org.apache.hadoop.hdfs.server.namenode

Class FSEditLogOp

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.FSEditLogOp

@InterfaceAudience.Private
@InterfaceStability.Unstable
public abstract class FSEditLogOp
extends Object

Helper classes for reading the ops from an InputStream. All ops derive from FSEditLogOp and are only instantiated from Reader#readOp()

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FSEditLogOp.OpInstanceCache
static class	FSEditLogOp.Reader Class for reading editlog ops from a stream
static class	FSEditLogOp.Writer Class for writing editlog ops

Field Summary

Fields

Modifier and Type	Field and Description
FSEditLogOpCodes	opCode

Method Summary

Methods

Modifier and Type	Method and Description
static Block	blockFromXml(XMLUtils.Stanza st)
static void	blockToXml(ContentHandler contentHandler, Block block)
void	decodeXml(XMLUtils.Stanza st)
static DelegationKey	delegationKeyFromXml(XMLUtils.Stanza st)
static void	delegationKeyToXml(ContentHandler contentHandler, DelegationKey key)
static DelegationTokenIdentifier	delegationTokenFromXml(XMLUtils.Stanza st)
static void	delegationTokenToXml(ContentHandler contentHandler, DelegationTokenIdentifier token)
int	getCallId() this has to be called after calling hasRpcIds()
byte[]	getClientId() this has to be called after calling hasRpcIds()
long	getTransactionId()
String	getTransactionIdStr()
boolean	hasRpcIds()
boolean	hasTransactionId()
void	outputToXml(ContentHandler contentHandler)
static PermissionStatus	permissionStatusFromXml(XMLUtils.Stanza st)
static void	permissionStatusToXml(ContentHandler contentHandler, PermissionStatus perm)
void	setRpcCallId(int callId)
void	setRpcClientId(byte[] clientId)
void	setTransactionId(long txid)
protected abstract void	toXml(ContentHandler contentHandler)
abstract void	writeFields(DataOutputStream out)

Methods inherited from class java.lang.Object

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

Field Detail

opCode

public final FSEditLogOpCodes opCode

Method Detail

getTransactionId

public long getTransactionId()

getTransactionIdStr

public String getTransactionIdStr()

hasTransactionId

public boolean hasTransactionId()

setTransactionId

public void setTransactionId(long txid)

hasRpcIds

public boolean hasRpcIds()

getClientId

public byte[] getClientId()

this has to be called after calling hasRpcIds()

setRpcClientId

public void setRpcClientId(byte[] clientId)

getCallId

public int getCallId()

this has to be called after calling hasRpcIds()

setRpcCallId

public void setRpcCallId(int callId)

writeFields

public abstract void writeFields(DataOutputStream out)
                          throws IOException

Throws:

IOException

outputToXml

public void outputToXml(ContentHandler contentHandler)
                 throws SAXException

Throws:

SAXException

toXml

protected abstract void toXml(ContentHandler contentHandler)
                       throws SAXException

Throws:

SAXException

decodeXml

public void decodeXml(XMLUtils.Stanza st)
               throws XMLUtils.InvalidXmlException

Throws:

XMLUtils.InvalidXmlException

blockToXml

public static void blockToXml(ContentHandler contentHandler,
              Block block)
                       throws SAXException

Throws:

SAXException

blockFromXml

public static Block blockFromXml(XMLUtils.Stanza st)
                          throws XMLUtils.InvalidXmlException

Throws:

XMLUtils.InvalidXmlException

delegationTokenToXml

public static void delegationTokenToXml(ContentHandler contentHandler,
                        DelegationTokenIdentifier token)
                                 throws SAXException

Throws:

SAXException

delegationTokenFromXml

public static DelegationTokenIdentifier delegationTokenFromXml(XMLUtils.Stanza st)
                                                        throws XMLUtils.InvalidXmlException

Throws:

XMLUtils.InvalidXmlException

delegationKeyToXml

public static void delegationKeyToXml(ContentHandler contentHandler,
                      DelegationKey key)
                               throws SAXException

Throws:

SAXException

delegationKeyFromXml

public static DelegationKey delegationKeyFromXml(XMLUtils.Stanza st)
                                          throws XMLUtils.InvalidXmlException

Throws:

XMLUtils.InvalidXmlException

permissionStatusToXml

public static void permissionStatusToXml(ContentHandler contentHandler,
                         PermissionStatus perm)
                                  throws SAXException

Throws:

SAXException

permissionStatusFromXml

public static PermissionStatus permissionStatusFromXml(XMLUtils.Stanza st)
                                                throws XMLUtils.InvalidXmlException

Throws:

XMLUtils.InvalidXmlException