Examples with Random java.util.Random used on opensource projects

Example 1 with Random

use of java.util.Random in project camel by apache.

the class ConsulKeyValueWatchTest method doPreSetup.

@Override
public void doPreSetup() {
    key = generateKey();
    client = getConsul().keyValueClient();
    random = new Random();
}

Example 2 with Random

use of java.util.Random in project camel by apache.

the class EhcacheTestSupport method generateRandomArrayOfInt.

protected static int[] generateRandomArrayOfInt(int size, int lower, int upper) {
    Random random = new Random();
    int[] array = new int[size];
    Arrays.setAll(array, i -> random.nextInt(upper - lower) + lower);
    return array;
}

Example 3 with Random

use of java.util.Random in project camel by apache.

the class ExpressionBuilder method randomExpression.

/**
     * Returns a random number between min and max
     */
public static Expression randomExpression(final int min, final int max) {
    return new ExpressionAdapter() {

        public Object evaluate(Exchange exchange) {
            Random random = new Random();
            int randomNum = random.nextInt(max - min) + min;
            return randomNum;
        }

        @Override
        public String toString() {
            return "random";
        }
    };
}

Example 4 with Random

use of java.util.Random in project camel by apache.

the class ExpressionBuilder method randomExpression.

/**
     * Returns a random number between min and max
     */
public static Expression randomExpression(final String min, final String max) {
    return new ExpressionAdapter() {

        public Object evaluate(Exchange exchange) {
            int num1 = simpleExpression(min).evaluate(exchange, Integer.class);
            int num2 = simpleExpression(max).evaluate(exchange, Integer.class);
            Random random = new Random();
            int randomNum = random.nextInt(num2 - num1) + num1;
            return randomNum;
        }

        @Override
        public String toString() {
            return "random";
        }
    };
}

Example 5 with Random

use of java.util.Random in project camel by apache.

the class RedeliveryPolicy method calculateRedeliveryDelay.

/**
     * Calculates the new redelivery delay based on the last one
     *
     * @param previousDelay  previous redelivery delay
     * @param redeliveryCounter  number of previous redelivery attempts
     * @return the calculate delay
     */
public long calculateRedeliveryDelay(long previousDelay, int redeliveryCounter) {
    if (ObjectHelper.isNotEmpty(delayPattern)) {
        // calculate delay using the pattern
        return calculateRedeliverDelayUsingPattern(delayPattern, redeliveryCounter);
    }
    // calculate the delay using the conventional parameters
    long redeliveryDelayResult;
    if (previousDelay == 0) {
        redeliveryDelayResult = redeliveryDelay;
    } else if (useExponentialBackOff && backOffMultiplier > 1) {
        redeliveryDelayResult = Math.round(backOffMultiplier * previousDelay);
    } else {
        redeliveryDelayResult = previousDelay;
    }
    if (useCollisionAvoidance) {
        /*
             * First random determines +/-, second random determines how far to
             * go in that direction. -cgs
             */
        Random random = getRandomNumberGenerator();
        double variance = (random.nextBoolean() ? collisionAvoidanceFactor : -collisionAvoidanceFactor) * random.nextDouble();
        redeliveryDelayResult += redeliveryDelayResult * variance;
    }
    // ensure the calculated result is not bigger than the max delay (if configured)
    if (maximumRedeliveryDelay > 0 && redeliveryDelayResult > maximumRedeliveryDelay) {
        redeliveryDelayResult = maximumRedeliveryDelay;
    }
    return redeliveryDelayResult;
}