Example usage for java.util UUID randomUUID

Introduction

In this page you can find the example usage for java.util UUID randomUUID.

Prototype

public static UUID randomUUID()

Source Link

Document

Static factory to retrieve a type 4 (pseudo randomly generated) UUID.

Usage

From source file:Main.java

public static void main(String[] args) {
    // creating UUID      
    UUID uid = UUID.randomUUID();

    // checking node value
    System.out.println("Node value is: " + uid.node());
}

From source file:Main.java

public static void main(String[] args) {
    // creating UUIDs      
    UUID u1 = UUID.randomUUID();
    UUID u2 = UUID.randomUUID();

    // comparing uuids
    System.out.println("Comparing two UUIDs: " + u1.compareTo(u2));
}

From source file:Main.java

public static void main(String[] args) {
    // creating two UUIDs      
    UUID u1 = UUID.randomUUID();
    UUID u2 = UUID.randomUUID();

    // checking equality
    System.out.println("Is two UUIDs equal: " + u1.equals(u2));
}

From source file:Main.java

public static void main(final String[] args) {
    ConcurrentHashMap<Integer, UUID> concurrentHashMap = new ConcurrentHashMap<>();

    for (int i = 0; i < 100; i++) {
        concurrentHashMap.put(i, UUID.randomUUID());
    }/*  w  w  w.  j a  v  a  2 s .  co  m*/

    int threshold = 1;

    concurrentHashMap.forEachValue(threshold, System.out::println);

    concurrentHashMap.forEach((id, uuid) -> {
        if (id % 10 == 0) {
            System.out.println(String.format("%s: %s", id, uuid));
        }
    });

    String searchResult = concurrentHashMap.search(threshold, (id, uuid) -> {
        if (String.valueOf(uuid).contains(String.valueOf(id))) {
            return new String(id + ":" + uuid);
        }
        return null;
    });

    System.out.println(searchResult);
}

From source file:Main.java

public static void main(String[] args) {
    Map<String, String> map = new ConcurrentHashMap<String, String>();
    for (int i = 0; i < MAP_SIZE; i++) {
        map.put("key:" + i, UUID.randomUUID().toString());
    }//from  ww w. j a v a2s .c om
    ExecutorService executor = Executors.newCachedThreadPool();
    Accessor a1 = new Accessor(map);
    Accessor a2 = new Accessor(map);
    Mutator m = new Mutator(map);
    executor.execute(a1);
    executor.execute(m);
    executor.execute(a2);
}

From source file:com.mycompany.integration.NewMain.java

/**
 * @param args the command line arguments
 *///from w ww. j a v a  2  s  .  com
public static void main(String[] args) {
    ApplicationContext context = new ClassPathXmlApplicationContext("spring-integration.xml");

    MessageChannel channel = context.getBean("toRabbit", MessageChannel.class);

    for (int i = 0; i < 10; i++) {
        channel.send(build(UUID.randomUUID().toString()));
    }
}

From source file:com.doctor.ignite.example.spring.CrossCacheQueries.java

public static void main(String[] args) throws InterruptedException {
    AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext(
            SpringIgniteConfig.class);
    Ignite ignite = applicationContext.getBean(Ignite.class);

    CacheConfiguration<UUID, Person> cacheConfiguration = applicationContext
            .getBean("CacheConfigurationForDays", CacheConfiguration.class);

    IgniteCache<UUID, Person> igniteCache1 = getCache("person1", ignite, cacheConfiguration);

    Person person = new Person(UUID.randomUUID(), "doctor -1 ", BigDecimal.valueOf(88888888.888), "man", "...");
    igniteCache1.put(person.getId(), person);

    Person person1 = new Person(UUID.randomUUID(), "doctor 118", BigDecimal.valueOf(88888888.888), "man",
            "...");
    igniteCache1.put(person1.getId(), person1);

    Person person2 = new Person(UUID.randomUUID(), "doctor who 88 ", BigDecimal.valueOf(188888888.888), "man",
            "...");
    igniteCache1.put(person2.getId(), person2);

    IgniteCache<UUID, Person> igniteCache2 = getCache("person2", ignite, cacheConfiguration);

    Person person3 = new Person(UUID.randomUUID(), "doctor who ---88 ", BigDecimal.valueOf(1188888888.888),
            "man", "...");
    igniteCache2.put(person3.getId(), person3);

    // try (QueryCursor<List<?>> queryCursor = igniteCache1.query(new SqlFieldsQuery("select name from Person"))) {
    // for (List<?> entry : queryCursor) {
    // System.out.println("--}}}}}" + entry);
    // }//from   w  w w. j  ava  2  s. com
    // }

    SqlQuery sqlQuery = new SqlQuery<>(Person.class, "from Person , \"person2\".Person  ");
    try (QueryCursor queryCursor = igniteCache1.query(sqlQuery)) {
        for (Object object : queryCursor) {
            System.out.println(object);
        }
    }

    applicationContext.close();
}

From source file:com.doctor.ignite.example.spring.SqlUnion.java

public static void main(String[] args) throws InterruptedException {
    AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext(
            SpringIgniteConfig.class);
    Ignite ignite = applicationContext.getBean(Ignite.class);

