[GitHub] [pinot] yuanbenson commented on a diff in pull request #9309: Introduce Segment AssignmentStrategy Interface

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

yuanbenson commented on code in PR #9309:
URL: https://github.com/apache/pinot/pull/9309#discussion_r961188711


##########
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/assignment/segment/strategy/BalanceNumSegmentAssignmentStrategy.java:
##########
@@ -0,0 +1,82 @@
+/**
+ * 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.
+ */
+package org.apache.pinot.controller.helix.core.assignment.segment.strategy;
+
+import com.google.common.base.Preconditions;
+import java.util.List;
+import java.util.Map;
+import org.apache.helix.HelixManager;
+import org.apache.pinot.common.assignment.InstancePartitions;
+import org.apache.pinot.controller.helix.core.assignment.segment.SegmentAssignmentUtils;
+import org.apache.pinot.spi.config.table.TableConfig;
+import org.apache.pinot.spi.config.table.assignment.InstancePartitionsType;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+
+/**
+ * Balance num Segment assignment strategy class for offline segment assignment
+ * <ul>
+ *   <li>
+ *     <p>This segment assignment strategy is used when table replication/ num_replica_groups = 1.</p>
+ *   </li>
+ * </ul>
+ */
+public class BalanceNumSegmentAssignmentStrategy implements SegmentAssignmentStrategy {
+  private static final Logger LOGGER = LoggerFactory.getLogger(BalanceNumSegmentAssignmentStrategy.class);
+
+  private String _tableName;
+  private int _replication;
+
+  @Override
+  public void init(HelixManager helixManager, TableConfig tableConfig) {
+    _tableName = tableConfig.getTableName();
+    _replication = tableConfig.getValidationConfig().getReplicationNumber();
+    LOGGER.info("Initialized OfflineBalanceNumSegmentAssignmentStrategy for table: "
+            + "{} with replication: {}", _tableName, _tableName, _replication);

Review Comment:
   ```suggestion
               + "{} with replication: {}", _tableName, _replication);
   ```



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