Calling PERL program from JAVA

what is the most efficient way to call PERL scripts from JAVA class?
please help,
thank you,

use of Webservices is the best answer which anyone can give you
Alright you might have to take help of XML-RPC(by hosting perl in a remote server) to call perl routines from java Class instances.
How you do that ?? please go ahead and try get more insight information from the below aritcle
http://www.javaworld.com/javaworld/jw-10-2004/jw-1011-xmlrpc.html
and if you are instrested in any other core solutions
http://www.perl.com/pub/a/2003/11/07/java.html
http://sunsite.ualberta.ca/Documentation/Misc/perl-5.6.1/jpl/docs/Tutorial.html
http://search.cpan.org/~patl/Inline-Java-0.52/Java/PerlInterpreter/PerlInterpreter.pod
http://www.perlmonks.org/index.pl?node_id=373839
the above links might intrest you.
Hope that might help :)
REGARDS,
RaHuL

Similar Messages

Call PERL script from JAVA

I am facing a problem in running a PERL script in JAVA in UNIX box..
I am able to call ther perlscript.
Perl script has
#! /usr/local/bin/perl
print "\nEnter Your Name :";
$name = <>;
print "\nYour Name is : $name\n";
exit 0;
Perl script request for the INPUT(name) .
My Java program is
File perlfile = new File("test.pl");
Runtime runtime = Runtime.getRuntime();
Process process = runtime.exec("perl "+perlfile);
Here is the problem tat IT IS says error =2 ..What has to be the solution so tat i can CALL PERL SCRIPT as similiar to running it separatly in prompt { >perl test.pl }
PLEASE help me on this....

In the PERL SCRIPT (test.pl)
LINE 1 : #! /usr/local/bin/perl
LINE 2 : print "\nEnter Your Name :"; .
LINE 3 : $name = <>;
LINE 4 : print "\nYour Name is : $name\n";
LINE 5 : exit 0;
When i run this script in perl test.pl in prompt (UNIX BOX), i am gettin the request for name "Enter Your Name:____ " but when i call this script from Java it doesn't request for name and moreover the process doesnt ends (use ctrl+c to come out of the process).When i come out forcefully it shows the ERROR=2.
My requirement is such tat need to call a PERL SCRIPT from java so tat java process give the control to PERL script and it will continue the process..
Sample scenario:
Java move a file and store it in a new FOLDER
MY perl script will read the file in new FOLDER.
here the perl script will get the file name for processing... My issue comes here .$name is not be prompted while calling thro java..

Error in calling 'C' Program from Java

Hi,
We developed a 'C' Program and during compilation, we got a couple of Incompatible Prototype warnings. Then we made a Jni call to 'C' program from Java Program. The program returned a "Unsatisfied Link Error - unreference Symbol not found" error.
Does Jni call fails owing to warnings by compiler?
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Did you try running your C program through g++? It sounds like something is broken, but GCC often will allow you to compile anyways.
-Jason Thomas.

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Hi All,
Is there a way of calling external applications from Java without using Runtime.exec(). That method seems quite messy when you are dealing with streaming data from an input file to an output file. Basically what I'm asking is there a way to run a command the same way you would type it in a command shell?
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LeWalrus wrote:
Ok, I've an external application that I want to be called inside a Java GUI. It has several input arguements, which the format looks something like:
programname inputfile > outputfile
Simple enough.
>
Works fine from a shell command line. From what I understand, this won't work using Runtime.exec() because that method will just start the application. Works fine from Runtime.exec(). Since you are'>' to write stdout to a file you need to us a shell to execute the command.
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Call other programs from Java

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How can I call or execute external programs/commands from JAVA...
is not native code that I want to run...
Thank you

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Hi,
we have written some code in c and we need to call those codes from an interface written in java. How do I do it ?
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java native interface...is that true...how do i call up the c program
JNI Tutorial
JNI Tutorial (ZIP)
(found by the Magic of Google: JNI Tutorial)
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Calling perl script from java ---help needed

