Examples of java.util.Random$RandomIntsSpliterator

java.util.Random
Spliterator for int streams. We multiplex the four int versions into one class by treating a bound less than origin as unbounded, and also by treating "infinite" as equivalent to Long.MAX_VALUE. For splits, it uses the standard divide-by-two approach. The long and double versions of this class are identical except for types.

{
   public void testArrayRepl() throws CloneNotSupportedException
   {
      int streamsize = 11000;
      byte[] b = new byte[streamsize];
      new Random().nextBytes(b);
      Cache<String, byte[]> cache1 = null, cache2 = null;


      try
      {
         Configuration c = new Configuration();

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   protected void threadSafetyTest(final boolean singleFqn) throws Exception
   {
      final CountDownLatch latch = new CountDownLatch(1);
      final Fqn fqn = Fqn.fromString("/a/b/c");
      final List<Fqn> fqns = new ArrayList<Fqn>(30);
      final Random r = new Random();
      if (!singleFqn)
      {
         for (int i = 0; i < 30; i++)
         {
            Fqn f = Fqn.fromString("/a/b/c/" + i);
            fqns.add(f);
            cache2.put(f, "k", "v");
            cache1.evict(f);
         }
      }
      else
      {
         cache2.put(fqn, "k", "v");
         cache1.evict(fqn);
      }
      final int loops = 25; // was 300
      final Set<Exception> exceptions = new CopyOnWriteArraySet<Exception>();


      Thread evictor = new Thread("Evictor")
      {
         public void run()
         {
            try
            {
               latch.await();
               for (int i = 0; i < loops; i++)
               {
                  Fqn f = singleFqn ? fqn : fqns.get(r.nextInt(fqns.size()));
                  cache1.evict(f);
                  TestingUtil.sleepRandom(50);
               }
            }
            catch (TimeoutException te)
            {
               // doesn't matter if we hit these on occasion
            }
            catch (Exception e)
            {
               exceptions.add(e);
            }
         }
      };


      evictor.start();


      Thread writer = new Thread("Writer")
      {
         public void run()
         {
            try
            {
               latch.await();
               for (int i = 0; i < loops; i++)
               {
                  Fqn f = singleFqn ? fqn : fqns.get(r.nextInt(fqns.size()));
                  cache2.put(f, "k", "v");
                  TestingUtil.sleepRandom(50);
               }
            }
            catch (Exception e)
            {
               exceptions.add(e);
            }
         }
      };


      writer.start();




      Thread reader1 = new Thread("Reader-1")
      {
         public void run()
         {
            try
            {
               latch.await();
               for (int i = 0; i < loops; i++)
               {
                  loader1.get(singleFqn ? fqn : fqns.get(r.nextInt(fqns.size())));
                  TestingUtil.sleepRandom(50);
               }
            }
            catch (Exception e)
            {
               exceptions.add(e);
            }
         }
      };
      reader1.start();


      Thread reader2 = new Thread("Reader-2")
      {
         public void run()
         {
            try
            {
               latch.await();
               for (int i = 0; i < loops; i++)
               {
                  loader1.getChildrenNames(singleFqn ? fqn.getParent() : fqns.get(r.nextInt(fqns.size())).getParent());
                  TestingUtil.sleepRandom(50);
               }
            }
            catch (Exception e)
            {
               exceptions.add(e);
            }
         }
      };
      reader2.start();


      Thread reader3 = new Thread("Reader-3")
      {
         public void run()
         {
            try
            {
               latch.await();
               for (int i = 0; i < loops; i++)
               {
                  loader1.getChildrenNames(singleFqn ? fqn : fqns.get(r.nextInt(fqns.size())));
                  TestingUtil.sleepRandom(50);
               }
            }
            catch (Exception e)
            {

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   protected void threadSafetyTest(final boolean singleFqn) throws Exception
   {
      final CountDownLatch latch = new CountDownLatch(1);
      final Fqn fqn = Fqn.fromString("/a/b/c");
      final List<Fqn> fqns = new ArrayList<Fqn>(30);
      final Random r = new Random();
      if (!singleFqn)
      {
         for (int i = 0; i < 30; i++)
         {
            Fqn f = Fqn.fromString("/a/b/c/" + i);
            fqns.add(f);
            loader.put(f, "k", "v");
         }
      }
      else
      {
         loader.put(fqn, "k", "v");
      }
      final int loops = 100;
      final Set<Exception> exceptions = new CopyOnWriteArraySet<Exception>();


      Thread remover1 = new Thread("Remover-1")
      {
         public void run()
         {
            try
            {
               latch.await();
               for (int i = 0; i < loops; i++)
               {
                  loader.remove(singleFqn ? fqn : fqns.get(r.nextInt(fqns.size())));
               }
            }
            catch (Exception e)
            {
               exceptions.add(e);
            }
         }
      };


      remover1.start();


      Thread remover2 = new Thread("Remover-2")
      {
         public void run()
         {
            try
            {
               latch.await();
               for (int i = 0; i < loops; i++)
               {
                  loader.remove(singleFqn ? fqn : fqns.get(r.nextInt(fqns.size())), "k");
               }
            }
            catch (Exception e)
            {
               exceptions.add(e);
            }
         }
      };


      remover2.start();




      Thread reader1 = new Thread("Reader-1")
      {
         public void run()
         {
            try
            {
               latch.await();
               for (int i = 0; i < loops; i++)
               {
                  loader.get(singleFqn ? fqn : fqns.get(r.nextInt(fqns.size())));
               }
            }
            catch (Exception e)
            {
               exceptions.add(e);
            }
         }
      };
      reader1.start();


