12c SOA - How to call a shell script from BPEL using java embedding

 Implementation steps:

Step 1: Create a SOA project with empty composite.

Step 2: Create an XSD.

<?xml version="1.0" encoding="windows-1252" ?>

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://www.example.org"

            targetNamespace="http://www.example.org" elementFormDefault="qualified">

  <xsd:element name="Input">

    <xsd:complexType>

      <xsd:sequence>

        <xsd:element name="num1" type="xsd:string"/>

        <xsd:element name="num2" type="xsd:string"/>

      </xsd:sequence>

    </xsd:complexType>

  </xsd:element>

    <xsd:element name="Output">

    <xsd:complexType>

      <xsd:sequence>

        <xsd:element name="result" type="xsd:string"/>

      </xsd:sequence>

    </xsd:complexType>

  </xsd:element>

</xsd:schema>

Step 3: Create a Synchronous BPEL service using that schema exposing as a web service.

Step 4: Create a Shell script file and saved in UNIX directory.

Test.sh:

#!/usr/bin/bash

num1=$1

num2=$2

function add(){

sum=`expr $num1 + $num2`

echo "$sum"

return $sum

}

add $num1 $num2

Step 5 : Create a Java class(Right click on project⇾ New Galary⇾ Class(Java))

Test.java:

package invokeshellscriptproject;

import java.io.*;

public class Test {

          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 = "bash /soashare/shellscript/test.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;

           }

}

Step 6: Create a string variable Var1.

Step 7:  Drag and drop a Java embedding activity in the BPEL.

Java_Embedding2:

Test pocob = new Test();               

try{         

addAuditTrailEntry("Started From This Place");        

String i = ((oracle.xml.parser.v2.XMLElement)getVariableData("inputVariable","payload","/ns1:Input/ns1:num1")).getFirstChild().getNodeValue();    

int k = Integer.parseInt(i);        

addAuditTrailEntry("k Variable " +k);        

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

}

Step 8 : Import the java class in the BPEL. location used as packageName.ClassName

<import location="invokeshellscriptproject.Test" importType="http://schemas.oracle.com/bpel/extension/java"/>

Step 9 : Assign Var1 to result variable.