ADF Taskflow Activity Tutorial: Call and Return 3

Table of Contents:

1. Introduction
2. Task Flow Call Activity 2.1 Navigating to Another Task Flow 2.2 Returning to the Original Calling Task Flow
3. Written Activity 3.1 Navigating to Another View 3.2 Returning a Value to the Calling Task Flow
4. Passing a Written Parameter 4.1 Setting the Return Value in the Task Flow 4.2 Populating the Value on the Save Action
5. Creating a Managed Bean and Binding
6. Setting the Value in the Written Parameter 6.1 Using the Set Property Listener
7. Storing the Value in Page Flow Scope
8. Using the Return Value in the Calling Task Flow
9. Displaying the Return Value
10. Recap and Conclusion

Task Flow Call and Written Activity in ADF

The use of task flow call and written activity in Oracle's Application Development Framework (ADF) provides a seamless way to navigate between task flows and return values to the calling task flow. In this tutorial, we will Delve into these concepts and explore how to pass a written parameter.

Introduction

In any application development, efficient navigation between different task flows is crucial. ADF offers the task flow call activity to achieve this seamless transition. Additionally, returning values from the called task flow to the original calling task flow provides Meaningful interactions for users.

Task Flow Call Activity

Navigating to Another Task Flow

The task flow call activity allows You to easily navigate from one task flow to another. By invoking this activity, you can switch to a different task flow and Continue the flow of your application. This feature is particularly useful when you want to modularize your application into smaller, reusable components.

Returning to the Original Calling Task Flow

After navigating to another task flow, it's essential to be able to return to the original calling task flow. ADF provides the written activity for this purpose. It allows you to define the flow to return to and resume the execution.

Written Activity

Navigating to Another View

In addition to returning to the calling task flow, the written activity enables navigation to a different view within the original calling task flow. This allows for more flexibility in presenting data or capturing user input.

Returning a Value to the Calling Task Flow

One of the key advantages of the written activity is the ability to return a value. This value can be used in the calling task flow to provide informative feedback or drive further actions. In the next section, we will explore how to pass a written parameter and utilize the return value.

Passing a Written Parameter

A written parameter allows you to pass a value from the called task flow back to the original calling task flow. This can be especially useful when you need to exchange data between task flows or update information Based on user interactions.

Setting the Return Value in the Task Flow

To utilize the written parameter, you first need to define the return value in the called task flow. This involves specifying the Type of the value and setting its actual content in the task flow logic.

Populating the Value on the Save Action

When the user performs a save action in the called task flow, you can capture the necessary value and populate it in the written parameter. This ensures that the return value is correctly assigned and can be accessed in the calling task flow.

Creating a Managed Bean and Binding

To facilitate the communication between components, it is advisable to Create a managed bean and establish a binding for the Relevant component. This allows you to access the value entered by the user and manipulate it as needed.

Setting the Value in the Written Parameter

To pass the value to the written parameter, you can use a set property listener. This listener captures the value from the user and assigns it to the appropriate property, thus ensuring that it is correctly transferred to the return value.

Using the Set Property Listener

To capture the value from the user, you can leverage a set property listener. This listener binds to the input component and extracts the entered value, allowing you to set it in the written parameter.

Storing the Value in Page Flow Scope

Once the value is received in the calling task flow, it is recommended to store it in the page flow scope. This enables easy access to the value throughout the task flow, ensuring its availability in other views or components.

Using the Return Value in the Calling Task Flow

With the value stored in the page flow scope, you can utilize it in various ways within the calling task flow. Whether displaying it to the user, manipulating it further, or passing it to other components, the return value provides invaluable information for the application.

Displaying the Return Value

To provide a seamless user experience, it's important to display the return value in an informative manner. By incorporating the value into relevant views or messages, users can easily understand the outcome of their interactions.

Recap and Conclusion

In this tutorial, we explored the concepts of task flow call and written activity in ADF. We learned how to navigate between task flows, return values, and pass written parameters. By utilizing these functionalities, you can create dynamic and interactive user experiences in your ADF applications.

Always remember to structure your task flows effectively, handle errors gracefully, and provide clear feedback to users. With these techniques, you can ensure a smooth and intuitive application flow.