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

java.lang.Object
  extended by javax.servlet.GenericServlet
      extended by javax.servlet.http.HttpServlet
          extended by org.apache.hadoop.hdfs.server.namenode.ListPathsServlet
All Implemented Interfaces:
Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

@InterfaceAudience.Private
public class ListPathsServlet
extends javax.servlet.http.HttpServlet

Obtain meta-information about a filesystem.

See Also:
HftpFileSystem, Serialized Form

Field Summary
static ThreadLocal<SimpleDateFormat> df
           
 
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  ClientProtocol createNameNodeProxy()
          Create a NameNode proxy from the current ServletContext.
protected  URI createRedirectUri(String servletpath, org.apache.hadoop.security.UserGroupInformation ugi, DatanodeID host, javax.servlet.http.HttpServletRequest request, NameNode nn)
          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  org.apache.hadoop.security.UserGroupInformation getUGI(javax.servlet.http.HttpServletRequest request, org.apache.hadoop.conf.Configuration conf)
           
 
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
 

Field Detail

df

public static final ThreadLocal<SimpleDateFormat> df
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" accesstime="yyyy-MM-dd'T'hh:mm:ssZ" blocksize="..." replication="..." size="..."/> </listing>

Overrides:
doGet in class javax.servlet.http.HttpServlet
Throws:
javax.servlet.ServletException
IOException

createNameNodeProxy

protected ClientProtocol createNameNodeProxy()
                                      throws IOException
Create a NameNode proxy from the current ServletContext.

Throws:
IOException

createRedirectUri

protected URI createRedirectUri(String servletpath,
                                org.apache.hadoop.security.UserGroupInformation ugi,
                                DatanodeID host,
                                javax.servlet.http.HttpServletRequest request,
                                NameNode nn)
                         throws IOException,
                                URISyntaxException
Create a URI for redirecting request

Throws:
IOException
URISyntaxException

getFilename

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

Throws:
IOException

getUGI

protected org.apache.hadoop.security.UserGroupInformation getUGI(javax.servlet.http.HttpServletRequest request,
                                                                 org.apache.hadoop.conf.Configuration conf)
                                                          throws IOException
Throws:
IOException


Copyright © 2009 The Apache Software Foundation