amqp-rabbit-spring-boot-autoconfigure

The goal of this project is to create Spring-Boot starter which allows integrate with RabbitMQ only via properties. You don't need to write code for creating connections, queues, exchanges, bindings and etc. Besides it allows to connect to multiple RabbitMQ instances separately.

All configurations are based on spring-amqp abstractions.

Compatability

Quick start

• Add dependencies:

      <dependency>
          <groupId>com.github.eugenemsv.amqp.rabbit</groupId>
          <artifactId>amqp-rabbit-spring-boot-autoconfigure</artifactId>
          <version>${version}</version>
      </dependency>
      
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-messaging</artifactId>
      </dependency>
      
      <dependency>
          <groupId>org.springframework.amqp</groupId>
          <artifactId>spring-rabbit</artifactId>
      </dependency>

• Add to properties file:

  local.jms.host=localhost
  local.jms.port=5672
  local.jms.user=guest
  local.jms.password=guest
  local.jms.vHost=/
  queue.rabbit.management.configurations.local.connection-prefix=local.jms
  queue.rabbit.management.configurations.local.queues.firstQueue.name=simple-queue
  queue.rabbit.management.configurations.local.queues.firstQueue.durable=true

• Add bean with method:

  @RabbitListener(queues = "${queue.rabbit.management.configurations.local.queues.firstQueue.name}")
  public void handleMessage(org.springframework.amqp.core.Message message) {
      System.out.println("Got message="+message);
  }

• Run application and publish message to the simple-queue via Rabbit Management Plugin web ui.

Documentation

• Definitions:

  • <connection-name> - any name associated with one RabbitMQ, takes part in creation of all library beans.
  • <queue-key> - any key associated with one Queue, takes part in queues and bindings creation.
  • <topic-exchange-key> - any key associated with one TopicExchange, takes part in topic exchanges and bindings creation.
  • <routing-key-name> - any name associated with one routingKey, takes part in bindings creation.

• Configuring properties:

  • Bind <connection-name> with RabbitMQ instance

    queue.rabbit.management.configurations.local.connection-prefix=local.jms
    
    local.jms.host=localhost
    local.jms.port=5672
    local.jms.user=guest
    local.jms.password=guest
    local.jms.vHost=/

    host, port, user, password, vHost - required properties

  • Message serialization is customized by org.springframework.amqp.support.converter.MessageConverter. The library adds Jackson2JsonMessageConverter as a default message converter to all connected RabbitMQ instances, you can provide custom message converter by adding your bean to context. Jackson2JsonMessageConverter uses com.fasterxml.jackson.databind.ObjectMapper if there is no ObjectMapper in the context, than library will provide its own instance of ObjectMapper.

    If you don't want use library's MessageConverter and you don't need its ObjectMapper you should set property:

    queue.rabbit.management.custom-object-mapper=true

  • There is an ability to add retry support (see the documentation for details)

    queue.rabbit.management.configurations.<connection-name>.retry.maxAttempts=3
    queue.rabbit.management.configurations.<connection-name>.retry.initial-interval=1000
    queue.rabbit.management.configurations.<connection-name>.retry.multiplier=1.0
    queue.rabbit.management.configurations.<connection-name>.retry.maxI-interval=10000

  • Exception handling

     queue.rabbit.management.configurations.<connection-name>.defaultRequeueRejected

  • Concurrency settings for all listeners in one connection:

      queue.rabbit.management.configurations.<connection-name>.listener.concurrentConsumers
      queue.rabbit.management.configurations.<connection-name>.listener.maxConcurrentConsumers

  • Concurrency settings for listeners by queue:

      queue.rabbit.management.configurations.<connection-name>.queues.<queue-key>.listener.concurrentConsumers=<value>
      queue.rabbit.management.configurations.<connection-name>.queues.<queue-key>.listener.maxConcurrentConsumers=<value>

    Since listener can listen simultaneously more than one queue there are such options:

    1. Only one listening queue has concurrency properties. In that case listener will be setup according this properties.

    2. None of queues don't have concurrency properties. Listener will work in sequential way or according to:

       queue.rabbit.management.configurations.<connection-name>.listener.concurrentConsumers=<value>
       queue.rabbit.management.configurations.<connection-name>.listener.maxConcurrentConsumers=<value>

    3. Two or more queues have concurrency properties. There will be chosen configuration with highest maxConcurrentConsumers value.

