Calling a Web Service From The Database. An Oracle JDeveloper How To Document.

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Written by Susan Duncan. March, 2. 00. 4. Contents. Introduction. Install SOAP Client Stack in Oracle Database.

Grant Java Permissions to HR Schema. Publish and Run Hello. World Java Class as Web Service. Create a client- side proxy to call the web service.

Load the Java classes into the database. Test your Web Service Call. Troubleshooting. Conclusion. Introduction. Web services allow applications to programatically access remote content and application functionality using industry- standard mechanisms, without any dependency on the provider's platform, the location, the service implementation, or the data format. Database Web services work in two directions: database as service provider, i.

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It gives step by step instructions for loading these files into the database and testing the call out to a web service running in Oracle Containers for Java (OC4. J). It uses a very simple Hello. World service as an example. It gives tips on testing and debugging the service. Full details of all the features of JDeveloper discussed in this article can be found in the JDeveloper Help documentation. Install SOAP Client Stack in Oracle Database.

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This is a one- off install to enable calls from the database to web services. If you have already installed SOAP Client Stack, skip this section. For detailed instructions on installing the stack see. Install JAR Files In the Database. Microsoft Word Picture Layout Grayed Out App here. Grant Java Permissions to HR Schema.

Your schema needs the correct Java 2 Permissions. See Chapter. 9 (Security) of the. Database Java Developer's Guide for a detailed explanation.

You can check whether the correct permissions already exist using the table browser (see step 4). The example in this How. To uses the HR schema, you might set the permissions as follows. Paste the snippet into the SQL Worksheet and click the SQL Run icon.

Move to the Data tab). Repeat for other permissions. To permanently delete a permission first disable and then delete. However, to follow this How. To here are some tips to create and deploy a web service based on the Hello. World Java class.

Create Hello. World Java class. Hello. World. . See the. Database Java Developer's Guide for more detail. String call. WS(String s).

If you want to load the Java source files (and have the database compile them) you need to change this and load the files from the Project Source Path. You might want to do this while you are in development or perhaps debugging so that you can update and replace files and be sure that they are re- compiled from the latest source. This creates a PL/SQL wrapper function to call. WS Java method that you use to call the service from your database applications. Select the call. WS method. Note that, as a static method, it is the only method that can be published as a stored procedure. Click OK to create the SQL file.

Use the context menu of the new call. WS function in the Navigator to preview the generated SQL statement. Adjust the size of the returned String (v.

You should be able to access the service using the OC4. J test harness. See. Grant Java Permissions to HR Schema. Conclusion and where to get more information. Although the initial release of JDeveloper 1.

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