spring-data-mongo | Spring Data MongoDB examples | Pub Sub library

I am using Spring Boot webflux and spring data reactive mongodb. I have a user class annotated with @Document and it implements UserDetails. The problem is that i have a username field with @Indexed(unique = true). When the applications starts up it throws the error below even thought the index gets created on the database.

Here are the classes:

I am using Spring Data MongoDB and I have this simple repository:

I'm using the following pom in my spring boot app:

My stream setup is http source -> mongodb sink. When I send test message (JSON) from http source, getting below error in mongodb sink.

An error occurred in message handler [bean 'mongoConsumerMessageHandler'; defined in: 'org.springframework.cloud.fn.consumer.mongo.MongoDbConsumerConfiguration'; from source: 'org.springframework.core.type.StandardMethodMetadata@1b11ef33'] on message [GenericMessage [payload=byte[24], headers={amqp_receivedDeliveryMode=PERSISTENT, content-length=24, amqp_receivedExchange=http-rabbit-stream-http-source, amqp_deliveryTag=1, amqp_redelivered=false, b3=a080d23cbf78b659-65e9906748c2b-1, host=http-src-http-source-v1.dt-u2.cf.test.net, connection=close, id=7fac727a-de9a-aea95-92c574a246d1, cache-control=no-cache, sourceData=(Body:' {"hello": "world !!"} ... 15:38:39.818: [APP/PROC/WEB.0] org.springframework.data.mapping.MappingException: Couldn't find PersistentEntity for type class [B! 15:38:39.818: [APP/PROC/WEB.0] at org.springframework.data.mapping.context.MappingContext.getRequiredPersistentEntity(MappingContext.java:79) ~[spring-data-commons-2.3.7.RELEASE.jar:2.3.7.RELEASE] 15:38:39.818: [APP/PROC/WEB.0] at org.springframework.data.mongodb.core.EntityOperations$AdaptibleMappedEntity.of(EntityOperations.java:652) ~[spring-data-mongodb-3.0.7.RELEASE.jar:3.0.7.RELEASE] 15:38:39.818: [APP/PROC/WEB.0] at org.springframework.data.mongodb.core.EntityOperations$AdaptibleMappedEntity.access$100(EntityOperations.java:632) ~[spring-data-mongodb-3.0.7.RELEASE.jar:3.0.7.RELEASE] 15:38:39.818: [APP/PROC/WEB.0] at org.springframework.data.mongodb.core.EntityOperations.forEntity(EntityOperations.java:108) ~[spring-data-mongodb-3.0.7.RELEASE.jar:3.0.7.RELEASE]

How can I setup the context provider to make my SpEL extension available in a @Query("...")?

We use r2dbc with postgres.

From what I understand I would need to register my extension with a ReactiveExtensionAwareQueryMethodEvaluationContextProvider but I cannot find any documentation on how to do this. Is there a specific bean or @Configuration to use for it?

I found this unit test. It is monogo instead of r2dbc, but I think it's the same principle - however because it is a unit test it does not show how to setup the context in my normal code.

Trying to implement it like this does not provide the my() method in the SpEL

I want to connect a Spring Boot REST Api project to a MongoDb via aplication.properties file. Why? Because it seems easier to me.

I know how to do this connection with a MySQL db. I have downloaded MongoDb Compass GUI.

application.properties file

Code:

I try to setup a Mongo DB in Spring Boot project. I've set an uri in application.yml:

I am getting build errors in my Eclipse project like the following: