com.epam.fixengine.storage.file
Class MMFIndexedMessageStorage

java.lang.Object
  com.epam.fixengine.storage.file.AbstractFileMessageStorage
      com.epam.fixengine.storage.file.MMFIndexedMessageStorage

All Implemented Interfaces:

MessageStorage

public class MMFIndexedMessageStorage
extends AbstractFileMessageStorage

WARNING: This implementation used class which is Sun proprietary API(HotSpot VM).

WARNING: Can persist message with sequence number is not greater than 178,956,969.

User: Mykhailo_Sereda Date: 16.05.12 Time: 11:38

Field Summary

protected long	channelLength
protected long	channelPosition
protected byte[]	dateFormattedBuffer
protected int	indexGrowSize
protected int	storageGrowSize
protected long	timestamp
protected boolean	timestampsInLogs

Fields inherited from class com.epam.fixengine.storage.file.AbstractFileMessageStorage

accessFile, calendar, channel, configuration

Constructor Summary

MMFIndexedMessageStorage(Configuration config)

Method Summary

long	appendMessageInternal(long timestamp, byte[] message, int offset, int length) Appends message to storage
protected long	appendMessageToFile(long timestamp, byte[] message, int offset, int length)
protected void	backupStorageFile(String fullPathToStorageFile, String fullPathToDestinationBackupFile) Backups storage file.
void	close() Close the storage.
protected void	deleteStorageFile(String fullPathToStorageFile) Deletes storage file.
protected int	getFormatLength()
protected long	getLastStoragePosition()
protected long	getNextSequenceNumber() Gets next sequence number.
long	initialize() Opens the indexed file.
protected byte[]	readFromStorage(FileChannel readChannel, long readFrom, int msgLen)
void	retrieveMessages(long from, long to, MessageStorageListener listener, boolean blocking) Retrieves message from storage.

Methods inherited from class com.epam.fixengine.storage.file.AbstractFileMessageStorage

appendMessage, appendMessage, appendMessageInternal, backupFile, backupStorage, deleteFile, getFile, getPrefixFormat, initialized, isClosed, openStorageFile, retrieveMessage, setBackupFileLocator, setFile

Methods inherited from class java.lang.Object

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

Field Detail

timestamp

protected long timestamp

dateFormattedBuffer

protected byte[] dateFormattedBuffer

timestampsInLogs

protected boolean timestampsInLogs

storageGrowSize

protected int storageGrowSize

channelPosition

protected long channelPosition

channelLength

protected long channelLength

indexGrowSize

protected int indexGrowSize

Constructor Detail

MMFIndexedMessageStorage

public MMFIndexedMessageStorage(Configuration config)

Method Detail

initialize

public long initialize()
                throws IOException

Opens the indexed file. Make mapped byte buffers

Specified by:

initialize in interface MessageStorage

Overrides:

initialize in class AbstractFileMessageStorage

Returns:

last send sequence number

Throws:

IOException - - if I/O errors occurred

See Also:

AbstractFileMessageStorage.initialize()

getFormatLength

protected int getFormatLength()

Overrides:

getFormatLength in class AbstractFileMessageStorage

appendMessageInternal

public long appendMessageInternal(long timestamp,
                                  byte[] message,
                                  int offset,
                                  int length)
                           throws IOException

Description copied from class: AbstractFileMessageStorage

Appends message to storage

Specified by:

appendMessageInternal in class AbstractFileMessageStorage

Parameters:

timestamp - the timestamp parameter

message - the array of bytes

length - @throws IOException - if I/O error occurred

Throws:

IOException

See Also:

AbstractFileMessageStorage.appendMessageInternal(long, byte[], int, int)

retrieveMessages

public void retrieveMessages(long from,
                             long to,
                             MessageStorageListener listener,
                             boolean blocking)
                      throws IOException

Retrieves message from storage.

Specified by:

retrieveMessages in interface MessageStorage

Specified by:

retrieveMessages in class AbstractFileMessageStorage

Parameters:

from - the start sequence position

to - the end sequence position

listener - the callback listener

blocking - if sets to true the method call not blocking

Throws:

java.io.IOException, - IllegalArgumentException

IOException - - if error occurred.

See Also:

FlatFileMessageStorage

readFromStorage

protected byte[] readFromStorage(FileChannel readChannel,
                                 long readFrom,
                                 int msgLen)
                          throws IOException

Throws:

IOException

appendMessageToFile

protected long appendMessageToFile(long timestamp,
                                   byte[] message,
                                   int offset,
                                   int length)
                            throws IOException

Throws:

IOException

getNextSequenceNumber

protected long getNextSequenceNumber()
                              throws IOException

Description copied from class: AbstractFileMessageStorage

Gets next sequence number.

Specified by:

getNextSequenceNumber in class AbstractFileMessageStorage

Throws:

IOException - - if I/O error occurred

See Also:

AbstractFileMessageStorage.getNextSequenceNumber()

getLastStoragePosition

protected long getLastStoragePosition()
                               throws IOException

Throws:

IOException

backupStorageFile

protected void backupStorageFile(String fullPathToStorageFile,
                                 String fullPathToDestinationBackupFile)
                          throws IOException

Description copied from class: AbstractFileMessageStorage

Backups storage file.

Overrides:

backupStorageFile in class AbstractFileMessageStorage

Parameters:

fullPathToStorageFile - the path to file of in/out file

fullPathToDestinationBackupFile - the destination place to backup file

Throws:

IOException

deleteStorageFile

protected void deleteStorageFile(String fullPathToStorageFile)

Description copied from class: AbstractFileMessageStorage

Deletes storage file.

Overrides:

deleteStorageFile in class AbstractFileMessageStorage

Parameters:

fullPathToStorageFile - the path to in/out file

close

public void close()
           throws IOException

Close the storage.

Specified by:

close in interface MessageStorage

Overrides:

close in class AbstractFileMessageStorage

Throws:

IOException - - if I/O error occurred