Writing to BLOB with getBinaryOutputStream

I'm trying to insert a BLOB and have problems with a variety of the methods listed in documentation.
1) The method that is in the Oracle examples, oracle.sql.BLOB.getBinaryOutputStream(), give me a warning that it is deprecated.
2) In other Oracle documentation, getBinaryOutputStream(long) is specified, but that doesn't exist in my version of oracle.sql.BLOB.
3) Yet other documentation says to use the JDBC 3.0 standard call, which is setBinaryStream(long). However, I get this error when running it: java.lang.AbstractMethodError: java.io.OutputStream oracle.sql.BLOB.setBinaryStream(long)
I don't want to use the deprecated method, but that's the only one that works. Any ideas?
Using 10g driver with an 8i database.
thanks

Iâm not sure how to use PreparedStatement.setBlob(Blob). Seems like the only way to create a BLOB is to SELECT it, and then you still need to call BLOB.setXXX. I tried setBytes(..) but get the same AbstractMethodError as with setBinaryStream(..)
Hereâs the stacktrace from JDev, not sure it has what you're looking for. In this scenario, I use a PreparedStatement to create a blob locator using this:
String CREATE_STATEMENT = "INSERT INTO IWR_FILE " +
"(SA_FILE, SA_IWR, FILE_NAME, FILE_BLOB) VALUES " +
"( ?, ?, ?, empty_blob())";
I then select that record and try to write the blob using:
(imported oracle.sql.BLOB)
ResultSet blobRS = blobPS.executeQuery();
BLOB blob = (BLOB) blobRS.getBlob(1);
OutputStream blobOUT = blob.setBinaryStream(1L);
Tried casting the ResultSet to an OracleResultSet, but still got the error.
com.evermind.server.rmi.OrionRemoteException: Transaction was rolled back: java.lang.AbstractMethodError: java.io.OutputStream oracle.sql.BLOB.setBinaryStream(long)      at IWRFacade_StatelessSessionBeanWrapper0.setDTOList(IWRFacade_StatelessSessionBeanWrapper0.java:621)      at iwr.ejb.beans.Tester.testFileDAO(Tester.java:117)      at iwr.ejb.beans.Tester.main(Tester.java:47)      at mypackage7.InitiatorServlet.init(InitiatorServlet.java:27)      at com.evermind.server.http.HttpApplication.loadServlet(HttpApplication.java:2094)      at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:4523)      at com.evermind.server.http.HttpApplication.getRequestDispatcher(HttpApplication.java:2413) 04/08/30 09:49:04 com.evermind.server.rmi.OrionRemoteException: Transaction was rolled back: java.lang.AbstractMethodError: java.io.OutputStream oracle.sql.BLOB.setBinaryStream(long); nested exception is:
     java.rmi.RemoteException: java.io.OutputStream oracle.sql.BLOB.setBinaryStream(long); nested exception is:
     java.lang.AbstractMethodError: java.io.OutputStream oracle.sql.BLOB.setBinaryStream(long)      at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:640)      at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:270)      at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:112)      at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:186)      at java.lang.Thread.run(Thread.java:534)      Nested exception is: java.rmi.RemoteException: java.io.OutputStream oracle.sql.BLOB.setBinaryStream(long); nested exception is:
     java.lang.AbstractMethodError: java.io.OutputStream oracle.sql.BLOB.setBinaryStream(long)      at com.evermind.server.ejb.EJBUtils.makeException(EJBUtils.java:941)      at IWRFacade_StatelessSessionBeanWrapper0.setDTOList(IWRFacade_StatelessSessionBeanWrapper0.java:621)      at iwr.ejb.beans.Tester.testFileDAO(Tester.java:117)      at iwr.ejb.beans.Tester.main(Tester.java:47)      at mypackage7.InitiatorServlet.init(InitiatorServlet.java:27)      at com.evermind.server.http.HttpApplication.loadServlet(HttpApplication.java:2094)      at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:4523)      at com.evermind.server.http.HttpApplication.getRequestDispatcher(HttpApplication.java:2413)      at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:640)      at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:270)      at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:112)      at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:186)      at java.lang.Thread.run(Thread.java:534) Caused by: java.lang.AbstractMethodError: java.io.OutputStream oracle.sql.BLOB.setBinaryStream(long)      at iwr.ejb.dao.FileDAO.getInsertPS(FileDAO.java:244)      at iwr.ejb.dao.FileDAO.setDTO(FileDAO.java:90)      at iwr.ejb.beans.IWRFacadeBean.setDTOList(IWRFacadeBean.java:102)      at IWRFacade_StatelessSessionBeanWrapper0.setDTOList(IWRFacade_StatelessSessionBeanWrapper0.java:564)      ... 11 more

