Example usage for java.util.stream StreamSupport stream

Introduction

In this page you can find the example usage for java.util.stream StreamSupport stream.

Prototype

public static <T> Stream<T> stream(Spliterator<T> spliterator, boolean parallel)

Source Link

Document

Creates a new sequential or parallel Stream from a Spliterator .

Usage

From source file:org.obiba.mica.dataset.service.HarmonizedDatasetService.java

public Iterable<DatasetVariable> getDatasetVariables(HarmonizationDataset dataset, OpalTable opalTable)
        throws NoSuchStudyException, NoSuchValueTableException {
    return StreamSupport.stream(getVariables(opalTable).spliterator(), false)
            .map(input -> new DatasetVariable(dataset, input, opalTable)).collect(toList());
}

From source file:org.mascherl.example.service.ComposeMailService.java

public CompletableFuture<List<MailAddressUsage>> getLastSendToAddressesAsync2(User currentUser, int limit) {
    CompletableFuture<List<MailAddressUsage>> completableFuture = new CompletableFuture<>();
    db.query(/*from   w  w  w .j av  a2s.  c om*/
            "select distinct mto.address, m.datetime " + "from mail m "
                    + "join mail_to mto on mto.mail_uuid = m.uuid " + "where m.user_uuid = $1 "
                    + "and m.mail_type = $2 " + "and not exists (" + "   select 1 from mail m2 "
                    + "   join mail_to mto2 on mto2.mail_uuid = m2.uuid " + "   where m2.user_uuid = $1 "
                    + "   and m2.mail_type = $2 " + "   and mto2.address = mto.address "
                    + "   and m2.datetime > m.datetime " + ") " + "order by m.datetime desc " + "limit $3",
            Arrays.asList(currentUser.getUuid(), MailType.SENT.name(), limit), result -> {
                try {
                    TimestampColumnZonedDateTimeMapper dateTimeColumnMapper = new PersistentZonedDateTime()
                            .getColumnMapper();
                    List<MailAddressUsage> usages = StreamSupport.stream(result.spliterator(), false)
                            .map(row -> new MailAddressUsage(new MailAddress(row.getString(0)),
                                    dateTimeColumnMapper.fromNonNullValue(row.getTimestamp(1))))
                            .collect(Collectors.toList());
                    completableFuture.complete(usages);
                } catch (Exception e) {
                    completableFuture.completeExceptionally(e);
                }
            }, completableFuture::completeExceptionally);

    return completableFuture;
}

From source file:org.hawkular.metrics.dropwizard.HawkularReporterTest.java

@Test
public void shouldReportDoubleGauge() {
    HawkularReporter reporter = HawkularReporter.builder(registry, "unit-test").useHttpClient(uri -> client)
            .build();// w  w w  .j  av a 2s  .c o m

    final Gauge<Double> gauge = () -> 1.5d;
    registry.register("gauge.double", gauge);
    reporter.report();

    assertThat(client.getMetricsRestCalls()).hasSize(1);
    JSONObject metrics = new JSONObject(client.getMetricsRestCalls().get(0));
    assertThat(metrics.keySet()).containsOnly("gauges");

    JSONArray gaugesJson = metrics.getJSONArray("gauges");
    Map<String, Double> values = StreamSupport.stream(gaugesJson.spliterator(), false)
            .collect(toMap(idFromRoot::extract, dValueFromRoot::extract));
    assertThat(values).containsOnly(entry("gauge.double", 1.5d));
}

From source file:com.github.larsq.spring.embeddedamqp.SimpleAmqpMessageContainer.java

