java-rate-limit

Java library to embed rate limit control functionality inside applications.

Usage

import org.sputnik.ratelimit.domain.CanDoResponse;import org.sputnik.ratelimit.service.JedisConfiguration;
import org.sputnik.ratelimit.service.RateLimiter;

class LoginManager {
    // Configure rate limiter to allow maximum 3 attempts every hour.
  RateLimiter vc = new RateLimiter(JedisConfiguration.builder().setHost("localhost").build(), 
		new EventConfig("testLogin", 3, Duration.ofSeconds(3600)));
	
  private boolean doLogin(String username, String password) {
    boolean isValid = false;
    CanDoResponse response = vc.canDoEvent("testLogin", username);
    if (response.getCanDo()) {
      vc.doEvent("testLogin", username);
      // TODO: check credentials and set isValid value
    } else {
      log.warn("User " + username + " blocked due to exceeding number of login attempt, for " + (response.getWaitMillis()/1000) + " seconds");
      isValid = false;
    }
		
    if (isValid) {
      vc.reset("testLogin", username);
    }
		
    return isValid;
  }
} 

Maven & Gradle

For maven integration simply add this dependency to your pom.xml:

<dependency>
    <groupId>net.saltando</groupId>
    <artifactId>java-rate-limit</artifactId>
    <version>x.y.z</version>
</dependency>

For gradle integration simply add this dependency:

compile 'net.saltando:java-rate-limit:x.y.z'

Where x.y.x is the desired version, always lastest versions is recommended, you can find it at Releases tab.

Javadoc

Javadoc is available at https://javadoc.jitpack.io/com/github/jfisbein/java-rate-limit/latest/javadoc/index.html

Limitations

As no synchronization method is implemented, some edge race conditions could lead to get a false positive or negative response from the method canDoEvent.