Example usage for com.google.common.collect Lists partition

Introduction

In this page you can find the example usage for com.google.common.collect Lists partition.

Prototype

public static <T> List<List<T>> partition(List<T> list, int size) 

Source Link

Document

Returns consecutive List#subList(int,int) sublists of a list, each of the same size (the final list may be smaller).

Usage

From source file:org.fenixedu.cms.domain.component.PostsPresentationBean.java

public HashMap<String, Object> paginate(Page page, int currentPage, int postsPerPage) {

    List<List<Wrap>> pages = Lists.partition(getVisiblePosts(), postsPerPage);
    currentPage = ensureRange(currentPage, FIRST_PAGE_INDEX, pages.size());
    List<Wrap> currentPagePosts = pages.isEmpty() ? Lists.newArrayList()
            : pages.get(currentPage - FIRST_PAGE_INDEX);

    HashMap<String, Object> pagination = Maps.newHashMap();
    pagination.put("pages", createPagesList(pages.size()));
    pagination.put("current", currentPage);
    pagination.put("posts", currentPagePosts);
    return pagination;
}

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From source file:org.kuali.rice.kim.impl.identity.IdentityServiceDaoJpa.java

@Override
public Map<String, EntityNamePrincipalName> getDefaultNamesByPrincipalIds(List<String> principalIds) {
    Map<String, EntityNamePrincipalName> results = new HashMap<String, EntityNamePrincipalName>();

    // This partitioning is required because EclipseLink does not handle splitting up IN clauses with a large number of values into chunks
    List<List<String>> partitionedPrincipalIds = Lists.partition(principalIds, PARTITION_SIZE);
    for (List<String> partition : partitionedPrincipalIds) {
        List<NameHolder> names = getEntityManager()
                .createNamedQuery("EntityNameBo.findDefaultNamesForPrincipalIds", NameHolder.class)
                .setParameter("principalIds", partition).getResultList();
        for (NameHolder name : names) {
            EntityNamePrincipalName.Builder nameBuilder = EntityNamePrincipalName.Builder.create();
            EntityNameBo entityName = name.getEntityName();
            entityName.setSuppressName(name.isSuppressName());
            nameBuilder.setDefaultName(EntityName.Builder.create(entityName));
            nameBuilder.setPrincipalName(name.getPrincipalName());
            results.put(name.getPrincipalId(), nameBuilder.build());
        }/*ww w  . j a  v a 2 s  .  c o m*/
    }
    return results;
}

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From source file:org.apache.geode.geospatial.function.ClearRegion.java

@Override
public void execute(FunctionContext context) {

    String regionName = ((String[]) context.getArguments())[0];
    Region region = CacheFactory.getAnyInstance().getRegion(regionName);

    if (PartitionRegionHelper.isPartitionedRegion(region)) {
        region = PartitionRegionHelper.getLocalPrimaryData(region);
    }//  w ww.j a va2 s  . co  m
    int size = region.size();
    final Region lambdaRegion = region;
    Collection<Collection> partitionedKeys = Lists.partition(new ArrayList(region.keySet()), 1000);
    partitionedKeys.forEach(keySet -> lambdaRegion.removeAll(keySet));
    context.getResultSender().lastResult("Removed " + size + " keys.");
}

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From source file:com.watchrabbit.crawler.batch.service.TaskScheduler.java

@Scheduled(fixedDelayString = "${crawler.batch.delay:10000}")
public void execute() {
    try {/*ww  w  .j a v a2s  . c  o m*/
        LOGGER.info("Starting address job");

        List<String> queue = dispatcherServiceFacade.getQueue(maxQueueProcessingSize);
        if (queue.size() > 0) {
            List<List<String>> partition = Lists.partition(queue,
                    queue.size() / dispatcherServiceFacade.getInstanceCount());
            partition.forEach(dispatcherServiceFacade::dispatch);
        }
    } catch (RuntimeException e) {
        LOGGER.error("Address job exception", e);
    }
}

