add moveCost

app/src/main/java/org/astraea/app/cost/HasMoveCost.java

@@ -0,0 +1,54 @@
+/*
+ * 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.astraea.app.cost;
+
+import java.util.Map;
+import org.astraea.app.admin.ClusterBean;
+import org.astraea.app.admin.ClusterInfo;
+
+public interface HasMoveCost extends CostFunction {
+  /**
+   * score migrate cost from originClusterInfo to newClusterInfo .
+   *
+   * @param originClusterInfo the clusterInfo before migrate
+   * @param newClusterInfo the mocked clusterInfo generate from balancer
+   * @param clusterBean cluster metrics
+   * @return the score of migrate cost
+   */
+  ClusterCost clusterCost(
+      ClusterInfo originClusterInfo, ClusterInfo newClusterInfo, ClusterBean clusterBean);
+
+  /**
+   * @param originClusterInfo he clusterInfo before migrate
+   * @param newClusterInfo the mocked clusterInfo generate from balancer
+   * @param clusterBean cluster metrics
+   * @return Check if the migrate plan exceeds the available hardware resources
+   */
+  boolean overflow(
+      ClusterInfo originClusterInfo, ClusterInfo newClusterInfo, ClusterBean clusterBean);
+
+  /**
+   * @param originClusterInfo
+   * @param newClusterInfo
+   * @return total migrate size of the plan
+   */
+  Map<MoveCost.ReplicaMigrateInfo, Long> totalMigrateSize(
+      ClusterInfo originClusterInfo, ClusterInfo newClusterInfo, ClusterBean clusterBean);
+
+  double estimatedMigrateTime(
+      ClusterInfo originClusterInfo, ClusterInfo newClusterInfo, ClusterBean clusterBean);
+}