| /* |
| * 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.skywalking.oap.server.core.query; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import org.apache.skywalking.oap.server.core.query.input.Duration; |
| import org.apache.skywalking.oap.server.core.query.input.TopNCondition; |
| import org.apache.skywalking.oap.server.core.query.type.SelectedRecord; |
| import org.apache.skywalking.oap.server.core.storage.StorageModule; |
| import org.apache.skywalking.oap.server.core.storage.annotation.ValueColumnMetadata; |
| import org.apache.skywalking.oap.server.core.storage.query.ITopNRecordsQueryDAO; |
| import org.apache.skywalking.oap.server.library.module.ModuleManager; |
| import org.apache.skywalking.oap.server.library.module.Service; |
| |
| public class TopNRecordsQueryService implements Service { |
| private final ModuleManager moduleManager; |
| private ITopNRecordsQueryDAO topNRecordsQueryDAO; |
| |
| public TopNRecordsQueryService(ModuleManager manager) { |
| this.moduleManager = manager; |
| } |
| |
| private ITopNRecordsQueryDAO getTopNRecordsQueryDAO() { |
| if (topNRecordsQueryDAO == null) { |
| this.topNRecordsQueryDAO = moduleManager.find(StorageModule.NAME) |
| .provider() |
| .getService(ITopNRecordsQueryDAO.class); |
| } |
| return topNRecordsQueryDAO; |
| } |
| |
| public List<SelectedRecord> readSampledRecords(TopNCondition condition, Duration duration) throws IOException { |
| return getTopNRecordsQueryDAO().readSampledRecords( |
| condition, ValueColumnMetadata.INSTANCE.getValueCName(condition.getName()), duration); |
| } |
| } |