org.directwebremoting.impl
Class PurgingDownloadManager

java.lang.Object
  org.directwebremoting.impl.PurgingDownloadManager

All Implemented Interfaces:

DownloadManager

Direct Known Subclasses:

FileStoreDownloadManager, InMemoryDownloadManager

public abstract class PurgingDownloadManager
extends java.lang.Object
implements DownloadManager

A DownloadManager that simply stores downloads in memory until they are requested and then removes them.

Author:

Joe Walker [joe at getahead dot ltd dot uk]

Nested Class Summary

class

PurgingDownloadManager.DownloadPurge Loop over the known downloads removing the ones that are out of date

Constructor Summary

PurgingDownloadManager()
Schedule cache purges

Method Summary

java.lang.String	addFile(FileGenerator generator) Inject a file into the system for later download.
FileGenerator	getFile(java.lang.String id) Retrieve a file previously injected into the system with DownloadManager.addFile(FileGenerator)
void	setDownloadHandlerUrl(java.lang.String downloadHandlerUrl) The URL part which we attach to the downloads.
void	setPurgeDownloadsAfter(long purgeDownloadsAfter)

Methods inherited from class java.lang.Object

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

Constructor Detail

PurgingDownloadManager

public PurgingDownloadManager()

Schedule cache purges

Method Detail

addFile

public java.lang.String addFile(FileGenerator generator)
                         throws java.io.IOException

Description copied from interface: DownloadManager

Inject a file into the system for later download.

Specified by:

addFile in interface DownloadManager

Parameters:

generator - The representation of the file to inject

Returns:

A URL for how to allow download of this data at a later time

Throws:

java.io.IOException - If there are problems reading from the FileGenerator

getFile

public FileGenerator getFile(java.lang.String id)

Description copied from interface: DownloadManager

Retrieve a file previously injected into the system with DownloadManager.addFile(FileGenerator)

Specified by:

getFile in interface DownloadManager

Parameters:

id - The id of the FileGenerator to retrieve

setDownloadHandlerUrl

public void setDownloadHandlerUrl(java.lang.String downloadHandlerUrl)

The URL part which we attach to the downloads.

Parameters:

downloadHandlerUrl - The URL for this Handler.

setPurgeDownloadsAfter

public void setPurgeDownloadsAfter(long purgeDownloadsAfter)

Parameters:

purgeDownloadsAfter - the purgeDownloadsAfter to set