Examples of com.fasterxml.uuid.impl.RandomBasedGenerator

com.fasterxml.uuid.impl.RandomBasedGenerator
Implementation of UUID generator that uses generation method 4.
Note on random number generation when using {@link SecureRandom} for random numbergeneration: the first time {@link SecureRandom} object is used, there is noticeable delay betweencalling the method and getting the reply. This is because SecureRandom has to initialize itself to reasonably random state. Thus, if you want to lessen delay, it may be be a good idea to either get the first random UUID asynchronously from a separate thread, or to use the other generateRandomBasedUUID passing a previously initialized SecureRandom instance. @since 3.0

    {
        // this test will attempt to check for reasonable behavior of the
        // generateRandomBasedUUID method
        
        // we need a instance to use
        RandomBasedGenerator uuid_gen = Generators.randomBasedGenerator();
        
        // for the random UUID generator, we will generate a bunch of
        // random UUIDs
        UUID uuid_array[] = new UUID[SIZE_OF_TEST_ARRAY];
        
        // now create the array of uuids
        for (int i = 0; i < uuid_array.length; i++)
        {
            uuid_array[i] = uuid_gen.generate();
        }
        
        // check that none of the UUIDs are null
        checkUUIDArrayForNonNullUUIDs(uuid_array);

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     * Factory method for constructing UUID generator that uses specified
     * random number generator for constructing UUIDs according to standard
     * method number 4.
     */
    public static RandomBasedGenerator randomBasedGenerator(Random rnd) {
        return new RandomBasedGenerator(rnd);
    }

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        // Whether to include namespace? Depends on whether we compare with JDK (which does not)
//        UUID namespaceForNamed = NAMESPACE;
        UUID namespaceForNamed = null;


        final RandomBasedGenerator secureRandomGen = Generators.randomBasedGenerator();
        final RandomBasedGenerator utilRandomGen = Generators.randomBasedGenerator(new java.util.Random(123));
        final TimeBasedGenerator timeGenPlain = Generators.timeBasedGenerator(nic);
        final TimeBasedGenerator timeGenSynced = Generators.timeBasedGenerator(nic,
                new com.fasterxml.uuid.ext.FileBasedTimestampSynchronizer());
        final StringArgGenerator nameGen = Generators.nameBasedGenerator(namespaceForNamed);

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Related Classes of com.fasterxml.uuid.impl.RandomBasedGenerator

com.fasterxml.uuid.Generators

com.fasterxml.uuid.UUIDGeneratorTest

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