While loop in SOA

In this post let’s see how we can use While loop in SOA BPEL.

In the example below, we pass input as a number (n) and the response would be sum of all numbers till n (0+1+…n).

  • Create SOA Application (SOA_Appln)
  • Create SOA Project (SOAproj_While)
  • Create BPEL (Synchronous BPEL 2.0)
  • Edit the XSD like below.

 

  • Create two scope variables at BPEL scope level (‘sum’, ‘i’) of type ‘xml schema simple type – int’.

  • Now add Assign activity below receive activity and double click on it. drag an expression and give the value 0 and map it to the scope variable ‘sum’ which we created before. similarly create another expression, give value as 0 and map it to scope variable ‘i’.

  • Now drag the while activity below the Assign1 activity.¬† Double click on it and give the condition as ($i < $inputVariable.payload/client:input) which means while this condition satisfies the loop will be executed.

  • Now we need to increment the value right, so drag the assign activity inside while loop and double click on it.¬† drag the expression builder and give the value as $i+1 and map it to scope variable ‘i’. similarly again drag expression builder and give value as $i+$sum and map it to scope variable ‘$sum’ which means we are summing the sum value with the current loop count. (If loop is 4 then sum would be sum+4. Till the loop3, sum will be 1+2+3 =>6. So at loop4 sum would be sum+4 => 6+4 => 10.

  • We are done with the while loop. After the loop exits, now we need to assign the final sum value which we stored in the scope variable ‘sum’ to the output variable. So create an assign activity after while loop and double click on it.

  • The final BPEL will look like below.

  • Deploy the application to SOA server.
  • Let’s test the project. Give input as ‘4’ and the output would be ’10’.

Happy Looping ūüôā

 

Advertisements

Translate Native Format File to XML File and Vice versa using Translator in SOA 12c

Translator is the new component introduced in SOA 12c which is very useful to convert any native format file like CSV to XML and vice versa.

Now am going to create a new application and BPEL process for doing this in JDeveloper 12.1.3

1) Create a new SOA Application named ‘TranslateApplication‘ and a project named ‘TranslateProj

Snap1

2) Select Composite with BPEL Process and click on Finish

3) Name the BPEL Process as ‘TranslateBPELProcess‘ and Template as ‘Synchronous BPEL Process’ and click on OK

Snap2

4) Drag and drop the Translate Activity which is under Oracle Extensions to the BPEL Process and double click on it.

Snap3

5) Click on the Search icon and for Input and assign the client:input variable to it

Snap4

6) For NXSD Schema field Click on the ‘New xsd icon’ and Select file type as Delimited¬†and click on Next.

Snap5

7) In the next screen browse the File and click on Next.

Snap7

8) Select File contains only one record and Next. In next screen Enter the name for element as ‘Emp’

Snap8

9) Check the Use First Record as the Field Name and click on Next and Finish.

Snap9

10) Create an Output variable for assigning to reply Output and click on OK.

Snap10

11) Now open the created Schema and remove the few xsd:schema attributes which are not required (nxsd:hasHeader, nxsd:HeaderLines , nxsd:headerLinesTerminatedBy) and save it.

Snap11

12) Deploy the Project to server

Snap12

13) ¬†Give the value for input as ‘Ravi, 15, 1000’ and click on Test Web Service and then click on ‘Launch Flow Trace’

Snap15

14) Click on Input and Translate to see the comma seperated input and XML output.

Snap16

15) If you are not able to see the Translate value in XML format then click on the deployed project and under settings change the Composite Audit Level to Development and test again. You can see the response in XML Format.

Snap18

BPEL Creation with DB Adapter usage and consuming it in ADF application as webservice

Story of Project:  We are going to pass the employee id from the ADF web application to SOA BPEL, which fetches more details of an employee from the database and returns them to ADF which are then shown on the ADF page. Tool used for this project is JDev 12.1.3

This Post includes the following

  • SOA Application¬†creation
  • DB Adapter Configuration (for connecting to Database)
  • BPEL Creation (WSDL generation)
  • ADF Application Creation
  • Consuming the WSDL and create data controls
  • Test from the ADF Application

SOA Application Cretion:

Create a SOA Application with name ‘SOA_fetchDBdataApp’

Snap2

Create a Project ‘FetchEmpDataProj’ and select the Composite With BPEL Process¬†while project creation

Snap3

Create a BPEL with the name ‘fetchEmpDetailsBPEL’ and select Template as Synchronous BPEL Process and then click OK

Snap4

The BPEL will be created with receiveInput and replyOutput as default schema components.

Snap17

Navigate to Databases tab and create a new Database Connection with the name with which we created in console

Snap21

Now Navigate the Database Adapter to the bpel flow

Note: Before proceeding from this step you should configure your DB Adapter in the console first. Please go through the DB Adapter configuration steps given at the end of the post.

