Spring Integration + SpringBoot JUnit tries to connect to DB unexpectedly - spring-boot

Question

Please refer to system diagram attached.
system diagram here
ISSUE: When I try to post message to input channel, the code tries to connect to the DB and throws an exception that it is unable to connect.
Code inside 5 -> Read from a channel, apply Business Logic (empty for now) and send the response to another channel.
#Bean
public IntegrationFlow sendToBusinessLogictoNotifyExternalSystem() {
return IntegrationFlows
.from("CommonChannelName")
.handle("Business Logic Class name") // Business Logic empty for now
.channel("QueuetoAnotherSystem")
.get();
}
I have written the JUnit for 5 as given below,
#Autowired
PublishSubscribeChannel CommonChannelName;
#Autowired
MessageChannel QueuetoAnotherSystem;
#Test
public void sendToBusinessLogictoNotifyExternalSystem() {
Message<?> message = (Message<?>) MessageBuilder.withPayload("World")
.setHeader(MessageHeaders.REPLY_CHANNEL, QueuetoAnotherSystem).build();
this.CommonChannelName.send((org.springframework.messaging.Message<?>) message);
Message<?> receive = QueuetoAnotherSystem.receive(5000);
assertNotNull(receive);
assertEquals("World", receive.getPayload());
}
ISSUE: As you can see from the system diagram, my code also has a DB connection on a different flow.
When I try to post message to producer channel, the code tries to connect to the DB and throws an exception that it is unable to connect.
I do not want this to happen, because the JUnit should never be related to the DB, and should run anywhere, anytime.
How do I fix this exception?
NOTE: Not sure if it matters, the application is a Spring Boot application. I have used Spring Integration inside the code to read and write from/to queues.

Answer 1

Since the common channel is a publish/subscribe channel, the message goes to both flows.
If this is a follow-up to this question/answer, you can prevent the DB flow from being invoked by calling stop() on the sendToDb flow (as long as you set ignoreFailures to true on the pub/sub channel, like I suggested there.
((Lifecycle) sendToDb).stop();

Answer 2

JUNIT TEST CASE - UPDATED:
#Autowired
PublishSubscribeChannel CommonChannelName;
#Autowired
MessageChannel QueuetoAnotherSystem;
#Autowired
SendResponsetoDBConfig sendResponsetoDBConfig;
#Test
public void sendToBusinessLogictoNotifyExternalSystem() {
Lifecycle flowToDB = ((Lifecycle) sendResponsetoDBConfig.sendToDb());
flowToDB.stop();
Message<?> message = (Message<?>) MessageBuilder.withPayload("World")
.setHeader(MessageHeaders.REPLY_CHANNEL, QueuetoAnotherSystem).build();
this.CommonChannelName.send((org.springframework.messaging.Message<?>) message);
Message<?> receive = QueuetoAnotherSystem.receive(5000);
assertNotNull(receive);
assertEquals("World", receive.getPayload());
}
CODE FOR 4: The flow that handles message to DB
public class SendResponsetoDBConfig {
#Bean
public IntegrationFlow sendToDb() {
System.out.println("******************* Inside SendResponsetoDBConfig.sendToDb ***********");
return IntegrationFlows
.from("Common Channel Name")
.handle("DAO Impl to store into DB")
.get();
}
}
NOTE: ******************* Inside SendResponsetoDBConfig.sendToDb *********** never gets printed.