HBASE-4375 [hbck] Add region coverage visualization to hbck

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1172310 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -630,6 +630,8 @@ Release 0.90.5 - Unreleased
                in hbck. (Jonathan Hsieh)
    HBASE-4384  Hard to tell what causes failure in CloseRegionHandler#getCurrentVersion
                (Harsh J)
+   HBASE-4375  [hbck] Add region coverage visualization to hbck
+               (Jonathan Hsieh)
 
 Release 0.90.4 - August 10, 2011
 

src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java

@@ -679,9 +679,31 @@ public class HBaseFsck {
         }
         prevKey = key;
       }
+      if (details) {
+        // do full region split map dump
+        dump(sc.getSplits(), regions);
+      }
       return errors.getErrorList().size() == originalErrorsCount;
     }
 
+    /**
+     * This dumps data in a visually reasonable way for visual debugging
+     * 
+     * @param splits
+     * @param regions
+     */
+    void dump(TreeSet<byte[]> splits, Multimap<byte[], HbckInfo> regions) {
+      // we display this way because the last end key should be displayed as well.
+      for (byte[] k : splits) {
+        System.out.print(Bytes.toString(k) + ":\t");
+        for (HbckInfo r : regions.get(k)) {
+          System.out.print("[ "+ r.toString() + ", " 
+              + Bytes.toString(r.getEndKey())+ "]\t");
+        }
+        System.out.println();
+      }
+    }
+    
   }
 
   /**