com.atlassian.confluence.servlet.download
Class ServeAfterTransactionDownload

java.lang.Object
  com.atlassian.confluence.servlet.download.ServeAfterTransactionDownload

All Implemented Interfaces:

com.atlassian.plugin.servlet.DownloadStrategy

Direct Known Subclasses:

AttachmentDownload, ExportDownload, ResourceDownload

public abstract class ServeAfterTransactionDownload
extends java.lang.Object
implements com.atlassian.plugin.servlet.DownloadStrategy

This abstract download strategy allows implementors to gather necessary information from a database and set HTTP headers within a database transaction. Streaming of the actual download is done after the transaction is finished so that the database connection lifetime is not bound to the entire request lifetime.

Nested Class Summary

protected class

ServeAfterTransactionDownload.StreamResultCallback Spring transactional callback that calls getStreamForDownload within a database transaction

Constructor Summary

ServeAfterTransactionDownload()

Method Summary

static java.lang.String	getDecodedPathInfo(javax.servlet.http.HttpServletRequest httpServletRequest)
protected abstract java.io.InputStream	getStreamForDownload(javax.servlet.http.HttpServletRequest httpServletRequest, javax.servlet.http.HttpServletResponse httpServletResponse) Get the input stream to serve to the client outside of the database transaction.
protected org.springframework.transaction.support.TransactionCallback	getStreamResultCallback(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
void	serveFile(com.atlassian.plugin.servlet.BaseFileServerServlet baseFileServerServlet, javax.servlet.http.HttpServletRequest httpServletRequest, javax.servlet.http.HttpServletResponse httpServletResponse)
void	setTransactionManager(org.springframework.transaction.PlatformTransactionManager transactionManager)

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.atlassian.plugin.servlet.DownloadStrategy

matches

Constructor Detail

ServeAfterTransactionDownload

public ServeAfterTransactionDownload()

Method Detail

setTransactionManager

public void setTransactionManager(org.springframework.transaction.PlatformTransactionManager transactionManager)

getDecodedPathInfo

public static java.lang.String getDecodedPathInfo(javax.servlet.http.HttpServletRequest httpServletRequest)

serveFile

public final void serveFile(com.atlassian.plugin.servlet.BaseFileServerServlet baseFileServerServlet,
                            javax.servlet.http.HttpServletRequest httpServletRequest,
                            javax.servlet.http.HttpServletResponse httpServletResponse)
                     throws java.io.IOException

Specified by:

serveFile in interface com.atlassian.plugin.servlet.DownloadStrategy

Throws:

java.io.IOException

getStreamResultCallback

protected org.springframework.transaction.support.TransactionCallback getStreamResultCallback(javax.servlet.http.HttpServletRequest request,
                                                                                              javax.servlet.http.HttpServletResponse response)

getStreamForDownload

protected abstract java.io.InputStream getStreamForDownload(javax.servlet.http.HttpServletRequest httpServletRequest,
                                                            javax.servlet.http.HttpServletResponse httpServletResponse)
                                                     throws java.io.IOException

Get the input stream to serve to the client outside of the database transaction. The inputstream must be useable outside of the database transaction that created it

Parameters:

httpServletRequest -

httpServletResponse -

Returns:

The input stream to serve, or null if nothing to serve.

Throws:

java.io.IOException