File dwonload from blob

Question

ADF 11g R2, ADF BC
Hello
I have a file uploaded to the DB as a blob column.
I am now trying to download it.
I've followed the smuen' example from 'Not yet dcoumented' sample #85: the code like :
package olfms.view.backing;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;
import javax.servlet.http.HttpServletResponse;
import olfms.view.util.EL;
import oracle.adf.view.rich.component.rich.data.RichTable;
import oracle.binding.OperationBinding;
import oracle.jbo.Row;
import oracle.jbo.domain.BlobDomain;
import oracle.jbo.uicli.binding.JUCtrlHierNodeBinding;
import olfms.view.util.MimeTypes;
public class downloadBean {
private RichTable t2;
public downloadBean() {
public void setT2(RichTable t2) {
this.t2 = t2;
public RichTable getT2() {
return t2;
public void onDownload(FacesContext facesContext,
OutputStream outputStream) throws IOException {
JUCtrlHierNodeBinding f =
(JUCtrlHierNodeBinding)this.t2.getSelectedRowData();
Row row = f.getRow();
BlobDomain file = (BlobDomain)row.getAttribute("StoredFile");
String fileName = row.getAttribute("FileName").toString();
ExternalContext extContext = facesContext.getExternalContext();
Long length = file.getLength();
String fileType = MimeTypes.getMimeType(fileName);
HttpServletResponse response = (HttpServletResponse) extContext.getResponse();
response.setHeader("Content-Disposition", "attachment;filename=\"" + fileName + "\"");
response.setContentLength((int) length.intValue());
response.setContentType( fileType );
InputStream in = file.getBinaryStream();
OutputStream out = response.getOutputStream();
byte[] buf = new byte[1024];
int count;
while ((count = in.read(buf)) >= 0) {
out.write(buf, 0, count);
in.close();
out.flush();
out.close();
facesContext.responseComplete();
OperationBinding refresh =
(OperationBinding)EL.get("#{bindings.Execute1}");
Whats happening is the first time I click on the filename the file is downloaded from the DB correctly. but if I click the same file again, only empty file I get. What happend to this problem. Thanks!!!!
have solved it to add line. " file.closeInputStream();"
Edited by: xsyang on Aug 2, 2011 2:16 AM

Answer 1

After closing the input stream call
in.close();
out.flush();
out.close();
file .closeInputStream();
...to clean up the BlobDomain.
Timo