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From source file:io.github.mywarp.mywarp.platform.paginatedcontent.SimplePaginatedContent.java

private SimplePaginatedContent(String heading, String note, int numPerPage, List<Message> toDisplay) {
    this.heading = heading;
    this.note = note;
    this.pages = Lists.partition(toDisplay, showPerPage(numPerPage));
}

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From source file:matching.edmonds2.Matching.java

@Override
public <T> matching.Matches<T> from(final UndirectedGraph<T> residualGraph) {

    final ShortestPathInterface<T> routingInterface = residualGraph.fetch(ShortestPathFeature.class).up();
    final double[][] weights = routingInterface.getShortestPathWeights();

    final WeightedMatchDouble weightedMatch = new WeightedMatchDouble(weights);
    final int[] mate = weightedMatch.weightedMatch(WeightedMatchDouble.MINIMIZE);
    final int[] matched = weightedMatch.getMatched(mate);

    double cost = 0.0;
    final List<List<Integer>> partition = Lists.partition(Ints.asList(matched), 2);
    final Map<T, T> matches = Maps.newHashMap();

    for (final List<Integer> position : partition) {
        final Integer i = position.get(0);
        final Integer j = position.get(1);
        matches.put(residualGraph.get(i), residualGraph.get(j));
        cost += weights[i][j];/*from   w w  w.  ja  va2  s.  c  o  m*/
    }

    return new matching.Matches<T>(matches, cost);
}

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From source file:com.amazonservices.mws.products.samples.GetMyPriceForSKUSample.java

/**
 *  Command line entry point.//from   w ww .ja  v  a  2 s.  c  o  m
 * @throws IOException 
 * @throws InterruptedException 
 */
public static void main(String[] args) throws IOException, InterruptedException {

    //retrieve SKU from DB

    //open db connection to retireve skus.

    String url = "0";
    String username = "0";
    String password = "0";

    System.out.println("Loading driver...");
    try {
        Class.forName("com.mysql.jdbc.Driver");
        System.out.println("Driver loaded!");
    } catch (ClassNotFoundException e) {
        throw new IllegalStateException("Cannot find the driver in the classpath!", e);
    }

    System.out.println("Connecting database...");

    try (Connection connection = DriverManager.getConnection(url, username, password)) {

        System.out.println("Database connected!");

        //if successfully connected, will begin to retrieve sku #

        String query = "select SKU from AmazonListing";

        Statement st = connection.createStatement();

        //Intialize Arraylist to store sku;
        ArrayList<String> str = new ArrayList<String>();

        // execute the preparedstatement, and get result
        ResultSet rs = st.executeQuery(query);

        //use object attribute to store result, then store object attributes to a list

        AmazonListing al = new AmazonListing(query, query, query, query, query, query, query, query, query,
                query, query, query, query, query, query, query, query, query, query, query, query, query);

        //while there is sku in result, stored it in object, then add object to arraylist

        while (rs.next()) {

            //set retrieved ordernumbers from resultset rs to al object
            al.setSku(rs.getString("SKU"));

            //write  al object to arraylist of string str
            str.add(al.getSku());

        }

        //test and try 

        for (int i = 0; i < str.size(); i++) {

            System.out.println(str.get(i));

        }

        //after retrieving the result, close the connection
        connection.close();

        // Get a client connection.
        // Make sure you've set the variables in MarketplaceWebServiceProductsSampleConfig.
        MarketplaceWebServiceProductsClient client = MarketplaceWebServiceProductsSampleConfig.getClient();

        // Create a request.
        GetMyPriceForSKURequest request = new GetMyPriceForSKURequest();
        String sellerId = "0";
        request.setSellerId(sellerId);
        String mwsAuthToken = "0";
        request.setMWSAuthToken(mwsAuthToken);
        String marketplaceId = "0";
        request.setMarketplaceId(marketplaceId);

        //initialize for request input
        SellerSKUListType listofskus = new SellerSKUListType();

