title: Creating Indices name Dynamically in Elasticsearch using Spring-Data Elasticsearch
body: <p>I have a use case where in need to create the indices per month in Elasticsearch. The idea is to create indices on the monthly bases so that they are easy to maintain and can be deleted when expired.For this to achieve i have used the spring-batch and have a monthly job which will create the indices on monthly bases For Elasticsearch-Java integration I have used the Spring-Data Elasticsearch implementation. The problem which i am facing now is, I am not able to figure out how to provide the dynamic-name to the index and mapping using the Entity object. My Current implementation is done keeping the Single Index in mind. Please find the below code which i am using to create indices</p>
  
  <pre><code>elasticsearchTemplate.createIndex(SingleChat.class);
  elasticsearchTemplate.putMapping(SingleChat.class);
  elasticsearchTemplate.refresh(SingleChat.class, true);
  </code></pre>
  
  <p>And SingleChat is my Entity Class</p>
  
  <pre><code>@Document(indexName="singlemsgtemp_#{jobParameters['MONTH']}",type="singlechat")
  public class SingleChat {
      @org.springframework.data.annotation.Id
      String Id;
      @Field(type = FieldType.String)
      String conservationId;
      @Field(type = FieldType.String)
      String from;
      @Field(type = FieldType.String)
      String to;
      @Field(type = FieldType.String)
      String msgContent; 
      @Field(type = FieldType.String)
      String sessionId;
      @Field(type = FieldType.Date, index = FieldIndex.not_analyzed, store = true, format = DateFormat.date_hour_minute_second_millis)
      Date postedDate;
      @Field(type = FieldType.Date, index = FieldIndex.not_analyzed, store = true, format = DateFormat.date_hour_minute_second_millis)
      Date expireDate;
  }   
  </code></pre>
  
  <p>But this is not working as expected. I am trying out some other things also. But i am open for suggestion. Also feel free to comment on my current approach, will it work or not. Please let me know if any more details are required.</p>