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The following scenario simulates a simple leave approval business process, in which an employee fills a form and submits the leave request to the manager and the manager approves or rejects it. The employee receives an email if the manager approves the request. Otherwise, if the manager rejects it, the employee will be able to resend the leave request by adjusting it. 

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Tip

Before you begin,

  • Install Oracle Java SE Development Kit (JDK) version 1.8.* and set the JAVA_HOME environment variable.
  • Download the product installer from here, and run the installer.
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    Installing the Product
    Installing the Product
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  • Select and download the relevant Enterprise Integrator tooling ZIP file depending on your operating system from here, and then extract the ZIP file. The path to this folder will be referred to as <EI_TOOLING> throughout this tutorial.

    Info

Let's get started! This tutorial includes the following sections:

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  1. Download the pre-packaged project and extract it to a preferred location. This contains the artifacts of the Working with Mail Tasks tutorial. 
  2. Open the WSO2 EI Tooling environmentIntegration Studio.
  3. Click File, and click Import. 
  4. Expand the WSO2 category, select Existing WSO2 Projects into workspace and click Next.
  5. Click Browse, select the file you extracted and upload it.  
  6. In the Package Explorer, double click on the name of the BPMN diagram to view the BPMN artifacts you imported.

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  1. Drag and drop a Timer Boundary Event from the Boundary event tab of the Palette, and place it above the Review leave request User Task.


  2. Click on the Timer Boundary Event and click the Main config section of the Properties tab.
  3. Change the value of the Cancel activity field to false since you are not going to cancel the existing User Task, and enter a value  in the ISO_8601 format for the Time duration, within which you want the escalation to happen (e.g., PT60S for 60 seconds).


  4. Add a new Mail Task to the diagram. This will send an escalation email.
  5. Click on the Mail Task, and change the value of the Name field to Send escalation email in the General section of the Properties tab. 


  6. Hover your mouse pointer over the  Timer Boundary Event, and click on the arrow icon (i.e., the Create Connection option) and connect it to the Send escalation email Mail Task.


  7. Add a Terminate End Event and connect the Send escalation email Mail Task to it.

  8. Press Ctrl+S to save Save all the artifacts , which that you created in WSO2 EI ToolingIntegration Studio.
    The model is now complete as the necessary logic has been applied.

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  1. In the Main Config section of the Properties tab (of the Send escalation email  Mail Task), fill the respective fields (i.e., To, From, Subject). You can give the Pending Leave Requests.
  2. In the Non-HTML field of the Main Config section, enter Please approve the pending leave requests. The variable will be used to create the email body.

  3. Copy the following JAR files into the<EI_HOME>/lib directory and restart the Business Process profile server instance. 

  4. In the <EI_HOME>/wso2/business-process/conf/activiti.xml file, add the following properties under the <bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration"> property as shown below, to enable the Gmail configurations.

    • Replace the mailServerHost and mailServerPort property values as follows:

      Code Block
      languagexml
      <property name="mailServerHost" value="smtp.gmail.com"/>
<property name="mailServerPort" value="587"/>

    • Add the following properties:

      Code Block
      languagexml
      <property name="mailServerDefaultFrom" value="<ENTER_A_VALID_SMTP_EMAIL_ADDRESS>"/>
<property name="mailServerUseTLS" value="true"/>
<property name="mailServerUsername" value="<ENTER_A_VALID_SMTP_EMAIL_ADDRESS>"/>
<property name="mailServerPassword" value="<ENTER_THE_EMAIL_PASSWORD>"/>
      Info

      If you are using Gmail to try out this scenario, you may need to enable IMAP access for Gmail. For more information, see Enable IMAP settings in Gmail. Also, if you receive an authentication error, you may have to adjust your account access settings in Gmail as well. For more information, see Allowing less secure apps to access your account.

Deploying the artifacts

  1. For instructions on creating the deployable artifacts, see Creating the deployable archive.
  2. For instructions on deploying them, see Deploying BPMN artifacts.

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  1. If you have not started WSO2 EI previously, start it.

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    titleOn MacOS/Linux/CentOS

    Open a terminal and execute the following command:

    Code Block
    wso2ei-6.4.0-business-process
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    titleOn Windows

    Go to Start Menu -> Programs -> WSO2 -> Enterprise Integrator 6.4.0 Business Process. This will open a terminal and start the business process profile.

  2. Log in to the Management Console of the Business Process profile.
  3. Click Configure → Users and Roles → Add → Add New User.

  4. Enter the below details to create a user called manager and click Next.

    Tip

    Enter both the User Name and the Password as manager.


  5. In the next screen, assign the user to the admin role and click Finish.

    You view the new user you created as shown below.

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