        //only accept 20 sku  at a time, this code is to send 20 at a time.  Lists.partition is google lang
        for (List<String> skupartition : Lists.partition(str, 20)) {

            System.out.println(skupartition.size());

            //set a list of size 50 to request
            listofskus.setSellerSKU(skupartition);

            //set request
            request.setSellerSKUList(listofskus);

            // Make the call.
            GetMyPriceForSKUSample.invokeGetMyPriceForSKU(client, request);

            System.out.println("Im about to get another set");

            //time paused for each request, time out in mili seconds. 
            Thread.sleep(10000);

        }

    } catch (SQLException e) {
        throw new IllegalStateException("Cannot connect the database!", e);
    }

}

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From source file:com.pinterest.pinlater.backends.common.PinLaterBackendUtils.java

/**
 * Executes a batch of requests asynchronously in a partitioned manner,
 * with the specified parallelism.//from   ww w . java2  s  .c o  m
 *
 * @param requests      List of requests to execute.
 * @param parallelism   Desired parallelism (must be > 0).
 * @param executeBatch  Function to execute each partitioned batch of requests.
 * @param <Req>         Request type.
 * @param <Resp>        Response type.
 * @return List of response futures.
 */
public static <Req, Resp> List<Future<Resp>> executePartitioned(List<Req> requests, int parallelism,
        Function<List<Req>, Future<Resp>> executeBatch) {
    MorePreconditions.checkNotBlank(requests);
    Preconditions.checkArgument(parallelism > 0);
    Preconditions.checkNotNull(executeBatch);

    int sizePerPartition = Math.max(requests.size() / parallelism, 1);
    List<List<Req>> partitions = Lists.partition(requests, sizePerPartition);
    List<Future<Resp>> futures = Lists.newArrayListWithCapacity(partitions.size());
    for (final List<Req> request : partitions) {
        futures.add(executeBatch.apply(request));
    }
    return futures;
}

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From source file:com.dianping.apistatic.Job.MovieShowBlockListCrawlerJob.java

@Override
protected void execute() throws Exception {
    movieShowIds.clear();//from  ww w . ja  v a  2 s.  co m
    shopIdMap = readMapFromFile(Constants.SHOPIDMAP_PATH); // key cityid
    movieIdMap = readMapFromFile(Constants.MOVIEIDMAP_PATH); // key cityid

    if (MapUtils.isEmpty(shopIdMap) || MapUtils.isEmpty(movieIdMap)) {
        log("shopIdMapmovieIdMap", new RuntimeException("shopIdMapmovieIdMap"));
        return;
    }

    List<Integer> cityIds = getCityIds();
    if (CollectionUtils.isEmpty(cityIds)) {
        return;
    }

    int partitionSize = (cityIds.size() > 4 ? cityIds.size() / 4 : cityIds.size());
    List<List<Integer>> cityIdsList = Lists.partition(cityIds, partitionSize);
    CountDownLatch countDownLatch = new CountDownLatch(cityIdsList.size());

    for (List<Integer> list : cityIdsList) {
        MovieShowBlockCrawlerThread thread = new MovieShowBlockCrawlerThread(list, countDownLatch);
        thread.start();
    }

    try {
        countDownLatch.await();
    } catch (Exception e) {
        log("countDownLatch ", e);
        return;
    }

    if (CollectionUtils.isNotEmpty(movieShowIds)) {
        writeObjectAsJsonToFile(Constants.MOVIESHOWIDS_PATH, movieShowIds);
    }
}

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From source file:tradetools.dataloader.service.impl.yahoofinance.YahooFinanceStockLoaderServiceImpl.java

@Override
public List<Stock> loadStocksBySymbolIn(List<String> symbols) {
    List<List<String>> pages = Lists.partition(symbols, 50);
    for (List<String> page : pages) {

    }/*from  w w w. ja v  a 2s.  c o m*/
    // TODO Auto-generated method stub
    return null;
}

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