org.apache.commons.fileupload.disk
Class DiskFileItemFactory

java.lang.Object
  extended by org.apache.commons.fileupload.disk.DiskFileItemFactory
All Implemented Interfaces:
FileItemFactory
Direct Known Subclasses:
DefaultFileItemFactory

public class DiskFileItemFactory
extends Object
implements FileItemFactory

The default FileItemFactory implementation. This implementation creates FileItem instances which keep their content either in memory, for smaller items, or in a temporary file on disk, for larger items. The size threshold, above which content will be stored on disk, is configurable, as is the directory in which temporary files will be created.

If not otherwise configured, the default configuration values are as follows:

Temporary files, which are created for file items, should be deleted later on. The best way to do this is using a FileCleaningTracker, which you can set on the DiskFileItemFactory. However, if you do use such a tracker, then you must consider the following: Temporary files are automatically deleted as soon as they are no longer needed. (More precisely, when the corresponding instance of File is garbage collected.) This is done by the so-called reaper thread, which is started automatically when the class FileCleaner is loaded. It might make sense to terminate that thread, for example, if your web application ends. See the section on "Resource cleanup" in the users guide of commons-fileupload.

Since:
FileUpload 1.1
Version:
$Id: DiskFileItemFactory.java 735374 2009-01-18 02:18:45Z jochen $
Author:
Martin Cooper

Field Summary
static int DEFAULT_SIZE_THRESHOLD
          The default threshold above which uploads will be stored on disk.
 
Constructor Summary
DiskFileItemFactory()
          Constructs an unconfigured instance of this class.
DiskFileItemFactory(int sizeThreshold, File repository)
          Constructs a preconfigured instance of this class.
 
Method Summary
 FileItem createItem(String fieldName, String contentType, boolean isFormField, String fileName)
          Create a new DiskFileItem instance from the supplied parameters and the local factory configuration.
 org.apache.commons.io.FileCleaningTracker getFileCleaningTracker()
          Returns the tracker, which is responsible for deleting temporary files.
 File getRepository()
          Returns the directory used to temporarily store files that are larger than the configured size threshold.
 int getSizeThreshold()
          Returns the size threshold beyond which files are written directly to disk.
 void setFileCleaningTracker(org.apache.commons.io.FileCleaningTracker pTracker)
          Sets the tracker, which is responsible for deleting temporary files.
 void setRepository(File repository)
          Sets the directory used to temporarily store files that are larger than the configured size threshold.
 void setSizeThreshold(int sizeThreshold)
          Sets the size threshold beyond which files are written directly to disk.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

DEFAULT_SIZE_THRESHOLD

public static final int DEFAULT_SIZE_THRESHOLD
The default threshold above which uploads will be stored on disk.

See Also:
Constant Field Values
Constructor Detail

DiskFileItemFactory

public DiskFileItemFactory()
Constructs an unconfigured instance of this class. The resulting factory may be configured by calling the appropriate setter methods.


DiskFileItemFactory

public DiskFileItemFactory(int sizeThreshold,
                           File repository)
Constructs a preconfigured instance of this class.

Parameters:
sizeThreshold - The threshold, in bytes, below which items will be retained in memory and above which they will be stored as a file.
repository - The data repository, which is the directory in which files will be created, should the item size exceed the threshold.
Method Detail

getRepository

public File getRepository()
Returns the directory used to temporarily store files that are larger than the configured size threshold.

Returns:
The directory in which temporary files will be located.
See Also:
setRepository(java.io.File)

setRepository

public void setRepository(File repository)
Sets the directory used to temporarily store files that are larger than the configured size threshold.

Parameters:
repository - The directory in which temporary files will be located.
See Also:
getRepository()

getSizeThreshold

public int getSizeThreshold()
Returns the size threshold beyond which files are written directly to disk. The default value is 10240 bytes.

Returns:
The size threshold, in bytes.
See Also:
setSizeThreshold(int)

setSizeThreshold

public void setSizeThreshold(int sizeThreshold)
Sets the size threshold beyond which files are written directly to disk.

Parameters:
sizeThreshold - The size threshold, in bytes.
See Also:
getSizeThreshold()

createItem

public FileItem createItem(String fieldName,
                           String contentType,
                           boolean isFormField,
                           String fileName)
Create a new DiskFileItem instance from the supplied parameters and the local factory configuration.

Specified by:
createItem in interface FileItemFactory
Parameters:
fieldName - The name of the form field.
contentType - The content type of the form field.
isFormField - true if this is a plain form field; false otherwise.
fileName - The name of the uploaded file, if any, as supplied by the browser or other client.
Returns:
The newly created file item.

getFileCleaningTracker

public org.apache.commons.io.FileCleaningTracker getFileCleaningTracker()
Returns the tracker, which is responsible for deleting temporary files.

Returns:
An instance of FileCleaningTracker, or null (default), if temporary files aren't tracked.

setFileCleaningTracker

public void setFileCleaningTracker(org.apache.commons.io.FileCleaningTracker pTracker)
Sets the tracker, which is responsible for deleting temporary files.

Parameters:
pTracker - An instance of FileCleaningTracker, which will from now on track the created files, or null (default), to disable tracking.


Copyright © 2002-2010 The Apache Software Foundation. All Rights Reserved.