ASP.NET实现Hadoop增删改查的示例代码

网络编程 2024/11/16 佚名

3 2 1

无为清净楼资源网 Design By www.qnjia.com

本文介绍了ASP.NET实现Hadoop增删改查的示例代码，分享给大家，具体如下：

packages.config

<"1.0" encoding="utf-8""Microsoft.AspNet.WebApi.Client" version="4.0.20505.0" targetFramework="net46" />
 <package id="Microsoft.Data.Edm" version="5.2.0" targetFramework="net46" />
 <package id="Microsoft.Data.OData" version="5.2.0" targetFramework="net46" />
 <package id="Microsoft.Hadoop.WebClient" version="0.12.5126.42915" targetFramework="net46" />
 <package id="Microsoft.Net.Http" version="2.0.20505.0" targetFramework="net46" />
 <package id="Microsoft.WindowsAzure.ConfigurationManager" version="1.8.0.0" targetFramework="net46" />
 <package id="Newtonsoft.Json" version="4.5.11" targetFramework="net46" />
 <package id="System.Spatial" version="5.2.0" targetFramework="net46" />
 <package id="WindowsAzure.Storage" version="2.0.4.1" targetFramework="net46" />
</packages>

HDFSAccess.cs

using Microsoft.Hadoop.WebHDFS;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;

namespace Physical
{
  public sealed class HDFSAccess
  {
    private readonly WebHDFSClient webHDFSClient;

    public HDFSAccess(string uriString, string userName)
    {
      this.webHDFSClient = new WebHDFSClient(new Uri(uriString), userName);
    }

    public List<string> GetDirectories(string path)
    {
      var directoryStatus = this.webHDFSClient.GetDirectoryStatus(path).Result;

      return directoryStatus.Directories.Select(d => d.PathSuffix).ToList();
    }

    public List<string> GetFiles(string path)
    {
      var directoryStatus = this.webHDFSClient.GetDirectoryStatus(path).Result;

      return directoryStatus.Files.Select(d => d.PathSuffix).ToList();
    }

    public bool CreateDirectory(string path)
    {
      // 传入路径不包含根目录时，预设会在根目录「/」底下
      return this.webHDFSClient.CreateDirectory(path).Result;
    }

    public bool DeleteDirectory(string path)
    {
      // 传入路径不包含根目录时，预设会在根目录「/」底下
      return this.webHDFSClient.DeleteDirectory(path).Result;
    }

    public string CreateFile(string localFile, string remotePath)
    {
      // 传入远端路径不包含根目录时，预设会在根目录「/」底下
      return this.webHDFSClient.CreateFile(localFile, remotePath).Result;
    }

    public bool DeleteFile(string path)
    {
      // 传入路径不包含根目录时，预设会在根目录「/」底下
      return this.webHDFSClient.DeleteDirectory(path).Result;
    }

    public HttpResponseMessage OpenFile(string path)
    {
      // 传入路径不包含根目录时，预设会在根目录「/」底下
      return this.webHDFSClient.OpenFile(path).Result;
    }
  }
}

Program.cs

using Physical;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MyTest
{
  class Program
  {
    // HDFS cluster 客户端进入端点设定于 主机上
    // 预设端点：http://[主机名称]:50070
    // 预设帐号：Wu
    private static HDFSAccess access = new HDFSAccess(@"http://127.0.0.1:50070", "Wu");

    static void Main(string[] args)
    {
      GetDirectoriesTest();
      Console.WriteLine("----------------------------------------------");
      GetFilesTest();
      Console.WriteLine("----------------------------------------------");
      DirectoryTest();
      Console.WriteLine("----------------------------------------------");
      FileTest();
      Console.WriteLine("----------------------------------------------");
      OpenFileTest();
      Console.ReadKey();
    } 

    public void TestCleanup()
    {
      //取得根目录资料夹
      var directories = access.GetDirectories(@"/");

      // 移除预设目录：tmp、user 外的目录
      foreach (var directory in directories)
      {
        if ("tmp".Equals(directory) || "user".Equals(directory))
        {
          continue;
        }
        else
        {
          access.DeleteDirectory(directory);
        }
      }

      // 取得根目录档案
      var files = access.GetFiles(@"/");

      // 移除所有档案
      foreach (var file in files)
      {
        access.DeleteFile(file);
      }

      // 移除 OpenFile 转存档案
      File.Delete(Path.Combine(Directory.GetCurrentDirectory(), "Test.jpg"));
    }

    //_传入根目录_预期回传预设目录
    public static void GetDirectoriesTest()
    {
      // 预设根目录下有两个目录：tmp、user
      var expected = new List<string>() { "tmp", "user", };

      var actual = access.GetDirectories(@"/");

      foreach (var item in actual)
      {
        Console.WriteLine(item);
      }

    }

    //_传入根目录_预期回传空集合
    public static void GetFilesTest()
    {
      // 预设根目录下没有档案
      var expected = new List<string>();

      var actual = access.GetFiles(@"/");
      foreach (var item in actual)
      {
        Console.WriteLine(item);
      }

    }

    //_建立zzz目录_预期成功_预期根目录下有zzz目录_删除zzz目录_预期成功_预期根目录下无zzz目录
    public static void DirectoryTest()
    {
      var directoryName = "zzz";

      // 建立zzz目录
      var boolCreateDirectory = access.CreateDirectory(directoryName);

