How can I execute a shell script from Pega?
I have a requirement where I need to execute a shell script from Pega. This shell script exists on the Pega server/box and takes multiple(5-five) parameters. I have found below piece of Java Code on this forum which has been accepted as correct answer. But when I am trying to use this for my requirement I face below problems or have below questions. Any help is most appreciated
Clarifications needed for below Code:
1. When I try to save this code as is in Java step in an activity I get - "File cannot be resolved to a type"
2. In the 1st line as I see the name of the shell script and arguments are being passed. As in my case the script takes 5 parameters. How should I pass these? And what about the sequence of parameters?
3. Also I did not understand below part. What do I need to add to the Map env?
Map<String, String> env = pb.environment();
env.put("VAR1", "myValue");
env.remove("OTHERVAR");
env.put("VAR2", env.get("VAR1") + "suffix");
Piece of Java code found on this forum:
I have a requirement where I need to execute a shell script from Pega. This shell script exists on the Pega server/box and takes multiple(5-five) parameters. I have found below piece of Java Code on this forum which has been accepted as correct answer. But when I am trying to use this for my requirement I face below problems or have below questions. Any help is most appreciated
Clarifications needed for below Code:
1. When I try to save this code as is in Java step in an activity I get - "File cannot be resolved to a type"
2. In the 1st line as I see the name of the shell script and arguments are being passed. As in my case the script takes 5 parameters. How should I pass these? And what about the sequence of parameters?
3. Also I did not understand below part. What do I need to add to the Map env?
Map<String, String> env = pb.environment();
env.put("VAR1", "myValue");
env.remove("OTHERVAR");
env.put("VAR2", env.get("VAR1") + "suffix");
Piece of Java code found on this forum:
ProcessBuilder pb = new ProcessBuilder("myshellScript.sh", "myArg1", "myArg2");
Map<String, String> env = pb.environment();
env.put("VAR1", "myValue");
env.remove("OTHERVAR");
env.put("VAR2", env.get("VAR1") + "suffix");
pb.directory(new File("myDir"));
Process p = pb.start();
PS- I am using Pega 7.3. Let me know if any more details are needed.
Accepted Solution
Pegasystems Inc.
IN
Hi,
Can you try below
String[] command = {"/bin/bash", "test.sh", "Argument1"};
ProcessBuilder p = new ProcessBuilder(command);
Process p2 = p.start();
BufferedReader br = new BufferedReader(new InputStreamReader(p2.getInputStream()));
String line;
System.out.println("Output of running " + command + " is: ");
while ((line = br.readLine()) != null) {
System.out.println(line);
}
I dont have Linux with me hence I cannot test.
Regards,
Ujjwal
Pegasystems Inc.
IN
Hi Onkar,
I was able to call batch using
try {
String[] command = {"cmd.exe", "/C", "Start", "C:\\new.bat"};
Process p = Runtime.getRuntime().exec(command);
} catch (Throwable t)
{
t.printStackTrace();
}
I think in activity File class is not getting recognized.
You may try to adapt this code for Shell.
Thanks,
Ujjwal
HCL
IN
Hi Ujjwal,
Thank you for your answer.
As I understand from your code above you are running a command on command prompt. In my case I have to use the ProcessBuilder api to run the script. I am not aware how do I run the script with multiple parameters. If you have any idea about that kindly let me know.
Best Regards,
Onkar
Accepted Solution
Pegasystems Inc.
IN
Hi,
Can you try below
String[] command = {"/bin/bash", "test.sh", "Argument1"};
ProcessBuilder p = new ProcessBuilder(command);
Process p2 = p.start();
BufferedReader br = new BufferedReader(new InputStreamReader(p2.getInputStream()));
String line;
System.out.println("Output of running " + command + " is: ");
while ((line = br.readLine()) != null) {
System.out.println(line);
}
I dont have Linux with me hence I cannot test.
Regards,
Ujjwal
HCL
IN
Hi Ujjwal,
Thank you for the response. Even I don not have Linux with me either right now. I shall let you know about the result once I have tested this.
By the way File class is recognized if I use java.io.File instead of just File.
Regards,
Onkar