日志系统升级之路（.Net客户端的使用）
一、客户端
由于我们的Framework版本基于4.5，所以选取了 NEST 和 Elasticsearch.Net 的版本最高只能选择 6.1.0
二、ES客户端封装
代码比较简单，不再赘述
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Elasticsearch.Net;
using Nest;
using GFK.Common.Extends;
using GFK.Common.Consts;
namespace GFK.Elasticsearch
{
/// <summary>
///
/// </summary>
public class ESClient
{
/// <summary>
///
/// </summary>
public ElasticClient esClient = null;
/// <summary>
/// 创建ES客户端实例
/// </summary>
/// <param name="hostNames">ES服务域名，支持集群</param>
public ESClient(List<string> hostNames)
{
if (!hostNames.HasValue())
{
throw new ArgumentNullException("hostNames 至少需要传入一个ES服务");
}
var uris = new List<Uri>();
foreach (var host in hostNames)
{
var uri = new Uri(host);
uris.Add(uri);
}
var connectionPool = new SniffingConnectionPool(uris);
var settings = new ConnectionSettings(connectionPool);
esClient = new ElasticClient(settings);
}
/// <summary>
/// 索引文档
/// </summary>
/// <typeparam name="T">实体类型</typeparam>
/// <param name="item">实体</param>
/// <param name="isSuffix">索引名是否添加日期后缀</param>
/// <returns></returns>
public IIndexResponse CreateIndex<T>(T item, bool isSuffix = false) where T : class
{
if (esClient == null)
{
throw new Exception("ES 初始化异常，客户端实例为空");
}
var index = item.GetAttribute<ESIndexNameAttribute>();
if (index == null || index.IndexName.IsNullOrWhiteSpace())
{
throw new ArgumentException("item 必须使用 ElasticsearchIndexAttribute 指定索引名");
}
var indexName = index.IndexName;
if (!indexName.IsNullOrWhiteSpace() && isSuffix)
{
indexName = string.Format("{0}-{1}", indexName, DateTime.Now.ToString(DateTimeTypeConst.DATE));
}
//索引不存在的时候自动创建
return esClient.Index(item, p => p.Index(indexName));
}
}
}三、ES客户端的使用
日志模型如下：
using GFK.Common.Consts;
using Nest;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace G.Demo
{
[GFK.Elasticsearch.ESIndexName("log")]
[ElasticsearchType(Name = "_doc", IdProperty = "id")]
public class Log
{
[Keyword(Name = "id")]
public string Id { get; set; } = Guid.NewGuid().ToString("N");
/// <summary>
/// 系统代码
/// </summary>
[Keyword(Name = "system_code")]
public string SystemCode { get; set; }
/// <summary>
/// 系统模块
/// </summary>
[Keyword(Name = "source")]
public string Source { get; set; }
/// <summary>
/// 所在机器名
/// </summary>
[Text(Name = "machine_name")]
public string MachineName
{
get
{
return System.Environment.MachineName;
}
}
/// <summary>
/// 应用程序域名称
/// </summary>
[Text(Name = "appdomain_name")]
public string AppdomainName
{
get
{
return AppDomain.CurrentDomain.SetupInformation.ApplicationBase;
}
}
/// <summary>
/// 文档信息
/// </summary>
[Text(Name = "message")]
public string Message { get; set; }
/// <summary>
/// 文档创建时间
/// </summary>
[Date(Name = "created_time")]
public DateTime CreatedTime { get; set; } = DateTime.Now;
}
}使用代码比较简单，不再赘述
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using GFK.Common;
using GFK.Elasticsearch;
using GFK.Common.Extends;
namespace G.Demo
{
class Program
{
static void Main(string[] args)
{
var client = new ESClient(new List<string>() { "http://192.168.17.130:9200" });
for (int i = 0; i < 5; i++)
{
var log = new Log()
{
Message = "让我测试测试" + i,
Source = "Program.Main",
SystemCode = "G.Demo"
};
var rst = client.CreateIndex<Log>(log, true);
if (rst.Result == Nest.Result.Created)
{
Console.WriteLine("第{0}个文档索引成功", i);
}
else
{
Console.WriteLine("第{0}个索引失败，文档内容为：{1}", i, log.ToJson());
}
}
Console.Read();
}
}
}运行后出现下图，即表示索引文档成功。
