org.apache.hadoop.dfs
Class ListPathsServlet

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          org.apache.hadoop.dfs.ListPathsServlet

All Implemented Interfaces:

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

public class ListPathsServlet
extends javax.servlet.http.HttpServlet

Obtain meta-information about a filesystem.

See Also:

HftpFileSystem, Serialized Form

Constructor Summary

ListPathsServlet()

Method Summary

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 org.apache.hadoop.dfs.ClientProtocol	createNameNodeProxy(UnixUserGroupInformation ugi) Create a NameNode proxy from the current ServletContext.
void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Service a GET request as described below.
protected UnixUserGroupInformation	getUGI(javax.servlet.http.HttpServletRequest request) Get UserGroupInformation from request

Methods inherited from class javax.servlet.http.HttpServlet

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

Methods inherited from class javax.servlet.GenericServlet

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ListPathsServlet

public ListPathsServlet()

Method Detail

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" blocksize="..." replication="..." size="..."/> </listing>

Overrides:

doGet in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

IOException

getUGI

protected UnixUserGroupInformation getUGI(javax.servlet.http.HttpServletRequest request)

Get UserGroupInformation from request

createNameNodeProxy

protected org.apache.hadoop.dfs.ClientProtocol createNameNodeProxy(UnixUserGroupInformation ugi)
                                                            throws IOException

Create a NameNode proxy from the current ServletContext.

Throws:

IOException