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package eu.dnetlib.data.mapreduce.hbase.broker.model;
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import java.util.Date;
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import java.util.stream.Collectors;
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import org.apache.commons.codec.digest.DigestUtils;
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import org.apache.hadoop.mapreduce.Mapper;
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import org.apache.hadoop.mapreduce.Reducer;
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//Utility class, it perfoms the conversion msg -> ES entinty and provides some and manages M/R logs
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public class EventWrapper {
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private final EventMessage event;
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private final String highlightValue;
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private final String counterGroupName;
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private final String counterName;
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public static EventWrapper newInstance(final EventMessage event, final String highlightValue,
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final String counterGroupName, final String counterName) {
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return new EventWrapper(event, highlightValue, counterGroupName, counterName);
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}
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private EventWrapper(EventMessage event, String highlightValue, String counterGroupName, String counterName) {
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this.event = event;
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this.highlightValue = highlightValue;
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this.counterGroupName = counterGroupName;
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this.counterName = counterName;
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}
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public Event asBrokerEvent() {
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final Date now = new Date();
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final Event res = new Event();
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final String eventId = calculateEventId(event.getTopic(),
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event.getMap().get("target_publication_id").toString(), highlightValue);
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res.setEventId(eventId);
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res.setProducerId(event.getProducerId());
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res.setPayload(event.getPayload());
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res.setMap(event.getMap().entrySet().stream().filter(e -> e.getValue().asObject() != null)
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.collect(Collectors.toMap(e -> e.getKey(), e -> e.getValue().asObject())));
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res.setTopic(event.getTopic());
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res.setCreationDate(now);
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res.setExpiryDate(calculateExpiryDate(now, event.getTthDays()));
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res.setInstantMessage(event.getTthDays() == 0);
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return res;
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}
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private String calculateEventId(final String topic, final String publicationId, final String value) {
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return "event-" + DigestUtils.md5Hex(topic).substring(0, 6) + "-"
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+ DigestUtils.md5Hex(publicationId).substring(0, 8) + "-" + DigestUtils.md5Hex(value).substring(0, 8);
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}
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private Date calculateExpiryDate(final Date now, final int ttlDays) {
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if (ttlDays < 0) {
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return null;
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} else if (ttlDays == 0) {
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return now;
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} else {
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return new Date(now.getTime() + ttlDays * 24 * 60 * 60 * 1000);
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}
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}
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public void incrementCounter(Mapper<?, ?, ?, ?>.Context context) {
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context.getCounter(counterGroupName, counterName).increment(1);
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}
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public void incrementCounter(Reducer<?, ?, ?, ?>.Context context) {
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context.getCounter(counterGroupName, counterName).increment(1);
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}
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}
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