I haven't been doing a lot with java lately and i'm building an app with netbeans and having some difficulty with my button calling an outside perl script I'm pasting the code and error below...any help would be greatly appreciated. It's running on fedora 9 pretty much default install...
thanks.
code:
Runtime r = Runtime.getRuntime();
Process p = null;
String s = null;
String cmd123[] = { "perl /home/deaddev/test1.pl" };
try {
p = r.exec(cmd123);
catch {
foo bar/etc/etc
error:
Oct 12, 2008 4:09:37 PM photomainmgr readToPerlActionPerformed
SEVERE: null
java.io.IOException: Cannot run program "perl /home/deaddev/test1.pl": java.io.IOException: error=2, No such file or directory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:474)
at java.lang.Runtime.exec(Runtime.java:610)
at java.lang.Runtime.exec(Runtime.java:483)
at photomainmgr.readToPerlActionPerformed(photomainmgr.java:117)
at photomainmgr.access$000(photomainmgr.java:21)
at photomainmgr$1.actionPerformed(photomainmgr.java:54)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2012)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2335)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:404)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:253)
at java.awt.Component.processMouseEvent(Component.java:6101)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3276)
at java.awt.Component.processEvent(Component.java:5866)
at java.awt.Container.processEvent(Container.java:2105)
at java.awt.Component.dispatchEventImpl(Component.java:4462)
at java.awt.Container.dispatchEventImpl(Container.java:2163)
at java.awt.Component.dispatchEvent(Component.java:4288)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4461)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4125)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4055)
at java.awt.Container.dispatchEventImpl(Container.java:2149)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4288)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:604)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)
Caused by: java.io.IOException: java.io.IOException: error=2, No such file or directory
at java.lang.UNIXProcess.<init>(UNIXProcess.java:164)
at java.lang.ProcessImpl.start(ProcessImpl.java:81)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:467)
... 30 more
error executing perl /home/deaddev/test1.pl

jschell wrote:
sabre150 wrote:
As and alternative you can useString cmd123 = "perl /home/deaddev/test1.pl";Using the single string approach YOU have to do any quoting so with this line no quoting takes place and the script /home/deaddev/test1.pl will be executed.Although that should be true apparently it isn't. I have just run
Process p = Runtime.getRuntime().exec("perl /home/sabre/work/dev/perl/xxx.pl");
new Thread(new SyncPipe(p.getErrorStream(), System.err)).start();
new SyncPipe(p.getInputStream(), System.out).run();
int returnCode = p.waitFor();
System.out.println("Return code = " + returnCode);which correctly executes the perl script xxx.pl.
P.S. SyncPipe is a Runnable that copies an InputStream to an OutputStream.
Edited by: sabre150 on Oct 14, 2008 9:19 AM
Interesting! Even though Runtime.exec() works with a single String, ProcessBuilder fails with this approach! You have to split the argument string. This certainly looks like a bug! Some while ago I looked at the source for Runtime.exec() to look at the differences between Runtime.exec() and ProcessBuilder and found that behind the scenes Runtime.exec() uses ProcessBuilder.
More research is required.

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Hi thanks for all replies !
Ok let me explain more about my problem.
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Calling RPG program from Java

Hi All,
I'm somwhat new to Java (coming from an AS400 background) and I'm stuck with what I think is a fairly simple problem. But I've been looking at this for so long, I'm probably missing something really simple and I hope someone can help me with this.
I've created a bean that needs to call an RPG program on the AS400. I've looked at code throughout this site to compare and it looks the same. My problem is I'm getting an error when I try to run it.
"com.ibm.db2.jdbc.app.DB2SQLException2: [IBM][JDBC Driver][14012] The index for the parameter is not valid."
Here's my code:
CallableStatement stpCall ;
String sql = "CALL LIB.CHECKLOGIN ( ?, ?, ? )" ;
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Connection connection = null;
connection = ivDataSource.getConnection();
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stpCall.setString( 1, ivUserID ) ;
stpCall.setString( 2, ivPassword ) ;
stpCall.registerOutParameter( 3, Types.INTEGER ) ;
stpCall.execute() ;
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System.out.println(e);
I've tried it a couple different ways and still get the same error. So if anybody can let me know what I'm missing or what I'm doing wrong I would greatly appreciate it. Thanks.

Thanks jedilowe.
Here's the code I'm trying to run:
CallableStatement stpCall ;
     String sql = "CALL CHECKLOGIN ( ?, ?, ? )" ;
     Connection connection = null;
     connection = ivDataSource.getConnection();
try {
stpCall = connection.prepareCall( sql ) ;
stpCall.setString( 1, ivUserID ) ;
stpCall.setString( 2, ivPassword ) ;
stpCall.registerOutParameter( 3, Types.INTEGER ) ;
stpCall.execute() ;
ivError = stpCall.getString(3) ;
} catch (Exception e) {
e.printStackTrace();
I'm looking through the stderr log now. Most of if looks like a foreign language, but do you have an idea of what to look for? Anything specific? Here's a few lines from the log:
com.ibm.db2.jdbc.app.DB2SQLException2: [IBM][JDBC Driver][14012] The index for the parameter is not valid.
java/lang/Throwable.<init>(Ljava/lang/String;)V+4 (Throwable.java:94)
java/sql/SQLException.<init>(Ljava/lang/String;Ljava/lang/String;I)V+1 (SQLException.java:43)
com/ibm/db2/jdbc/app/DB2SQLException2.<init>(Ljava/lang/String;Ljava/lang/String;I[B)V+1 (DB2SQLException2.java:281)
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      com/ibm/db2/jdbc/app/DB2PreparedStatement.beforeSetXXX(I)I+86
Can anyone decifer this mess and based on the code above, tell me what the heck is wrong with the code!!! I've been fighting this for almost a week now. Thanks for all your help.

Help .. I need to call Exe program from java & run it quickly

Hi...
I have an Exe program ..
when it run in windows ( called by windows ) it takes 300 M.S
but when we called it in java It takes 3000 M.S .. Why..
where is the problem ..
... Help please
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What are you doing with the input and output streams of the spawned process?

Problem calling two perl modules from java in seperate threads(JVM CRASHES)

Dear Friends,
I have one severe problem regarding calling perl modules from java
I had to call two perl modules simultaneously (i.e.) from two threads,,, but jvm crashes when one of the perl calls is exiting earlier
I am unable to spot out why ....
For calling perl from java ...., We are first calling C code from java using JNI and then Perl code from C
All works fine if we call only one perl call at a time.... If we call them in a synchronized manner the JVM is not crashing .... But we don't want blocking..
The following is the code snippet
<JAVA FILE>
class Sample
     static {
          System.loadLibrary("xyz"); // Here xyz is the library file generated by compiling c code
     public native void call_PrintList();
     public native void call_PrintListNew();
     Sample()
          new Thread1(this).start();
     public static void main(String args[])
          System.out.println("In the main Method");
          new Sample().call_PrintList();
     class Thread1 extends Thread
          Sample sample;
          Thread1(Sample sam)
               sample=sam;
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}<C FILE>
#include <EXTERN.h>
#include <perl.h>
static PerlInterpreter *my_perl;
static char * words[] = {"alpha", "beta", "gamma", "delta", NULL } ;
static void
call_PrintList(){
     printf("\nIn the Call method of string.c\n");
        char *wor[] = {"hello", "sudha", NULL } ;
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           PERL_SYS_INIT3(&argc,&argv,&env);
           my_perl = perl_alloc();
               PL_perl_destruct_level = 1; //// We have mentioned this also and tried removing destruct call
           perl_construct( my_perl );
           perl_parse(my_perl, NULL, 2, my_argv, (char**)NULL);
          PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
           perl_run(my_perl);
     dSP ;
        perl_call_argv("PrintList", G_DISCARD, wor) ;
PL_perl_destruct_level = 1;
//     perl_destruct(my_perl);
//          perl_free(my_perl);
//           PERL_SYS_TERM();
static void
call_PrintListNew(){
printf("In the new call method\n");
char *wor[] = {"Hiiiiiiiiiiiiiii", "Satyam123333", NULL } ;
        char *my_argv[] = { "", "string.pl" };
        PERL_SYS_INIT3(&argc,&argv,&env);
        my_perl = perl_alloc();
PL_perl_destruct_level = 1;
        perl_construct( my_perl );
        perl_parse(my_perl, NULL, 2, my_argv, (char**)NULL);
        PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
        perl_run(my_perl);
        dSP ;
        perl_call_argv("PrintListNew", G_DISCARD, wor) ;
PL_perl_destruct_level = 1;
//      perl_destruct(my_perl);
//      perl_free(my_perl);
   //     PERL_SYS_TERM();
void callNew()
call_PrintListNew();
void call ( )
call_PrintList();
//char *wor[] = {"hello","sudha",NULL};
/*   char *my_argv[] = { "", "string.pl" };
      PERL_SYS_INIT3(&argc,&argv,&env);
      my_perl = perl_alloc();
      perl_construct( my_perl );
      perl_parse(my_perl, NULL, 2, my_argv, (char**)NULL);
     PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
      perl_run(my_perl);*/
   //   call_PrintList();                      /*** Compute 3 ** 4 ***/
/*      perl_destruct(my_perl);
      perl_free(my_perl);
      PERL_SYS_TERM();*/
    }And Finally the perl code
sub PrintList
            my(@list) = @_ ;
            foreach (@list) { print "$_\n" }
sub PrintListNew
            my(@list) = @_ ;
            foreach (@list) { print "$_\n" }
        }Please help me in this regard

Dear Friends,
I have one severe problem regarding calling perl modules from java
I had to call two perl modules simultaneously (i.e.) from two threads,,, but jvm crashes when one of the perl calls is exiting earlier
I am unable to spot out why ....
For calling perl from java ...., We are first calling C code from java using JNI and then Perl code from C
All works fine if we call only one perl call at a time.... If we call them in a synchronized manner the JVM is not crashing .... But we don't want blocking..
The following is the code snippet
<JAVA FILE>
class Sample
     static {
          System.loadLibrary("xyz"); // Here xyz is the library file generated by compiling c code
     public native void call_PrintList();
     public native void call_PrintListNew();
     Sample()
          new Thread1(this).start();
     public static void main(String args[])
          System.out.println("In the main Method");
          new Sample().call_PrintList();
     class Thread1 extends Thread
          Sample sample;
          Thread1(Sample sam)
               sample=sam;
          public void run()
               sample.call_PrintListNew();
}<C FILE>
#include <EXTERN.h>
#include <perl.h>
static PerlInterpreter *my_perl;
static char * words[] = {"alpha", "beta", "gamma", "delta", NULL } ;
static void
call_PrintList(){
     printf("\nIn the Call method of string.c\n");
        char *wor[] = {"hello", "sudha", NULL } ;
           char *my_argv[] = { "", "string.pl" };
           PERL_SYS_INIT3(&argc,&argv,&env);
           my_perl = perl_alloc();
               PL_perl_destruct_level = 1; //// We have mentioned this also and tried removing destruct call
           perl_construct( my_perl );
           perl_parse(my_perl, NULL, 2, my_argv, (char**)NULL);
          PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
           perl_run(my_perl);
     dSP ;
        perl_call_argv("PrintList", G_DISCARD, wor) ;
PL_perl_destruct_level = 1;
//     perl_destruct(my_perl);
//          perl_free(my_perl);
//           PERL_SYS_TERM();
static void
call_PrintListNew(){
printf("In the new call method\n");
char *wor[] = {"Hiiiiiiiiiiiiiii", "Satyam123333", NULL } ;
        char *my_argv[] = { "", "string.pl" };
        PERL_SYS_INIT3(&argc,&argv,&env);
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PL_perl_destruct_level = 1;
        perl_construct( my_perl );
        perl_parse(my_perl, NULL, 2, my_argv, (char**)NULL);
        PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
        perl_run(my_perl);
        dSP ;
        perl_call_argv("PrintListNew", G_DISCARD, wor) ;
PL_perl_destruct_level = 1;
//      perl_destruct(my_perl);
//      perl_free(my_perl);
   //     PERL_SYS_TERM();
void callNew()
call_PrintListNew();
void call ( )
call_PrintList();
//char *wor[] = {"hello","sudha",NULL};
/*   char *my_argv[] = { "", "string.pl" };
      PERL_SYS_INIT3(&argc,&argv,&env);
      my_perl = perl_alloc();
      perl_construct( my_perl );
      perl_parse(my_perl, NULL, 2, my_argv, (char**)NULL);
     PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
      perl_run(my_perl);*/
   //   call_PrintList();                      /*** Compute 3 ** 4 ***/
/*      perl_destruct(my_perl);
      perl_free(my_perl);
      PERL_SYS_TERM();*/
    }And Finally the perl code
sub PrintList
            my(@list) = @_ ;
            foreach (@list) { print "$_\n" }
sub PrintListNew
            my(@list) = @_ ;
            foreach (@list) { print "$_\n" }
        }Please help me in this regard

