HBASE-5431 Improve delete marker handling in Import M/R jobs

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1290955 13f79535-47bb-0310-9956-ffa450edef68

src/main/java/org/apache/hadoop/hbase/client/Delete.java

@@ -118,25 +118,6 @@ public class Delete extends Mutation
     this.writeToWAL = d.writeToWAL;
   }
 
-  /**
-   * Advanced use only. Create a Delete object based on a KeyValue
-   * of type "delete".
-   * @param kv
-   * @throws IOException
-   */
-  public Delete(KeyValue kv) throws IOException {
-    this(kv.getRow(), kv.getTimestamp(), null);
-    if (!kv.isDelete()) {
-      throw new IOException("The recently added KeyValue is not of type "
-          + "delete. Rowkey: " + Bytes.toStringBinary(this.row));
-    }
-    // can't use singletonList, because this might be modified at the server by
-    // coprocessors
-    ArrayList<KeyValue> list = new ArrayList<KeyValue>(1);
-    list.add(kv);
-    familyMap.put(kv.getFamily(), list);
-  }
-
   /**
    * Advanced use only.
    * Add an existing delete marker to this Delete object.

src/main/java/org/apache/hadoop/hbase/mapreduce/Import.java

@@ -74,6 +74,7 @@ public class Import {
     private void writeResult(ImmutableBytesWritable key, Result result, Context context)
     throws IOException, InterruptedException {
       Put put = null;
+      Delete delete = null;
       for (KeyValue kv : result.raw()) {
         if(cfRenameMap != null) {
             // If there's a rename mapping for this CF, create a new KeyValue
@@ -95,13 +96,13 @@ public class Import {
                         kv.getValueLength());     // value length
             } 
         }
+        // Deletes and Puts are gathered and written when finished
         if (kv.isDelete()) {
-          // Deletes need to be written one-by-one,
-          // since family deletes overwrite column(s) deletes
-          context.write(key, new Delete(kv));
+          if (delete == null) {
+            delete = new Delete(key.get());
+          }
+          delete.addDeleteMarker(kv);
         } else {
-          // Puts are gathered into a single Put object
-          // and written when finished
           if (put == null) { 
             put = new Put(key.get());
           }
@@ -111,6 +112,9 @@ public class Import {
       if (put != null) {
         context.write(key, put);
       }
+      if (delete != null) {
+        context.write(key, delete);
+      }
     }
 
     @Override