org.apache.hadoop.hdfs.server.namenode

类 JspHelper

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.JspHelper

public class JspHelper
extends Object

字段概要

字段

限定符和类型	字段和说明
static String	CURRENT_CONF
static String	DELEGATION_PARAMETER_NAME
static InetSocketAddress	nameNodeAddr
static String	WEB_UGI_PROPERTY_NAME

构造器概要

构造器

构造器和说明
JspHelper()

方法概要

方法

限定符和类型	方法和说明
void	addTableFooter(javax.servlet.jsp.JspWriter out)
void	addTableHeader(javax.servlet.jsp.JspWriter out)
void	addTableRow(javax.servlet.jsp.JspWriter out, String[] columns)
void	addTableRow(javax.servlet.jsp.JspWriter out, String[] columns, int row)
static DatanodeInfo	bestNode(LocatedBlock blk)
static void	createTitle(javax.servlet.jsp.JspWriter out, javax.servlet.http.HttpServletRequest req, String file)
void	DFSNodesStatus(ArrayList<DatanodeDescriptor> live, ArrayList<DatanodeDescriptor> dead)
static int	getDefaultChunkSize(Configuration conf) Get the default chunk size.
static UserGroupInformation	getDefaultWebUser(Configuration conf) If security is turned off, what is the default web user?
static String	getDelegationTokenUrlParam(String tokenString) Returns the url parameter for the given token string.
static DFSClient	getDFSClient(UserGroupInformation user, InetSocketAddress addr, Configuration conf)
String	getInodeLimitText()
String	getSafeModeText()
static UserGroupInformation	getUGI(javax.servlet.http.HttpServletRequest request, Configuration conf) Same as getUGI(null, request, conf).
static UserGroupInformation	getUGI(javax.servlet.ServletContext context, javax.servlet.http.HttpServletRequest request, Configuration conf) Get UserGroupInformation and possibly the delegation token out of the request.
static UserGroupInformation	getUGI(javax.servlet.ServletContext context, javax.servlet.http.HttpServletRequest request, Configuration conf, UserGroupInformation.AuthenticationMethod secureAuthMethod, boolean tryUgiParameter) Get UserGroupInformation and possibly the delegation token out of the request.
String	getUpgradeStatusText()
static String	getVersionTable() Return a table containing version information.
static String	getWarningText(FSNamesystem fsn)
static void	printGotoForm(javax.servlet.jsp.JspWriter out, int namenodeInfoPort, String tokenString, String file)
static void	printPathWithLinks(String dir, javax.servlet.jsp.JspWriter out, int namenodeInfoPort, String tokenString)
DatanodeID	randomNode()
void	sortNodeList(ArrayList<DatanodeDescriptor> nodes, String field, String order)
void	streamBlockInAscii(InetSocketAddress addr, long blockId, Token<BlockTokenIdentifier> accessToken, long genStamp, long blockSize, long offsetIntoBlock, long chunkSizeToView, javax.servlet.jsp.JspWriter out, Configuration conf)
static int	string2ChunkSizeToView(String s, int defaultValue) Convert a String to chunk-size-to-view.

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

CURRENT_CONF

public static final String CURRENT_CONF

另请参阅:

常量字段值

WEB_UGI_PROPERTY_NAME

public static final String WEB_UGI_PROPERTY_NAME

另请参阅:

常量字段值

DELEGATION_PARAMETER_NAME

public static final String DELEGATION_PARAMETER_NAME

另请参阅:

常量字段值

nameNodeAddr

public static InetSocketAddress nameNodeAddr

构造器详细资料

JspHelper

public JspHelper()

方法详细资料

randomNode

public DatanodeID randomNode()
                      throws IOException

抛出:

IOException

bestNode

public static DatanodeInfo bestNode(LocatedBlock blk)
                             throws IOException

抛出:

IOException

streamBlockInAscii

public void streamBlockInAscii(InetSocketAddress addr,
                      long blockId,
                      Token<BlockTokenIdentifier> accessToken,
                      long genStamp,
                      long blockSize,
                      long offsetIntoBlock,
                      long chunkSizeToView,
                      javax.servlet.jsp.JspWriter out,
                      Configuration conf)
                        throws IOException

