org.apache.hadoop.hbase.http

Class InfoServer

java.lang.Object

org.apache.hadoop.hbase.http.InfoServer

@InterfaceAudience.Private
public class InfoServer
extends Object

Create a Jetty embedded server to answer http requests. The primary goal is to serve up status information for the server. There are three contexts: "/stacks/" -> points to stack trace "/static/" -> points to common static files (src/hbase-webapps/static) "/" -> the jsp server code from (src/hbase-webapps/<name>)

Field Summary

Fields

Modifier and Type	Field and Description
private static String	HBASE_APP_DIR
private HttpServer	httpServer

Constructor Summary

Constructors

Constructor and Description
InfoServer(String name, String bindAddress, int port, boolean findPort, org.apache.hadoop.conf.Configuration c) Create a status server on the given port.

Method Summary

Modifier and Type	Method and Description
void	addPrivilegedServlet(String name, String pathSpec, Class<? extends javax.servlet.http.HttpServlet> clazz)
void	addServlet(String name, String pathSpec, Class<? extends javax.servlet.http.HttpServlet> clazz) Deprecated. Use addUnprivilegedServlet(String, String, Class) or addPrivilegedServlet(String, String, Class) instead of this method which does not state outwardly what kind of authz rules will be applied to this servlet.
void	addUnprivilegedServlet(String name, String pathSpec, Class<? extends javax.servlet.http.HttpServlet> clazz)
(package private) org.apache.hadoop.security.authorize.AccessControlList	buildAdminAcl(org.apache.hadoop.conf.Configuration conf) Builds an ACL that will restrict the users who can issue commands to endpoints on the UI which are meant only for administrators.
static boolean	canUserModifyUI(javax.servlet.http.HttpServletRequest req, javax.servlet.ServletContext ctx, org.apache.hadoop.conf.Configuration conf) Returns true if and only if UI authentication (spnego) is enabled, UI authorization is enabled, and the requesting user is defined as an administrator.
int	getPort() Deprecated. Since 0.99.0
void	setAttribute(String name, Object value)
void	start()
void	stop()

Methods inherited from class java.lang.Object

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

Field Detail

HBASE_APP_DIR

private static final String HBASE_APP_DIR

See Also:

Constant Field Values

httpServer

private final HttpServer httpServer

Constructor Detail

InfoServer

public InfoServer(String name,
                  String bindAddress,
                  int port,
                  boolean findPort,
                  org.apache.hadoop.conf.Configuration c)
           throws IOException

Create a status server on the given port. The jsp scripts are taken from src/hbase-webapps/name.

Parameters:

name - The name of the server

bindAddress - address to bind to

port - The port to use on the server

findPort - whether the server should start at the given port and increment by 1 until it finds a free port.

c - the Configuration to build the server

Throws:

IOException - if getting one of the password fails or the server cannot be created

Method Detail

buildAdminAcl

org.apache.hadoop.security.authorize.AccessControlList buildAdminAcl(org.apache.hadoop.conf.Configuration conf)

Builds an ACL that will restrict the users who can issue commands to endpoints on the UI which are meant only for administrators.

addServlet

@Deprecated
public void addServlet(String name,
                                   String pathSpec,
                                   Class<? extends javax.servlet.http.HttpServlet> clazz)

Deprecated. Use addUnprivilegedServlet(String, String, Class) or addPrivilegedServlet(String, String, Class) instead of this method which does not state outwardly what kind of authz rules will be applied to this servlet.

Explicitly invoke addPrivilegedServlet(String, String, Class) or addUnprivilegedServlet(String, String, Class) instead of this method. This method will add a servlet which any authenticated user can access.

addUnprivilegedServlet

public void addUnprivilegedServlet(String name,
                                   String pathSpec,
                                   Class<? extends javax.servlet.http.HttpServlet> clazz)

See Also:

HttpServer.addUnprivilegedServlet(String, String, Class)

addPrivilegedServlet

public void addPrivilegedServlet(String name,
                                 String pathSpec,
                                 Class<? extends javax.servlet.http.HttpServlet> clazz)

See Also:

HttpServer.addPrivilegedServlet(String, String, Class)

setAttribute

public void setAttribute(String name,
                         Object value)

start

public void start()
           throws IOException

Throws:

IOException

getPort

@Deprecated
public int getPort()

Deprecated. Since 0.99.0

Returns:

the port of the info server

stop

public void stop()
          throws Exception

Throws:

Exception

canUserModifyUI

public static boolean canUserModifyUI(javax.servlet.http.HttpServletRequest req,
                                      javax.servlet.ServletContext ctx,
                                      org.apache.hadoop.conf.Configuration conf)

Returns true if and only if UI authentication (spnego) is enabled, UI authorization is enabled, and the requesting user is defined as an administrator. If the UI is set to readonly, this method always returns false.