org.apache.hadoop.hdfs.server.namenode

Class ListPathsServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

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

Fields

Modifier and Type	Field and Description
static ThreadLocal<SimpleDateFormat>	df

Constructor Summary

Constructors

Constructor and Description
ListPathsServlet()

Method Summary

Methods

Modifier and Type	Method and Description
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.
void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Service a GET request as described below.
protected UserGroupInformation	getUGI(javax.servlet.http.HttpServletRequest request, Configuration conf)
protected void	writeXml(Exception except, String path, org.znerd.xmlenc.XMLOutputter doc) Write the object to XML format

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

writeXml

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

Write the object to XML format

Throws:

IOException

createNameNodeProxy

protected ClientProtocol createNameNodeProxy()
                                      throws IOException

Create a NameNode proxy from the current ServletContext.

Throws:

IOException

getUGI

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

Throws:

IOException