Examples with Function com.google.common.base.Function used on opensource projects

Example 41 with Function

use of com.google.common.base.Function in project druid by druid-io.

the class GroupByQueryQueryToolChest method makePostComputeManipulatorFn.

@Override
public Function<Row, Row> makePostComputeManipulatorFn(final GroupByQuery query, final MetricManipulationFn fn) {
    final Set<String> optimizedDims = ImmutableSet.copyOf(Iterables.transform(extractionsToRewrite(query), new Function<DimensionSpec, String>() {

        @Override
        public String apply(DimensionSpec input) {
            return input.getOutputName();
        }
    }));
    final Function<Row, Row> preCompute = makePreComputeManipulatorFn(query, fn);
    if (optimizedDims.isEmpty()) {
        return preCompute;
    }
    // If we have optimizations that can be done at this level, we apply them here
    final Map<String, ExtractionFn> extractionFnMap = new HashMap<>();
    for (DimensionSpec dimensionSpec : query.getDimensions()) {
        final String dimension = dimensionSpec.getOutputName();
        if (optimizedDims.contains(dimension)) {
            extractionFnMap.put(dimension, dimensionSpec.getExtractionFn());
        }
    }
    return new Function<Row, Row>() {

        @Nullable
        @Override
        public Row apply(Row input) {
            Row preRow = preCompute.apply(input);
            if (preRow instanceof MapBasedRow) {
                MapBasedRow preMapRow = (MapBasedRow) preRow;
                Map<String, Object> event = Maps.newHashMap(preMapRow.getEvent());
                for (String dim : optimizedDims) {
                    final Object eventVal = event.get(dim);
                    event.put(dim, extractionFnMap.get(dim).apply(eventVal));
                }
                return new MapBasedRow(preMapRow.getTimestamp(), event);
            } else {
                return preRow;
            }
        }
    };
}

Example 42 with Function

use of com.google.common.base.Function in project druid by druid-io.

the class GroupByStrategyV2 method mergeResults.

@Override
public Sequence<Row> mergeResults(final QueryRunner<Row> baseRunner, final GroupByQuery query, final Map<String, Object> responseContext) {
    // Merge streams using ResultMergeQueryRunner, then apply postaggregators, then apply limit (which may
    // involve materialization)
    final ResultMergeQueryRunner<Row> mergingQueryRunner = new ResultMergeQueryRunner<Row>(baseRunner) {

        @Override
        protected Ordering<Row> makeOrdering(Query<Row> queryParam) {
            return ((GroupByQuery) queryParam).getRowOrdering(true);
        }

        @Override
        protected BinaryFn<Row, Row, Row> createMergeFn(Query<Row> queryParam) {
            return new GroupByBinaryFnV2((GroupByQuery) queryParam);
        }
    };
    // Fudge timestamp, maybe.
    final DateTime fudgeTimestamp = getUniversalTimestamp(query);
    return query.applyLimit(Sequences.map(mergingQueryRunner.run(new GroupByQuery(query.getDataSource(), query.getQuerySegmentSpec(), query.getVirtualColumns(), query.getDimFilter(), query.getGranularity(), query.getDimensions(), query.getAggregatorSpecs(), // Don't do post aggs until the end of this method.
    ImmutableList.<PostAggregator>of(), // Don't do "having" clause until the end of this method.
    null, null, query.getContext()).withOverriddenContext(ImmutableMap.<String, Object>of("finalize", false, GroupByQueryConfig.CTX_KEY_STRATEGY, GroupByStrategySelector.STRATEGY_V2, CTX_KEY_FUDGE_TIMESTAMP, fudgeTimestamp == null ? "" : String.valueOf(fudgeTimestamp.getMillis()), CTX_KEY_OUTERMOST, false)), responseContext), new Function<Row, Row>() {

        @Override
        public Row apply(final Row row) {
            if (!query.getContextBoolean(CTX_KEY_OUTERMOST, true)) {
                return row;
            }
            if (query.getPostAggregatorSpecs().isEmpty() && fudgeTimestamp == null) {
                return row;
            }
            final Map<String, Object> newMap;
            if (query.getPostAggregatorSpecs().isEmpty()) {
                newMap = ((MapBasedRow) row).getEvent();
            } else {
                newMap = Maps.newLinkedHashMap(((MapBasedRow) row).getEvent());
                for (PostAggregator postAggregator : query.getPostAggregatorSpecs()) {
                    newMap.put(postAggregator.getName(), postAggregator.compute(newMap));
                }
            }
            return new MapBasedRow(fudgeTimestamp != null ? fudgeTimestamp : row.getTimestamp(), newMap);
        }
    }));
}

