Examples with Metadata org.apache.druid.segment.Metadata used on opensource projects

Example 1 with Metadata

use of org.apache.druid.segment.Metadata in project presto by prestodb.

the class V9SegmentIndexSource method loadIndex.

@Override
public QueryableIndex loadIndex(List<ColumnHandle> columnHandles) throws IOException {
    ByteBuffer indexBuffer = ByteBuffer.wrap(segmentColumnSource.getColumnData(INDEX_METADATA_FILE_NAME));
    GenericIndexed.read(indexBuffer, STRING_STRATEGY);
    GenericIndexed<String> allDimensions = GenericIndexed.read(indexBuffer, STRING_STRATEGY);
    Interval dataInterval = Intervals.utc(indexBuffer.getLong(), indexBuffer.getLong());
    BitmapSerdeFactory segmentBitmapSerdeFactory;
    if (indexBuffer.hasRemaining()) {
        segmentBitmapSerdeFactory = JSON_MAPPER.readValue(SERIALIZER_UTILS.readString(indexBuffer), BitmapSerdeFactory.class);
    } else {
        segmentBitmapSerdeFactory = new BitmapSerde.LegacyBitmapSerdeFactory();
    }
    Metadata metadata = null;
    ByteBuffer metadataBuffer = ByteBuffer.wrap(segmentColumnSource.getColumnData(SEGMENT_METADATA_FILE_NAME));
    try {
        metadata = JSON_MAPPER.readValue(SERIALIZER_UTILS.readBytes(metadataBuffer, metadataBuffer.remaining()), Metadata.class);
    } catch (JsonParseException | JsonMappingException e) {
        // Any jackson deserialization errors are ignored e.g. if metadata contains some aggregator which
        // is no longer supported then it is OK to not use the metadata instead of failing segment loading
        log.warn(e, "Failed to load metadata for segment");
    }
    Map<String, Supplier<ColumnHolder>> columns = new HashMap<>();
    for (ColumnHandle columnHandle : columnHandles) {
        String columnName = ((DruidColumnHandle) columnHandle).getColumnName();
        columns.put(columnName, () -> createColumnHolder(columnName));
    }
    List<String> availableDimensions = Streams.stream(allDimensions.iterator()).filter(columns::containsKey).collect(toImmutableList());
    columns.put(TIME_COLUMN_NAME, () -> createColumnHolder(TIME_COLUMN_NAME));
    Indexed<String> indexed = new ListIndexed<>(availableDimensions);
    // TODO: get rid of the time column by creating Presto's SimpleQueryableIndex impl
    return new SimpleQueryableIndex(dataInterval, indexed, segmentBitmapSerdeFactory.getBitmapFactory(), columns, null, metadata, false);
}

Example 2 with Metadata

use of org.apache.druid.segment.Metadata in project druid by druid-io.

the class SegmentMetadataQueryRunnerFactory method createRunner.

@Override
public QueryRunner<SegmentAnalysis> createRunner(final Segment segment) {
    return new QueryRunner<SegmentAnalysis>() {

        @Override
        public Sequence<SegmentAnalysis> run(QueryPlus<SegmentAnalysis> inQ, ResponseContext responseContext) {
            SegmentMetadataQuery updatedQuery = ((SegmentMetadataQuery) inQ.getQuery()).withFinalizedAnalysisTypes(toolChest.getConfig());
            final SegmentAnalyzer analyzer = new SegmentAnalyzer(updatedQuery.getAnalysisTypes());
            final Map<String, ColumnAnalysis> analyzedColumns = analyzer.analyze(segment);
            final long numRows = analyzer.numRows(segment);
            long totalSize = 0;
            if (analyzer.analyzingSize()) {
                // Initialize with the size of the whitespace, 1 byte per
                totalSize = analyzedColumns.size() * numRows;
            }
            Map<String, ColumnAnalysis> columns = new TreeMap<>();
            ColumnIncluderator includerator = updatedQuery.getToInclude();
            for (Map.Entry<String, ColumnAnalysis> entry : analyzedColumns.entrySet()) {
                final String columnName = entry.getKey();
                final ColumnAnalysis column = entry.getValue();
                if (!column.isError()) {
                    totalSize += column.getSize();
                }
                if (includerator.include(columnName)) {
                    columns.put(columnName, column);
                }
            }
            List<Interval> retIntervals = updatedQuery.analyzingInterval() ? Collections.singletonList(segment.getDataInterval()) : null;
            final Map<String, AggregatorFactory> aggregators;
            Metadata metadata = null;
            if (updatedQuery.hasAggregators()) {
                metadata = segment.asStorageAdapter().getMetadata();
                if (metadata != null && metadata.getAggregators() != null) {
                    aggregators = new HashMap<>();
                    for (AggregatorFactory aggregator : metadata.getAggregators()) {
                        aggregators.put(aggregator.getName(), aggregator);
                    }
                } else {
                    aggregators = null;
                }
            } else {
                aggregators = null;
            }
            final TimestampSpec timestampSpec;
            if (updatedQuery.hasTimestampSpec()) {
                if (metadata == null) {
                    metadata = segment.asStorageAdapter().getMetadata();
                }
                timestampSpec = metadata != null ? metadata.getTimestampSpec() : null;
            } else {
                timestampSpec = null;
            }
            final Granularity queryGranularity;
            if (updatedQuery.hasQueryGranularity()) {
                if (metadata == null) {
                    metadata = segment.asStorageAdapter().getMetadata();
                }
                queryGranularity = metadata != null ? metadata.getQueryGranularity() : null;
            } else {
                queryGranularity = null;
            }
            Boolean rollup = null;
            if (updatedQuery.hasRollup()) {
                if (metadata == null) {
                    metadata = segment.asStorageAdapter().getMetadata();
                }
                rollup = metadata != null ? metadata.isRollup() : null;
                if (rollup == null) {
                    // in this case, this segment is built before no-rollup function is coded,
                    // thus it is built with rollup
                    rollup = Boolean.TRUE;
                }
            }
            return Sequences.simple(Collections.singletonList(new SegmentAnalysis(segment.getId().toString(), retIntervals, columns, totalSize, numRows, aggregators, timestampSpec, queryGranularity, rollup)));
        }
    };
}

