Troubles to create a Bean of EventStorageEngine with MongoEventStorageEngine due to conflict between Axon FW and new Mongo API

I’ve already asked about it at StackOverflow

I’m beginner, I’m just starting to learn about CQRS and Axon FW, so may be my question is not accurate or I’m asking really basic question, sorry.

Following that tutorial I’m creating a Bean for EventStorageEngine as follows:

import com.mongodb.MongoClient;
import org.axonframework.eventsourcing.eventstore.EventStorageEngine;
import org.axonframework.extensions.mongo.DefaultMongoTemplate;
import org.axonframework.extensions.mongo.eventsourcing.eventstore.MongoEventStorageEngine;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class AxonConfig {
        @Bean
        public EventStorageEngine storageEngine(MongoClient client) {
            return MongoEventStorageEngine
                    .builder()
                    .mongoTemplate(DefaultMongoTemplate
                            .builder()
                            .mongoDatabase(client)
                            .build())
                    .build();
        }

}

However, this is not working for me, the IDE warns that it cannot autowire MongoClient, no MongoClient Beans are found, and here:

.mongoDatabase(mongoClient)

The IDE suggests me to cast com.mongodb.MongoClient to com.mongodb.client.MongoClient

.mongoDatabase((com.mongodb.client.MongoClient) mongoClient)

But if I try to change that AxonConfig to use com.mongodb.client.MongoClient instead, as follows:

@Configuration
public class AxonConfig {

    @Bean
    public EventStorageEngine storageEngine(com.mongodb.client.MongoClient mongoClient) {
        return MongoEventStorageEngine
                .builder()
                .mongoTemplate(DefaultMongoTemplate
                        .builder()
                        .mongoDatabase(mongoClient)
                        .build())
                .build();
    }
}

then it can autowire MongoClient and compile successfully, but when I launch the application it fails and I’m getting this output:

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'storageEngine' defined in class path resource [com/placidmasvidal/cqrsandeventsourcing/command/AxonConfig.class]: Unsatisfied dependency expressed through method 'storageEngine' parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mongo' defined in class path resource [org/springframework/boot/autoconfigure/mongo/MongoAutoConfiguration.class]: Unsatisfied dependency expressed through method 'mongo' parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoClientSettings' defined in class path resource [org/springframework/boot/autoconfigure/mongo/MongoAutoConfiguration$MongoClientSettingsConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.mongodb.MongoClientSettings]: Factory method 'mongoClientSettings' threw exception; nested exception is java.lang.NoSuchFieldError: DEFAULT_BSON_TYPE_CLASS_MAP
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:541) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1334) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:944) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:917) ~[spring-context-5.3.4.jar:5.3.4]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:582) ~[spring-context-5.3.4.jar:5.3.4]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144) ~[spring-boot-2.4.3.jar:2.4.3]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767) ~[spring-boot-2.4.3.jar:2.4.3]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) ~[spring-boot-2.4.3.jar:2.4.3]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426) ~[spring-boot-2.4.3.jar:2.4.3]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:326) ~[spring-boot-2.4.3.jar:2.4.3]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1311) ~[spring-boot-2.4.3.jar:2.4.3]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1300) ~[spring-boot-2.4.3.jar:2.4.3]
    at com.placidmasvidal.cqrsandeventsourcing.command.CommandApplication.main(CommandApplication.java:10) ~[main/:na]
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mongo' defined in class path resource [org/springframework/boot/autoconfigure/mongo/MongoAutoConfiguration.class]: Unsatisfied dependency expressed through method 'mongo' parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoClientSettings' defined in class path resource [org/springframework/boot/autoconfigure/mongo/MongoAutoConfiguration$MongoClientSettingsConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.mongodb.MongoClientSettings]: Factory method 'mongoClientSettings' threw exception; nested exception is java.lang.NoSuchFieldError: DEFAULT_BSON_TYPE_CLASS_MAP
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:541) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1334) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1380) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.4.jar:5.3.4]
    ... 20 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoClientSettings' defined in class path resource [org/springframework/boot/autoconfigure/mongo/MongoAutoConfiguration$MongoClientSettingsConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.mongodb.MongoClientSettings]: Factory method 'mongoClientSettings' threw exception; nested exception is java.lang.NoSuchFieldError: DEFAULT_BSON_TYPE_CLASS_MAP
    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:658) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:486) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1334) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1380) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.4.jar:5.3.4]
    ... 34 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.mongodb.MongoClientSettings]: Factory method 'mongoClientSettings' threw exception; nested exception is java.lang.NoSuchFieldError: DEFAULT_BSON_TYPE_CLASS_MAP
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.3.4.jar:5.3.4]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653) ~[spring-beans-5.3.4.jar:5.3.4]
    ... 48 common frames omitted
Caused by: java.lang.NoSuchFieldError: DEFAULT_BSON_TYPE_CLASS_MAP
    at org.bson.codecs.MapCodecProvider.<init>(MapCodecProvider.java:61) ~[bson-4.1.1.jar:na]
    at com.mongodb.MongoClientSettings.<clinit>(MongoClientSettings.java:60) ~[mongodb-driver-core-4.1.1.jar:na]
    at org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration$MongoClientSettingsConfiguration.mongoClientSettings(MongoAutoConfiguration.java:64) ~[spring-boot-autoconfigure-2.4.3.jar:2.4.3]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.3.4.jar:5.3.4]
    ... 49 common frames omitted

Those are the versions of Axon FW and Extensions and Mongo that I’m using:
implementation group: ‘org.springframework.boot’, name: ‘spring-boot-starter-data-mongodb’, version: ‘2.1.9.RELEASE’
implementation group: ‘org.axonframework’, name: ‘axon-spring-boot-starter’, version: ‘4.2’ implementation group: ‘org.axonframework’, name: ‘axon’, version: ‘4.2’, ext: ‘pom’
implementation group: ‘org.axonframework.extensions.mongo’, name: ‘axon-mongo’, version: ‘4.2’

How can I implement a Bean of MongoEventStorageEngine for axon for the new MongoClient API or some other code to do the job of store each event in sepparate mongodb Document?

Thank you very much.

Hey @placidmasvidal I didn’t check the StackOverFlow question yet, but maybe I can share my config and it may work for you using the spring black magic :slight_smile:

First I am auto wiring MongoTemplate

@Autowired private MongoTemplate mongoTemplate;

Then, configuring using the event store engine builder like you:

@Bean
  public EventStorageEngine storageEngine(EventUpcasterChain upcasterChain) {
    return MongoEventStorageEngine.builder()
        .eventSerializer(eventSerializer())
        .snapshotSerializer(eventSerializer())
        .mongoTemplate(mongoTemplate)
        .upcasterChain(upcasterChain)
        .storageStrategy(new DocumentPerEventStorageStrategy())
        .build();

My versions are:

Axon 4.3.3
Axon Mongo 4.3
Springboot 2.1.9
Springdata-mongodb 2.1.11 (automatic from parent)
MongoDB server 4.0.23