  • Support of fail fast behavior during startup.

     queue.rabbit.management.configurations.<connection-name>.mismatchedQueuesFatal

    From official spring-amqp docs: This was added in version 1.6. When the container starts, if this property is true, the container checks that all queues declared in the context are compatible with queues already on the broker. If mismatched properties (e.g. auto-delete) or arguments (e.g. x-message-ttl) exist, the container (and application context) will fail to start with a fatal exception. If the problem is detected during recovery (e.g. after a lost connection), the container will be stopped.

  • For disabling configuration you need add:

     queue.rabbit.management.enabled=false

  • Default property values:

    queue.rabbit.management.enabled=false
    queue.rabbit.management.custom-object-mapper=false
    
    queue.rabbit.management.configurations.<connection-name>.retry.enabled=false
    queue.rabbit.management.configurations.<connection-name>.retry.maxAttempts=3
    queue.rabbit.management.configurations.<connection-name>.retry.initial-interval=1000
    queue.rabbit.management.configurations.<connection-name>.retry.multiplier=1.0
    queue.rabbit.management.configurations.<connection-name>.retry.maxI-interval=10000
    
    queue.rabbit.management.configurations.<connection-name>.mismatchedQueuesFatal=true
    queue.rabbit.management.configurations.<connection-name>.defaultRequeueRejected=true
    queue.rabbit.management.configurations.<connection-name>.dead-letter-suffix=.errors
    
    queue.rabbit.management.configurations.<connection-name>.listener.concurrentConsumers=1
    queue.rabbit.management.configurations.<connection-name>.listener.maxConcurrentConsumers=1
    
    queue.rabbit.management.configurations.<connection-name>.queues.<queue-key>.durable=false
    queue.rabbit.management.configurations.<connection-name>.queues.<queue-key>.exclusive=false
    queue.rabbit.management.configurations.<connection-name>.queues.<queue-key>.autoDelete=false
    queue.rabbit.management.configurations.<connection-name>.queues.<queue-key>.with-dead-letter=false
    queue.rabbit.management.configurations.<connection-name>.queues.<queue-key>.dead-letter-config.bidirectional=false
    queue.rabbit.management.configurations.<connection-name>.queues.<queue-key>.dead-letter-config.time-to-live=3600000
    
    
    queue.rabbit.management.configurations.<connection-name>.topicExchanges.<topic-exchange-key>.name=
    queue.rabbit.management.configurations.<connection-name>.topicExchanges.<topic-exchange-key>.durable=false
    queue.rabbit.management.configurations.<connection-name>.topicExchanges.<topic-exchange-key>.autoDelete=false
    
    queue.rabbit.management.configurations.<connection-name>.bindings.<queue-key>.<topic-exchange-key>.routingKeys.<routing-key-name>=*.*.*
    

• Other features:

  • Working with more than RabbitMQ instance you need carefully define listeners. Example:

    @RabbitListener(queues = "fakeQueueName", containerFactory = "localRabbitListenerContainerFactory",  admin="localRabbitAdmin")

    In order to get info about registered beans, just setup log level to debug for package com.github.eugenemsv.amqp.rabbit

  • Library automatically excludes org.springframework.boot.autoconfigure.amqp.RabbitAutoConfiguration

  • Each RabbitMQ connection has a name is built like this: ${spring.application.name}+<Connection-name>

  • In order to customize registration of bean definition you can provide custom implementation for com.github.eugenemsv.amqp.rabbit.bean.AmqpBeanDefinitionCustomizer and set full class name to the property queue.rabbit.management.bean.definition.customizer. Take care about no-args constructor in your custom implementation.

  • In order to customize creation of beans you can provide custom implementation for com.github.eugenemsv.amqp.rabbit.bean.AmqpBeansFactory and set bean name to the property queue.rabbit.management.bean.factory. Add custom implementation to the application context like ordinary bean.