org.apache.hadoop.http
Class HttpServer

java.lang.Object
  org.apache.hadoop.http.HttpServer

All Implemented Interfaces:

FilterContainer

public class HttpServer
extends Object
implements FilterContainer

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: "/logs/" -> points to the log directory "/static/" -> points to common static files (src/webapps/static) "/" -> the jsp server code from (src/webapps/)

Nested Class Summary

static class

HttpServer.StackServlet A very simple servlet to serve up a text representation of the current stack traces.

Field Summary

protected Map<org.mortbay.jetty.servlet.Context,Boolean>	defaultContexts
protected List<String>	filterNames
protected boolean	findPort
protected org.mortbay.jetty.Connector	listener
static org.apache.commons.logging.Log	LOG
protected org.mortbay.jetty.webapp.WebAppContext	webAppContext
protected org.mortbay.jetty.Server	webServer

Constructor Summary

HttpServer(String name, String bindAddress, int port, boolean findPort)
Same as this(name, bindAddress, port, findPort, null);

HttpServer(String name, String bindAddress, int port, boolean findPort, Configuration conf)
Create a status server on the given port.

Method Summary

void	addContext(org.mortbay.jetty.servlet.Context ctxt, boolean isFiltered)
protected void	addContext(String pathSpec, String dir, boolean isFiltered) Add a context
protected void	addDefaultApps(org.mortbay.jetty.handler.ContextHandlerCollection parent, String appDir) Add default apps.
protected void	addDefaultServlets() Add default servlets.
void	addFilter(String name, String classname, Map<String,String> parameters) Add a filter to the container.
protected void	addFilterPathMapping(String pathSpec, org.mortbay.jetty.servlet.Context webAppCtx) Add the path spec to the filter path mapping.
void	addGlobalFilter(String name, String classname, Map<String,String> parameters) Add a global filter to the container.
void	addInternalServlet(String name, String pathSpec, Class<? extends javax.servlet.http.HttpServlet> clazz) Deprecated. this is a temporary method
void	addServlet(String name, String pathSpec, Class<? extends javax.servlet.http.HttpServlet> clazz) Add a servlet in the server.
void	addSslListener(InetSocketAddress addr, Configuration sslConf, boolean needClientAuth) Configure an ssl listener on the server.
void	addSslListener(InetSocketAddress addr, String keystore, String storPass, String keyPass) Deprecated. Use addSslListener(InetSocketAddress, Configuration, boolean)
protected org.mortbay.jetty.Connector	createBaseListener(Configuration conf) Create a required listener for the Jetty instance listening on the port provided.
protected void	defineFilter(org.mortbay.jetty.servlet.Context ctx, String name, String classname, Map<String,String> parameters, String[] urls) Define a filter for a context and set up default url mappings.
Object	getAttribute(String name) Get the value in the webapp context.
int	getPort() Get the port that the server is on
protected String	getWebAppsPath() Get the pathname to the webapps files.
void	join()
void	setAttribute(String name, Object value) Set a value in the webapp context.
void	setThreads(int min, int max) Set the min, max number of worker threads (simultaneous connections).
void	start() Start the server.
void	stop() stop the server

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.apache.commons.logging.Log LOG

webServer

protected final org.mortbay.jetty.Server webServer

listener

protected final org.mortbay.jetty.Connector listener

webAppContext

protected final org.mortbay.jetty.webapp.WebAppContext webAppContext

findPort

protected final boolean findPort

defaultContexts

protected final Map<org.mortbay.jetty.servlet.Context,Boolean> defaultContexts

filterNames

protected final List<String> filterNames

Constructor Detail

HttpServer

public HttpServer(String name,
                  String bindAddress,
                  int port,
                  boolean findPort)
           throws IOException

Same as this(name, bindAddress, port, findPort, null);

Throws:

IOException

HttpServer

public HttpServer(String name,
                  String bindAddress,
                  int port,
                  boolean findPort,
                  Configuration conf)
           throws IOException

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

Parameters:

name - The name of the server

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.

conf - Configuration

Throws:

IOException

Method Detail

createBaseListener

protected org.mortbay.jetty.Connector createBaseListener(Configuration conf)
                                                  throws IOException

Create a required listener for the Jetty instance listening on the port provided. This wrapper and all subclasses must create at least one listener.

