org.apache.hadoop.hdfs.server.namenode

类 ListPathsServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

org.apache.hadoop.hdfs.server.namenode.ListPathsServlet

所有已实现的接口:

Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class ListPathsServlet
extends javax.servlet.http.HttpServlet

Obtain meta-information about a filesystem.

另请参阅:

HftpFileSystem, 序列化表格

字段概要

字段

限定符和类型	字段和说明
static ThreadLocal<SimpleDateFormat>	df

构造器概要

构造器

构造器和说明
ListPathsServlet()

方法概要

方法

限定符和类型	方法和说明
protected Map<String,String>	buildRoot(javax.servlet.http.HttpServletRequest request, org.znerd.xmlenc.XMLOutputter doc) Build a map from the query string, setting values and defaults.
protected ClientProtocol	createNameNodeProxy() Create a NameNode proxy from the current ServletContext.
protected URI	createRedirectUri(String servletpath, UserGroupInformation ugi, DatanodeID host, javax.servlet.http.HttpServletRequest request, String tokenString) Create a URI for redirecting request
void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Service a GET request as described below.
protected String	getFilename(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Get filename from the request
protected UserGroupInformation	getUGI(javax.servlet.http.HttpServletRequest request, Configuration conf) Get UserGroupInformation from request * @throws IOException
protected void	writeXml(Exception except, String path, org.znerd.xmlenc.XMLOutputter doc) Write the object to XML format

从类继承的方法 javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service

从类继承的方法 javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, init, log, log

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

df

public static final ThreadLocal<SimpleDateFormat> df

构造器详细资料

ListPathsServlet

public ListPathsServlet()

方法详细资料

buildRoot

protected Map<String,String> buildRoot(javax.servlet.http.HttpServletRequest request,
                           org.znerd.xmlenc.XMLOutputter doc)

Build a map from the query string, setting values and defaults.

doGet

public void doGet(javax.servlet.http.HttpServletRequest request,
         javax.servlet.http.HttpServletResponse response)
           throws javax.servlet.ServletException,
                  IOException

Service a GET request as described below. Request: GET http://<nn>:<port>/listPaths[/<path>][<?option>[&option]*] HTTP/1.1 Where option (default) in: recursive ("no") filter (".*") exclude ("\..*\.crc") Response: A flat list of files/directories in the following format: <listing path="..." recursive="(yes|no)" filter="..." time="yyyy-MM-dd hh:mm:ss UTC" version="..."> <directory path="..." modified="yyyy-MM-dd hh:mm:ss"/> <file path="..." modified="yyyy-MM-dd'T'hh:mm:ssZ" accesstime="yyyy-MM-dd'T'hh:mm:ssZ" blocksize="..." replication="..." size="..."/> </listing>

覆盖:

doGet 在类中 javax.servlet.http.HttpServlet

抛出:

javax.servlet.ServletException

IOException

writeXml

protected void writeXml(Exception except,
            String path,
            org.znerd.xmlenc.XMLOutputter doc)
                 throws IOException

Write the object to XML format

抛出:

IOException

getUGI

protected UserGroupInformation getUGI(javax.servlet.http.HttpServletRequest request,
                          Configuration conf)
                               throws IOException

Get UserGroupInformation from request * @throws IOException

抛出:

IOException

createNameNodeProxy

protected ClientProtocol createNameNodeProxy()
                                      throws IOException

Create a NameNode proxy from the current ServletContext.

抛出:

IOException

createRedirectUri

protected URI createRedirectUri(String servletpath,
                    UserGroupInformation ugi,
                    DatanodeID host,
                    javax.servlet.http.HttpServletRequest request,
                    String tokenString)
                         throws URISyntaxException

Create a URI for redirecting request

抛出:

URISyntaxException

getFilename

protected String getFilename(javax.servlet.http.HttpServletRequest request,
                 javax.servlet.http.HttpServletResponse response)
                      throws IOException

Get filename from the request

抛出:

IOException