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oracle.sql.BLOB blobDest = (oracle.sql.BLOB) ((OracleResultSet) resultSet).getBlob(2);
byte[] buffer = new byte[ blobDest.getBufferSize() ];
OutputStream outputStream = blobDest.getBinaryOutputStream();
int length = -1;
while ((length = inputStream.read(buffer)) != -1) {
outputStream.write(buffer,0,length);
outputStream.flush();
statement.close();
outputStream.close();
inputStream.close();
resultSet.close();
Hope it's help
best regards
sschoenig

Writing multiple BLOB (PDF) records into one PDF file

I currently have a procedure that writes an individual BLOB pdf row and outputs it to a PDF file, however I would like to write multiple BLOB rows into one PDF.
Oracle version:10g R2.
Does anyone know whether it is possible to do this?
Here is my code, I was hoping to use a cursor FOR LOOP to read the BLOB records. The BLOB records do successfully load into a new PDF file, however when you open it the PDF only the first page is viewable. I am assuming the issue is to do with the PDF format rather than writing the data out to the file. I.e. the Page numbers etc.., incorrect formatting of the PDF?
declare
-- Test statements here
b BLOB;
amount BINARY_INTEGER;
file_handle UTL_FILE.FILE_TYPE;
l_pos INTEGER := 1;
l_blob_len INTEGER;
l_buffer RAW (32767);
l_amount BINARY_INTEGER := 32767;
file_name_ VARCHAR2(200);
pattern_id_ VARCHAR2(200) := '5555555';
pdf_path_ VARCHAR2(200) := 'PDF_OUT';
cursor get_blob_recs is
select pdf from mds_remote_pdf_tmp;
BEGIN
file_name_ := to_char(pattern_id_)||'.PDF';
file_handle := UTL_FILE.FOPEN(pdf_path_,file_name_,'wb');
FOR rec_ IN get_blob_recs LOOP
l_blob_len := DBMS_LOB.getlength (rec_.pdf);
l_pos := 1;
WHILE l_pos < l_blob_len
LOOP
DBMS_LOB.READ (rec_.pdf, l_amount, l_pos, l_buffer);
UTL_FILE.put_raw (file_handle, l_buffer, FALSE);
l_pos := l_pos + l_amount;
END LOOP;
END LOOP;
UTL_FILE.FCLOSE(file_handle);
end;
Any advice would be greatly appreciated.
Regards,
David.

I guessed there was more to a PDF file format than just amending the BLOB objects!. I think I'll have to create a function with an IN param containing the PDF file list, and invoke a Java class to merge the PDFs in the OS.
My requirement is to record the history of when a hand written form was completed. E.g. a user might complete half a document one day, and the rest of the document another day, therefore I want one PDF with two pages of the same form at different stages of completion. These forms are currently being created as two separate PDFs, and the problem is I am restricted to displaying only one PDF!
Thank you.
David.
Edited by: david.massey on Jan 26, 2011 8:16 AM

ITunes re-writing id3 tags with deleted / edited information

Help I think I'm going insane. I keep my iTunes music folder on a LaCie 160 gig Rugged drive. iTunes keeps on re-writing id3 tags on certain files with information I have previously deleted or changed. This info auto fills as soon as I play the file again. I'm not using any other application to change tags.
Also if I reset the music library location and then put it back to the external drive it finds loads of new files without me adding.
Any idea what is going on here? Totally confused. Ghost in the system! Is it cofusing 2 databases? There's only 1 iTunes library file in the folder.

There is a setting in iTunes.
'Automatically download missing album artwork'. In the past that interfered with anything not being complete. Is it switched on?
The second reason is when you get MP3 files from a PC and the details were added through XP itself, updating it in Winamp would give all kinds of problems, perhaps a similar thing is happening here.
There is no real solution. The only solution that worked in my past was to clean out the details and enter them again, but NOT through the file manager of XP.

