/* Copyright [2020] [bvn13] Licensed 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.bvn13.covid19.api.service; import com.bvn13.covid19.api.repositories.CovidStatsRepository; import com.bvn13.covid19.api.repositories.CovidUpdateInfosRepository; import com.bvn13.covid19.model.entities.CovidStat; import com.bvn13.covid19.model.entities.CovidUpdate; import lombok.RequiredArgsConstructor; import org.springframework.cache.annotation.Cacheable; import org.springframework.stereotype.Component; import javax.transaction.Transactional; import java.util.Collection; import java.util.Collections; import java.util.Optional; @RequiredArgsConstructor @Component public class CovidStatsMaker { private final CovidStatsRepository covidRepository; private final CovidUpdateInfosRepository updatesRepository; @Transactional public Collection getLastCovidStats() { return updatesRepository.findLastUpdateInfo() .flatMap(updateInfo -> updatesRepository.findFirstByCreatedOn(updateInfo.getCreatedOn())) .map(covidRepository::findAllByUpdateInfo) .orElse(Collections.emptyList()); } @Cacheable( cacheNames = "covid-last-update-info", unless = "#result == null" ) @Transactional public Optional findLastUpdateInfo() { return updatesRepository.findLastUpdateInfo() .flatMap(updateInfo -> updatesRepository.findFirstByCreatedOn(updateInfo.getCreatedOn())); } @Cacheable( cacheNames = "covid-stats-by-update-info-id", condition = "#updateInfoId > 0", unless = "#result == null || #result.size() <= 0" ) public Collection findCovidStatsByUpdateInfoId(long updateInfoId) { return covidRepository.findAllByUpdateInfo_Id(updateInfoId); } }