Example 43 with Function

use of com.google.common.base.Function in project druid by druid-io.

the class IndexMerger method makeIndexFiles.

protected File makeIndexFiles(final List<IndexableAdapter> indexes, final AggregatorFactory[] metricAggs, final File outDir, final ProgressIndicator progress, final List<String> mergedDimensions, final List<String> mergedMetrics, final Function<ArrayList<Iterable<Rowboat>>, Iterable<Rowboat>> rowMergerFn, final IndexSpec indexSpec) throws IOException {
    List<Metadata> metadataList = Lists.transform(indexes, new Function<IndexableAdapter, Metadata>() {

        @Nullable
        @Override
        public Metadata apply(IndexableAdapter input) {
            return input.getMetadata();
        }
    });
    Metadata segmentMetadata = null;
    if (metricAggs != null) {
        AggregatorFactory[] combiningMetricAggs = new AggregatorFactory[metricAggs.length];
        for (int i = 0; i < metricAggs.length; i++) {
            combiningMetricAggs[i] = metricAggs[i].getCombiningFactory();
        }
        segmentMetadata = Metadata.merge(metadataList, combiningMetricAggs);
    } else {
        segmentMetadata = Metadata.merge(metadataList, null);
    }
    final Map<String, ValueType> valueTypes = Maps.newTreeMap(Ordering.<String>natural().nullsFirst());
    final Map<String, String> metricTypeNames = Maps.newTreeMap(Ordering.<String>natural().nullsFirst());
    final Map<String, ColumnCapabilitiesImpl> columnCapabilities = Maps.newHashMap();
    final List<ColumnCapabilitiesImpl> dimCapabilities = new ArrayList<>();
    for (IndexableAdapter adapter : indexes) {
        for (String dimension : adapter.getDimensionNames()) {
            ColumnCapabilitiesImpl mergedCapabilities = columnCapabilities.get(dimension);
            ColumnCapabilities capabilities = adapter.getCapabilities(dimension);
            if (mergedCapabilities == null) {
                mergedCapabilities = new ColumnCapabilitiesImpl();
            }
            columnCapabilities.put(dimension, mergedCapabilities.merge(capabilities));
        }
        for (String metric : adapter.getMetricNames()) {
            ColumnCapabilitiesImpl mergedCapabilities = columnCapabilities.get(metric);
            ColumnCapabilities capabilities = adapter.getCapabilities(metric);
            if (mergedCapabilities == null) {
                mergedCapabilities = new ColumnCapabilitiesImpl();
            }
            columnCapabilities.put(metric, mergedCapabilities.merge(capabilities));
            valueTypes.put(metric, capabilities.getType());
            metricTypeNames.put(metric, adapter.getMetricType(metric));
        }
    }
    for (String dimension : mergedDimensions) {
        dimCapabilities.add(columnCapabilities.get(dimension));
    }
    Closer closer = Closer.create();
    try {
        final Interval dataInterval;
        final File v8OutDir = new File(outDir, "v8-tmp");
        FileUtils.forceMkdir(v8OutDir);
        registerDeleteDirectory(closer, v8OutDir);
        File tmpPeonFilesDir = new File(v8OutDir, "tmpPeonFiles");
        FileUtils.forceMkdir(tmpPeonFilesDir);
        registerDeleteDirectory(closer, tmpPeonFilesDir);
        final IOPeon ioPeon = new TmpFileIOPeon(tmpPeonFilesDir, true);
        closer.register(ioPeon);
        /*************  Main index.drd file **************/
        progress.progress();
        long startTime = System.currentTimeMillis();
        File indexFile = new File(v8OutDir, "index.drd");
        try (FileOutputStream fileOutputStream = new FileOutputStream(indexFile);
            FileChannel channel = fileOutputStream.getChannel()) {
            channel.write(ByteBuffer.wrap(new byte[] { IndexIO.V8_VERSION }));
            GenericIndexed.fromIterable(mergedDimensions, GenericIndexed.STRING_STRATEGY).writeToChannel(channel);
            GenericIndexed.fromIterable(mergedMetrics, GenericIndexed.STRING_STRATEGY).writeToChannel(channel);
            DateTime minTime = new DateTime(JodaUtils.MAX_INSTANT);
            DateTime maxTime = new DateTime(JodaUtils.MIN_INSTANT);
            for (IndexableAdapter index : indexes) {
                minTime = JodaUtils.minDateTime(minTime, index.getDataInterval().getStart());
                maxTime = JodaUtils.maxDateTime(maxTime, index.getDataInterval().getEnd());
            }
            dataInterval = new Interval(minTime, maxTime);
            serializerUtils.writeString(channel, String.format("%s/%s", minTime, maxTime));
            serializerUtils.writeString(channel, mapper.writeValueAsString(indexSpec.getBitmapSerdeFactory()));
        }
        IndexIO.checkFileSize(indexFile);
        log.info("outDir[%s] completed index.drd in %,d millis.", v8OutDir, System.currentTimeMillis() - startTime);
        /************* Setup Dim Conversions **************/
        progress.progress();
        startTime = System.currentTimeMillis();
        final ArrayList<FileOutputSupplier> dimOuts = Lists.newArrayListWithCapacity(mergedDimensions.size());
        final DimensionHandler[] handlers = makeDimensionHandlers(mergedDimensions, dimCapabilities);
        final List<DimensionMerger> mergers = new ArrayList<>();
        for (int i = 0; i < mergedDimensions.size(); i++) {
            DimensionMergerLegacy merger = handlers[i].makeLegacyMerger(indexSpec, v8OutDir, ioPeon, dimCapabilities.get(i), progress);
            mergers.add(merger);
            merger.writeMergedValueMetadata(indexes);
            FileOutputSupplier dimOut = new FileOutputSupplier(merger.makeDimFile(), true);
