io.aeron.driver.buffer

Class FileStoreLogFactory

java.lang.Object

io.aeron.driver.buffer.FileStoreLogFactory

All Implemented Interfaces:

LogFactory, AutoCloseable

public class FileStoreLogFactory
extends Object
implements LogFactory

Factory for creating RawLogs in the source publications or publication images directories as appropriate.

Constructor Summary

Constructors

Constructor and Description
FileStoreLogFactory(String dataDirectoryName, int filePageSize, boolean checkStorage, long lowStorageWarningThreshold, ErrorHandler errorHandler, AtomicCounter mappedBytesCounter) Construct a LogFactory over a file store.

Method Summary

Modifier and Type	Method and Description
void	close()
RawLog	newImage(long correlationId, int termBufferLength, boolean useSparseFiles) Create new RawLog in the rebuilt publication images directory for the supplied triplet.
RawLog	newPublication(long correlationId, int termBufferLength, boolean useSparseFiles) Create new RawLog in the publications' directory for the supplied triplet.

Methods inherited from class java.lang.Object

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

Constructor Detail

FileStoreLogFactory

public FileStoreLogFactory(String dataDirectoryName,
                           int filePageSize,
                           boolean checkStorage,
                           long lowStorageWarningThreshold,
                           ErrorHandler errorHandler,
                           AtomicCounter mappedBytesCounter)

Construct a LogFactory over a file store.

Parameters:

dataDirectoryName - where the log buffers will be created.

filePageSize - of the filesystem.

checkStorage - for sufficient space before allocating files.

lowStorageWarningThreshold - when warnings about remaining space will begin.

errorHandler - to call when an error is encountered.

mappedBytesCounter - used to keep track of how many bytes are mapped by the driver.

Method Detail

close

public void close()

Specified by:

close in interface LogFactory

Specified by:

close in interface AutoCloseable

newPublication

public RawLog newPublication(long correlationId,
                             int termBufferLength,
                             boolean useSparseFiles)

Create new RawLog in the publications' directory for the supplied triplet.

Specified by:

newPublication in interface LogFactory

Parameters:

correlationId - to use to distinguish this publication

termBufferLength - length of each term

useSparseFiles - for the log buffer.

Returns:

the newly allocated RawLog

newImage

public RawLog newImage(long correlationId,
                       int termBufferLength,
                       boolean useSparseFiles)

Create new RawLog in the rebuilt publication images directory for the supplied triplet.

Specified by:

newImage in interface LogFactory

Parameters:

correlationId - to use to distinguish this connection

termBufferLength - to use for the log buffer

useSparseFiles - for the log buffer.

Returns:

the newly allocated RawLog