      Console.WriteLine("建立zzz目录_预期成功:"+boolCreateDirectory);

      // 建立zzz目录_预期成功_预期根目录下有zzz目录
      // 预设根目录下有三个目录：tmp、user、zzz
      var expectedCreateDirectory = new List<string>() { "tmp", "user", directoryName, };

      var actualCreateDirectory = access.GetDirectories(@"/");


      foreach (var item in actualCreateDirectory)
      {
        Console.WriteLine(item);
      }

      Console.WriteLine("********************************************");
      // 删除zzz目录
      var boolDeleteDirectory = access.DeleteDirectory(directoryName);

      Console.WriteLine("删除zzz目录_预期成功:" + boolDeleteDirectory);


      // 删除zzz目录_预期成功_预期根目录下无zzz目录
      // 预设根目录下有两个目录：tmp、user
      var expectedDeleteDirectory = new List<string>() { "tmp", "user", };

      var actualDeleteDirectory = access.GetDirectories(@"/");

      foreach (var item in actualDeleteDirectory)
      {
        Console.WriteLine(item);
      }
    }

    //_建立Test档案_预期根目录下有Test档案_删除Test档案_预期成功_预期根目录下无Test档案
    public static void FileTest()
    {
      var localFile = Path.Combine(Directory.GetCurrentDirectory(), "TestFolder", "Test.jpg");

      var remotePath = "Test.jpg";

      // 建立Test档案
      var boolCreateFile = access.CreateFile(localFile, remotePath);

      // 建立Test档案_预期根目录下有Test档案
      var expectedCreateFile = new List<string>() { remotePath, };

      var actualCreateFile = access.GetFiles(@"/");

      foreach (var item in actualCreateFile)
      {
        Console.WriteLine(item);
      }
      Console.WriteLine("********************************************");
      // 删除Test档案
      var boolDeleteFile = access.DeleteDirectory(remotePath);

      Console.WriteLine("删除Test档案_预期成功:"+boolDeleteFile);

      // 删除Test档案_预期成功_预期根目录下无Test档案
      var expectedDeleteFile = new List<string>();

      var actualDeleteFile = access.GetFiles(@"/");

      foreach (var item in actualDeleteFile)
      {
        Console.WriteLine(item);
      }
    }

    //_建立Test档案_预期根目录下有Test档案_取得Test档案_预期成功_预期回传Test档案Stream并转存成功
    public static void OpenFileTest()
    {
      var localFile = Path.Combine(Directory.GetCurrentDirectory(), "TestFolder", "Test.jpg");
      var remotePath = "Test.jpg";
      var saveFile = Path.Combine(Directory.GetCurrentDirectory(), "Test.jpg");

      Console.WriteLine("saveFile:" + saveFile);
      Console.WriteLine("********************************************");
      // 建立Test档案
      var boolCreateFile = access.CreateFile(localFile, remotePath);

      // 建立Test档案_预期根目录下有Test档案
      var expectedCreateFile = new List<string>() { remotePath, };

      var actualCreateFile = access.GetFiles(@"/");

      foreach (var item in actualCreateFile)
      {
        Console.WriteLine(item);
      }


      Console.WriteLine("********************************************");
      // 取得Test档案
      var response = access.OpenFile(remotePath);

      // 取得Test档案_预期成功
      response.EnsureSuccessStatusCode();

      // 取得Test档案_预期成功_预期回传Test档案Stream并转存成功
      using (var fs = File.Create(saveFile))
      {
        response.Content.CopyToAsync(fs).Wait();
      }

      Console.WriteLine(File.Exists(saveFile));

    }
  }
}

运行结果如图:

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

ASP.NET,Hadoop增删改查,.NET实现Hadoop增删改查

标签：

ASP.NET,Hadoop增删改查,.NET实现Hadoop增删改查

无为清净楼资源网 Design By www.qnjia.com

广告合作：本站广告合作请联系QQ：858582 申请时备注：广告合作（否则不回）
免责声明：本站文章均来自网站采集或用户投稿，网站不提供任何软件下载或自行开发的软件！如有用户或公司发现本站内容信息存在侵权行为，请邮件告知！ 858582#qq.com

无为清净楼资源网 Design By www.qnjia.com

评论“ASP.NET实现Hadoop增删改查的示例代码”

暂无评论...

www.qnjia.com 无为清净楼资源网

139,976互联网资源

144,792高清电影

21,817无损音乐

631,128技术资源

ASP.NET实现Hadoop增删改查的示例代码

ASP.NET,Hadoop增删改查,.NET实现Hadoop增删改查

如何在ASP.NET Core应用程序运行Vue并且部署在IIS上详解

asp.net mvc中Forms身份验证身份验证流程

评论“ASP.NET实现Hadoop增删改查的示例代码”

RTX 5090要首发性能要翻倍！三星展示GDDR7显存

更新日志

友情链接

ASP.NET实现Hadoop增删改查的示例代码

ASP.NET,Hadoop增删改查,.NET实现Hadoop增删改查

如何在ASP.NET Core应用程序运行Vue并且部署在IIS上详解

asp.net mvc中Forms身份验证身份验证流程

评论“ASP.NET实现Hadoop增删改查的示例代码”

RTX 5090要首发 性能要翻倍！三星展示GDDR7显存

更新日志

友情链接

RTX 5090要首发性能要翻倍！三星展示GDDR7显存