what is correct use of consumer groups in spring cloud stream dataflow and rabbitmq? - rabbitmq

Question

A follow up to this:
one SCDF source, 2 processors but only 1 processes each item
The 2 processors (del-1 and del-2) in the picture are receiving the same data within milliseconds of each other. I'm trying to rig this so del-2 never receives the same thing as del-1 and vice versa. So obviously I've got something configured incorrectly but I'm not sure where.
My processor has the following application.properties
spring.application.name=${vcap.application.name:sample-processor}
info.app.name=#project.artifactId#
info.app.description=#project.description#
info.app.version=#project.version#
management.endpoints.web.exposure.include=health,info,bindings
spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration
spring.cloud.stream.bindings.input.group=input
Is "spring.cloud.stream.bindings.input.group" specified correctly?
Here's the processor code:
#Transformer(inputChannel = Processor.INPUT, outputChannel = Processor.OUTPUT)
public Object transform(String inputStr) throws InterruptedException{
ApplicationLog log = new ApplicationLog(this, "timerMessageSource");
String message = " I AM [" + inputStr + "] AND I HAVE BEEN PROCESSED!!!!!!!";
log.info("SampleProcessor.transform() incoming inputStr="+inputStr);
return message;
}
Is the #Transformer annotation the proper way to link this bit of code with "spring.cloud.stream.bindings.input.group" from application.properties? Are there any other annotations necessary?
Here's my source:
private String format = "EEEEE dd MMMMM yyyy HH:mm:ss.SSSZ";
#Bean
#InboundChannelAdapter(value = Source.OUTPUT, poller = #Poller(fixedDelay = "1000", maxMessagesPerPoll = "1"))
public MessageSource<String> timerMessageSource() {
ApplicationLog log = new ApplicationLog(this, "timerMessageSource");
String message = new SimpleDateFormat(format).format(new Date());
log.info("SampleSource.timeMessageSource() message=["+message+"]");
return () -> new GenericMessage<>(new SimpleDateFormat(format).format(new Date()));
}
I'm confused about the "value = Source.OUTPUT". Does this mean my processor needs to be named differently?
Is the inclusion of #Poller causing me a problem somehow?
This is how I define the 2 processor streams (del-1 and del-2) in SCDF shell:
stream create del-1 --definition ":split > processor-that-does-everything-sleeps5 --spring.cloud.stream.bindings.applicationMetrics.destination=metrics > :merge"
stream create del-2 --definition ":split > processor-that-does-everything-sleeps5 --spring.cloud.stream.bindings.applicationMetrics.destination=metrics > :merge"
Do I need to do anything differently there?
All of this is running in Docker/K8s.
RabbitMQ is given by bitnami/rabbitmq:3.7.2-r1 and is configured with the following props:
RABBITMQ_USERNAME: user
RABBITMQ_PASSWORD <redacted>:
RABBITMQ_ERL_COOKIE <redacted>:
RABBITMQ_NODE_PORT_NUMBER: 5672
RABBITMQ_NODE_TYPE: stats
RABBITMQ_NODE_NAME: rabbit#localhost
RABBITMQ_CLUSTER_NODE_NAME:
RABBITMQ_DEFAULT_VHOST: /
RABBITMQ_MANAGER_PORT_NUMBER: 15672
RABBITMQ_DISK_FREE_LIMIT: "6GiB"
Are any other environment variables necessary?