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package com.example.athena.tickit.service; | |
import com.example.athena.common.AthenaClientFactory; | |
import com.example.athena.common.AthenaCommon; | |
import com.example.athena.config.ConfigProperties; | |
import com.example.athena.tickit.model.saas.Event; | |
import org.slf4j.Logger; | |
import org.slf4j.LoggerFactory; | |
import org.springframework.beans.factory.annotation.Autowired; | |
import org.springframework.stereotype.Service; | |
import software.amazon.awssdk.services.athena.AthenaClient; | |
import software.amazon.awssdk.services.athena.model.*; | |
import software.amazon.awssdk.services.athena.paginators.GetQueryResultsIterable; | |
import java.time.LocalDateTime; | |
import java.time.format.DateTimeFormatter; | |
import java.util.ArrayList; | |
import java.util.List; | |
import static java.lang.Integer.parseInt; | |
@Service | |
public class EventServiceImp implements EventService { | |
private static final Logger logger = LoggerFactory.getLogger(EventServiceImp.class); | |
private final ConfigProperties configProperties; | |
private final AthenaClientFactory athenaClientFactory; | |
private final AthenaCommon athenaCommon; | |
@Autowired | |
public EventServiceImp(ConfigProperties configProperties, AthenaClientFactory athenaClientFactory, AthenaCommon athenaCommon) { | |
this.configProperties = configProperties; | |
this.athenaClientFactory = athenaClientFactory; | |
this.athenaCommon = athenaCommon; | |
} | |
public List<Event> findAll(Integer limit, Integer offset) { | |
if (limit == null || limit < 1 || limit > configProperties.getLimit()) { | |
limit = configProperties.getLimit(); | |
} | |
if (offset == null || offset < 1) { | |
offset = 0; | |
} | |
String whereClause = "WHERE eventid IS NOT NULL"; | |
String query = String.format(""" | |
SELECT * | |
FROM refined_tickit_public_event | |
%s | |
ORDER BY eventid | |
OFFSET %s | |
LIMIT %s;""", whereClause, offset, limit); | |
return startQuery(query); | |
} | |
public Event findById(int id) { | |
String query = String.format(""" | |
SELECT DISTINCT * | |
FROM refined_tickit_public_event | |
WHERE eventid=%s""", id); | |
Event event; | |
try { | |
event = startQuery(query).get(0); | |
} catch (IndexOutOfBoundsException e) { | |
logger.error(e.getMessage()); | |
return null; | |
} | |
return event; | |
} | |
private List<Event> startQuery(String query) { | |
logger.debug(String.format("Query: %s", query.replace("\n", " "))); | |
AthenaClient athenaClient = athenaClientFactory.createClient(); | |
String queryExecutionId = athenaCommon.submitAthenaQuery(athenaClient, query); | |
athenaCommon.waitForQueryToComplete(athenaClient, queryExecutionId); | |
List<Event> events = processResultRows(athenaClient, queryExecutionId); | |
athenaClient.close(); | |
return events; | |
} | |
private List<Event> processResultRows(AthenaClient athenaClient, String queryExecutionId) { | |
List<Event> events = new ArrayList<>(); | |
try { | |
// Max Results can be set but if it's not set, | |
// it will choose the maximum page size | |
GetQueryResultsRequest getQueryResultsRequest = GetQueryResultsRequest.builder() | |
.queryExecutionId(queryExecutionId).build(); | |
GetQueryResultsIterable getQueryResultsResults = athenaClient.getQueryResultsPaginator(getQueryResultsRequest); | |
List<Row> rows; | |
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.S"); | |
for (GetQueryResultsResponse result : getQueryResultsResults) { | |
rows = result.resultSet().rows(); | |
for (Row myRow : rows.subList(1, rows.size())) { // skip first row - column names | |
List<Datum> allData = myRow.data(); | |
Event event = new Event(); | |
event.setId(parseInt(allData.get(0).varCharValue())); | |
event.setVenueId(parseInt(allData.get(1).varCharValue())); | |
event.setCatId(parseInt(allData.get(2).varCharValue())); | |
event.setDateId(parseInt(allData.get(3).varCharValue())); | |
event.setName(allData.get(4).varCharValue()); | |
event.setStartTime(LocalDateTime.parse(allData.get(5).varCharValue(), formatter)); | |
events.add(event); | |
} | |
} | |
} catch (AthenaException e) { | |
logger.error(e.getMessage()); | |
} | |
return events; | |
} | |
} |
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