Elasticsearch與cassandra集成

Question

我正在使用cassandra作爲其存儲庫的jhipster項目。現在我也想將elasticsearch與同一個項目集成。但是得到的錯誤似乎是cassandra試圖讀@Document作爲它的註釋。

Caused by: org.springframework.data.cassandra.mapping.VerifierMappingExceptions: com.shoptell.backoffice.repository.dto.IndexedMergeProductInfoDTO: 
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.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:1633) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570) 
    ... 144 more 

IndexedMergeProductInfoDTO.java

import org.springframework.data.annotation.Id; 
import org.springframework.data.elasticsearch.annotations.Document; 

@Document(indexName="mergeIndex",type="indexMergeProductInfo") 
public class IndexedMergeProductInfoDTO { 
    @Id 
    private String id; 
    private String name; 
    private String metaCategory; 
    private String categoryName; 
    private String subCategoryName; 
    private String productBrand; 
    private String productSubBrand; 
    private String series; 
    private String model; 

CassandraDataAutoConfiguration.java

import com.datastax.driver.core.Cluster; 
import org.springframework.beans.factory.BeanFactory; 
import org.springframework.boot.autoconfigure.AutoConfigurationPackages; 
import org.springframework.boot.autoconfigure.AutoConfigureAfter; 
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass; 
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean; 
import org.springframework.boot.context.properties.EnableConfigurationProperties; 
import org.springframework.context.annotation.Bean; 
import org.springframework.context.annotation.Configuration; 
import org.springframework.data.cassandra.config.CassandraEntityClassScanner; 
import org.springframework.data.cassandra.config.CassandraSessionFactoryBean; 
import org.springframework.data.cassandra.convert.CassandraConverter; 
import org.springframework.data.cassandra.convert.MappingCassandraConverter; 
import org.springframework.data.cassandra.core.CassandraAdminOperations; 
import org.springframework.data.cassandra.core.CassandraAdminTemplate; 
import org.springframework.data.cassandra.mapping.BasicCassandraMappingContext; 
import org.springframework.data.cassandra.mapping.CassandraMappingContext; 

import javax.inject.Inject; 

/** 
* {@link org.springframework.boot.autoconfigure.EnableAutoConfiguration Auto-configuration} for Spring Data's Cassandra support. 
* <p/> 
* Registers a {@link org.springframework.data.cassandra.config.CassandraSessionFactoryBean} a {@link org.springframework.data.cassandra.core.CassandraAdminOperations} a {@link org.springframework.data.cassandra.mapping.CassandraMappingContext} and a 
* {@link org.springframework.data.cassandra.convert.CassandraConverter} beans if no other beans of the same type are configured. 
* <p/> 
*/ 
@Configuration 
@ConditionalOnClass({Cluster.class, CassandraAdminOperations.class}) 
@EnableConfigurationProperties(CassandraProperties.class) 
@AutoConfigureAfter(CassandraAutoConfiguration.class) 
public class CassandraDataAutoConfiguration { 

    @Inject 
    BeanFactory beanFactory; 

    @Inject 
    private CassandraProperties properties; 

    @Inject 
    private Cluster cluster; 

    @Bean 
    @ConditionalOnMissingBean 
    public CassandraSessionFactoryBean session() throws Exception { 
     CassandraSessionFactoryBean session = new CassandraSessionFactoryBean(); 
     session.setCluster(this.cluster); 
     session.setConverter(cassandraConverter()); 
     session.setKeyspaceName(properties.getKeyspaceName()); 
     return session; 
    } 

    @Bean 
    @ConditionalOnMissingBean 
    public CassandraAdminOperations cassandraTemplate() throws Exception { 
     return new CassandraAdminTemplate(session().getObject(), cassandraConverter()); 
    } 

    @Bean 
    @ConditionalOnMissingBean 
    public CassandraMappingContext cassandraMapping() throws ClassNotFoundException { 
     BasicCassandraMappingContext bean = new BasicCassandraMappingContext(); 
     bean.setInitialEntitySet(CassandraEntityClassScanner.scan(AutoConfigurationPackages.get(beanFactory))); 
     bean.setBeanClassLoader(beanFactory.getClass().getClassLoader()); 
     return bean; 
    } 

    @Bean 
    @ConditionalOnMissingBean 
    public CassandraConverter cassandraConverter() throws Exception { 
     return new MappingCassandraConverter(cassandraMapping()); 
    } 
} 

什麼事情需要做，以獲得elasticsearch運行？

Answer 1

JHipster可以生成一個Cassandra + Elasticsearch項目 - >從我的理解中，您在生成項目時沒有選擇該選項，但是如果您想添加Elasticsearch，只需查看我們如何在新項目上執行此操作。

您也重新生成您的項目，並添加您的.yo-rc.json文件：

"searchEngine": "elasticsearch"