Writing to socket with setinterval not working in windows

Hello Everyone,
I'm trying to stream a big file to my server, and was using 'setInterval' just fine to slowly upload it from OS X, but when I moved my AIR application to a Windows Vista computer, it no longer worked. I started doing some investigation and found out that 'socket.writeBytes' function was not working inside of 'setInterval'. I then moved the code inside of 'setInterval' to outside of it and everythink worked, but obviously it was no longer streaming. Thinking there was something wrong with 'setInterval', I tried it without the 'socket.writeBytes' function in it, and it started working fine.
Not sure what is happening, but it seems like a bug in the air.Socket code.
Here is my code:
    var socket = new air.Socket();
    socket.addEventListener(air.Event.CONNECT, function(e) {
        var stream = setInterval(function() {
               socket.writeBytes(filePart, 0, filePart.length);
                if (isDone) {
                    clearInterval(stream);
        }, 1000);
    socket.connect("myServer", 80);
P.S. I also tried using 'air.Timer' and it was the same behavior as 'setInterval'.
Thanks for any help.

Hi,
You should use the flush method:
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/net/Socket.html#f lush%28%29
"Flushes any accumulated data in the socket's output buffer.
On some operating systems, flush() is called automatically between execution frames, but on other operating systems, such as Windows, the data is never sent unless you call flush() explicitly. To ensure your application behaves reliably across all operating systems, it is a good practice to call the flush() method after writing each message (or related group of data) to the socket."
I hope this helps!
-Erica

Reading and Writing to blob column is very slow

Hi
I want to write a serialized java object called 'engine' to a database table called javaObjectsDB. The serialized object could be of sizes anywhere between 20MB to 4GB. I am using the following code to write this 'engine' object
               * Write java object to BLOB in DB - Start
               Connection conn=null;
               conn = Util.getConnectionFromDS();
          PreparedStatement ps=null;
          String sql=null;
               Engine.startWatch();
               ByteArrayOutputStream baos = new ByteArrayOutputStream();
               Engine.endWatch("Time for ByteArrayOutputStream");
               Engine.startWatch();
               ObjectOutputStream oos = new ObjectOutputStream(baos);
               Engine.endWatch("Time for ObjectOutputStream");
               Engine.startWatch();
               oos.writeObject(this.engine_);
               Engine.endWatch("Time for oos.writeObject");
               oos.flush();
               Engine.startWatch();
               byte[] data = baos.toByteArray(); // in case of using ByteArrayOutputStream
               Engine.endWatch("Time for toByteArray");
               Engine.startWatch();
     sql="insert into javaObjectsDB values (?)";
     ps=conn.prepareStatement(sql);
     ps.setObject(1, data); // in case of using ByteArrayOutputStream
     ps.executeUpdate();
     Engine.endWatch("Time for prepare statement and insert");
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To read from database BLOB column back to the engine object I use the following code:
try {
               String readBlob = "SELECT javaObject FROM javaObjectsDB ";
               Statement readBlobStmt = conn.createStatement();
               ResultSet resultSet = readBlobStmt.executeQuery(readBlob);
               while (resultSet.next()) {
                    * ByteArrayStream *** Start
                    Engine.startWatch();
                    Blob blob = resultSet.getBlob(1);
                    Engine.endWatch("loadPlan::Time for getBlob");
                    Engine.startWatch();
                    byte [] data = blob.getBytes(1,(int)blob.length());
                    Engine.endWatch("loadPlan::Time for getBytes");
                    Engine.startWatch();
               ByteArrayInputStream bais = new ByteArrayInputStream(data);
               Engine.endWatch("loadPlan::Time for ByteArrayInputStream");
               Engine.startWatch();
               ObjectInputStream oin = new ObjectInputStream(bais);
               Engine.endWatch("loadPlan::Time for ObjectInputStream");
               Engine.startWatch();
               engine_ = (Engine)oin.readObject();
               Engine.endWatch("loadPlan::Time for oin.readObject");
               System.out.println("engine object prepared");
                    * ByteArrayStream *** End
               } //while of result Set
The time taken to write and read for a engine object of size 124MB are:
write - 41secs
read - 28secs
For a engine object of size 340MB
write - 3minutes
read - 1minute
This is a lot of time for such small object size, and since we are expecting sizes of 4GB, I need to have better performance. Please suggest what I can do to improve performance for read and write.
One thing I tried was using cached lobs but not of much use.

Welcome to the forum!
Unfortunately this is an Oracle forum and your question should be posted in the Java JDBC forum.
https://forums.oracle.com/forums/category.jspa?categoryID=288
Please create a question on the JDBC forum, post a link to that new question here, in this forum, and mark this question answered.
That way anyone seeing this question can followup with you in the other forum.
Thanks.

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