Throws:

IOException

addDefaultApps

protected void addDefaultApps(org.mortbay.jetty.handler.ContextHandlerCollection parent,
                              String appDir)
                       throws IOException

Add default apps.

Parameters:

appDir - The application directory

Throws:

IOException

addDefaultServlets

protected void addDefaultServlets()

Add default servlets.

addContext

public void addContext(org.mortbay.jetty.servlet.Context ctxt,
                       boolean isFiltered)
                throws IOException

Throws:

IOException

addContext

protected void addContext(String pathSpec,
                          String dir,
                          boolean isFiltered)
                   throws IOException

Add a context

Parameters:

pathSpec - The path spec for the context

dir - The directory containing the context

isFiltered - if true, the servlet is added to the filter path mapping

Throws:

IOException

setAttribute

public void setAttribute(String name,
                         Object value)

Set a value in the webapp context. These values are available to the jsp pages as "application.getAttribute(name)".

Parameters:

name - The name of the attribute

value - The value of the attribute

addServlet

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

Add a servlet in the server.

Parameters:

name - The name of the servlet (can be passed as null)

pathSpec - The path spec for the servlet

clazz - The servlet class

addInternalServlet

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

Deprecated. this is a temporary method

Add an internal servlet in the server.

Parameters:

name - The name of the servlet (can be passed as null)

pathSpec - The path spec for the servlet

clazz - The servlet class

addFilter

public void addFilter(String name,
                      String classname,
                      Map<String,String> parameters)

Add a filter to the container.

Specified by:

addFilter in interface FilterContainer

Parameters:

name - Filter name

classname - Filter class name

parameters - a map from parameter names to initial values

addGlobalFilter

public void addGlobalFilter(String name,
                            String classname,
                            Map<String,String> parameters)

Add a global filter to the container.

Specified by:

addGlobalFilter in interface FilterContainer

Parameters:

name - filter name

classname - filter class name

parameters - a map from parameter names to initial values

defineFilter

protected void defineFilter(org.mortbay.jetty.servlet.Context ctx,
                            String name,
                            String classname,
                            Map<String,String> parameters,
                            String[] urls)

Define a filter for a context and set up default url mappings.

addFilterPathMapping

protected void addFilterPathMapping(String pathSpec,
                                    org.mortbay.jetty.servlet.Context webAppCtx)

Add the path spec to the filter path mapping.

Parameters:

pathSpec - The path spec

webAppCtx - The WebApplicationContext to add to

getAttribute

public Object getAttribute(String name)

Get the value in the webapp context.

Parameters:

name - The name of the attribute

Returns:

The value of the attribute

getWebAppsPath

protected String getWebAppsPath()
                         throws IOException

Get the pathname to the webapps files.

Returns:

the pathname as a URL

Throws:

IOException - if 'webapps' directory cannot be found on CLASSPATH.

getPort

public int getPort()

Get the port that the server is on

Returns:

the port

setThreads

public void setThreads(int min,
                       int max)

Set the min, max number of worker threads (simultaneous connections).

addSslListener

@Deprecated
public void addSslListener(InetSocketAddress addr,
                                      String keystore,
                                      String storPass,
                                      String keyPass)
                    throws IOException

Deprecated. Use addSslListener(InetSocketAddress, Configuration, boolean)

Configure an ssl listener on the server.

Parameters:

addr - address to listen on

keystore - location of the keystore

storPass - password for the keystore

keyPass - password for the key

Throws:

IOException

addSslListener

public void addSslListener(InetSocketAddress addr,
                           Configuration sslConf,
                           boolean needClientAuth)
                    throws IOException

Configure an ssl listener on the server.

Parameters:

addr - address to listen on

sslConf - conf to retrieve ssl options

needClientAuth - whether client authentication is required

Throws:

IOException

start

public void start()
           throws IOException

Start the server. Does not wait for the server to start.

Throws:

IOException

stop

public void stop()
          throws Exception

stop the server

Throws:

Exception

join

public void join()
          throws InterruptedException

Throws:

InterruptedException