相关疑难解决方法(0)

我正在开发一个项目,我们想要使用LocalDateTime类型的字段持有一个实体,我们知道cassandra没有对这种类型转换的本机支持,我们使用Spring对转换器的支持创建了我们自己的自定义转换器,然而,似乎Spring-Data-Cassandra无法识别它们或者理解该字段应该映射到列.

这就是我们用Spring的转换服务注册转换器的方式.

<bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
        <property name="converters">
            <set>
                <!-- list of converters-->
                <bean class="com.klappo.userservice.api.persistence.converters.DateToLocalDateTimeConverter" />
                <bean class="com.klappo.userservice.api.persistence.converters.LocalDateTimeToDateConverter" />
                <bean class="com.klappo.userservice.api.persistence.converters.DateToLocalDateConverter" />
                <bean class="com.klappo.userservice.api.persistence.converters.LocalDateToDateConverter" />
            </set>
        </property>
    </bean>

最终结果是在我们的应用程序启动时抛出以下异常:

    Caused by: 
org.springframework.data.cassandra.mapping.VerifierMappingExceptions: java.time.LocalDate:|Cassandra entities must have the @Table, @Persistent or @PrimaryKeyClass Annotation|
    at org.springframework.data.cassandra.mapping.BasicCassandraPersistentEntityMetadataVerifier.verify(BasicCassandraPersistentEntityMetadataVerifier.java:45)
    at org.springframework.data.cassandra.mapping.BasicCassandraPersistentEntity.verify(BasicCassandraPersistentEntity.java:198)
    at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:297)
    at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.createAndRegisterProperty(AbstractMappingContext.java:469)
    at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.doWith(AbstractMappingContext.java:426)
    at org.springframework.util.ReflectionUtils.doWithFields(ReflectionUtils.java:607)
    at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:294)
    at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.createAndRegisterProperty(AbstractMappingContext.java:469)
    at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.doWith(AbstractMappingContext.java:426)
    at org.springframework.util.ReflectionUtils.doWithFields(ReflectionUtils.java:607)
    at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:294)
    at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:256)
    at org.springframework.data.mapping.context.AbstractMappingContext.initialize(AbstractMappingContext.java:372)
    at org.springframework.data.cassandra.mapping.BasicCassandraMappingContext.initialize(BasicCassandraMappingContext.java:79)
    at org.springframework.data.mapping.context.AbstractMappingContext.afterPropertiesSet(AbstractMappingContext.java:362)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1612)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1549)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at …