Snap22

Give the dbreference name and click on Next

Snap23

Click on Search Icon and select the created Database Connection and click on Copy Connection

Snap24

Check only Select check box as we are doing only select operation in this example and click on Next

Snap25

Click on Query button to select the existing table in DB and move it to the selected area by clicking on right single row.

Snap26

Now remove the unneccessary  relationships by selecting each and clicking on remove button

Snap27

Click on Add button for creating a bind variable to the query which basically used to pass a variable dynamically. Generally to apply where condition its been used

Snap28

Click on Edit button beside to query click on Add button and then Check the Parameter option and select the created parameter ’empId’ from dropdown

Snap29

You can observer the modified SQL query

Snap30

Click on Next and finally Click on Finish

Snap31

Drag and drop the Invoke BPEL Constructor below to input and map to the dbreference

Snap34

Configure the Input and Output for this DB adapter. Click on + symbol and give names to the input and output variables.

Snap36

Now drag and drop the Assign Constructor below to input

Snap37

Double click on Assign which opens a Edit Assign popup in which map the input variable value to input of database adapter and click on Apply and OK

Snap38

Now assign the output of DB Adapter to the reply output of BPEL.  For that use Assign constructor.  Here the output of DB adapter has many fields so create as many outputs in the schema also to map from DB Output to BPEL output.

Open the schema file (.xsd file) and add the the required inputs and outputs in its source view

Snap35

Now drag and drop the Assign Constructor to below to DB adapter to  map the output of DB Adapter to BPEL output.

Snap40

And then double click on it for mapping. a popup window opens where map the output of DB adapter to output variable of BPEL. Map all fields directly. There is field named ‘EmpName’ at¬†the output section for which the input should be from two fields (firstname, lastname) so drag and drop the Expression icon to the output field ‘EmpName’

Snap41

On Drag of Expression onto field a popup opens where click on concat and then click on first name and last name. The format should be concat(val1, val2) which combines the output of these two fields  and stores in EmpName field.

Snap42

Finally click on Apply and OK

Snap43

Deployment:

Save the project and right click on project-> Deploy

Snap44

Click on Deploy to Application Server.

Check the box Overwrite any existing composites with the same revision ID. which basically useful for generating same wsdl url for every deployment. Click on Next

Snap46

Click on Integrated weblogic server. Here you can add any server and deploy to that.

Select the domain (Default Server) and click on Finish which finishes the deployment.

Snap47

Open Enterprise Manager on browser. Select the project and click on Test

Snap51

Copy the WSDL to clipboard. Give the input as 102 and click on Test Web Service

Snap52

It opens the Response tab with the result. you can Launch Flow Trace to view the complete step by step response

Snap63

ADF Application Creation:

Create ADF Fusion Web Application ‘ADF_SOA_App’ keep the default names for the project.

Snap64

Create a custom project ‘consumeEmpWS’

Snap65

Right click on the created project -> New -> Select Web Service Client and Proxy

Snap66

Paste the copied WSDL URL in the WSDL Document URL field and click on Next and proceed by keeping default settings and Finish.

Right click on the WSDL and click on Test Web Service which opens a Http Analyzer.

Snap69

Give the input and click on Send Request which returns Response at right side.

Snap70

Now right click on the WSDL file and click on Generate Data Controls which generates the data controls which can be used on in the ADF page.

Snap72

You can see the updated data Controls Section

Snap73

Now Create a jspx page under View Controller Project.

Snap74

Check the JSP XML and name it ‘getDetails.jspx’

Snap79

Go to Source code of the page and then drag and drop the web service data controls on to the center facet of the page and select the option as ADF Parameter Form.

Snap76

Now right click on the page and click on Run

Snap77

In the page pass the Employee Id and you can see the more details which are fetched through BPEL and displayed on the page.

Snap78

DB Adapter Configuration:

This includes creation of Data Source, DB Adapter Outbound Connection Creation, mapping created Outbound Connection Creation with created data source.

Open Console and Create Data Source for connecting to the database.

Snap11

Create a New Generic Data Source

Snap13

Give the connection name as ‘HRConn’ and JNDI name as ‘jdbc/HRConnDS’ for the data source

Snap14

Give the Database Connection details and click on Next

Snap15

Click on Test Configuration which shows a success message for the successful connection. Click on Finish.

Snap16

Click on DbAdapter from the deployments

Snap5

Click on Configuration -> Outbound Connection pools -> New and then create an outbound connection

Snap7

Click on Next

Snap8

Give the JNDI name for the Outbound connection as eis/DB/HRConn

Snap20

Click on the Created Outbound Connection Pool

Snap9

Give¬†the property ¬†value for XA Data Source name as with earlier created¬†DataSource jndi name ‘jdbc/HRConnDS’ and click on save

Snap61

Now again go to deployments and select DbAdapter and click on update which ends the DB Adapter Configuration.

Snap62