org.apache.hadoop.hdfs.server.namenode

Class StartupProgressServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

org.apache.hadoop.hdfs.server.namenode.StartupProgressServlet

All Implemented Interfaces:

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

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

Servlet that provides a JSON representation of the namenode's current startup progress.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	PATH_SPEC

Constructor Summary

Constructors

Constructor and Description
StartupProgressServlet()

Method Summary

Methods

Modifier and Type	Method and Description
protected ClientProtocol	createNameNodeProxy() Create a NameNode proxy from the current ServletContext.
protected void	doGet(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)
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

PATH_SPEC

public static final String PATH_SPEC

See Also:

Constant Field Values

Constructor Detail

StartupProgressServlet

public StartupProgressServlet()

Method Detail

doGet

protected void doGet(javax.servlet.http.HttpServletRequest req,
         javax.servlet.http.HttpServletResponse resp)
              throws IOException

Overrides:

doGet in class javax.servlet.http.HttpServlet

Throws:

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