      Thread reader2 = new Thread("Reader-2")
      {
         public void run()
         {
            try
            {
               latch.await();
               for (int i = 0; i < loops; i++)
               {
                  loader.getChildrenNames(singleFqn ? fqn : fqns.get(r.nextInt(fqns.size())));
               }
            }
            catch (Exception e)
            {
               exceptions.add(e);
            }
         }
      };
      reader2.start();




      Thread writer1 = new Thread("Writer-1")
      {
         public void run()
         {
            try
            {
               latch.await();
               for (int i = 0; i < loops; i++)
               {
                  loader.put(singleFqn ? fqn : fqns.get(r.nextInt(fqns.size())), "k", "v");
               }
            }
            catch (Exception e)
            {
               exceptions.add(e);
            }
         }
      };
      writer1.start();


      Thread writer2 = new Thread("Writer-2")
      {
         public void run()
         {
            try
            {
               latch.await();
               for (int i = 0; i < loops; i++)
               {
                  loader.put(singleFqn ? fqn : fqns.get(r.nextInt(fqns.size())), new HashMap<Object, Object>());
               }
            }
            catch (Exception e)
            {
               exceptions.add(e);

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        test(false, len);
        test(true, len);
    }


    private static void test(boolean fast, int len) {
        Random random = new Random(10);
        long time = System.currentTimeMillis();
        byte[] bin = new byte[len];
        random.nextBytes(bin);
        for (int i = 0; i < len; i++) {
            byte[] dec;
            if (fast) {
                byte[] enc = encodeFast(bin);
                dec = decodeFast(enc);

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  protected Destination getDestination() {
    if ((cluster != null) && ! cluster.isEmpty()) {
      Destination dest = null;
      String location = System.getProperty("location");
      if (location == null || location.equals("")) {
        int idx = new Random().nextInt(cluster.size());


        Object key[] = cluster.keySet().toArray();
        location = (String) key[idx];
        System.setProperty("location", location);
      }

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        }
    }


    public Random getRandom() {
        if (random == null) {
            random = new Random();
        }
        return random;
    }

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  protected ConnectionFactory getConnectionFactory() {
    if ((cluster != null) && ! cluster.isEmpty()) {
      ConnectionFactory cf = null;
      String location = System.getProperty("location");
      if (location == null || location.equals("")) {
        int idx = new Random().nextInt(cluster.size());


        Object key[] = cluster.keySet().toArray();
        location = (String) key[idx];
        System.setProperty("location", location);
      }

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        prep.setInt(1, 2);
        prep.setString(2, "face");
        prep.setString(3, "face");
        prep.execute();


        Random random = new Random(1);
        prep.setInt(1, 3);
        byte[] large = new byte[getSize(10 * 1024, 100 * 1024)];
        random.nextBytes(large);
        prep.setBytes(2, large);
        String largeText = new String(large, "ISO-8859-1");
        prep.setString(3, largeText);
        prep.execute();

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        test.test();
        test.test();
    }


    public void test() throws SQLException {
        Random random = new Random();
        for (int i = 0; i < getSize(1, 4); i++) {
            testAddDelete();
            int seed = random.nextInt();
            testCase(seed);
        }
    }

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    private void testOne(int seed) throws SQLException {
        org.h2.Driver.load();
        deleteDb("index");
        printTime("testIndex " + seed);
        Random random = new Random(seed);
        int distinct, prefixLength;
        if (random.nextBoolean()) {
            distinct = random.nextInt(8000) + 1;
            prefixLength = random.nextInt(8000) + 1;
        } else if (random.nextBoolean()) {
            distinct = random.nextInt(16000) + 1;
            prefixLength = random.nextInt(100) + 1;
        } else {
            distinct = random.nextInt(10) + 1;
            prefixLength = random.nextInt(10) + 1;
        }
        boolean delete = random.nextBoolean();
        StringBuilder buff = new StringBuilder();
        for (int j = 0; j < prefixLength; j++) {
            buff.append("x");
            if (buff.length() % 10 == 0) {
                buff.append(buff.length());
            }
        }
        String prefix = buff.toString().substring(0, prefixLength);
        DeleteDbFiles.execute(getBaseDir() + "/index", null, true);
        Connection conn = getConnection("index");
        try {
            Statement stat = conn.createStatement();
            stat.execute("CREATE TABLE a(text VARCHAR PRIMARY KEY)");
            PreparedStatement prepInsert = conn.prepareStatement("INSERT INTO a VALUES(?)");
            PreparedStatement prepDelete = conn.prepareStatement("DELETE FROM a WHERE text=?");
            PreparedStatement prepDeleteAllButOne = conn.prepareStatement("DELETE FROM a WHERE text <> ?");
            int count = 0;
            for (int i = 0; i < 1000; i++) {
                int y = random.nextInt(distinct);
                try {
                    prepInsert.setString(1, prefix + y);
                    prepInsert.executeUpdate();
                    count++;
                } catch (SQLException e) {
                    if (e.getSQLState().equals("23505")) {
                        // ignore
                    } else {
                        TestBase.logError("error", e);
                        break;
                    }
                }
                if (delete && random.nextInt(10) == 1) {
                    if (random.nextInt(4) == 1) {
                        try {
                            prepDeleteAllButOne.setString(1, prefix + y);
                            int deleted = prepDeleteAllButOne.executeUpdate();
                            if (deleted < count - 1) {
                                printError(seed, "deleted:" + deleted + " i:" + i);

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