableStatsProto outputStats;
private String outputPath;
private String workingPath;
- private float progress;
-
- private TableStats inputStats;
- private TableStats outputStats;
- Map<URI, FetcherHistory> fetchers;
+ //TAJO-846
--- End diff --
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