[GitHub] [helix] pkuwm commented on a change in pull request #1154: Add initial callback when adding routing table listener

[GitBox <gi...@apache.org>]

pkuwm commented on a change in pull request #1154:
URL: https://github.com/apache/helix/pull/1154#discussion_r464013101



##########
File path: helix-core/src/main/java/org/apache/helix/spectator/RoutingTableProvider.java
##########
@@ -403,16 +403,55 @@ public RoutingTableSnapshot getRoutingTableSnapshot(PropertyType propertyType, S
     return snapshots;
   }
 
+
   /**
    * Add RoutingTableChangeListener with user defined context
    * @param routingTableChangeListener
    * @param context user defined context
    */
   public void addRoutingTableChangeListener(
       final RoutingTableChangeListener routingTableChangeListener, Object context) {
+    addRoutingTableChangeListener(routingTableChangeListener, context, false);
+  }
+
+  /**
+   * Add RoutingTableChangeListener with user defined context
+   * @param routingTableChangeListener
+   * @param context user defined context
+   * @param doInit whether to trigger the initial callback during adding listener
+   */
+  public void addRoutingTableChangeListener(
+      final RoutingTableChangeListener routingTableChangeListener, Object context, boolean doInit) {
     _routingTableChangeListenerMap.put(routingTableChangeListener, new ListenerContext(context));
     logger.info("Attach RoutingTableProviderChangeListener {}",
         routingTableChangeListener.getClass().getName());
+    if (doInit) {
+      if (_sourceDataTypeMap.isEmpty()) {

Review comment:
       @zhangmeng916  Then are we checking null for sourceMap in validateSourceDataTypeMap?




----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

For queries about this service, please contact Infrastructure at:
users@infra.apache.org



---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscribe@helix.apache.org
For additional commands, e-mail: reviews-help@helix.apache.org