sunhelly commented on a change in pull request #323: HBASE-22414 Interruption
of moving regions in RSGroup will cause regi…
URL: https://github.com/apache/hbase/pull/323#discussion_r297953890
##########
File path:
hbase-rsgroup/src/main/java/org/apache/hadoop/hbase/rsgroup/RSGroupAdminServer.java
##########
@@ -193,76 +198,104 @@ private void checkServersAndTables(Set<Address>
servers, Set<TableName> tables,
}
}
+ private enum MoveType {
+ TO, FROM
+ }
+
/**
- * Move every region from servers which are currently located on these
servers,
- * but should not be located there.
+ * When move a table to a group, all regions of it must be moved to group
servers (to the group).
+ * When move a server to a group, some regions on it which are of tables
that do not belong to
+ * the target group must be moved (from the group).
+ * So MoveType.TO means TableName set, and MoveType.FROM means server
Address set.
*
- * @param servers the servers that will move to new group
- * @param targetGroupName the target group name
- * @throws IOException if moving the server and tables fail
+ * @param set it's a table set or a server set
+ * @param targetGroupName target group name
+ * @param type type of move regions
+ * @param <T> the type of elements in Set
+ * @throws IOException if move haven't succeed even after max number of
retries
*/
- private void moveServerRegionsFromGroup(Set<Address> servers, String
targetGroupName)
+ private <T> void moveRegionsToOrFromGroup(Set<T> set, String
targetGroupName, MoveType type)
throws IOException {
Review comment:
I think added To/From to method name makes codes more easy to be understood.
And just like writing in the docs, TO means move tables regions, FROM means
move server regions.
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