[GitHub] [incubator-celeborn] FMX commented on a diff in pull request #970: [CELEBORN-3] Add metrics for top disk usage apps for version 0.1.x.

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

FMX commented on code in PR #970:
URL: https://github.com/apache/incubator-celeborn/pull/970#discussion_r1022861103


##########
server-master/src/main/java/com/aliyun/emr/rss/service/deploy/master/metrics/AppDiskUsageMetric.scala:
##########
@@ -0,0 +1,143 @@
+/*
+ * 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 com.aliyun.emr.rss.service.deploy.master.metrics
+
+import java.util
+import java.util.concurrent.TimeUnit
+import java.util.concurrent.atomic.AtomicReference
+import com.aliyun.emr.rss.common.RssConf
+import com.aliyun.emr.rss.common.internal.Logging
+import com.aliyun.emr.rss.common.meta.WorkerInfo
+import com.aliyun.emr.rss.common.util.{ThreadUtils, Utils}
+
+import java.time.LocalDateTime
+import scala.collection.JavaConverters.{iterableAsScalaIterableConverter, mapAsScalaMapConverter}
+
+case class AppDiskUsage(var appId: String, var usage: Long) {
+  override def toString: String = s"Application ${appId} used ${Utils.bytesToString(usage)} "
+}
+
+class AppDiskUsageSnapShot(val topItemCount: Int) extends Logging {
+  val topNItems = new Array[AppDiskUsage](topItemCount)
+  val startSnapShotTime = LocalDateTime.now()
+  var endSnapShotTime: LocalDateTime = _
+
+  def commit(): Unit = {
+    endSnapShotTime = LocalDateTime.now()
+  }
+
+  def updateAppDiskUsage(appId: String, usage: Long): Unit = {
+    val dropIndex = topNItems.indexWhere(usage => usage != null && usage.appId == appId)
+    if (dropIndex != -1) {
+      drop(dropIndex)
+    }
+    val insertIndex = findInsertPosition(usage)
+    if (insertIndex != -1) {
+      shift(insertIndex)
+      topNItems(insertIndex) = AppDiskUsage(appId, usage)
+    }
+  }
+
+  def shift(index: Int): Unit = {
+    for (i <- topItemCount - 1 until index by -1) {
+      topNItems(i) = topNItems(i - 1)
+    }
+  }
+
+  def drop(index: Int): Unit = {
+    for (i <- index until topItemCount - 1) {
+      topNItems(i) = topNItems(i + 1)
+    }

Review Comment:
   Done.



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