Transactional Files in Java - by Ganotis Ioannis

Hi,
I am happy to announce the release of the "Transactional Files in Java" project.
Using this project means there is no need any more to provide transactional support manually which results in mixing-up business logic with transaction related code.
The project provides you with a library which can be used to have access to both files and directories transactionally (offering ACID semantics). The library also gives you the powerful feature of recovering from failures, as in our days there is no guarantee that software or hardware of systems never fail.
For more information on the library and how it can be used follow the link below:
[http://www.jboss.org/jbosstm/fileio/] .
You will also find links to run the provided demo applications on that page.
For more discussion on the project check this [forum topic|http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4173688#4173688].
All comments are welcome.
Cheers,
I. Ganotis
[http://iganotis.blogspot.com/]

Thanks a lot
It's working now

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Hi Tanaya,
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Ah, sorry, strike that. You want multiple files. I think the easiest way is to simply parse with DOM. [http://www.w3schools.com/xpath/default.asp] . And here [http://www.w3schools.com/xpath/default.asp].
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Hello,
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How to read Excel file in java

Respected sir/madam
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This is the code what i have written
import java.io.*;
import java.sql.*;
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Connection c;
Statement stmnt;
public void checkABA_Number()
try
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
c = DriverManager.getConnection("jdbc:odbc:ExcelTest","",""); // ExcelTest is the DSN name
stmnt = c.createStatement();
ResultSet rs = stmnt.executeQuery("select * from abadata"); // abadata is my Excel file name
while(rs.next())
System.out.println(rs.getString(1)+" "+rs.getString(2));
}catch(Exception e)
System.out.println(""+e.toString());
finally
try
stmnt.close();
c.close();
catch( Exception e )
System.err.println( e );
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new ReadExcelFile().checkABA_Number();
My Excel file starts from the first row and first column and also the first row contains the names of the column.
It give me the following error..
java.sql.SQLException: [Microsoft][ODBC Excel Driver] The Microsoft Jet database engine could not find the object 'abadata'. Make sure the object exists and that you spell its name and the path name correctly.
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here is the code to read excel file
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Connection c = null;
Statement stmnt = null;
try
Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver" );
c = DriverManager.getConnection("jdbc:odbc:Driver={Microsoft Excel Driver (*.xls)};DBQ=" + filename);
stmnt = c.createStatement();
String query = "Select * from [Sheet1$]" ;
ResultSet rs = stmnt.executeQuery( query );
while( rs.next() )
System.out.println( rs.getString(1) );
catch( Exception e )
System.err.println( e );
}

Executing batch file from Java stored procedure hang

Dears,
I'm using the following code to execute batch file from Java Stored procedure, which is working fine from Java IDE JDeveloper 10.1.3.4.
public static String runFile(String drive)
String result = "";
String content = "echo off\n" + "vol " + drive + ": | find /i \"Serial Number is\"";
try {
File directory = new File(drive + ":");
File file = File.createTempFile("bb1", ".bat", directory);
file.deleteOnExit();
FileWriter fw = new java.io.FileWriter(file);
fw.write(content);
fw.close();
// The next line is the command causing the problem
Process p = Runtime.getRuntime().exec("cmd.exe /c " + file.getPath());
BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line;
while ((line = input.readLine()) != null)
result += line;
input.close();
file.delete();
result = result.substring( result.lastIndexOf( ' ' )).trim();
} catch (Exception e) {
e.printStackTrace();
result = e.getClass().getName() + " : " + e.getMessage();
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The above code is used in getting the volume of a drive on windows, something like "80EC-C230"
I gave the SYSTEM schema the required privilege to execute the code.
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EXEC DBMS_JAVA.grant_permission('SYSTEM', 'SYS:java.lang.RuntimePermission', 'readFileDescriptor', '');
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I have used the following to load the class in Oracle 9ir2 DB:
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[http://oracle.ittoolbox.com/groups/technical-functional/oracle-jdeveloper-l/run-an-exe-file-using-oracle-database-trigger-1567662]
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Dear Peter,
You are totally right, I got this as mistake copy paste. I'm just having a Java utility for running external files outside Oracle DB, this is the method runFile()
I'm passing it the content of script and names of file to be created on the fly and executed then deleted, sorry for the mistake in creating caller function.
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The function script is running perfect if I'm executing vbs script outside Oracle using something like "cscript //NoLogo aaa1.vbs", but when I use the command line the call just never returns to me "cmd.exe /c bb1.bat".
where content of bb1.bat as follows:
echo off
vol C: | find /i "Serial Number is"
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Same code runs outside Oracle just fine, but inside Oracle doesn't return if I exectued the following:
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call A1( 'C' ) into :serial1;
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Thanks for tracing teh issue to that details ;) hope you coul help.

JNI Invocation: open file in Java, write file in CPP

Hello,
Warning: I am a dunce, bad CPP code ahead!
Using JNI invocation, I am trying to read a binary file in Java and write it in CPP.
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TIA to any help,
kirst
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Hello,
Me again. Well, not such a dunce after all. Here is code that works correctly, and compiles with no errors and no warnings.
Will much appreciate help with clean-up code.
TIA,
kirst
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(begin ByteMe.cpp)
          Signature obtained with command:
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                 Signature: (Ljava/lang/String;)[B
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#include <string.h>
#include <jni.h>
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     destroy:
         if (env->ExceptionOccurred())
            env->ExceptionDescribe();
    jvm->DestroyJavaVM();
}(end ByteMe.cpp)

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import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
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     public static void write(File file) throws IOException {
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hello,
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my id is [email protected]

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