iSeries Access for Web V5R2 and WebSphere Host Publisher V4.0

214 iSeries Access for Web V5R2 and WebSphere Host Publisher V4.0

4. Use the WebSphere Studio tool to create a Web Service. See 6.8.5, “Creating Web

Services support in Host Publisher Studio” on page 214.

5. Generate a sample application and run it to test your Web Service.

6. Complete development and testing of the application you imported in step 3.

7. Deploy the completed application. See 6.9.2, “Deploying Enterprise JavaBeans” on

page 238.

6.8.3 Accessing Host Publisher from a remote machine using Web Services

You may want to write a program that does not execute in WebSphere but that requires

access to an Integration Object. In earlier versions of Host Publisher, you developed Remote

Integration Objects (RIOs) to access Integration Object data from a Java program (applet or

application) running on a remote machine. With the current version, you can use Web

Services to perform this same function.

The primary advantages of using Web Services over RIOs are:

 Web Services are strategic. Communication is based on a current, industry-standard suite

of standards, APIs, and implementations such as Web Services technology framework or

service-oriented architecture (SOA). They are based on the self-describing Web Service

Description Language (WSDL), which is a descriptive interface and protocol binding

language.

 The messaging of Web Services is XML messaging, based on the industry standard

Simple Object Access Protocol (SOAP). SOAP is language-independent and

interoperable between different programming languages executing on different operating

systems.

 Web Services can be published and dynamically located. Universal Description,

Discovery, and Integration (UDDI) is a registry mechanism that you can use to perform

lookups for Web Services descriptions. After lookup, a client application can dynamically

bind directly to Web Services provided by the service provider.

6.8.4 Specifying properties for Web Services Integration Objects

In Host Access and Database Access, the Options menu has a Web Services Integration

Object Properties selection. This option specifies file suffixes that are added to the names of

the files (.class files and .java files) associated with the Integration Object. The suffixes help

you easily locate the Web Services-specific files that are generated by Host Publisher Studio.

Default suffixes are provided, but you can use the Web Services Integration Objects

Properties option to specify different suffixes for the Web Services Integration Object you are

currently working on.

The default suffixes are:

 Properties for the Properties Object file

 Helper for the Helper Object

To change the default suffixes for all Web Services Integration Objects, edit the Studio.ini file.

6.8.5 Creating Web Services support in Host Publisher Studio

To create Web Services support, follow these steps:

1. To create Web Services support for a Host Publisher Integration Object, select the new

Create Web Services Integration Object Support option in Host Access or DB Access

(see Figure 6-84). This creates: