Setting Windows Envirnoment variables within Java code!!

Hello All,
How to setup Windows envirnoment variables within Java code dynamically.
int customer = jList1.getSelectedIndex();
System.out.println(customer);
switch (customer)
case 0:
System.out.println("HOME1");
break;
case 1:
System.out.println("HOME2");
break;
case 2:
System.out.println("HOME3");
break;
case 3:
System.out.println("HOME4");
break;
default:
System.out.println("HOME5");
break;
}

set windows %HOME% variableWhat is it?
A system-wide resource? Something pertinent to the processes of a given user? Or does it apply only to your Java process?

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Setting windows environment variables from Java program

Is there any way to set environment variables from Java program in Windows? Any help is appreciated.
Here is my situation:
I need to decrypt an encrypted Oracle user password in a batch file which will be used while running a sql script with sqlplus. I was planning to have bat file which will call a Java program decrypt the password and set it as an env variable in windows which will be available while calling sqlplus.
thanks

Runtime.exec has a lot of overloadings. Two of them
allows you to specify the environment variables.
exec
public Process exec(String[] cmdarray,
String[] envp,
File dir)
throws IOExceptionExecutes the specified command and
arguments in a separate process with the specified
environment and working directory.
cmdarray - array containing the command to call and
its arguments.
envp - array of strings, each element of which has
environment variable settings in format name=value.
dir - the working directory of the subprocess, or null
if the subprocess should inherit the working directory
of the current process.
I had this sample program:
public class SetVarExample {
public static void main (String[] args) throws Exception {
     String[] cmd_env= new String[] {"password="+"ABCD","Path=C:\\Sun\\AppServer\\jdk\\bin"};
     String cmd = "cmd /c SET ";
     Runtime.getRuntime().exec(cmd,cmd_env);
System.out.println( "Finish ...." );
I tried it in a command prompt. But looks like when the program exits, it's a whole new process and so it does not retain the env variables set in the java program.
Any suggestions? Am I doing it worng?
thanks

Start weblogic server within java code

From edoc.bea.com, I got:
====
The following sections describe alternate ways to start an Administration Server:
Starting an Administration Server from the Windows Start Menu
Starting an Administration Server When the Host Computer Boots
Starting an Administration Server With the java weblogic.Server Command
====
Could we start weblogic server within java code?
(like ServerLoader provided by JBoss?)
Thanks in advance.
-Kevin

The follwoing code:
//====
import weblogic.*;
public class MyTest
public static void main(String[] args)
          String[] myArgs = new String[6];
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//====
Seems that did not feed the arguments in:
C:\myTest>java -cp .;%CLASSPATH% MyTest
<Sep 22, 2005 6:08:40 PM EDT> <Info> <Security> <BEA-090065> <Getting boot ident
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Using jsp variable in java code

Hey guys,
I need some help hope you guys can help me.
I've declared a variable "error" in a jsp. how do I access this variable in the java code whice resides in the same jsp page.
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Thanks for the reply.
This is what I want to do.
I've declared a variable "error" using <c:catch var="error">I want to check the value of this variable and suppose if it contains XYZ (error variable will have a long string so I just want to check if it contains a specific value) I want to do step1 and if the variable of error is not XYZ I want to do step 2
Problem is I dont know how to check if error contains the XYZ in jsp thats why I thought java code would help here.
Can you guys suggest a better way to solve my problem.
Thanks again

How to get the Weblogic Server Id from within java code

I would like to log which server (among a cluster) a certain job is running on. Is there a way to get the server id from within Java code (this code is in a session bean if that is relevant.)
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Thanks,
ken

Use the two entries close to the bottom of the page: "list WebLogic
MBeans:listMBeans.jsp
display MBean attributes and operations:showMBean.jsp"
Nils
Anatoly wrote:
>
Cameron,
That page has these items on it:
which one do you think helps with my issue?
Misc WebLogic examples
LongRunningTask
Execute tasks in parallel using WebLogic Execute Threads
Weblogic stats (5.1)
Reload Servlet(s) programmatically (5.1)
Network classload from WebLogic:using reflection,or the launcher
Weblogic 5.1 debugging properties
Seppuku pattern readme
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list WebLogic MBeans:listMBeans.jsp
display MBean attributes and operations:showMBean
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Using com.sun.jdmk.comm.HtmlAdaptorServer with WebLogic 6.1
Cool
EJBGen
Dimitri
back
"Cameron Purdy" <[email protected]> wrote in message news:<3c7a745d$[email protected]>...
JMX ... see http://dima.dhs.org/misc/ for some info on JMX in Weblogic.
Peace,
Cameron Purdy
Tangosol, Inc.
Clustering Weblogic? You're either using Coherence, or you should be!
Download a Tangosol Coherence eval today at http://www.tangosol.com/
"Anatoly" <[email protected]> wrote in message
news:[email protected]..
Does anyone know who to get the managing server URL's port
from within the EJB code running on Weblogic 6.1?
The URL port is not default (not 7001), but when creating
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Appreciate any responses.
-Anatoly
============================
[email protected]

Trouble Setting Windows Environment Variables

My environment:
Windows XP Professional
Intellij 6.0.4
JDK 1.4.
I am seeing some very weird behavior when I try to get/set Environment Variables in Windows XP. I use the following code to read the variables:
Process p = r.exec( "cmd.exe /c set" ); I create an environment varialbe through the Windows control panel, and it does not show up when I execute the above command. However, when I close my IDE and reopen it and run the same code, the variable appears. How is this possible? I am using the Windows XP cmd.exe in my program to read the variables. When I open a DOS window and type the same command, my variable is there.
This is driving me crazy.
i want my program to do some work, but then check a system variable to see if it should continue. I want a user to be able to stop processing by setting the environmen variable to true.
Thanks!
Nathan

Runtime.exec has a lot of overloadings. Two of them
allows you to specify the environment variables.
exec
public Process exec(String[] cmdarray,
String[] envp,
File dir)
throws IOExceptionExecutes the specified command and
arguments in a separate process with the specified
environment and working directory.
cmdarray - array containing the command to call and
its arguments.
envp - array of strings, each element of which has
environment variable settings in format name=value.
dir - the working directory of the subprocess, or null
if the subprocess should inherit the working directory
of the current process.
I had this sample program:
public class SetVarExample {
public static void main (String[] args) throws Exception {
     String[] cmd_env= new String[] {"password="+"ABCD","Path=C:\\Sun\\AppServer\\jdk\\bin"};
     String cmd = "cmd /c SET ";
     Runtime.getRuntime().exec(cmd,cmd_env);
System.out.println( "Finish ...." );
I tried it in a command prompt. But looks like when the program exits, it's a whole new process and so it does not retain the env variables set in the java program.
Any suggestions? Am I doing it worng?
thanks

Execute PL/SQL block with named binds from within java code?

Hi guys,
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BEGIN         :x := :x+1; END;
from my Java code? I need nothing complicated, just static code block with named binds.
I have tried the Oracle exetnded JDBC (setXXXbyName methods):
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And get the java.sql.SQLException: operation not allowed: Ordinal binding and Named binding cannot be combined!
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And x=3 had retuned... Although 4 expected.
Then, I've set parameter sqlj.bind-by-identifier=true
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Can you please mark my mistakes/point to correct solution?
Thanks in advance,
Alexey

Found another solution, this time working at least...
public void testPLSQL() {
       String dynamicSQL=
            "declare\n" +
            " v_CursorID INTEGER;\n" +
            " v_BlockStr VARCHAR2(500);\n" +
            " v_Dummy     INTEGER;\n" +
            " v_x         String(18);\n" +
            "BEGIN\n" +
            " v_CursorID := DBMS_SQL.OPEN_CURSOR;\n" +
            " v_BlockStr :=?;" +
            " DBMS_SQL.PARSE(v_CursorID, v_BlockStr, DBMS_SQL.V7);\n" +
            " v_x:=?;"+
            " DBMS_SQL.BIND_VARIABLE(v_CursorID, ':x', v_x,18);\n" +
            " v_Dummy := DBMS_SQL.EXECUTE(v_CursorID);\n" +
            " DBMS_SQL.VARIABLE_VALUE(v_CursorID, ':x', v_x);\n" +
            " DBMS_SQL.CLOSE_CURSOR(v_CursorID);\n" +
            " ?:=v_x;"+
            " COMMIT;\n" +
            "EXCEPTION\n" +
            " WHEN OTHERS THEN\n" +
            "    DBMS_SQL.CLOSE_CURSOR(v_CursorID);\n" +
            "    RAISE;\n" +
            "END DynamicPLSQL;";
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               Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","user", "password");
               System.out.println("Profit");
     String SQL="begin :x:=:x+1; end;";
     OracleCallableStatement stmt;
     stmt=(OracleCallableStatement)conn.prepareCall(dynamicSQL);
     stmt.setString(1, SQL);
     int x=3;
     stmt.setInt(2, x);
     stmt.registerOutParameter(3,     Types.INTEGER);
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     System.out.println(x);
     assertEquals(4, x);
       } catch (Exception ex) {
            ex.printStackTrace();
            assertTrue(false);
}Now the only thing I need is to code some kind of preprocessor of SQL block, to prepare the dynamicSQL lair for SQL critter...
Please please please show me something less complicated! :8}

How to use odi variable in java code.

Hi,
I am trying to calculate check sum of a file and need to capture that in a odi variable...
I wrote code like this(selected technology as java bean shell)
<@
import java.io.*;
import java.util.zip.*;
public class checksum {
public static void main(String[] args) throws Exception {
FileInputStream fis = new FileInputStream(new File("c:/dummy.txt"));
CheckedInputStream cis = new CheckedInputStream(fis, new CRC32());
BufferedInputStream in = new BufferedInputStream(cis);
while (in.read() != -1) {
#checksum = cis.getChecksum().getValue();
}@>
But I am not able to get that value...
I tried in another way like this
<@
import java.io.*;
import java.util.zip.*;
public class checksum {
public static void main(String[] args) throws Exception {
long result;
FileInputStream fis = new FileInputStream(new File("c:/dummy.txt"));
CheckedInputStream cis = new CheckedInputStream(fis, new CRC32());
BufferedInputStream in = new BufferedInputStream(cis);
while (in.read() != -1) {
result= cis.getChecksum().getValue();
@>
In odi variable refreshing mode i selected schema as memory_engine and wrote
select '<@=result@>' from dual;
even this wont work for me :(
Anyone pls help me in this...
Thanks in advance
Pavan

Hi Phani,
Thanks for the reply. I resolved this. The mistake is I wrote java code in a class,in main function. I removed class and main function. Now I am able to capture value into Odi variable...
I modified code as
<@
import java.io.*;
import java.util.zip.*;
long result;
FileInputStream fis = new FileInputStream(new File("C:/dummy.txt"));
CheckedInputStream cis = new CheckedInputStream(fis, new CRC32());
BufferedInputStream in = new BufferedInputStream(cis);
while (in.read() != -1) {
result=cis.getChecksum().getValue();
@>
finally retrieving result value from dual
select '<@=result@> from dual
Edited by: 908443 on Jan 16, 2012 10:42 PM

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Hi,
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Thanks in advance,
Ronald.

Hi,
In the meantime I found an answer to my problem. In rt.jar there exists a class sun.security.tools.JarSigner, which can be used for exactly this purpose. Not completely portable, but it'll do the trick.
Ronald.

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Sure. The java.util.jar package.
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Hi
I have the following code
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int c;
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}When I run sh -c /home/test.sh from the commandline on my linux box, it works. But when run from within the above java code, it doesnot.Can you please point to what could be missing?
Many Thanks.

Nish_B wrote:
Thanks for the pointer. /home was just an example.
I modified the code to follow the example.
String command1 ="/home/test.sh";
try
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec(command1);
InputStream stderr = proc.getErrorStream();
InputStreamReader isr = new InputStreamReader(stderr);
BufferedReader br = new BufferedReader(isr);
String line = null;
System.out.println("<ERROR>");
while ( (line = br.readLine()) != null)
System.out.println(line);
System.out.println("</ERROR>");
int exitVal = proc.waitFor();
System.out.println("Process exitValue: " + exitVal);
} catch (Throwable t)
t.printStackTrace();
You really really do need to read the traps article.
>
Is there a way to run as a background process? Use a thread.
Currently when I run the above, the script runs and holds the input, I tried passing "&" to the command1 string as well as concatenating it to the exec arg but seems like the test.sh script then fails since it takes that as a parameter.Read the traps article.
So can I run the above script via the java code and let it run as a background process?Read the traps article.

How to manipulate Windows System Variables using Java

Hi There,
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Regards,
Rakesh Nagar

This is not just a Java question. It has never been possible in any Windows program to permanently change the value of an environment variable. You can only change it temporarily, and when the process that changed it ends, so does the change to the environment variable. This has been true since environment variables were added to DOS in about 1983.

How to: Transform Activity: Read global/local variable, execute java code

Could anyone please show me how to do that???

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Running Shell Scripts within Java code!!!

Hi,
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Also I need to ensure my next line of Java code is executed only after the shell script has finished executing.
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Thanks!!!

Runtime.exec and, if you need your Java to stop until the external executable is complete, Process.waitFor.
And you'll want to read this:
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Hello,
if the title doesn't say it all, I need to programmatically get the PID of the JVM process running my application (for monitoring purpose, to ease correlation).
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Any idea?
I'm using Java 6, on Windows, Solaris, and Linux.
Thanks in advance,
J.

I'm not sure I understand. Until the JVM is started (from the host environment's point of view), I don't know its processID, so I can't put it on, say, the commandLine.
Once the JVM is started, I can fetch its process ID (at least on Unices, through a ps/grep/awk), but then I have to find a communication medium to feed the JVM with it (e.g. file).
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Some more questions:
1) is there any simpler solution on Unix/Linux than the ps/grep/awk (I'm far from an Unix guru) to get the PID?
2) is there any solution on Windows to get the PID from MS-DOS?
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Brgds,
J.

Setting Windows Envirnoment variables within Java code!!

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