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EarthquakeImporter.java
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EarthquakeImporter.java
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package ch.rasc.dynamicpos;
import java.io.IOException;
import java.io.StringReader;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.util.List;
import java.util.stream.Collectors;
import org.springframework.stereotype.Service;
import com.univocity.parsers.common.record.Record;
import com.univocity.parsers.csv.CsvParser;
import com.univocity.parsers.csv.CsvParserSettings;
import jakarta.annotation.PostConstruct;
@Service
public class EarthquakeImporter {
private final ReactiveEarthquakeRepository repository;
private final CsvParser parser;
EarthquakeImporter(ReactiveEarthquakeRepository repository) {
this.repository = repository;
CsvParserSettings settings = new CsvParserSettings();
settings.setHeaderExtractionEnabled(true);
settings.setLineSeparatorDetectionEnabled(true);
this.parser = new CsvParser(settings);
}
@PostConstruct
public void read() throws IOException, InterruptedException {
HttpClient httpClient = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder().GET()
.uri(URI.create(
"https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/2.5_month.csv"))
.build();
HttpResponse<String> response = httpClient.send(request,
HttpResponse.BodyHandlers.ofString());
List<Record> records = this.parser.parseAllRecords(new StringReader(response.body()));
List<Earthquake> earthquakes = records.stream().map(Earthquake::new)
.collect(Collectors.toList());
insertData(earthquakes);
}
private void insertData(List<Earthquake> earthquakes) {
this.repository.deleteAll().then(this.repository.saveAll(earthquakes).then())
.subscribe();
}
}