How to set primary rabbit template and rabbit connection factory - spring-boot

Question

I am facing some errors in a spring boot project where I am using spring integration to connect to RabbitMQ. I am doing the configuration for RabbitMQ in XML files like this:
<!-- RabbitMQ configuration -->
<rabbit:connection-factory
id="rabbitConnectionFactory_2"
host="${queuing.events.host}"
port="${queuing.events.port}"
username="${queuing.events.username}"
password="${queuing.events.password}"
virtual-host="${queuing.events.virtual-host}"
publisher-returns="true"/>
<rabbit:template id="amqpTemplate_2" connection-factory="rabbitConnectionFactory_2" />
<rabbit:admin id="rabbitAdmin_2" connection-factory="rabbitConnectionFactory_2"/>
<rabbit:listener-container connection-factory="rabbitConnectionFactory_2" auto-startup="true" requeue-rejected="false" />
<bean id="rabbitListenerContainerFactory_2" class="org.springframework.amqp.rabbit.config.SimpleRabbitListenerContainerFactory">
<property name="connectionFactory" ref="rabbitConnectionFactory_2"/>
</bean>
<!-- -->
But I am creating two of each component. How to set the primaries ones?
Now the problem comes here, I was using this version for spring cloud:
<spring-cloud.version>Dalston.SR2</spring-cloud.version>
And everything was working fine, but if I update the version to:
<spring-cloud.version>Edgware.RELEASE</spring-cloud.version>
This error is coming:
Description:
Parameter 0 of method rabbitSender in org.springframework.cloud.sleuth.zipkin2.sender.ZipkinRabbitSenderConfiguration required a single bean, but 2 were found:
- rabbitConnectionFactory: defined in null
- rabbitConnectionFactory_2: defined in null
Action:
Consider marking one of the beans as #Primary, updating the consumer to accept multiple beans, or using #Qualifier to identify the bean that should be consumed
And the error comes because of this dependency:
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-sleuth-zipkin</artifactId>
</dependency>
If I remove this dependency the error is not coming.
You can find an example project to reproduce this scenario. In the pom file you'll see this:
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<spring-cloud.version>Dalston.SR2</spring-cloud.version> <!-- it works with this version-->
<!-- <spring-cloud.version>Edgware.RELEASE</spring-cloud.version> --> <!-- doesn't work with this version-->
</properties>
<dependencies>
<!-- SPRING BOOT -->
<!-- it fails because of this dependency in that we are using Edgware.RELEASE version -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-sleuth-zipkin</artifactId>
</dependency>
...
https://github.com/fjmpaez911/spring-integration-zipkin-cloud
So I need to know how to set a primary configuration for RabbitMQ and in addition I think that could be an issue because this error only comes if I use this version Edgware.RELEASE
Am I missing something?

Answer 1

fran, in Edgware.RELEASE the <artifactId>spring-cloud-sleuth-zipkin</artifactId> will resolve Zipkin 2 dependencies try using <artifactId> spring-cloud-starter-zipkin-legacy</artifactId> instead

Answer 2

To define the primary connection factory for RabbitMQ in XML files, you can do something like this:
<!-- Here the primary connection -->
<bean id="rabbitConnectionFactory" primary="true" class="org.springframework.amqp.rabbit.connection.CachingConnectionFactory">
<constructor-arg value="${spring.rabbitmq.host}"/>
<property name="username" value="${spring.rabbitmq.username}"/>
<property name="password" value="${spring.rabbitmq.password}"/>
<property name="virtualHost" value="${spring.rabbitmq.virtual-host}"/>
</bean>
<!-- RabbitMQ configuration -->
<rabbit:connection-factory
id="rabbitConnectionFactory_2"
host="${queuing.events.host}"
port="${queuing.events.port}"
username="${queuing.events.username}"
password="${queuing.events.password}"
virtual-host="${queuing.events.virtual-host}"
publisher-returns="true"/>
<rabbit:template id="amqpTemplate_2" connection-factory="rabbitConnectionFactory_2" />
<rabbit:admin id="rabbitAdmin_2" connection-factory="rabbitConnectionFactory_2"/>
<rabbit:listener-container connection-factory="rabbitConnectionFactory_2" auto-startup="true" requeue-rejected="false" />
<bean id="rabbitListenerContainerFactory_2" class="org.springframework.amqp.rabbit.config.SimpleRabbitListenerContainerFactory">
<property name="connectionFactory" ref="rabbitConnectionFactory_2"/>
</bean>