java - EL1057E : No bean resolver registered in the context to resolve access to bean

Question

我一直在尝试用多个索引编写有关 Elasticsearch 的文章。目前我已经安装了 Spring v5.2.3.RELEASE 和 Spring Boot v2.2.4.RELEASE。

我发现了几种允许使用 Spring 的 SPEL 技术使用多个索引的解决方案，但我无法使其工作。

我目前有这些文件:

ElasticDBDbConfig.java

package edu.unifi.disit.datamanager.config;
@Configuration
@EnableTransactionManagement
@EnableElasticsearchRepositories(basePackages = { "edu.unifi.disit.datamanager.datamodel.elasticdb"})
public class ElasticDBDbConfig {

   @Value("${elasticsearch.protocol}")
   private String esProtocol;

   @Value("${elasticsearch.host}")
   private String esHost;

   @Value("${elasticsearch.port}")
   private int esPort;

   @Value("${elasticsearch.clustername}")
   private String esClusterName;

   @Bean(destroyMethod = "close")
     public RestHighLevelClient elasticsearchClient() { 
        return new RestHighLevelClient(RestClient.builder(new HttpHost(esHost,esPort,esProtocol)));
    }

@Bean
public ElasticsearchRestTemplate elasticsearchTemplate() {
    ElasticsearchRestTemplate elasticsearchTemplate = new 
    ElasticsearchRestTemplate(elasticsearchClient());

    elasticsearchTemplate.putMapping(KPIElasticValue.class);

    return elasticsearchTemplate;
}

ConfigIndexBean.java

package edu.unifi.disit.datamanager.config;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;

@Configuration
@Component("configIndexBean")
public class ConfigIndexBean {

@Value("${elasticsearch.dummyIndex}")
private String indexName;

public String getIndexName() {
    return indexName;
}

public void setIndexName(String indexName) {
    this.indexName = indexName;
}

}

KPIElasticValue.java

package edu.unifi.disit.datamanager.datamodel.elasticdb;

@JsonInclude(JsonInclude.Include.NON_NULL)
@Entity
@JsonSerialize(using = KPIElasticValueSerializer.class)
@JsonDeserialize(using = KPIElasticValueDeserializer.class)
@ComponentScan(basePackages = "edu.unifi.disit.datamanager.config")
@Document(type = "_doc", indexName = "#{@configIndexBean.getIndexName()}")
public class KPIElasticValue {

你有什么想法吗？

我也试试

@Document(type = "_doc", indexName = "#{configIndexBean.getIndexName()}")
@Document(type = "_doc", indexName = "#{configIndexBean.indexName}")

异常(exception)情况是:

EL1057E:上下文中没有注册任何 Bean 解析器来解析对 Bean“configIndexBean”的访问

Answer 1

我是这样解决的:

ConfigIndexBean.java

package edu.unifi.disit.datamanager.config;

public class ConfigIndexBean {

    private static String indexName = "dummy";

    public static final String getIndexName() {
        return indexName;
    }

    public static void setIndexName(String indexName) {
        ConfigIndexBean.indexName = indexName;
    }

}

以及 KPIElasticValue.java 上的注释:

@Document(type = "_doc",indexName = "# 
{T(edu.unifi.disit.datamanager.config.ConfigIndexBean).getIndexName()}")

在服务中，在调用存储库之前，我会像这样更改索引:

ConfigIndexBean.setIndexName("newindex");