[GitHub] [helix] dasahcc commented on a change in pull request #341: Initial checking for the Weight-Aware Globally-Even Distribute rebalancer

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

dasahcc commented on a change in pull request #341: Initial checking for the Weight-Aware Globally-Even Distribute rebalancer
URL: https://github.com/apache/helix/pull/341#discussion_r305171886
 
 

 ##########
 File path: helix-core/src/main/java/org/apache/helix/api/rebalancer/waged/constraints/SoftConstraint.java
 ##########
 @@ -0,0 +1,49 @@
+package org.apache.helix.api.rebalancer.waged.constraints;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import org.apache.helix.controller.rebalancer.waged.model.AssignableNode;
+import org.apache.helix.controller.rebalancer.waged.model.AssignableReplica;
+import org.apache.helix.controller.rebalancer.waged.model.ClusterContext;
+
+/**
+ * Evaluate a partition allocation proposal and return a score within the normalized range.
+ * A higher score means the proposal is more preferred.
+ */
+public interface SoftConstraint {
+  float MIN_SCORE = -1000.0f;
+  float MAX_SCORE = 1000.0f;
 
 Review comment:
   Reason for float not double here? 

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