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Introduction

AquaLogic Data Services Platform can be accessed through an AquaLogic Service Bus Transport. In this way AquaLogic Service Bus can make full use of data services. This approach also allows a more efficient and flexible approach to accessing data services as compared with exposing such services as Web services.

Topics

Use ALSB 2.6.1 if you want to share the same WebLogic home directory with ALDSP.

ALDSP and ALSB Compatability Matrix

Data services created in ALDSP can be accessed through ALSB using the DSP Transport. The following table identifies compatibilities between ALDSP and ALSB releases. In most cases, instructions for making ALDSP Data Services available to ALSB using the DSP transport are provided.

ALSB and ALDSP Version Compatibility

Enabling Data Services for ALSB

To make an ALDSP data service available to an ALSB client you need to:

Generate a WSDL file for your data service and import the new WSDL into ALSB using the recommended procedure.
Configure or create a business service based on the WSDL.
Configure or create a proxy service based on the business service.

After you have completed these tasks you can invoke data services through the appropriate version of ALSB.

From Data Source to Web Service Client

Using the DSP Transport

The example in this section illustrates use of a data service in ALSB using the following versions.

Actions Needed Within ALDSP

Step 1. Start Your Server

Start the AquaLogic Data Services server, if it is not already running.  (For the purpose of this discussion, the sample RetailDataspace provided with AquaLogic Data Service Platform is used.)

See also: Getting started ALDSP tutorial: Creating Your First Data Services

Step 2. Generate a WSDL from the Data Service

You can generate a WSDL from your data service in two ways.

Option A. Generating a WSDL File Using Data Services Studio

Detailed instructions available at: How To Generate a Web Service Map and WSDL from a Data Service

Option B. Export a WSDL Through the ALDSP Console

If a WS file is available, you can use the ALDSP Console to generate a WSDL file.

1. Launch the AquaLogic Data Services Console. On Windows you can do this by choosing:
   

   Start > Programs > BEA Products >  BEA AquaLogic Data Services Platform 3.0 >
       Examples > AquaLogic Data Services Console

        Alternatively, type http://localhost:7001/dspconsole in your Web browser.  

2. Log in. The sample uses 'weblogic' (without quotes) as both the username and password.
3. Click Service Explorer.
4. Navigate to the web service map (example: RetailWebServices.ws) corresponding to the data service for which you want to create the WSDL file.
5. Click View WSDL Definition in the General tab. ALDSP Console opens a new window and displays the WSDL definition.
6. Using a text editor, copy and paste the WSDL definition into a new text document and save the WSDL file.
   

   Getting Started with ALDSP Administration

   If you've not already done so, build your data service application (deployment is automatic with a build). A deployed application is needed in order for a client processes to access data through your data services.

Step 3: Obtaining the Web Service Address

The URL address to the WSDL is needed. To obtain this address in Data Services Studio:

1. Right-click on the WS file (example: OrderService.ws)  
2. Select Test Web Service 
3. When the Test Client opens save the URL address. Here is the address for the OrderService example: 
   

   http://localhost:7001/RetailDataspace/RetailApplication/OrderManagement/OrderService.ws?WSDL
   

Actions Needed within ALSB

Step 4: Import the Data Service WSDL into AquaLogic Service Bus

The following generally describes the steps needed to import a WSDL generated in ALDSP into AquaLogic Service Bus.

1. Start the AquaLogic Service Bus server, if it is not already running. For the purposes of this example, the AquaLogic Service Bus example server and the Default project is used. On Windows you can do this by choosing:

   Start > Programs > BEA Products > Examples > AquaLogic Service Bus > Start Examples Server

2. Launch the AquaLogic Service Bus Console. On Windows, choose:
   

   Start > Programs > BEA Products >  Examples > AquaLogic Service Bus > Service Bus Console

        Alternatively, type http://localhost:7021/sbconsole in your Web browser.  

3. Log in. The default user name and password is 'weblogic' (without quotes).
4. Create a new project (example: dataServiceTest).
5. Click on the name of your new project.
6. In the Project Explorer locate the Create Resource option.
7. From the Select Resource Type dropdown select:

   Bulk > Resources from URL

This opens the wizard from which you can import a WSDL and its associated schema. The following table covers the actions needed to continue the example.

Importing a WSDL as a Bulk Resource 

Load Resources from ALDSP WSDL Import

See also: Loading Resources from a URL

Step 5: Create the Business Service

The following generally describes the steps needed to create a business service from a WSDL imported from ALDSP.

1. In the Project Explorer locate the Create Resource option.
2. From the Select Resource Type dropdown select Business Service.

This opens the wizard from which you can create a business service. The following table covers the actions needed to continue the example.

Creating Business Service for the ALDSP Sample Data Service

See Also: Creating and Configuring Business Services

Step 6: Create the Proxy Service

The following generally describes the steps needed to create a proxy service.

1. In the Project Explorer locate the Create Resource option.
2. From the Select Resource Type dropdown select Proxy Service.

This opens the wizard from which you can create a proxy service. The following table covers the actions needed to continue the example.

Creating a Proxy Service for the ALDSP Sample Data Service

In practice you would most likely identify the encryption key, digital signature key, and SSL client authentication key. However, for the example, none of these need to be identified.

See also: Creating and Configuring Proxy Services

Step 7: Test Your Setup

The following steps would allow you to test access to the ALDSP data service through the proxy generated in the above steps.

1. Activate your session; click Submit.
2. In the Project Explorer locate the created proxy service (example: orderService).
3. Select the Launch Test Console icon under Actions. The Proxy Service Testing console appears.
4. From the Available Operations dropdown select your data service operation (example: getOrderByCustID)
5. Modify the Payload with the information needed by the data service (example: CUSTOMER3)

   <ord:getOrderByCustID xmlns:ord="ld:RetailApplication/OrderManagement/OrderService.ws">
   &nbsp;&nbsp;&nbsp; <ord:custID>CUSTOMER3</ord:custID>
   </ord:getOrderByCustID>

6. Click Execute. The data appears in the response document.

Request and Response from the ALSB Test Console

See Also

Using the AquaLogic Service Bus Console

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