    CacheConfiguration<UUID, Person> cacheConfiguration = applicationContext
            .getBean("CacheConfigurationForDays", CacheConfiguration.class);

    IgniteCache<UUID, Person> igniteCache1 = getCache("person1", ignite, cacheConfiguration);

    Person person = new Person(UUID.randomUUID(), "doctor -1 ", BigDecimal.valueOf(88888888.888), "man", "...");
    igniteCache1.put(person.getId(), person);

    Person person1 = new Person(UUID.randomUUID(), "doctor 118", BigDecimal.valueOf(88888888.888), "man",
            "...");
    igniteCache1.put(person1.getId(), person1);

    Person person2 = new Person(UUID.randomUUID(), "doctor who 88 ", BigDecimal.valueOf(188888888.888), "man",
            "...");
    igniteCache1.put(person2.getId(), person2);

    IgniteCache<UUID, Person> igniteCache2 = getCache("person2", ignite, cacheConfiguration);

    Person person3 = new Person(UUID.randomUUID(), "doctor who ---88 ", BigDecimal.valueOf(1188888888.888),
            "man", "...");
    igniteCache2.put(person3.getId(), person3);

    SqlFieldsQuery sqlFieldsQuery = new SqlFieldsQuery(
            "select _val from Person  union all select _val from \"person2\".Person");

    try (QueryCursor queryCursor = igniteCache1.query(sqlFieldsQuery)) {
        for (Object object : queryCursor) {
            System.out.println(object);
        }//from w  w  w. j  a v a 2 s .  c o  m
    }

    applicationContext.close();
}

From source file:ch.rasc.wampspring.demo.client.CallClient.java

public static void main(String[] args) throws InterruptedException {
    WebSocketClient webSocketClient = new StandardWebSocketClient();
    JsonFactory jsonFactory = new MappingJsonFactory(new ObjectMapper());

    CountDownLatch latch = new CountDownLatch(1_000_000);
    TestTextWebSocketHandler handler = new TestTextWebSocketHandler(jsonFactory, latch);

    Long[] start = new Long[1];
    ListenableFuture<WebSocketSession> future = webSocketClient.doHandshake(handler,
            "ws://localhost:8080/wamp");
    future.addCallback(wss -> {//w ww  .  ja va 2s  . co m
        start[0] = System.currentTimeMillis();
        for (int i = 0; i < 1_000_000; i++) {

            CallMessage callMessage = new CallMessage(UUID.randomUUID().toString(), "testService.sum", i,
                    i + 1);
            try {
                wss.sendMessage(new TextMessage(callMessage.toJson(jsonFactory)));
            } catch (Exception e) {
                System.out.println("ERROR SENDING CALLMESSAGE" + e);
                latch.countDown();
            }
        }

    }, t -> {
        System.out.println("DO HANDSHAKE ERROR: " + t);
        System.exit(1);
    });

    if (!latch.await(3, TimeUnit.MINUTES)) {
        System.out.println("SOMETHING WENT WRONG");
    }

    System.out.println((System.currentTimeMillis() - start[0]) / 1000 + " seconds");
    System.out.println("SUCCESS: " + handler.getSuccess());
    System.out.println("ERROR  : " + handler.getError());
}

From source file:backup.store.ExternalExtendedBlockSort.java

public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();
    Path dir = new Path("file:///home/apm/Development/git-projects/hdfs-backup/hdfs-backup-core/tmp");
    dir.getFileSystem(conf).delete(dir, true);
    long start = System.nanoTime();
    try (ExternalExtendedBlockSort<LongWritable> sort = new ExternalExtendedBlockSort<>(conf, dir,
            LongWritable.class)) {
        Random random = new Random();
        for (int bp = 0; bp < 1; bp++) {
            String bpid = UUID.randomUUID().toString();
            for (int i = 0; i < 10000000; i++) {
                // for (int i = 0; i < 10; i++) {
                long genstamp = random.nextInt(20000);
                long blockId = random.nextLong();
                ExtendedBlock extendedBlock = new ExtendedBlock(bpid, blockId,
                        random.nextInt(Integer.MAX_VALUE), genstamp);
                sort.add(extendedBlock, new LongWritable(blockId));
            }/*from   ww w.  jav  a  2s . c  o  m*/
        }
        System.out.println("finished");
        sort.finished();
        System.out.println("interate");
        for (String blockPoolId : sort.getBlockPoolIds()) {
            ExtendedBlockEnum<LongWritable> blockEnum = sort.getBlockEnum(blockPoolId);
            ExtendedBlock block;
            long l = 0;
            while ((block = blockEnum.next()) != null) {
                // System.out.println(block);
                long blockId = block.getBlockId();
                l += blockId;
                LongWritable currentValue = blockEnum.currentValue();
                if (currentValue.get() != blockId) {
                    System.err.println("Error " + blockId);
                }
            }
            System.out.println(l);
        }
    }
    long end = System.nanoTime();
    System.out.println("Time [" + (end - start) / 1000000.0 + " ms]");
}