ASP.NET实现Hadoop增删改查的示例代码

<?xml version="1.0" encoding="utf-8"?><packages> <package id="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>

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;    }  }}

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));    }  }}