HBASE-13711 Provide an API to set min and max versions in HColumnDescriptor (Stephen Yuan Jiang)

hbase-client/src/main/java/org/apache/hadoop/hbase/HColumnDescriptor.java

@@ -504,6 +504,30 @@ public class HColumnDescriptor implements Comparable<HColumnDescriptor> {
     return this;
   }
 
+  /**
+   * Set minimum and maximum versions to keep
+   *
+   * @param minVersions minimal number of versions
+   * @param maxVersions maximum number of versions
+   * @return this (for chained invocation)
+   */
+  public HColumnDescriptor setVersions(int minVersions, int maxVersions) {
+    if (minVersions <= 0) {
+      // TODO: Allow minVersion and maxVersion of 0 to be the way you say "Keep all versions".
+      // Until there is support, consider 0 or < 0 -- a configuration error.
+      throw new IllegalArgumentException("Minimum versions must be positive");
+    }
+
+    if (maxVersions < minVersions) {
+      throw new IllegalArgumentException("Unable to set MaxVersion to " + maxVersions
+        + " and set MinVersion to " + minVersions
+        + ", as maximum versions must be >= minimum versions.");
+    }
+    setMinVersions(minVersions);
+    setMaxVersions(maxVersions);
+    return this;
+  }
+
   /**
    * @return The storefile/hfile blocksize for this column family.
    */

hbase-it/src/test/java/org/apache/hadoop/hbase/chaos/actions/ChangeVersionsAction.java

@@ -59,8 +59,7 @@ public class ChangeVersionsAction extends Action {
 
     int versions =  random.nextInt(3) + 1;
     for(HColumnDescriptor descriptor:columnDescriptors) {
-      descriptor.setMaxVersions(versions);
-      descriptor.setMinVersions(versions);
+      descriptor.setVersions(versions, versions);
     }
     LOG.debug("Performing action: Changing versions on " + tableName.getNameAsString());
     admin.modifyTable(tableName, tableDescriptor);