            merger.writeValueMetadataToFile(dimOut);
            dimOuts.add(dimOut);
        }
        log.info("outDir[%s] completed dim conversions in %,d millis.", v8OutDir, System.currentTimeMillis() - startTime);
        /************* Walk through data sets and merge them *************/
        progress.progress();
        startTime = System.currentTimeMillis();
        Iterable<Rowboat> theRows = makeRowIterable(indexes, mergedDimensions, mergedMetrics, rowMergerFn, dimCapabilities, handlers, mergers);
        LongSupplierSerializer timeWriter = CompressionFactory.getLongSerializer(ioPeon, "little_end_time", IndexIO.BYTE_ORDER, indexSpec.getLongEncoding(), CompressedObjectStrategy.DEFAULT_COMPRESSION_STRATEGY);
        timeWriter.open();
        ArrayList<MetricColumnSerializer> metWriters = Lists.newArrayListWithCapacity(mergedMetrics.size());
        final CompressedObjectStrategy.CompressionStrategy metCompression = indexSpec.getMetricCompression();
        final CompressionFactory.LongEncodingStrategy longEncoding = indexSpec.getLongEncoding();
        for (String metric : mergedMetrics) {
            ValueType type = valueTypes.get(metric);
            switch(type) {
                case LONG:
                    metWriters.add(new LongMetricColumnSerializer(metric, v8OutDir, ioPeon, metCompression, longEncoding));
                    break;
                case FLOAT:
                    metWriters.add(new FloatMetricColumnSerializer(metric, v8OutDir, ioPeon, metCompression));
                    break;
                case COMPLEX:
                    final String typeName = metricTypeNames.get(metric);
                    ComplexMetricSerde serde = ComplexMetrics.getSerdeForType(typeName);
                    if (serde == null) {
                        throw new ISE("Unknown type[%s]", typeName);
                    }
                    metWriters.add(new ComplexMetricColumnSerializer(metric, v8OutDir, ioPeon, serde));
                    break;
                default:
                    throw new ISE("Unknown type[%s]", type);
            }
        }
        for (MetricColumnSerializer metWriter : metWriters) {
            metWriter.open();
        }
        int rowCount = 0;
        long time = System.currentTimeMillis();
        List<IntBuffer> rowNumConversions = Lists.newArrayListWithCapacity(indexes.size());
        for (IndexableAdapter index : indexes) {
            int[] arr = new int[index.getNumRows()];
            Arrays.fill(arr, INVALID_ROW);
            rowNumConversions.add(IntBuffer.wrap(arr));
        }
        for (Rowboat theRow : theRows) {
            progress.progress();
            timeWriter.add(theRow.getTimestamp());
            final Object[] metrics = theRow.getMetrics();
            for (int i = 0; i < metrics.length; ++i) {
                metWriters.get(i).serialize(metrics[i]);
            }
            Object[] dims = theRow.getDims();
            for (int i = 0; i < dims.length; ++i) {
                mergers.get(i).processMergedRow(dims[i]);
            }
            for (Map.Entry<Integer, TreeSet<Integer>> comprisedRow : theRow.getComprisedRows().entrySet()) {
                final IntBuffer conversionBuffer = rowNumConversions.get(comprisedRow.getKey());
                for (Integer rowNum : comprisedRow.getValue()) {
                    while (conversionBuffer.position() < rowNum) {
                        conversionBuffer.put(INVALID_ROW);
                    }
                    conversionBuffer.put(rowCount);
                }
            }
            if ((++rowCount % 500000) == 0) {
                log.info("outDir[%s] walked 500,000/%,d rows in %,d millis.", v8OutDir, rowCount, System.currentTimeMillis() - time);
                time = System.currentTimeMillis();
            }
        }
        for (IntBuffer rowNumConversion : rowNumConversions) {
            rowNumConversion.rewind();
        }
        final File timeFile = IndexIO.makeTimeFile(v8OutDir, IndexIO.BYTE_ORDER);
        timeFile.delete();
        ByteSink out = Files.asByteSink(timeFile, FileWriteMode.APPEND);
        timeWriter.closeAndConsolidate(out);
        IndexIO.checkFileSize(timeFile);
        for (MetricColumnSerializer metWriter : metWriters) {
            metWriter.close();
        }
        log.info("outDir[%s] completed walk through of %,d rows in %,d millis.", v8OutDir, rowCount, System.currentTimeMillis() - startTime);
        /************ Create Inverted Indexes and Finalize Columns *************/
        startTime = System.currentTimeMillis();
        final File invertedFile = new File(v8OutDir, "inverted.drd");
        Files.touch(invertedFile);
        out = Files.asByteSink(invertedFile, FileWriteMode.APPEND);
        final File geoFile = new File(v8OutDir, "spatial.drd");
        Files.touch(geoFile);
        OutputSupplier<FileOutputStream> spatialOut = Files.newOutputStreamSupplier(geoFile, true);
        for (int i = 0; i < mergedDimensions.size(); i++) {
            DimensionMergerLegacy legacyMerger = (DimensionMergerLegacy) mergers.get(i);
            legacyMerger.writeIndexes(rowNumConversions, closer);
            legacyMerger.writeIndexesToFiles(out, spatialOut);
            legacyMerger.writeRowValuesToFile(dimOuts.get(i));
        }
        log.info("outDir[%s] completed inverted.drd and wrote dimensions in %,d millis.", v8OutDir, System.currentTimeMillis() - startTime);
        final Function<String, String> dimFilenameFunction = new Function<String, String>() {