/**
 * Find set of abstract exchange routers by traversing a comprising class.
 * This method is invoked to discover available router types.
 *
 * @return/*from  ww  w.ja  va2  s  .c om*/
 */
Set<AbstractExchangeRouter> findRouters() {
    ClassStructureWalker walker = new ClassStructureWalker(Routers.class, false, true);
    Iterable<Class<?>> innerClasses = walker
            .traverseClassStructure(clz -> Sets.newHashSet(clz.getDeclaredClasses()));

    return StreamSupport.stream(innerClasses.spliterator(), false)
            .filter(AbstractExchangeRouter.class::isAssignableFrom)
            .filter(clz -> !Modifier.isAbstract(clz.getModifiers()))
            .map(clz -> (AbstractExchangeRouter) invokeInnerClassConstructor(clz)).collect(Collectors.toSet());
}

From source file:com.epam.dlab.backendapi.dao.BaseDAO.java

protected Stream<Document> stream(Iterable<Document> iterable) {
    return StreamSupport.stream(iterable.spliterator(), false);
}

From source file:com.intuit.wasabi.repository.cassandra.impl.CassandraPagesRepository.java

@Override
public Map<Pair<Application.Name, Page.Name>, List<PageExperiment>> getExperimentsWithoutLabels(
        Collection<Pair<Application.Name, Page.Name>> appAndPagePairs) {
    logger.debug("getExperimentsWithoutLabels {}", appAndPagePairs);
    Map<Pair<Application.Name, Page.Name>, List<PageExperiment>> resultMap = new HashMap<>();
    try {/*from w ww  .  jav a  2 s. c o m*/
        Map<Pair<Application.Name, Page.Name>, ListenableFuture<Result<PageExperimentByAppNamePage>>> expFutureMap = new HashMap<>();
        appAndPagePairs.forEach(pair -> {
            expFutureMap.put(pair, pageExperimentIndexAccessor.asyncSelectBy(pair.getLeft().toString(),
                    pair.getRight().toString()));
        });

        for (Pair<Application.Name, Page.Name> pair : expFutureMap.keySet()) {
            ListenableFuture<Result<PageExperimentByAppNamePage>> expFuture = expFutureMap.get(pair);
            Stream<PageExperimentByAppNamePage> resultList = StreamSupport.stream(
                    Spliterators.spliteratorUnknownSize(
                            UninterruptibleUtil.getUninterruptibly(expFuture).iterator(), Spliterator.ORDERED),
                    false);
            List<PageExperiment> pageExperimentsList = resultList.map(t -> {
                PageExperiment.Builder builder = new PageExperiment.Builder(
                        Experiment.ID.valueOf(t.getExperimentId()), null, t.isAssign());
                return builder.build();
            }).collect(Collectors.toList());

            resultMap.put(pair, pageExperimentsList);
        }
    } catch (Exception e) {
        logger.error("getExperimentsWithoutLabels for {} failed", appAndPagePairs, e);
        throw new RepositoryException("Could not getExperimentsWithoutLabels", e);
    }

    logger.debug("Returning PageExperimentList map {}", resultMap);
    return resultMap;
}

From source file:com.ikanow.aleph2.harvest.logstash.utils.LogstashUtils.java

/**
 * Reads the given output file and outputs it to the logger with the spec'd log level.
 * @param logger/*  w  w  w . j av  a 2 s.  c o m*/
 * @param level
 * @param output_file
 * @throws IOException 
 */
public static void sendOutputToLogger(final IBucketLogger logger, final Level level, final File output_file,
        final Optional<Long> max_lines) throws IOException {
    //      _logger.error("Reading output file: " + output_file + " to send to logger at level: " + level);
    Files.lines(output_file.toPath()).limit(max_lines.orElse(10000L)).forEach(line -> {
        try {
            //convert line to valid json, then parse json, build BMB object from it
            final String fixed_line = line.replaceAll(logstash_colon_search, logstash_colon_replace)
                    .replaceAll(logstash_arrow_search, logstash_arrow_replace)
                    .replaceAll(logstash_newline_search, logstash_newline_replace);
            final String plugin_fixed = fixPlugin(fixed_line);
            final ObjectNode line_object = (ObjectNode) _mapper.readTree(plugin_fixed);
            //move specific fields we want into BMB
            final Date date = parseLogstashDate(line_object.remove("timestamp").asText());
            final Level logstash_level = Level.valueOf(line_object.remove("level").asText());
            final String message = line_object.remove("message").asText();
            //move everything else into details map
            logger.inefficientLog(logstash_level,
                    new BasicMessageBean(date, true, LogstashHarvestService.class.getSimpleName(),
                            "test_output", null, message,
                            StreamSupport
                                    .stream(Spliterators.spliteratorUnknownSize(line_object.fields(),
                                            Spliterator.ORDERED), true)
                                    .collect(Collectors.toMap(e -> e.getKey(), e -> e.getValue().asText()))));
        } catch (Exception ex) {
            //fallback on conversion failure
            logger.inefficientLog(level, ErrorUtils
                    .buildSuccessMessage(LogstashHarvestService.class.getSimpleName(), "test_output", line));
        }
    });
    //TODO should we delete log file after we've read it?
}

