protected String key;

    protected String charsetName = CoreLibConstants.UTF_8;

    protected Queue<Cipher> encryptoQueue = new ConcurrentLinkedQueue<>();

    protected Queue<Cipher> decryptoQueue = new ConcurrentLinkedQueue<>();

    public byte[] encrypto(final byte[] data) {
        final Cipher cipher = pollEncryptoCipher();
        byte[] encrypted;
        try {

import static java.util.Objects.requireNonNull;

import com.google.common.collect.Queues;
import java.util.Iterator;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;

/**
 * Handler for dispatching events to subscribers, providing different event ordering guarantees that
 * make sense for different situations.
 *

import static org.junit.Assert.assertThrows;

import com.google.common.util.concurrent.UncheckedExecutionException;
import java.util.ArrayList;
import java.util.List;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.function.IntConsumer;
import java.util.stream.IntStream;
import junit.framework.TestCase;