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This section explains how to attach a custom workflow to the application registration operation in the API Manager. First, see Workflow Extensions for information on different types of workflow executors.

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1. Download WSO2 Business Process Server.

2. Set an offset of 2 to the default BPS port in the <BPS_HOME>/repository/conf/carbon.xml file. This prevents port conflicts that occur when you start more than one WSO2 product on the same server. For more information, see Changing the Default Ports with Offset.

   Code Block
   language xml
   <Offset>2</Offset>

   Tip
   Tip: If you change the BPS port offset to a value other than 2 or run the API Manager and BPS on different machines (therefore, want to set the hostname to a different value than localhost), you do the following: Search and replace the value 9765 in all the files (.epr) inside <APIM_HOME>/business-processes folder with the new port (9763 + port offset.)

3. Open the <BPS_HOME>/repository/conf/humantask.xml file and the <BPS_HOME>/repository/conf/b4p-coordination-config.xml file and set the TaskCoordinationEnabled property to true.

   Code Block
   language xml
   <TaskCoordinationEnabled>true</TaskCoordinationEnabled>

4. Copy the following from the <API-M_HOME>/business-processes/epr folder to the <BPS_HOME>/repository/conf/epr folder. 
   If the <BPS_HOME>/repository/conf/epr folder does not exist, create it.

   Note
   Make sure you give the correct credentials in the <BPS_HOME>/repository/conf/epr files.

   • RegistrationService.epr
   • RegistrationCallbackService.epr

5. Start the BPS server and log in to its management console (https://<Server Host>:9443+<port offset>/carbon). 

   Warning

   If you are using Mac OS with High Sierra, you may encounter following warning when login into the Management console due to a compression issue exists in High Sierra SDK. Code Block WARN {org.owasp.csrfguard.log.JavaLogger} - potential cross-site request forgery (CSRF) attack thwarted (user:<anonymous>, ip:xxx.xxx.xx.xx, method:POST, uri:/carbon/admin/login_action.jsp, error:required token is missing from the request) To avoid this issue open <BPS_HOME>/repository/conf/tomcat/catalina-server.xml and change the compression="on" to compression="off" in Connector configuration and restart the BPS.

6. Log into Management console of WSO2 BPS, select Add > BPEL under the Processes menu and upload the <APIM_HOME>/business-processes/application-registration/BPEL/ApplicationRegistrationWorkflowProcess_1.0.0.zip file to BPS. This is the business process archive file.
   
7. Select Add under the Human Tasks menu and upload the <APIM_HOME>/business-processes/application-registration/HumanTask/ApplicationRegistrationTask-1.0.0.zip file to BPS. This is the human task archived file.
   

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