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Add Connector for ValidationRules, ValueSets and CountryList
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src/main/java/eu/europa/ec/dgc/gateway/connector/DgcGatewayCountryListDownloadConnector.java
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| /*- | ||
| * ---license-start | ||
| * EU Digital Green Certificate Gateway Service / dgc-lib | ||
| * --- | ||
| * Copyright (C) 2021 T-Systems International GmbH and all other contributors | ||
| * --- | ||
| * 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. | ||
| * ---license-end | ||
| */ | ||
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| package eu.europa.ec.dgc.gateway.connector; | ||
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| import eu.europa.ec.dgc.gateway.connector.client.DgcGatewayConnectorRestClient; | ||
| import eu.europa.ec.dgc.gateway.connector.config.DgcGatewayConnectorConfigProperties; | ||
| import feign.FeignException; | ||
| import java.security.Security; | ||
| import java.time.LocalDateTime; | ||
| import java.time.temporal.ChronoUnit; | ||
| import java.util.ArrayList; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
| import javax.annotation.PostConstruct; | ||
| import lombok.Getter; | ||
| import lombok.RequiredArgsConstructor; | ||
| import lombok.extern.slf4j.Slf4j; | ||
| import org.bouncycastle.jce.provider.BouncyCastleProvider; | ||
| import org.springframework.beans.factory.config.ConfigurableBeanFactory; | ||
| import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty; | ||
| import org.springframework.context.annotation.Lazy; | ||
| import org.springframework.context.annotation.Scope; | ||
| import org.springframework.http.HttpStatus; | ||
| import org.springframework.http.ResponseEntity; | ||
| import org.springframework.scheduling.annotation.EnableScheduling; | ||
| import org.springframework.stereotype.Service; | ||
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| @ConditionalOnProperty("dgc.gateway.connector.enabled") | ||
| @Lazy | ||
| @Service | ||
| @Scope(ConfigurableBeanFactory.SCOPE_SINGLETON) | ||
| @RequiredArgsConstructor | ||
| @EnableScheduling | ||
| @Slf4j | ||
| public class DgcGatewayCountryListDownloadConnector { | ||
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| private final DgcGatewayConnectorRestClient dgcGatewayConnectorRestClient; | ||
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| private final DgcGatewayConnectorConfigProperties properties; | ||
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| @Getter | ||
| private LocalDateTime lastUpdated = null; | ||
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| private List<String> countryList = new ArrayList<>(); | ||
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| @PostConstruct | ||
| void init() { | ||
| Security.addProvider(new BouncyCastleProvider()); | ||
| } | ||
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| /** | ||
| * Gets the list of downloaded Country Codes. | ||
| * This call will return a cached list if caching is enabled. | ||
| * If cache is outdated a refreshed list will be returned. | ||
| * | ||
| * @return List of {@link String} | ||
| */ | ||
| public List<String> getCountryList() { | ||
| updateIfRequired(); | ||
| return Collections.unmodifiableList(countryList); | ||
| } | ||
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| private synchronized void updateIfRequired() { | ||
| if (lastUpdated == null | ||
| || ChronoUnit.SECONDS.between(lastUpdated, LocalDateTime.now()) >= properties.getMaxCacheAge()) { | ||
| log.info("Maximum age of cache reached. Fetching new CountryList from DGCG."); | ||
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| countryList = new ArrayList<>(); | ||
| fetchCountryList(); | ||
| log.info("CountryList contains {} country codes.", countryList.size()); | ||
| } else { | ||
| log.debug("Cache needs no refresh."); | ||
| } | ||
| } | ||
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| private void fetchCountryList() { | ||
| log.info("Fetching CountryList from DGCG"); | ||
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| ResponseEntity<List<String>> responseEntity; | ||
| try { | ||
| responseEntity = dgcGatewayConnectorRestClient.downloadCountryList(); | ||
| } catch (FeignException e) { | ||
| log.error("Download of CountryList failed. DGCG responded with status code: {}", | ||
| e.status()); | ||
| return; | ||
| } | ||
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| List<String> downloadedCountries = responseEntity.getBody(); | ||
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| if (responseEntity.getStatusCode() != HttpStatus.OK || downloadedCountries == null) { | ||
| log.error("Download of CountryList failed. DGCG responded with status code: {}", | ||
| responseEntity.getStatusCode()); | ||
| return; | ||
| } else { | ||
| log.info("Got Response from DGCG, Downloaded Countries: {}", downloadedCountries.size()); | ||
| } | ||
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| countryList = downloadedCountries; | ||
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| lastUpdated = LocalDateTime.now(); | ||
| log.info("Put {} country codes CountryList", countryList.size()); | ||
| } | ||
| } |
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