Calling c code from java

hello everyone
I have question
I need to call c program from java
I don't have problem with application or exe file in c it is working but when I call it from java it doesn't work there is no error but it doesn't work because when I execute the c program the black screen must be appeared so that I can enter the input file and then it produces the output file but in java I cann't see the black screen so please can you tell me the problem
I have used the following code to call c from java:
String line;
               String output1 = "";
                     Process p = Runtime.getRuntime().exec("cpp.exe");
                     BufferedReader input = new BufferedReader
                           (new InputStreamReader(p.getInputStream()));
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Hi,
Try this in your code
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Regards

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I've tried using Runtime.exec to call my C++ program from Java but I don't think I'm doing it correctly. Could someone explain how to properly use it? Here's what I'm trying (this is in an applet that is only going to be running on an intranet so only PCs in my LAN will be affected):
Runtime runtime=runtime.getRuntime();
Process proc =runtime.exec("mkdir C:\\Test");

What do you expect your operating system should do with a command "mkdir"? It doesn't understand this. "mkdir" is a shell command, so you need to execute the shell:
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How to Call abap functn/program from java layer

Hi all,
I have to develop a program which has to call abap function/program from java side or how to call a abap program through java ..
pls send me related links or explanations.. dont send unrelated answers..
Regards,
Arivarasu S

Hi,
You mean accessing ABAP functions from J2EE perspective, then I think we can do this by using SAP Java Resource Adapter and also through webservices.
SAP Java Resource Adapter (SAP JRA) can be used as an add-on for the SAP JCo SAP JRA enables the implementation of standard interfaces from diverse J2EE servers to the SAP JCo in the SAP Web AS. The SAP JRA thus simplifies
communication with ABAP within heterogeneous J2EE landscapes.
Go through the following links which has Good documentation on how to achieve this
Accessing BAPIs Using the SAP Java Resource Adapter
[https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/ad09cd07-0a01-0010-93a9-933e247d3ba4]
Connectivity and Interoperability
[https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/326d82e5-0601-0010-fca4-9caf27b89c26]
Finally with WebServices. Accessing SAP Business Functions (ABAP) via Web Services
[https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/06adbf03-0a01-0010-f386-d8e45561a3c4]
Regards
Raghu

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How do I execute a Perl program from within a Java program.
Lets say the Perl program that I want to execute is 'abc'. Now, 'abc' requires some input that I want to give it from within the Java program. How do I do it?
And finally, how do I execute that Perl program from within the Java program.
If I execute the Perl program alone then I do it in the following way -
perl abc inp1 inp2 inp3
where inp1, inp2, inp3 are inputs to the Perl program. I will not be able to change or modify the coding of the Perl program - 'abc' as I do not have access to its code. Its a kind of an application whose usual method of execution is in the above shown way. So, how do I execute 'abc' from within a Java program.

what part of don't crosspost, don't you understand?
http://forum.java.sun.com/thread.jsp?forum=4&thread=427193

Calling PERL program from JAVA

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