将elasticsearch索引块标记为空的Java请求

import org.elasticsearch.action.admin.indices.forcemerge.ForceMergeRequest;
import org.elasticsearch.action.admin.indices.forcemerge.ForceMergeResponse;
import org.elasticsearch.action.support.master.AcknowledgedResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.indices.GetIndexRequest;
import org.elasticsearch.client.indices.GetIndexResponse;

import java.io.IOException;
import java.util.Arrays;

public class Main {

    public static void main(String[] args) throws IOException {
        // 创建 RestHighLevelClient 实例
        RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost("localhost", 9200, "http")));

        // 设置要标记为空的索引名称
        String indexName = "your_index_name";

        // 检查索引是否存在
        GetIndexRequest getIndexRequest = new GetIndexRequest(indexName);
        GetIndexResponse getIndexResponse = client.indices().get(getIndexRequest, RequestOptions.DEFAULT);
        boolean indexExists = getIndexResponse.getIndices().length > 0;

        if (indexExists) {
            // 发送强制合并请求
            ForceMergeRequest forceMergeRequest = new ForceMergeRequest(indexName);
            forceMergeRequest.indicesOptions().expandWildcardsOpen();
            forceMergeRequest.indicesOptions().expandWildcardsClosed();
            forceMergeRequest.maxNumSegments(1);

            ForceMergeResponse forceMergeResponse = client.indices().forcemerge(forceMergeRequest, RequestOptions.DEFAULT);
            int totalSegmentsAfterMerge = forceMergeResponse.getTotalSegments();
            boolean successfulMerge = forceMergeResponse.getFailedShards() == 0;

            if (successfulMerge) {
                System.out.println("索引块标记为空并成功合并为一个段。");
                System.out.println("合并后的段数: " + totalSegmentsAfterMerge);
            } else {
                System.out.println("索引块标记为空但合并失败。");
            }
        } else {
            System.out.println("索引不存在。");
        }

        // 关闭客户端连接
        client.close();
    }
}