| /* |
| * 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.ignite.internal.metric; |
| |
| /** |
| * Helper for gathering IO statistics. |
| */ |
| public class IoStatisticsQueryHelper { |
| /** */ |
| private static final ThreadLocal<IoStatisticsHolderQuery> CUR_QRY_STATS = new ThreadLocal<>(); |
| |
| /** |
| * Start gathering IO statistics for query. Should be used together with {@code finishGatheringQueryStatistics} |
| * method. |
| * |
| * @param qryId Identifier of query. |
| */ |
| public static void startGatheringQueryStatistics(String qryId) { |
| IoStatisticsHolderQuery currQryStatisticsHolder = CUR_QRY_STATS.get(); |
| |
| assert currQryStatisticsHolder == null : currQryStatisticsHolder; |
| |
| CUR_QRY_STATS.set(new IoStatisticsHolderQuery(qryId)); |
| } |
| |
| /** |
| * Merge query statistics. |
| * |
| * @param qryStat Statistics which will be merged to current query statistics. |
| */ |
| public static void mergeQueryStatistics(IoStatisticsHolderQuery qryStat) { |
| assert qryStat != null; |
| |
| IoStatisticsHolderQuery currQryStatisticsHolder = CUR_QRY_STATS.get(); |
| |
| assert currQryStatisticsHolder != null; |
| |
| currQryStatisticsHolder.merge(qryStat.logicalReads(), qryStat.physicalReads()); |
| } |
| |
| /** |
| * Finish gathering IO statistics for query. Should be used together with {@code startGatheringQueryStatistics} |
| * method. |
| * |
| * @return Gathered statistics. |
| */ |
| public static IoStatisticsHolder finishGatheringQueryStatistics() { |
| IoStatisticsHolderQuery currQryStatisticsHolder = CUR_QRY_STATS.get(); |
| |
| assert currQryStatisticsHolder != null; |
| |
| CUR_QRY_STATS.remove(); |
| |
| return currQryStatisticsHolder; |
| } |
| |
| /** |
| * Track logical read for current query. |
| * |
| * @param pageAddr Address of page. |
| */ |
| static void trackLogicalReadQuery(long pageAddr) { |
| IoStatisticsHolderQuery currQryStatisticsHolder = CUR_QRY_STATS.get(); |
| |
| if (currQryStatisticsHolder != null) |
| currQryStatisticsHolder.trackLogicalRead(pageAddr); |
| |
| } |
| |
| /** |
| * Track physical and logical read for current query. |
| * |
| * @param pageAddr Address of page. |
| */ |
| static void trackPhysicalAndLogicalReadQuery(long pageAddr) { |
| IoStatisticsHolderQuery currQryStatisticsHolder = CUR_QRY_STATS.get(); |
| |
| if (currQryStatisticsHolder != null) |
| currQryStatisticsHolder.trackPhysicalAndLogicalRead(pageAddr); |
| } |
| |
| } |