0x0 背景

在項(xiàng)目中用到了Spring Data ElasticSearch，最近更新到了最新版本5.0.x，在數(shù)據(jù)插入、修改、刪除后，緊接著進(jìn)行查詢發(fā)現(xiàn)數(shù)據(jù)并未更新；

0x1 解決方法

研究后發(fā)現(xiàn)是新版本的spring data es默認(rèn)的刷新策略是null，代碼如下：

        @Bean
        @ConditionalOnMissingBean(value = ElasticsearchOperations.class, name = "elasticsearchTemplate")
        @ConditionalOnBean(ElasticsearchClient.class)
        ElasticsearchTemplate elasticsearchTemplate(ElasticsearchClient client, ElasticsearchConverter converter) {
            return new ElasticsearchTemplate(client, converter);
        }

這里沒有給ElasticsearchTemplate設(shè)置refreshPolicy屬性，點(diǎn)進(jìn)AbstractElasticsearchTemplate可以看到默認(rèn)為null，而以前默認(rèn)是立即刷新IMMEDIATE。

查看Spring官網(wǎng)發(fā)現(xiàn)

Refresh configuration

When configuring Spring Data Elasticsearch like described in Elasticsearch Clients by using ElasticsearchConfigurationSupport, AbstractElasticsearchConfiguration or AbstractReactiveElasticsearchConfiguration the refresh policy will be initialized to null. Previously the reactive code initialized this to IMMEDIATE, now reactive and non-reactive code show the same behaviour.

也就是說，對(duì)es數(shù)據(jù)庫進(jìn)行數(shù)據(jù)變更操作時(shí)，默認(rèn)是按照索引自帶的刷新策略（一般情況下是1s以后才會(huì)更新索引）

{
  "settings": {},
  "defaults": {
    "index": {
      "refresh_interval": "1s"
    }
  }
}

如果想要在Spring data es中更新數(shù)據(jù)后立即刷新，那么需要如下配置覆蓋掉Springboot的Auto Configuration：

@Configuration
@EnableConfigurationProperties(ElasticsearchProperties.class)
public class ElasticsearchConfig extends ElasticsearchConfiguration {

    private final ElasticsearchProperties properties;

    public ElasticsearchConfig(ElasticsearchProperties properties) {
        this.properties = properties;
    }

    @NotNull
    @Override
    public ClientConfiguration clientConfiguration() {
        List<String> uris = properties.getUris();
        String[] uri = uris.toArray(new String[0]);
        return ClientConfiguration.builder()
                .connectedTo(uri)
                .withSocketTimeout(properties.getSocketTimeout())
                .withConnectTimeout(properties.getConnectionTimeout())
                .build();
    }

    @NotNull
    @Bean(name = { "elasticsearchOperations", "elasticsearchTemplate" })
    @Override
    public ElasticsearchOperations elasticsearchOperations(@NotNull ElasticsearchConverter elasticsearchConverter,
                                                           @NotNull ElasticsearchClient elasticsearchClient) {
        ElasticsearchTemplate template = new ElasticsearchTemplate(elasticsearchClient, elasticsearchConverter);
        template.setRefreshPolicy(RefreshPolicy.IMMEDIATE);
        return template;
    }

}