            @Override
            public String apply(@Nullable String input) {
                String formatString;
                if (columnCapabilities.get(input).isDictionaryEncoded()) {
                    formatString = "dim_%s.drd";
                } else {
                    formatString = String.format("numeric_dim_%%s_%s.drd", IndexIO.BYTE_ORDER);
                }
                return GuavaUtils.formatFunction(formatString).apply(input);
            }
        };
        final ArrayList<String> expectedFiles = Lists.newArrayList(Iterables.concat(Arrays.asList("index.drd", "inverted.drd", "spatial.drd", String.format("time_%s.drd", IndexIO.BYTE_ORDER)), Iterables.transform(mergedDimensions, dimFilenameFunction), Iterables.transform(mergedMetrics, GuavaUtils.formatFunction(String.format("met_%%s_%s.drd", IndexIO.BYTE_ORDER)))));
        if (segmentMetadata != null) {
            writeMetadataToFile(new File(v8OutDir, "metadata.drd"), segmentMetadata);
            log.info("wrote metadata.drd in outDir[%s].", v8OutDir);
            expectedFiles.add("metadata.drd");
        }
        Map<String, File> files = Maps.newLinkedHashMap();
        for (String fileName : expectedFiles) {
            files.put(fileName, new File(v8OutDir, fileName));
        }
        File smooshDir = new File(v8OutDir, "smoosher");
        FileUtils.forceMkdir(smooshDir);
        for (Map.Entry<String, File> entry : Smoosh.smoosh(v8OutDir, smooshDir, files).entrySet()) {
            entry.getValue().delete();
        }
        for (File file : smooshDir.listFiles()) {
            Files.move(file, new File(v8OutDir, file.getName()));
        }
        if (!smooshDir.delete()) {
            log.info("Unable to delete temporary dir[%s], contains[%s]", smooshDir, Arrays.asList(smooshDir.listFiles()));
            throw new IOException(String.format("Unable to delete temporary dir[%s]", smooshDir));
        }
        createIndexDrdFile(IndexIO.V8_VERSION, v8OutDir, GenericIndexed.fromIterable(mergedDimensions, GenericIndexed.STRING_STRATEGY), GenericIndexed.fromIterable(mergedMetrics, GenericIndexed.STRING_STRATEGY), dataInterval, indexSpec.getBitmapSerdeFactory());
        indexIO.getDefaultIndexIOHandler().convertV8toV9(v8OutDir, outDir, indexSpec);
        return outDir;
    } catch (Throwable t) {
        throw closer.rethrow(t);
    } finally {
        closer.close();
    }
}

