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java.lang.Object javax.servlet.GenericServlet javax.servlet.http.HttpServlet org.apache.hadoop.dfs.FileDataServlet
public class FileDataServlet
Redirect queries about the hosted filesystem to an appropriate datanode.
HftpFileSystem
,
Serialized FormConstructor Summary | |
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FileDataServlet()
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Method Summary | |
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protected org.apache.hadoop.dfs.ClientProtocol |
createNameNodeProxy(UnixUserGroupInformation ugi)
Create a NameNode proxy from the current ServletContext . |
void |
doGet(javax.servlet.http.HttpServletRequest request,
javax.servlet.http.HttpServletResponse response)
Service a GET request as described below. |
protected UnixUserGroupInformation |
getUGI(javax.servlet.http.HttpServletRequest request)
Get UserGroupInformation from request |
Methods inherited from class javax.servlet.http.HttpServlet |
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doDelete, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service |
Methods inherited from class javax.servlet.GenericServlet |
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destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, init, log, log |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public FileDataServlet()
Method Detail |
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public void doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws IOException
GET http://<nn>:<port>/data[/<path>] HTTP/1.1
doGet
in class javax.servlet.http.HttpServlet
IOException
protected UnixUserGroupInformation getUGI(javax.servlet.http.HttpServletRequest request)
UserGroupInformation
from request
protected org.apache.hadoop.dfs.ClientProtocol createNameNodeProxy(UnixUserGroupInformation ugi) throws IOException
NameNode
proxy from the current ServletContext
.
IOException
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