RE: Uploading files to a database
> -Original Message- > From: Jim Barrows > Sent: Friday, August 20, 2004 1:14 PM > To: Struts Users Mailing List > Subject: RE: Uploading files to a database > > > > > > -Original Message- > > From: Ivan Vasquez [mailto:[EMAIL PROTECTED] > > Sent: Friday, August 20, 2004 1:04 PM > > To: [EMAIL PROTECTED] > > Subject: Uploading files to a database > > > > > > Hi, > > > > What's the preferred way to upload files into a database in > a J2EE Web > > application? Jakarta file-upload http://jakarta.apache.org/commons/fileupload/ > > > > Is there any way to stream the file straight from the > > HttpServletRequest > > to the database without staging it in the server's filesystem? \ Answered the second quesiton, not the first... > > Since you have to have the entire file before saving it into > the DB, you either store the entire file in memory, or put it > on the filesystem. > I suppose you could, store the current buffer contents... > read the next buffer full, re-get the field, append the new > buffer to what's in the database, then update it. course, > the only that does is beat the snot out of your database and > the GC, since you still have to have enough memory to store > the whole file in memory, plus bring it across the network > (filesize/buffersize)*2 times. The GC of course would have > to run a lot as well, since you'd be dynamically allocating > 2(filesize/buffersize) buffers. Your network traffic would > be something like 2(filesize/buffersize)buffersize. > So u unless your db has that option, and a JDBC > connector that allowed it... no. > > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Uploading files to a database
We use Struts to Upload files and store them as BLOB's in DB2. We have
code similar to the following:
**FORM**
public void setufile(org.apache.struts.upload.FormFile uFile) {
this.uFile = uFile;
}
private org.apache.struts.upload.FormFile getUFile () {
return uFile;
}
**ACTION**
UploadMessageForm upload = (UploadMessageForm)form;
..more code here for setting up insert...
pstmt = conn.prepareStatement( query );
pstmt.setBinaryStream(1, file.getInputStream()
,file.getInputStream().available() );
pstmt.execute();
The variable "file" is the value returned from upload.getUFile().
Hope this helps.
Daniel
-Original Message-
From: Ivan Vasquez [mailto:[EMAIL PROTECTED]
Sent: Friday, August 20, 2004 1:04 PM
To: [EMAIL PROTECTED]
Subject: Uploading files to a database
Hi,
What's the preferred way to upload files into a database in a J2EE Web
application?
Is there any way to stream the file straight from the HttpServletRequest
to the database without staging it in the server's filesystem?
Thank you,
Ivan.
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Re: Uploading files to a database
Ivan Vasquez schrieb:
Hi,
What's the preferred way to upload files into a database in a J2EE Web
application?
Is there any way to stream the file straight from the HttpServletRequest
to the database without staging it in the server's filesystem?
Thank you,
Ivan.
That's how I use it. But in my case I want to store a file on the
server. But it should be easily possible to put the Stream to CLOB or
something like this.
streamIn = file.getInputStream();
streamOut = new FileOutputStream(fileName);
int bytesRead = 0;
byte[] buffer = new byte[8192];
while ((bytesRead = streamIn.read(buffer, 0, 8192)) != -1) {
streamOut.write(buffer, 0, bytesRead);
}
streamOut.close();
streamIn.close();
file.destroy();
file is a FormFile object which you can use with Struts with the
tag.
Cheers,
Axel
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Re: Uploading files to a database
I think Oracle Intermedia lets you create a BLOB directly from an InputStream. But I prefer to keep my files on the file system and just put meta data about them in the database. If you decide to write to the file system, the example file upload webapp that comes with Struts is nice. It uses jakarta commons file upload libraries behind the scenes, which are also nice. Erik Ivan Vasquez wrote: Hi, What's the preferred way to upload files into a database in a J2EE Web application? Is there any way to stream the file straight from the HttpServletRequest to the database without staging it in the server's filesystem? Thank you, Ivan. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Uploading files to a database
> -Original Message- > From: Ivan Vasquez [mailto:[EMAIL PROTECTED] > Sent: Friday, August 20, 2004 1:04 PM > To: [EMAIL PROTECTED] > Subject: Uploading files to a database > > > Hi, > > What's the preferred way to upload files into a database in a J2EE Web > application? > > Is there any way to stream the file straight from the > HttpServletRequest > to the database without staging it in the server's filesystem? Since you have to have the entire file before saving it into the DB, you either store the entire file in memory, or put it on the filesystem. I suppose you could, store the current buffer contents... read the next buffer full, re-get the field, append the new buffer to what's in the database, then update it. course, the only that does is beat the snot out of your database and the GC, since you still have to have enough memory to store the whole file in memory, plus bring it across the network (filesize/buffersize)*2 times. The GC of course would have to run a lot as well, since you'd be dynamically allocating 2(filesize/buffersize) buffers. Your network traffic would be something like 2(filesize/buffersize)buffersize. So u unless your db has that option, and a JDBC connector that allowed it... no. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Uploading files to a database
Hi, What's the preferred way to upload files into a database in a J2EE Web application? Is there any way to stream the file straight from the HttpServletRequest to the database without staging it in the server's filesystem? Thank you, Ivan. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
