Package org.apache.hadoop.hdfs.qjournal.server

Class GetJournalEditServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

org.apache.hadoop.hdfs.server.namenode.DfsServlet

org.apache.hadoop.hdfs.qjournal.server.GetJournalEditServlet

All Implemented Interfaces:

java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

@Private
public class GetJournalEditServlet
extends DfsServlet

This servlet is used in two cases:

• The QuorumJournalManager, when reading edits, fetches the edit streams from the journal nodes.
• During edits synchronization, one journal node will fetch edits from another journal node.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
GetJournalEditServlet()

Method Summary

Modifier and Type	Method	Description
static java.lang.String	buildPath(java.lang.String journalId, long segmentTxId, NamespaceInfo nsInfo, boolean inProgressOk)
void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
protected boolean	isValidRequestor(javax.servlet.http.HttpServletRequest request, org.apache.hadoop.conf.Configuration conf)

Methods inherited from class org.apache.hadoop.hdfs.server.namenode.DfsServlet

getUGI

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

GetJournalEditServlet

public GetJournalEditServlet()

Method Detail

isValidRequestor

protected boolean isValidRequestor(javax.servlet.http.HttpServletRequest request,
                                   org.apache.hadoop.conf.Configuration conf)
                            throws java.io.IOException

Throws:

java.io.IOException

doGet

public void doGet(javax.servlet.http.HttpServletRequest request,
                  javax.servlet.http.HttpServletResponse response)
           throws javax.servlet.ServletException,
                  java.io.IOException

Overrides:

doGet in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

java.io.IOException

buildPath

public static java.lang.String buildPath(java.lang.String journalId,
                                         long segmentTxId,
                                         NamespaceInfo nsInfo,
                                         boolean inProgressOk)