Examples with StreamRecord software.amazon.qldb.tutorial.model.streams.StreamRecord used on opensource projects

Example 1 with StreamRecord

use of software.amazon.qldb.tutorial.model.streams.StreamRecord in project amazon-qldb-dmv-sample-java by aws-samples.

the class StreamJournal method streamRecordsToJournalBlocks.

private static List<JournalBlock> streamRecordsToJournalBlocks() {
    Map<ByteBuffer, QldbRevision> revisionsByHash = new HashMap<>();
    recordBuffer.stream().filter(record -> record.getRecordType().equals("REVISION_DETAILS")).forEach(record -> {
        try {
            Revision revision = ((RevisionDetailsRecord) record.getPayload()).getRevision();
            byte[] revisionHash = revision.getHash();
            revisionsByHash.put(wrap(revisionHash).asReadOnlyBuffer(), QldbRevision.fromIon((IonStruct) Constants.MAPPER.writeValueAsIonValue(revision)));
        } catch (IOException e) {
            throw new IllegalArgumentException("Could not map RevisionDetailsRecord to QldbRevision.", e);
        }
    });
    return recordBuffer.stream().filter(streamRecord -> streamRecord.getRecordType().equals("BLOCK_SUMMARY")).map(streamRecord -> (BlockSummaryRecord) streamRecord.getPayload()).distinct().map(blockSummaryRecord -> blockSummaryRecordToJournalBlock(blockSummaryRecord, revisionsByHash)).sorted(Comparator.comparingLong(o -> o.getBlockAddress().getSequenceNo())).collect(Collectors.toList());
}