Example 3 with Metadata

use of org.apache.druid.segment.Metadata in project druid by druid-io.

the class RealtimePlumber method bootstrapSinksFromDisk.

protected Object bootstrapSinksFromDisk() {
    final VersioningPolicy versioningPolicy = config.getVersioningPolicy();
    File baseDir = computeBaseDir(schema);
    if (baseDir == null || !baseDir.exists()) {
        return null;
    }
    File[] files = baseDir.listFiles();
    if (files == null) {
        return null;
    }
    Object metadata = null;
    long latestCommitTime = 0;
    for (File sinkDir : files) {
        final Interval sinkInterval = Intervals.of(sinkDir.getName().replace('_', '/'));
        // final File[] sinkFiles = sinkDir.listFiles();
        // To avoid reading and listing of "merged" dir
        final File[] sinkFiles = sinkDir.listFiles(new FilenameFilter() {

            @Override
            public boolean accept(File dir, String fileName) {
                return !(Ints.tryParse(fileName) == null);
            }
        });
        Arrays.sort(sinkFiles, new Comparator<File>() {

            @Override
            public int compare(File o1, File o2) {
                try {
                    return Ints.compare(Integer.parseInt(o1.getName()), Integer.parseInt(o2.getName()));
                } catch (NumberFormatException e) {
                    log.error(e, "Couldn't compare as numbers? [%s][%s]", o1, o2);
                    return o1.compareTo(o2);
                }
            }
        });
        boolean isCorrupted = false;
        List<FireHydrant> hydrants = new ArrayList<>();
        for (File segmentDir : sinkFiles) {
            log.info("Loading previously persisted segment at [%s]", segmentDir);
            // If 100% sure that this is not needed, this check can be removed.
            if (Ints.tryParse(segmentDir.getName()) == null) {
                continue;
            }
            QueryableIndex queryableIndex = null;
            try {
                queryableIndex = indexIO.loadIndex(segmentDir);
            } catch (IOException e) {
                log.error(e, "Problem loading segmentDir from disk.");
                isCorrupted = true;
            }
            if (isCorrupted) {
                try {
                    File corruptSegmentDir = computeCorruptedFileDumpDir(segmentDir, schema);
                    log.info("Renaming %s to %s", segmentDir.getAbsolutePath(), corruptSegmentDir.getAbsolutePath());
                    org.apache.commons.io.FileUtils.copyDirectory(segmentDir, corruptSegmentDir);
                    FileUtils.deleteDirectory(segmentDir);
                } catch (Exception e1) {
                    log.error(e1, "Failed to rename %s", segmentDir.getAbsolutePath());
                }
                // at some point.
                continue;
            }
            Metadata segmentMetadata = queryableIndex.getMetadata();
            if (segmentMetadata != null) {
                Object timestampObj = segmentMetadata.get(COMMIT_METADATA_TIMESTAMP_KEY);
                if (timestampObj != null) {
                    long timestamp = ((Long) timestampObj).longValue();
                    if (timestamp > latestCommitTime) {
                        log.info("Found metaData [%s] with latestCommitTime [%s] greater than previous recorded [%s]", queryableIndex.getMetadata(), timestamp, latestCommitTime);
                        latestCommitTime = timestamp;
                        metadata = queryableIndex.getMetadata().get(COMMIT_METADATA_KEY);
                    }
                }
            }
            hydrants.add(new FireHydrant(new QueryableIndexSegment(queryableIndex, SegmentId.of(schema.getDataSource(), sinkInterval, versioningPolicy.getVersion(sinkInterval), config.getShardSpec())), Integer.parseInt(segmentDir.getName())));
        }
        if (hydrants.isEmpty()) {
            // Probably encountered a corrupt sink directory
            log.warn("Found persisted segment directory with no intermediate segments present at %s, skipping sink creation.", sinkDir.getAbsolutePath());
            continue;
        }
        final Sink currSink = new Sink(sinkInterval, schema, config.getShardSpec(), versioningPolicy.getVersion(sinkInterval), config.getAppendableIndexSpec(), config.getMaxRowsInMemory(), config.getMaxBytesInMemoryOrDefault(), true, config.getDedupColumn(), hydrants);
        addSink(currSink);
    }
    return metadata;
}