A Comprehensive Guide to IBM WebSphere Host Publisher Version 3.5

Chapter 11. Composite applications 327

4. A statement is added to this page to store the department number in the

HTTP session.

5. When execution page 2 runs, it extracts the department number from the

HTTP connection session; the number is passed as input to the second

Integration Object.

6. The second Integration Object returns all members in the department.

7. Results are displayed.

Note: This method requires no interaction with the end user and does not

demand that the two pages be adjacent to each other in the logical page

hierarchy in your Web site.

11.4.1 Recommended procedure

To create this type of composite application using the Host Publisher Studio

wizards, follow these steps:

1. Create a new application.

2. Import the Integration Objects into the project.

3. For the first Integration Object, specify that it should be executed on page

execute1. If it has inputs to satisfy, create an input form on page input1. Do

not render any of this Integration Object's output.

4. For the second Integration Object, specify that it should be executed on page

execute2. Satisfy its inputs from the outputs of the first Integration Object. You

can render the output of the Integration Object on this same page (execute2).

When you complete the wizards, a statement will be added to the execute1 page

to insert the Integration Object's output into the HTTP session. In execute2, the

value is extracted from the HTTP session and set as input to the second

Integration Object. You must ensure that execute2 occurs after execute1 in your

page hierarchy.

11.5 Developing composite applications

So far, all examples of applications created with IBM WebSphere Host Publisher

were of a very simple type. An HTML page is sent to the user asking him/her to

enter a search value, a connection to a host application is established, a host

transaction is started, and the result of the host transaction is displayed to the

user in an HTML page. Although some applications may be that simple, most will

be more complex and require interaction with the user before the final result can

be obtained.