Using Blobs with MySQL

Hi,
I've posted a few thread semi-related to this, and decided I would just ask a more general question.
Has anyone been able to save (& load) BLOBs in MySQL using ADF BC? If so, how did you do it?

No, its not the same as doing this process with Oracle.
First of all, I cannot use BlobDomain, and instead I have to use something else that implements java.sql.Blob. I would use the one from the mysql driver, but it has private constructors....
So I tried to use SerialBlob, then cast it to java.sql.Blob before committing to the db, and after some efforts I was able to finally save a Blob to my table.
However, every time I try and load the blob again into my Entity Object, I am getting index out of bounds exceptions.
(Even when I inserted a blob using PreparedStatements, then tried to have ADF BC retrieve the blob from the db)

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though i have put jar file of mysql in lib directory and changed the driver name in hibernate.cfg.xml.
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Hi smogura,
Thanks for the message. Ok I did as you told. I believe I went to the right place:
Resource->JDBC Connection pools. However I wasn't sure how exactly to go about setting connection pools,
so I went to the web and did a search and I managed to get hold of this
website:http://www.albeesonline.com/blog/2008/08/06/creating-and-configuring-a-mysql-datasource-in-
glassfish-application-server/
I followed from steps 4 onwards. However at step 14, I did not get a sucesfull ping. The values I used are as follows:
General:
Name:               MySQL
Datasource Classname:     com.mysql.jdbc.jdbc2.optional.MysqlConnectionPoolDataSource
Resource Type:           javax.sql.ConnectionPoolDataSource
Advanced Properties:
databaseName:      ebooking
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password          *****
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add the classpath to the JDBC-driver to the tomcat-
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Using java with mysql JDBC

Hello
I'm trying to write a program which reads in tab-delimeted text files and then stores the results in a mysql database. The files are roughly 20,000 lines long and can have up to 10 columns, so for the biggest files I have 200,000 pieces of data to be stored seperately in the database.
I'm currently using the readLine() method of bufferedreader, then using the split function to seperate the string into tokens. The problem is that it seems to be very slow. It is a lot of information, and im not running it on a very fast machine, but even so im sure there must be a more efficient way of acheiving this.
Here's some of my code:
BufferedReader in = new BufferedReader(new FileReader("test.res"));
while((result = in.readLine()) != null) {
result = in.readLine();
aLine = result.split("\t");
stmt.executeUpdate("INSERT INTO test(words)" + "values('" + aLine[0] +"')");
stmt.executeUpdate("INSERT INTO test(words)" + "values('" + aLine[1] +"')");
stmt.executeUpdate("INSERT INTO test(words)" + "values('" + aLine[2] +"')");
stmt.executeUpdate("INSERT INTO test(words)" + "values('" + aLine[3] +"')");
stmt.executeUpdate("INSERT INTO test(words)" + "values('" + aLine[4] +"')");
stmt.executeUpdate("INSERT INTO test(words)" + "values('" + aLine[5] +"')");
stmt.executeUpdate("INSERT INTO test(words)" + "values('" + aLine[6] +"')");
stmt.executeUpdate("INSERT INTO test(words)" + "values('" + aLine[7] +"')");
stmt.executeUpdate("INSERT INTO test(words)" + "values('" + aLine[8] +"')");
stmt.executeUpdate("INSERT INTO test(words)" + "values('" + aLine[9] +"')");
I would appreciate any advice thanks.
PS this is the first time ive tried anything like this so im probably missing something obvious.

Form the example you have chosen it seems to me, that your table only has one column (words) and that you have multiple value entries for that column in one line of your text file ?!
That is strange. Normaly I would assume (like the other answers indicate) that you have several columns and that each line in your text file has n values each for a different column.
Have look at PreparedStatement.
// the name of your connection is con, you have six columns named col1 to col6 and six entries per line, All six are strings...
PreparedStatement pstmt = con.prepareStatement("insert into test (col1 , col2 , col3,col4,col5,col6) values( ? , ? , ? , ? , ? , ?)") ;
BufferedReader in = new BufferedReader(new FileReader("test.res"));
while((result = in.readLine()) != null) {
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pstmt.executeUpdate() ;
But this is still not the fastest approach. MySQL supports bulk imports
Have look at this feature. Maybe the fastest way is to 'convert' the textfile into something like a MySQL dump an than process it using it the MySQL import features.

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import javax.servlet.*;
import javax.servlet.http.*;
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try {
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Anupam S

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Message was edited by:
snoopy_cz

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regards
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Louise.

>
PoolMan from www.codestudio.com was suggested but that
doesn't seem to exist anymore.
What about this
http://sourceforge.net/projects/poolman

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First you need to make sure that you are using supported configuration. CMP (WebLogic feature) is supported with MySql4 with Connect/J
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