要解决Axon聚合标识类型转换器的问题,可以按照以下步骤进行操作:
org.axonframework.common.property.Property
接口。例如,我们可以创建一个名为MyAggregateIdentifierConverter
的类:import org.axonframework.common.property.Property;
public class MyAggregateIdentifierConverter implements Property {
@Override
public String getValue(MyAggregateIdentifier myAggregateIdentifier) {
return myAggregateIdentifier.toString();
}
@Override
public Class expectedSourceType() {
return String.class;
}
@Override
public Class targetType() {
return MyAggregateIdentifier.class;
}
}
@Converter
注解,指定自定义的聚合标识类型转换器类。例如,我们可以创建一个名为MyAggregate
的聚合根类,并在标识字段上使用@Converter
注解:import org.axonframework.commandhandling.CommandHandler;
import org.axonframework.eventsourcing.EventSourcingHandler;
import org.axonframework.modelling.command.AggregateIdentifier;
import org.axonframework.modelling.command.AggregateLifecycle;
import org.axonframework.modelling.command.TargetAggregateIdentifier;
import org.axonframework.spring.stereotype.Aggregate;
@Aggregate
public class MyAggregate {
@AggregateIdentifier
@Converter(converterType = MyAggregateIdentifierConverter.class)
private MyAggregateIdentifier id;
// CommandHandler and EventSourcingHandler methods omitted for brevity
}
AxonConfig
的Axon配置类,并在其中注册自定义的聚合标识类型转换器:import org.axonframework.common.property.Property;
import org.axonframework.config.Configurer;
import org.axonframework.config.DefaultConfigurer;
import org.axonframework.serialization.Serializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class AxonConfig {
@Bean
public Configurer axonConfigurer(Serializer serializer) {
return DefaultConfigurer.defaultConfiguration()
.configureAggregate(MyAggregate.class)
.registerComponent(Property.class, MyAggregateIdentifierConverter.class)
.configureSerializer(c -> serializer)
.buildConfiguration();
}
}
通过以上步骤,我们可以成功创建一个自定义的聚合标识类型转换器,并将其应用于Axon聚合根类中的标识字段。这样,Axon将使用自定义的转换器将聚合标识类型转换为所需的类型,从而解决类型转换问题。