Sometimes you need to generate heavy CPU load in your app for testing purposes.
if you are using Spring, it will be very convenient to run multi-threaded password hashing:
public void runHeavyLoad() {
String pepper = "pepper"; // secret key used by password encoding
int iterations = 200000; // number of hash iteration
int hashWidth = 256; // hash with in bits
int threadCount = 1000; // simultaneous thread count to be run
for (int i = 0; i < threadCount; i++) {
final int finalI = i;
new Thread(() -> {
while(true) {
Pbkdf2PasswordEncoder pbkdf2PasswordEncoder = new Pbkdf2PasswordEncoder(pepper, iterations, hashWidth);
pbkdf2PasswordEncoder.encode(UUID.randomUUID().toString());
}
}).start();
}
}That code is non-blocking, so your program are not going to pause. If you want to pause, you may add the line to the end of runHeavyLoad() method:
Thread.sleep(Integer.MAX_VALUE);If you still have any questions, feel free to ask me in the comments under this article, or write me on promark33@gmail.com.