Elasticsearch Java API 的使用（9）— Bluk的批量原理 & Bulk大数据量的批量上传示例「建议收藏」

Elasticsearch对多个文档进行索引的简便方法。Bulk api的支持可以实现一次请求执行批量的添加、删除、更新等操作。Bulk操作使用的是UDP协议，UDP无法确保与ElasticSearch服务器通信时不丢失数据。
将数据累计到一定数量进行批量上传，大大加快数据上传速度。

下面代码中，在 “具体操作添加到批量请求中” 前可以是新增、删除、更新等操作。

public class Bulk implements WriteRequest{ 
   

    public static void main(String[] args) { 
   
        String globalname = "";
        String valuep = "";
        String time = "";
        //数据条数记步
        int count = 0;
        //数据上传条数设定
        int BULK_SIZE = 100;
        try{ 
   
            /*创建客户端*/
            //client startup
            //设置集群名称
            Settings settings = Settings.builder()
                    .put("cluster.name", "elsearch")
                    .put("client.transport.sniff", true)
                    .build();
            //创建client
            TransportClient client = new 
                    PreBuiltTransportClient(settings)
                    .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("10.122.4.79"),9300));

            for(int i = 0; i<10; i++){ 
   
                BulkRequestBuilder bulkRequest = client.prepareBulk();
                bulkRequest.setRefreshPolicy(RefreshPolicy.IMMEDIATE);
                XContentBuilder builder=XContentFactory.jsonBuilder()
                                    .startObject();
                //TODO: 设置属性和值
                builder.field("pointid",globalname);
                builder.field("pointvalue",valuep);
                builder.field("inputtime",new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(time));
                builder.endObject();
                
                // 添加索引数据 
                IndexRequestBuilder requestBuilder = client
                        .prepareIndex("pointdata", "pointdata")
                        .setSource(builder);
                
                // 具体操作添加到批量请求中
                bulkRequest.add(requestBuilder);
                count++;
                if(count % BULK_SIZE == 0){ 
   
                    BulkResponse bulkResponse = bulkRequest
                            .execute().actionGet();
                    if (bulkResponse.hasFailures()) { 
   
                        // LOGGER.error("导入索引数据失败: "+"pointdata");
                        // LOGGER.error("导入索引数据失败: "+bulkResponse.buildFailureMessage());
                        System.out.println("导入索引数据失败");
                    }

                    bulkRequest = client.prepareBulk();
                    bulkRequest.setRefreshPolicy(RefreshPolicy.IMMEDIATE);
                    count = 0;
                }
            }
        }catch(Exception e){ 
   
            e.printStackTrace();
        }


    }

    @Override
    public void readFrom(StreamInput arg0) throws IOException { 
   
        // TODO Auto-generated method stub

    }

    @Override
    public void writeTo(StreamOutput arg0) throws IOException { 
   
        // TODO Auto-generated method stub

    }

    @Override
    public RefreshPolicy getRefreshPolicy() { 
   
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public WriteRequest setRefreshPolicy(RefreshPolicy arg0) { 
   
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public ActionRequestValidationException validate() { 
   
        // TODO Auto-generated method stub
        return null;
    }

}

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