Created
June 11, 2022 12:09
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Overriden eventStorage engine
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| private List<Object[]> getEvents(GapAwareTrackingToken previousToken, int batchSize) { | |
| List<Object[]> events = new ArrayList<>(); | |
| if (!Objects.isNull(previousToken) && !previousToken.getGaps().isEmpty()) { | |
| List<Object[]> gapResult = entityManager() | |
| .createQuery("SELECT e.globalIndex, e.type, e.aggregateIdentifier, e.sequenceNumber, e.eventIdentifier, " + "e.timeStamp, e.payloadType, e.payloadRevision, e.payload, e.metaData " + "FROM " + domainEventEntryEntityName() + " e " + "WHERE e.globalIndex IN :gaps ORDER BY e.globalIndex ASC", Object[].class) | |
| .setParameter("gaps", previousToken.getGaps()) | |
| .setMaxResults(batchSize) | |
| .getResultList(); | |
| events.addAll(gapResult); | |
| } | |
| List<Object[]> indexResult = entityManager() | |
| .createQuery("SELECT e.globalIndex, e.type, e.aggregateIdentifier, e.sequenceNumber, e.eventIdentifier, " + "e.timeStamp, e.payloadType, e.payloadRevision, e.payload, e.metaData " + "FROM " + domainEventEntryEntityName() + " e " + "WHERE e.globalIndex > :token ORDER BY e.globalIndex ASC", Object[].class) | |
| .setParameter("token", previousToken == null ? -1L : previousToken.getIndex()) | |
| .setMaxResults(batchSize - events.size()) | |
| .getResultList(); | |
| events.addAll(indexResult); | |
| return events; | |
| } | |
| @Override | |
| protected List<? extends TrackedEventData<?>> fetchTrackedEvents(TrackingToken lastToken, int batchSize) { | |
| Assert.isTrue(lastToken == null || lastToken instanceof GapAwareTrackingToken, () -> String.format("Token [%s] is of the wrong type. Expected [%s]", lastToken, GapAwareTrackingToken.class.getSimpleName())); | |
| GapAwareTrackingToken previousToken = cleanedToken((GapAwareTrackingToken) lastToken); | |
| List<Object[]> entries = transactionManager.fetchInTransaction(() -> (getEvents(previousToken, batchSize))); | |
| ...// The remaining part is related conversion from Object to TrackedEventData | |
| } |
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