Rqueue: Redis Queue,Task Queue, Delayed Queue for Spring and Spring Boot

Rqueue is an asynchronous task executor(worker) built for spring framework based on the spring framework's messaging library backed by Redis. It can be used as message broker as well, where all services code is in Spring.

Features

Message Scheduling : A message can be scheduled for any arbitrary period
Competing Consumers multiple messages can be consumed in parallel by different workers.
Message delivery: It's guaranteed that a message is consumed at least once. (Message would be consumed by a worker more than once due to the failure in the underlying worker/restart-process etc, otherwise exactly one delivery)
Redis cluster : Redis cluster can be used with driver.
Metrics : In flight messages, waiting for consumption and delayed messages
Web interface: a web interface to manage a queue and queue insights including latency
Automatic message serialization and deserialization
Concurrency: Concurrency of any queue can be configured
Queue Priority :
- Group level queue priority(weighted and strict)
- Sub queue priority(weighted and strict)
Execution Backoff : Exponential and fixed back off (default fixed back off)
Callbacks : Callbacks for dead letter queue, discard etc
Events 1. Bootstrap event 2. Task execution event.
Unique message : Unique message processing for a queue based on the message id
Redis connection: A different redis setup can be used for Rqueue

Getting Started

Dependency

Spring-boot

Get the latest one from Maven central

Add dependency

Gradle

    implementation 'com.github.sonus21:rqueue-spring-boot-starter:2.1.0-RELEASE'

Maven

 <dependency>
    <groupId>com.github.sonus21</groupId>
    <artifactId>rqueue-spring-boot-starter</artifactId>
    <version>2.1.0-RELEASE</version>
</dependency>

Spring framework

Get the latest one from Maven central

Add Dependency

Gradle

    implementation 'com.github.sonus21:rqueue-spring:2.1.0-RELEASE'

Maven

 <dependency>
   <groupId>com.github.sonus21</groupId>
   <artifactId>rqueue-spring</artifactId>
   <version>2.1.0-RELEASE</version>
 </dependency>

Add annotation EnableRqueue on application config class
Provide a RedisConnectionFactory bean

A Simple Spring Configuration

@EnableRqueue
public class Application{
  @Bean
  public RedisConnectionFactory redisConnectionFactory(){
    // return a redis connection factory
  }
}

Message publishing/Task submission

All messages need to be sent using RqueueMessageSender bean's enqueueXXX, enqueueInXXX and enqueueAtXXX methods. It has handful number of enqueue, enqueueIn, enqueueAt methods, we can use one of them based on the use case.

public class MessageService {
  @AutoWired private RqueueMessageSender rqueueMessageSender;
  
  public void doSomething(){
    rqueueMessageSender.enqueue("simple-queue", "Rqueue is configured");
  }
  
  public void createJOB(Job job){
    rqueueMessageSender.enqueue("job-queue", job);
  }
  
  // send notification in 30 seconds
   public void sendNotification(Notification notification){
    rqueueMessageSender.enqueueIn("notification-queue", notification, 30*1000L);
  }
  
  // enqueue At example
  public void createInvoice(Invoice invoice, Instant instant){
    rqueueMessageSender.enqueueAt("invoice-queue", invoice, instant);
  }
  
  // enqueue with priority, when sub queues are used as explained in the queue priority section.
  enum SmsPriority{
      CRITICAL("critical"),
      HIGH("high"),
      MEDIUM("medium"),
      LOW("low");
      private String value;
  } 
  public void sendSms(Sms sms, SmsPriority priority){
    rqueueMessageSender.enqueueWithPriority("sms-queue", priority.value(), sms);
  }
}

Worker/Consumer/Task executor/Listener

Any method that's part of spring bean, can be marked as worker/message listener using RqueueListener annotation

@Component
@Slf4j
public class MessageListener {
  @RqueueListener(value = "simple-queue")
  public void simpleMessage(String message) {
    log.info("simple-queue: {}", message);
  }

  @RqueueListener(value = "job-queue", numRetries="3", 
    deadLetterQueue="failed-job-queue", concurrency="5-10")
  public void onMessage(Job job) {
    log.info("Job alert: {}", job);
  }
  
  @RqueueListener(value = "push-notification-queue",numRetries="3", 
    deadLetterQueue="failed-notification-queue")
  public void onMessage(Notification notification) {
    log.info("Push notification: {}", notification);
  }
  
  @RqueueListener(value = "sms", priority="critical=10,high=8,medium=4,low=1")
  public void onMessage(Sms sms) {
    log.info("Sms : {}", sms);
  }
  
  @RqueueListener(value = "chat-indexing", priority="20", priorityGroup="chat")
  public void onMessage(ChatIndexing chatIndexing) {
    log.info("ChatIndexing message: {}", chatIndexing);
  }
  
  @RqueueListener(value = "chat-indexing-daily", priority="10", priorityGroup="chat")
  public void onMessage(ChatIndexing chatIndexing) {
    log.info("ChatIndexing message: {}", chatIndexing);
  }
  
  @RqueueListener(value = "chat-indexing-weekly", priority="5", priorityGroup="chat")
  public void onMessage(ChatIndexing chatIndexing) {
    log.info("ChatIndexing message: {}", chatIndexing);
  }
}

Queue Statistics

Dashboard

Link: http://localhost:8080/rqueue

In Production

If you're one of the Rqueue users, please raise a PR/issue to get your organization listed here.

Support

Please report bug,question,feature(s) to issue tracker.

You are most welcome for any pull requests for any feature/bug/enhancement. You would need Java8 and gradle to start with. In root build.gradle file comment out spring related versions, or set environment variables for Spring versions.

Please format your code with Google Java formatter.

//    springBootVersion = '2.1.0.RELEASE'
//    springVersion = '5.1.2.RELEASE'
//    springDataVersion = '2.1.2.RELEASE'
//    microMeterVersion = '1.1.0'

License

The Rqueue is released under version 2.0 of the Apache License.

rdwallis/rqueue