Package com.illumon.iris.db.util.file

Class FileHandleAccessor

java.lang.Object

com.illumon.iris.db.util.file.FileHandleAccessor

Direct Known Subclasses:

LocalFileAccessor, TrackedSeekableByteChannel

public abstract class FileHandleAccessor
extends Object

Base class for accessors that wrap a FileHandle with support for interruption and asynchronous close.

Field Summary

Fields

Modifier and Type	Field	Description
protected final File	file
protected FileHandle	fileHandle

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	FileHandleAccessor(FileHandleFactory.FileToHandleFunction fileHandleCreator, File file)	Create an accessor that gets handles for file from fileHandleCreator.

Method Summary

Modifier and Type	Method	Description
protected final FileHandle	refreshFileHandle(FileHandle previousLocalHandle)	Replace the file handle with a new one if the closed handle passed in is still current, and return the (possibly changed) current value.

Methods inherited from class java.lang.Object

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

Field Details

file

protected final File file

fileHandle

protected volatile FileHandle fileHandle

Constructor Details

FileHandleAccessor

protected FileHandleAccessor(@NotNull
 FileHandleFactory.FileToHandleFunction fileHandleCreator,
 @NotNull
 File file)

Create an accessor that gets handles for file from fileHandleCreator.

Parameters:

fileHandleCreator - The function used to make file handles

file - The abstract path name to access

Method Details

refreshFileHandle

protected final FileHandle refreshFileHandle(FileHandle previousLocalHandle)

Replace the file handle with a new one if the closed handle passed in is still current, and return the (possibly changed) current value.

Parameters:

previousLocalHandle - The closed handle that calling code would like to replace

Returns:

The current file handle, possibly newly created