Example 44 with Function

use of com.google.common.base.Function in project druid by druid-io.

the class TopNQueryEngine method query.

public Sequence<Result<TopNResultValue>> query(final TopNQuery query, final StorageAdapter adapter) {
    if (adapter == null) {
        throw new SegmentMissingException("Null storage adapter found. Probably trying to issue a query against a segment being memory unmapped.");
    }
    final List<Interval> queryIntervals = query.getQuerySegmentSpec().getIntervals();
    final Filter filter = Filters.convertToCNFFromQueryContext(query, Filters.toFilter(query.getDimensionsFilter()));
    final Granularity granularity = query.getGranularity();
    final Function<Cursor, Result<TopNResultValue>> mapFn = getMapFn(query, adapter);
    Preconditions.checkArgument(queryIntervals.size() == 1, "Can only handle a single interval, got[%s]", queryIntervals);
    return Sequences.filter(Sequences.map(adapter.makeCursors(filter, queryIntervals.get(0), query.getVirtualColumns(), granularity, query.isDescending()), new Function<Cursor, Result<TopNResultValue>>() {

        @Override
        public Result<TopNResultValue> apply(Cursor input) {
            log.debug("Running over cursor[%s]", adapter.getInterval(), input.getTime());
            return mapFn.apply(input);
        }
    }), Predicates.<Result<TopNResultValue>>notNull());
}

Example 45 with Function

use of com.google.common.base.Function in project druid by druid-io.

the class TopNQueryQueryToolChest method makePostComputeManipulatorFn.

@Override
public Function<Result<TopNResultValue>, Result<TopNResultValue>> makePostComputeManipulatorFn(final TopNQuery query, final MetricManipulationFn fn) {
    return new Function<Result<TopNResultValue>, Result<TopNResultValue>>() {

        private String dimension = query.getDimensionSpec().getOutputName();

        private final AggregatorFactory[] aggregatorFactories = query.getAggregatorSpecs().toArray(new AggregatorFactory[0]);

        private final String[] aggFactoryNames = extractFactoryName(query.getAggregatorSpecs());

        private final PostAggregator[] postAggregators = query.getPostAggregatorSpecs().toArray(new PostAggregator[0]);

        @Override
        public Result<TopNResultValue> apply(Result<TopNResultValue> result) {
            List<Map<String, Object>> serializedValues = Lists.newArrayList(Iterables.transform(result.getValue(), new Function<DimensionAndMetricValueExtractor, Map<String, Object>>() {

                @Override
                public Map<String, Object> apply(DimensionAndMetricValueExtractor input) {
                    final Map<String, Object> values = Maps.newHashMapWithExpectedSize(aggregatorFactories.length + query.getPostAggregatorSpecs().size() + 1);
                    for (int i = 0; i < aggFactoryNames.length; ++i) {
                        final String name = aggFactoryNames[i];
                        values.put(name, input.getMetric(name));
                    }
                    for (PostAggregator postAgg : postAggregators) {
                        Object calculatedPostAgg = input.getMetric(postAgg.getName());
                        if (calculatedPostAgg != null) {
                            values.put(postAgg.getName(), calculatedPostAgg);
                        } else {
                            values.put(postAgg.getName(), postAgg.compute(values));
                        }
                    }
                    for (int i = 0; i < aggFactoryNames.length; ++i) {
                        final String name = aggFactoryNames[i];
                        values.put(name, fn.manipulate(aggregatorFactories[i], input.getMetric(name)));
                    }
                    values.put(dimension, input.getDimensionValue(dimension));
                    return values;
                }
            }));
            return new Result<>(result.getTimestamp(), new TopNResultValue(serializedValues));
        }
    };
}