From source file:com.ikanow.aleph2.search_service.elasticsearch.utils.ElasticsearchIndexUtils.java

/**  Recursive function that will return all fields in an insert (eg "geoip", "geoip.location")
 * @param index//  w w w .  java 2s  . c o m
 * @return
 */
protected static Stream<String> getAllFixedFields_internal(final JsonNode index) {
    return Optional.ofNullable(index.get("properties")).filter(p -> !p.isNull()).map(p -> {
        if (!p.isObject())
            throw new RuntimeException("properties must be object");
        return p;
    }).map(p -> {
        return StreamSupport.stream(Spliterators.spliteratorUnknownSize(p.fields(), Spliterator.ORDERED), false)
                .map(kv -> {
                    return kv;
                }).<String>flatMap(kv -> {
                    final Stream<String> parent_element = Stream.of(kv.getKey());
                    return Stream.concat(parent_element,
                            getAllFixedFields_internal(kv.getValue()).map(s -> kv.getKey() + "." + s));
                });
    }).orElse(Stream.<String>empty());
}

From source file:org.hawkular.metrics.dropwizard.HawkularReporterTest.java

@Test
public void shouldReportBigDecimalGauge() {
    HawkularReporter reporter = HawkularReporter.builder(registry, "unit-test").useHttpClient(uri -> client)
            .build();//from w w w .j a v a  2s . c o  m

    final Gauge<BigDecimal> gauge = () -> new BigDecimal("1.5");
    registry.register("gauge.bigd", gauge);
    reporter.report();

    assertThat(client.getMetricsRestCalls()).hasSize(1);
    JSONObject metrics = new JSONObject(client.getMetricsRestCalls().get(0));
    assertThat(metrics.keySet()).containsOnly("gauges");

    JSONArray gaugesJson = metrics.getJSONArray("gauges");
    Map<String, Double> values = StreamSupport.stream(gaugesJson.spliterator(), false)
            .collect(toMap(idFromRoot::extract, dValueFromRoot::extract));
    assertThat(values).containsOnly(entry("gauge.bigd", 1.5d));
}

From source file:org.hawkular.inventory.impl.tinkerpop.test.BasicTest.java

@Test
public void testTenants() throws Exception {
    Function<String, Void> test = (id) -> {
        GraphQuery q = graph.query().has("__type", "tenant").has("__eid", id);

        Iterator<Vertex> evs = q.vertices().iterator();
        assert evs.hasNext();
        Vertex ev = evs.next();/*from   w w w .  j  a va2 s  .  co  m*/
        assert !evs.hasNext();

        Tenant t = inventory.tenants().get(id).entity();

        assert ev.getProperty("__eid").equals(id);
        assert t.getId().equals(id);
        return null;
    };

    test.apply("com.acme.tenant");
    test.apply("com.example.tenant");

    GraphQuery query = graph.query().has("__type", "tenant");
    assert StreamSupport.stream(query.vertices().spliterator(), false).count() == 2;
}