抛出:

IOException

DFSNodesStatus

public void DFSNodesStatus(ArrayList<DatanodeDescriptor> live,
                  ArrayList<DatanodeDescriptor> dead)

addTableHeader

public void addTableHeader(javax.servlet.jsp.JspWriter out)
                    throws IOException

抛出:

IOException

addTableRow

public void addTableRow(javax.servlet.jsp.JspWriter out,
               String[] columns)
                 throws IOException

抛出:

IOException

addTableRow

public void addTableRow(javax.servlet.jsp.JspWriter out,
               String[] columns,
               int row)
                 throws IOException

抛出:

IOException

addTableFooter

public void addTableFooter(javax.servlet.jsp.JspWriter out)
                    throws IOException

抛出:

IOException

getSafeModeText

public String getSafeModeText()

getWarningText

public static String getWarningText(FSNamesystem fsn)

getInodeLimitText

public String getInodeLimitText()

getUpgradeStatusText

public String getUpgradeStatusText()

sortNodeList

public void sortNodeList(ArrayList<DatanodeDescriptor> nodes,
                String field,
                String order)

printPathWithLinks

public static void printPathWithLinks(String dir,
                      javax.servlet.jsp.JspWriter out,
                      int namenodeInfoPort,
                      String tokenString)
                               throws IOException

抛出:

IOException

printGotoForm

public static void printGotoForm(javax.servlet.jsp.JspWriter out,
                 int namenodeInfoPort,
                 String tokenString,
                 String file)
                          throws IOException

抛出:

IOException

createTitle

public static void createTitle(javax.servlet.jsp.JspWriter out,
               javax.servlet.http.HttpServletRequest req,
               String file)
                        throws IOException

抛出:

IOException

getDefaultWebUser

public static UserGroupInformation getDefaultWebUser(Configuration conf)
                                              throws IOException

If security is turned off, what is the default web user?

参数:

conf - the configuration to look in

返回:

the remote user that was configuration

抛出:

IOException

getUGI

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

Same as getUGI(null, request, conf).

抛出:

IOException

getUGI

public static UserGroupInformation getUGI(javax.servlet.ServletContext context,
                          javax.servlet.http.HttpServletRequest request,
                          Configuration conf)
                                   throws IOException

Get UserGroupInformation and possibly the delegation token out of the request.

参数:

context - the Servlet context

request - the http request

conf - configuration

抛出:

AccessControlException - if the request has no token

IOException

getUGI

public static UserGroupInformation getUGI(javax.servlet.ServletContext context,
                          javax.servlet.http.HttpServletRequest request,
                          Configuration conf,
                          UserGroupInformation.AuthenticationMethod secureAuthMethod,
                          boolean tryUgiParameter)
                                   throws IOException

Get UserGroupInformation and possibly the delegation token out of the request.

参数:

context - the Servlet context

request - the http request

conf - configuration

secureAuthMethod - the AuthenticationMethod used in secure mode.

tryUgiParameter - Should it try the ugi parameter?

返回:

a new user from the request

抛出:

AccessControlException - if the request has no token

IOException

getDFSClient

public static DFSClient getDFSClient(UserGroupInformation user,
                     InetSocketAddress addr,
                     Configuration conf)
                              throws IOException,
                                     InterruptedException

抛出:

IOException

InterruptedException

getDelegationTokenUrlParam

public static String getDelegationTokenUrlParam(String tokenString)

Returns the url parameter for the given token string.

参数:

tokenString -

返回:

url parameter

string2ChunkSizeToView

public static int string2ChunkSizeToView(String s,
                         int defaultValue)

Convert a String to chunk-size-to-view.

getDefaultChunkSize

public static int getDefaultChunkSize(Configuration conf)

Get the default chunk size.

参数:

conf - the configuration

返回:

the number of bytes to chunk in

getVersionTable

public static String getVersionTable()

Return a table containing version information.