com.hazelcast.cp.internal.raft.impl.log

Class LogEntry

java.lang.Object

com.hazelcast.cp.internal.raft.impl.log.LogEntry

All Implemented Interfaces:

DataSerializable, IdentifiedDataSerializable

Direct Known Subclasses:

SnapshotEntry

public class LogEntry
extends Object
implements IdentifiedDataSerializable

Represents an entry in the RaftLog. Each log entry stores a state machine command along with the term number when the entry was received by the leader. The term numbers in log entries are used to detect inconsistencies between logs. Each log entry also has an integer index identifying its position in the log.

Constructor Summary

Constructors

Constructor and Description
LogEntry()
LogEntry(int term, long index, Object operation)

Method Summary

Modifier and Type	Method and Description
int	getFactoryId() Returns DataSerializableFactory factory ID for this class.
int	getId() Returns type identifier for this class.
long	index()
Object	operation()
void	readData(ObjectDataInput in) Reads fields from the input stream
int	term()
String	toString()
void	writeData(ObjectDataOutput out) Writes object fields to output stream

Methods inherited from class java.lang.Object

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

Constructor Detail

LogEntry

public LogEntry()

LogEntry

public LogEntry(int term,
                long index,
                Object operation)

Method Detail

index

public long index()

term

public int term()

operation

public Object operation()

writeData

public void writeData(ObjectDataOutput out)
               throws IOException

Description copied from interface: DataSerializable

Writes object fields to output stream

Specified by:

writeData in interface DataSerializable

Parameters:

out - output

Throws:

IOException - if an I/O error occurs. In particular, an IOException may be thrown if the output stream has been closed.

readData

public void readData(ObjectDataInput in)
              throws IOException

Description copied from interface: DataSerializable

Reads fields from the input stream

Specified by:

readData in interface DataSerializable

Parameters:

in - input

Throws:

IOException - if an I/O error occurs. In particular, an IOException may be thrown if the input stream has been closed.

getFactoryId

public int getFactoryId()

Description copied from interface: IdentifiedDataSerializable

Returns DataSerializableFactory factory ID for this class.

Specified by:

getFactoryId in interface IdentifiedDataSerializable

Returns:

factory ID

getId

public int getId()

Description copied from interface: IdentifiedDataSerializable

Returns type identifier for this class. It should be unique per DataSerializableFactory.

Specified by:

getId in interface IdentifiedDataSerializable

Returns:

type ID

toString

public String toString()

Overrides:

toString in class Object