How to call Shell Script in BPEL process using Java Embeed

Step 1:- Write Shell Script For addition of two number.

Step 2:- Create XSD which will contain two numbers.

<?xml version= '1.0' encoding= 'UTF-8' ?>

<schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://xmlns.oracle.com/ns/Numeric"

     xmlns:num="http://xmlns.oracle.com/ns/Numeric" attributeFormDefault="qualified" elementFormDefault="qualified">

    <element name="Numeric" type="num:NumericType"/>

    <complexType name="NumericType">

        <sequence>

            <element name="Num1" type="int"/>

            <element name="Num2" type="int"/>

                    </sequence>

    </complexType>

</schema>

Step 3:-Write a Java code to call shell script along with passing variable to script. Below code is written to open the script created in cygwin.

package com.test;

import java.io.*;

public class MyTest1 {

       

          public String ShellScript(int i, int j) throws IOException

          {

               String Var=null;

          try{

                Process P;

                System.out.println(i);

                System.out.println(j);

              String strParam = "D:\\cygwin\\bin\\bash -c '/cygdrive/d/testShell/SumOfTwoNumber.sh "

                                                     + i +" + "+ j+" '";

                                     P = Runtime.getRuntime().exec(strParam);

                          System.out.println("here " + strParam);

             BufferedReader br = new BufferedReader(new InputStreamReader(P.getInputStream()));

            String line=null;

            

              while ( (line = br.readLine()) != null){

                        System.out.println("Output" + ">" + line);

                  Var=line;

                        }

                System.out.println(line);

                System.out.println("Output of Var:-"  +Var);

             

            int wait = P.waitFor();

            System.out.println("exit code: "+wait);

               

            }

            catch (InterruptedException ie)

            {

              System.out.println("exception caught");

            }

            catch (Throwable t)

                  {

                    t.printStackTrace();

                  }

               return Var;

              

           }

For Script available in Bash or Corn Shell then need to modify line.

 String strParam = "bin\bash -c \SumOfTwoNumber.sh + i +" + "+ j+" ";

 String strParam ="bin\ksh -c \SumOfTwoNumber.sh + i +" + "+ j+" ";

Step4:- Create BPEL process to contain java embeed.

Modify BPEL source code to containg following below class

<bpelx:exec import="YourFullyQualifiedClassName(example com.oracle.shellscript)"/>

Java Embeed will contain following below code

MyTest1 pocob = new MyTest1();               

try{         

addAuditTrailEntry("Started From This Place");        

String i = ((oracle.xml.parser.v2.XMLElement)getVariableData("inputVariable","payload","/ns1:Numeric/ns1:Num1")).getFirstChild().getNodeValue();   

int k = Integer.parseInt(i);        

addAuditTrailEntry("k Variable " +k);        

String j = ((oracle.xml.parser.v2.XMLElement)getVariableData("inputVariable","payload","/ns1:Numeric/ns1:Num2")).getFirstChild().getNodeValue();           

int n = Integer.parseInt(j);        

addAuditTrailEntry("n Variable " +n);        

addAuditTrailEntry("Before Variable");        

String greetings = pocob.ShellScript(k,n);       

addAuditTrailEntry("After Variable");        

addAuditTrailEntry("Value:- " +greetings);        

setVariableData("Var1",greetings);     //Var1 is a variable created in BPEL process to contain result     

addAuditTrailEntry("After Assignment");        

}        catch(Exception io){                                                                         
      addAuditTrailEntry("Exception occured:"+io.getMessage());                                                          
      javax.xml.namespace.QName qName=new javax.xml.namespace.QName("http://schemas.oracle.com/bpel/extension","remoteFault");                                                                               
      com.oracle.bpel.client.BPELFault bpelFault=new com.oracle.bpel.client.BPELFault(qName);               
      throw bpelFault;                                
    }       
finally{        
pocob=null;   
  
}

Add following libraries in classpath.

Assign Var1 Variable to BPEL output variable.

Enjoy the testing.