| /* |
| * 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 java.util.Objects; |
| import java.util.stream.Collectors; |
| |
| import org.apache.skywalking.oap.server.core.query.input.Duration; |
| import org.apache.skywalking.oap.server.core.query.input.RecordCondition; |
| import org.apache.skywalking.oap.server.core.query.input.TopNCondition; |
| import org.apache.skywalking.oap.server.core.query.type.Record; |
| 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.IRecordsQueryDAO; |
| 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 IRecordsQueryDAO recordsQueryDAO; |
| |
| public TopNRecordsQueryService(ModuleManager manager) { |
| this.moduleManager = manager; |
| } |
| |
| private IRecordsQueryDAO getRecordsQueryDAO() { |
| if (recordsQueryDAO == null) { |
| this.recordsQueryDAO = moduleManager.find(StorageModule.NAME) |
| .provider() |
| .getService(IRecordsQueryDAO.class); |
| } |
| return recordsQueryDAO; |
| } |
| |
| public List<SelectedRecord> readSampledRecords(TopNCondition condition, Duration duration) throws IOException { |
| final List<Record> records = getRecordsQueryDAO().readRecords( |
| new RecordCondition(condition), ValueColumnMetadata.INSTANCE.getValueCName(condition.getName()), duration); |
| return records.stream().filter(Objects::nonNull).map(Record::toSelectedRecord).collect(Collectors.toList()); |
| } |
| } |