Example usage for java.util.concurrent ForkJoinPool ForkJoinPool

List of usage examples for java.util.concurrent ForkJoinPool ForkJoinPool

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Introduction

In this page you can find the example usage for java.util.concurrent ForkJoinPool ForkJoinPool.

Prototype

public ForkJoinPool()

Source Link

Document

Creates a ForkJoinPool with parallelism equal to java.lang.Runtime#availableProcessors , using defaults for all other parameters (see #ForkJoinPool(int,ForkJoinWorkerThreadFactory,UncaughtExceptionHandler,boolean,int,int,int,Predicate,long,TimeUnit) ).

Usage

From source file:Main.java

public static void main(String[] args) {
    ForkJoinPool pool = new ForkJoinPool();
    IntSum task = new IntSum(3);
    long sum = pool.invoke(task);
    System.out.println("Sum is " + sum);
}

From source file:Main.java

public static void main(String[] args) {
    ForkJoinPool fjPool = new ForkJoinPool();
    int[] a = new int[3333344];
    for (int i = 0; i < a.length; i++) {
        int k = (int) (Math.random() * 22222);
        a[i] = k;//  w w w.  j a va 2 s  . c o  m
    }
    ForkJoinQuicksortTask forkJoinQuicksortTask = new ForkJoinQuicksortTask(a, 0, a.length - 1);
    long start = System.nanoTime();
    fjPool.invoke(forkJoinQuicksortTask);
    System.out.println("Time: " + (System.nanoTime() - start));
}

From source file:Test.java

public static void main(String[] args) {
    int numbers[] = new int[100000];
    ForkJoinPool forkJoinPool = new ForkJoinPool();
    long result = forkJoinPool.invoke(new SumOfSquaresTask(0, numbers.length));
    System.out.println("forkJoinPool: " + forkJoinPool.toString());
    System.out.println("forkJoinPool: " + forkJoinPool.toString());
    System.out.println("Sum of squares: " + result);
}

From source file:Main.java

public static void main(String[] args) throws InterruptedException {
    executors = new ForkJoinPool();
    List<Long> sequence = new ArrayList<>();
    for (int i = 0; i < 20; i++) {
        sequence.add(fib(i));//from   w  ww .  ja  v a2 s.  c o m
    }
    System.out.println(sequence);
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    int size = 100000;
    int[] v1 = new int[size];
    for (int i = 0; i < size; i++) {
        v1[i] = i;/*from  w w  w.  j ava  2 s  . co m*/
    }
    for (SEQ_THRESHOLD = 10; SEQ_THRESHOLD < size; SEQ_THRESHOLD += 50) {
        double avgTime = 0.0;
        int samples = 5;
        for (int i = 0; i < samples; i++) {
            long startTime = System.nanoTime();
            ForkJoinPool fjp = new ForkJoinPool();
            fjp.invoke(new MyAction(0, size, v1));
            long endTime = System.nanoTime();
            double secsTaken = (endTime - startTime) / 1.0e9;
            avgTime += secsTaken;
        }
        System.out.println(SEQ_THRESHOLD + " " + (avgTime / samples));
    }
}

From source file:de.science.hack.meshbuilding.MeshBuilder.java

public MeshBuilder() {
    pool = new ForkJoinPool();
}

From source file:com.kegare.caveworld.util.Version.java

public static void versionCheck() {
    if (!CURRENT.isPresent() || !LATEST.isPresent()) {
        initialize();// ww w.j a  v a 2  s.  c o m
    }

    new ForkJoinPool().execute(new Version());
}

From source file:org.rhwlab.BHCnotused.ThreadedAlgorithm.java

public void init(int seg) throws Exception {
    clusters = new ArrayList<>();
    // build the initial clusters with one data point in each cluster
    for (int n = 0; n < source.getK(); ++n) {
        RealVector v = source.getCenter(n);
        Dfp[] z = new Dfp[v.getDimension()];
        for (int i = 0; i < z.length; ++i) {
            z[i] = field.newDfp(v.getEntry(i));
        }/*from   w ww. j a va 2  s  . c  o m*/
        LabeledFieldVector fv = new LabeledFieldVector(z, n);
        Cluster cluster = new Cluster(new GaussianGIWPrior(fv));
        clusters.add(cluster);
    }

    // make all possible pairings of initial clusters
    pairs = new HashMap<>();
    for (int i = 0; i < clusters.size() - 1; ++i) {
        HashMap<Cluster, Cluster> map = new HashMap<>();
        MergeAction merge = new MergeAction(clusters, i, i + 1, map);
        ForkJoinPool pool = new ForkJoinPool();
        pool.invoke(merge);
        Cluster clusterI = clusters.get(i);
        pairs.put(clusterI, map);
        System.out.printf("Cluster %d paired\n", i);
    }
}

From source file:com.kegare.caveworld.world.WorldProviderDeepCaveworld.java

public static void regenerate(final boolean backup) {
    final File dir = getDimDir();
    final String name = dir.getName().substring(4);
    final MinecraftServer server = FMLCommonHandler.instance().getMinecraftServerInstance();
    Set<EntityPlayerMP> target = Sets.newHashSet();

    for (Object obj : server.getConfigurationManager().playerEntityList.toArray()) {
        if (obj != null && ((EntityPlayerMP) obj).dimension == CaveworldAPI.getDeepDimension()) {
            target.add(CaveUtils.respawnPlayer((EntityPlayerMP) obj, 0));
        }//from  w ww. ja  v a  2  s . c om
    }

    boolean result = new ForkJoinPool().invoke(new RecursiveTask<Boolean>() {
        @Override
        protected Boolean compute() {
            IChatComponent component;

            try {
                component = new ChatComponentText(
                        StatCollector.translateToLocalFormatted("caveworld.regenerate.regenerating", name));
                component.getChatStyle().setColor(EnumChatFormatting.GRAY).setItalic(true);
                server.getConfigurationManager().sendChatMsg(component);

                if (server.isSinglePlayer()) {
                    Caveworld.network.sendToAll(new RegenerateMessage(backup));
                }

