org.apache.hadoop.hdfs.server.namenode
Class StreamFile

java.lang.Object
  extended by javax.servlet.GenericServlet
      extended by javax.servlet.http.HttpServlet
          extended by org.apache.hadoop.hdfs.server.namenode.StreamFile
All Implemented Interfaces:
Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

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

See Also:
Serialized Form

Constructor Summary
StreamFile()
           
 
Method Summary
protected  ClientProtocol createNameNodeProxy()
          Create a NameNode proxy from the current ServletContext.
protected  URI createRedirectUri(String servletpath, org.apache.hadoop.security.UserGroupInformation ugi, DatanodeID host, javax.servlet.http.HttpServletRequest request, NameNode nn)
          Create a URI for redirecting request
 void doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
           
protected  DFSClient getDFSClient(javax.servlet.http.HttpServletRequest request)
          getting a client for connecting to dfs
protected  String getFilename(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
          Get filename from the request
protected  org.apache.hadoop.security.UserGroupInformation getUGI(javax.servlet.http.HttpServletRequest request, org.apache.hadoop.conf.Configuration conf)
           
 
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
 

Constructor Detail

StreamFile

public StreamFile()
Method Detail

getDFSClient

protected DFSClient getDFSClient(javax.servlet.http.HttpServletRequest request)
                          throws IOException,
                                 InterruptedException
getting a client for connecting to dfs

Throws:
IOException
InterruptedException

doGet

public void doGet(javax.servlet.http.HttpServletRequest request,
                  javax.servlet.http.HttpServletResponse response)
           throws javax.servlet.ServletException,
                  IOException
Overrides:
doGet in class javax.servlet.http.HttpServlet
Throws:
javax.servlet.ServletException
IOException

createNameNodeProxy

protected ClientProtocol createNameNodeProxy()
                                      throws IOException
Create a NameNode proxy from the current ServletContext.

Throws:
IOException

createRedirectUri

protected URI createRedirectUri(String servletpath,
                                org.apache.hadoop.security.UserGroupInformation ugi,
                                DatanodeID host,
                                javax.servlet.http.HttpServletRequest request,
                                NameNode nn)
                         throws IOException,
                                URISyntaxException
Create a URI for redirecting request

Throws:
IOException
URISyntaxException

getFilename

protected String getFilename(javax.servlet.http.HttpServletRequest request,
                             javax.servlet.http.HttpServletResponse response)
                      throws IOException
Get filename from the request

Throws:
IOException

getUGI

protected org.apache.hadoop.security.UserGroupInformation getUGI(javax.servlet.http.HttpServletRequest request,
                                                                 org.apache.hadoop.conf.Configuration conf)
                                                          throws IOException
Throws:
IOException


Copyright © 2009 The Apache Software Foundation