                Caveworld.network.sendToAll(new RegenerateMessage.ProgressNotify(0));

                CaveBlocks.caveworld_portal.portalDisabled = true;

                int dim = CaveworldAPI.getDeepDimension();
                WorldServer world = DimensionManager.getWorld(dim);

                if (world != null) {
                    world.saveAllChunks(true, null);
                    world.flush();

                    MinecraftForge.EVENT_BUS.post(new WorldEvent.Unload(world));

                    DimensionManager.setWorld(dim, null);
                }

                if (dir != null) {
                    if (backup) {
                        File parent = dir.getParentFile();
                        final Pattern pattern = Pattern.compile("^" + dir.getName() + "_bak-..*\\.zip$");
                        File[] files = parent.listFiles(new FilenameFilter() {
                            @Override
                            public boolean accept(File dir, String name) {
                                return pattern.matcher(name).matches();
                            }
                        });

                        if (files != null && files.length >= 5) {
                            Arrays.sort(files, new Comparator<File>() {
                                @Override
                                public int compare(File o1, File o2) {
                                    int i = CaveUtils.compareWithNull(o1, o2);

                                    if (i == 0 && o1 != null && o2 != null) {
                                        try {
                                            i = Files.getLastModifiedTime(o1.toPath())
                                                    .compareTo(Files.getLastModifiedTime(o2.toPath()));
                                        } catch (IOException e) {
                                        }
                                    }

                                    return i;
                                }
                            });

                            FileUtils.forceDelete(files[0]);
                        }

                        Calendar calendar = Calendar.getInstance();
                        String year = Integer.toString(calendar.get(Calendar.YEAR));
                        String month = String.format("%02d", calendar.get(Calendar.MONTH) + 1);
                        String day = String.format("%02d", calendar.get(Calendar.DATE));
                        String hour = String.format("%02d", calendar.get(Calendar.HOUR_OF_DAY));
                        String minute = String.format("%02d", calendar.get(Calendar.MINUTE));
                        String second = String.format("%02d", calendar.get(Calendar.SECOND));
                        File bak = new File(parent,
                                dir.getName() + "_bak-" + Joiner.on("").join(year, month, day) + "-"
                                        + Joiner.on("").join(hour, minute, second) + ".zip");

                        if (bak.exists()) {
                            FileUtils.deleteQuietly(bak);
                        }

                        component = new ChatComponentText(StatCollector
                                .translateToLocalFormatted("caveworld.regenerate.backingup", name));
                        component.getChatStyle().setColor(EnumChatFormatting.GRAY).setItalic(true);
                        server.getConfigurationManager().sendChatMsg(component);

                        Caveworld.network.sendToAll(new RegenerateMessage.ProgressNotify(1));

                        if (CaveUtils.archiveDirZip(dir, bak)) {
                            ClickEvent click = new ClickEvent(ClickEvent.Action.OPEN_FILE,
                                    FilenameUtils.normalize(bak.getParentFile().getPath()));

                            component = new ChatComponentText(StatCollector
                                    .translateToLocalFormatted("caveworld.regenerate.backedup", name));
                            component.getChatStyle().setColor(EnumChatFormatting.GRAY).setItalic(true)
                                    .setChatClickEvent(click);
                            server.getConfigurationManager().sendChatMsg(component);
                        } else {
                            component = new ChatComponentText(StatCollector
                                    .translateToLocalFormatted("caveworld.regenerate.backup.failed", name));
                            component.getChatStyle().setColor(EnumChatFormatting.RED).setItalic(true);
                            server.getConfigurationManager().sendChatMsg(component);
                        }
                    }

                    FileUtils.deleteDirectory(dir);
                }

                if (DimensionManager.shouldLoadSpawn(dim)) {
                    DimensionManager.initDimension(dim);

                    world = DimensionManager.getWorld(dim);

                    if (world != null) {
                        world.saveAllChunks(true, null);
                        world.flush();
                    }
                }

                CaveBlocks.caveworld_portal.portalDisabled = false;

                component = new ChatComponentText(
                        StatCollector.translateToLocalFormatted("caveworld.regenerate.regenerated", name));
                component.getChatStyle().setColor(EnumChatFormatting.GRAY).setItalic(true);
                server.getConfigurationManager().sendChatMsg(component);

                Caveworld.network.sendToAll(new RegenerateMessage.ProgressNotify(2));

                return true;
            } catch (Exception e) {
                component = new ChatComponentText(
                        StatCollector.translateToLocalFormatted("caveworld.regenerate.failed", name));
                component.getChatStyle().setColor(EnumChatFormatting.RED).setItalic(true);
                server.getConfigurationManager().sendChatMsg(component);

                Caveworld.network.sendToAll(new RegenerateMessage.ProgressNotify(3));

                CaveLog.log(Level.ERROR, e, component.getUnformattedText());
            }

            return false;
        }
    });

    if (result && (Config.hardcore || Config.caveborn)) {
        for (EntityPlayerMP player : target) {
            if (!CaveworldAPI.isEntityInCaveworld(player)) {
                CaveUtils.forceTeleport(player, CaveworldAPI.getDeepDimension());
            }
        }
    }
}

From source file:com.chingo247.structureapi.plan.io.StructurePlanReader.java

public List<IStructurePlan> readDirectory(File structurePlanDirectory) {
    return readDirectory(structurePlanDirectory, false, new ForkJoinPool());
}