Oracle Database Programming Using Java And Web Services Pdf


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oracle database programming using java and web services pdf

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In heterogeneous and disconnected environments, there is an increasing need to access stored procedures, data and metadata, through Web service interfaces. Database Web service technology enables Web services for databases.

Environment: Apache Axis 1.

Jetzt bewerten Jetzt bewerten. Covers fundamental and advanced Java database programmingtechniques for beginning and experienced readers This book covers the practical considerations and applicationsin database programming using Java NetBeans IDE, JavaServer Pages,JavaServer Faces, and Java Beans, and comes complete with authenticexamples and detailed explanations. Two data-action methods are developed and presented in thisimportant resource. With Java Persistence API and plug-in Tools,readers are directed step by step through the entire databaseprogramming development process and will be able to design andbuild …mehr. DE

Oracle Database Programming using Java and Web Services (eBook)

This chapter provides an overview of database Web services and discusses how to call existing Web services. This chapter contains the following sections:. Web services enable application-to-application interaction over the Web, regardless of platform, language, or data formats. Web services usually refers to services implemented and deployed in middle-tier application servers. However, in heterogeneous and disconnected environments, there is an increasing need to access stored procedures, as well as data and metadata, through Web services interfaces.

The Database Web services technology is a database approach to Web services. It works in the following two directions:. Conversely, consuming external Web services from the database, together with integration with the SQL engine, enables Enterprise Information Integration. Web Services use industry-standard mechanisms to provide easy access to remote content and applications, regardless of the platform and location of the provider and implementation and data format.

Client applications can query and retrieve data from Oracle Database and call stored procedures using standard Web service protocols. There is no dependency on Oracle-specific database connectivity protocols.

This approach is highly beneficial in heterogeneous, distributed, and disconnected environments. You can call into the database from a Web service, using the database as a service provider. You can access and manipulate database tables from a Web service client. You can use JPublisher to generate Java wrappers that correspond to database operations and deploy the wrappers as Web services in Oracle Application Server. Exposes existing Java classes deployed in Oracle Database as Web services.

Java classes implementing data-related services can be migrated between the middle tier and the database. Java portability results in database independence. Leverages warehousing or business intelligence queries, data monitoring queries, and any predefined SQL statements as Web services. Offers secure, persistent, transactional, and scalable logging, auditing, and tracking operations implemented through SQL DML, as Web services. The following JPublisher features support Web services call-ins to the code running in Oracle Database:.

You can extend the storage, indexing, and searching capabilities of a relational database to include semistructured and nonstructured data, including Web services, in addition to enabling federated data.

By calling Web services, the database can track, aggregate, refresh, and query dynamic data produced on-demand, such as stock prices, currency exchange rates, and weather information. An example of using Oracle Database as a service consumer would be to call external Web services from a predefined database job to retrieve inventory information from multiple suppliers, and then update your local inventory database.

Another example is that of a Web crawler, where a database job can be scheduled to collate product and price information from a number of sources. Figure illustrates how you can call a Web service from a Java client within the database, using one of the following methods:. Start a Web service through a user-defined function call, which is generated through JPublisher, either directly within a SQL statement or view or through a variable.

This method simplifies the Web service invocation because the location of the service is already known without needing to look up the service in the UDDI registry.

The client proxy class does all the work required to construct the SOAP request, including marshalling and unmarshalling parameters.

Dynamic invocation provides the ability to construct the SOAP request and access the service without the client proxy. To access data that is returned from single or multiple Web service invocations, create a virtual table using a Web service data source.

This table lets you query a set of returned rows as though it were a table. The client calls a Web service and the results are stored in a virtual table in the database. You can pass result sets from function to function. This enables you to set up a sequence of transformation without a table holding intermediate results.

To reduce memory usage, you can return the result set rows, a few at a time, within a function. By using Web services with the table function, you can manipulate a range of input values from single or multiple Web services as a real table. The table expression in the preceding example can be used in other SQL queries, for constructing views, and so on.

Provides an easy-to-use interface for Web services call-outs, thereby insulating developers from low-level SOAP programming. Java classes running in the database can directly call external Web services by using the previously loaded Java proxy class or through dynamic invocation. Enables any SQL-enabled tool or application to transparently and easily consume dynamic data from external Web services. Enables application and data integration by turning external Web service into a SQL data source, making the external Web service appear as regular SQL table.

This table function represents the output of calling external Web services and can be used in a SQL query. It performs the following steps:. A client would not normally access any Web service using the static method directly. For Web services, this option is used behind the scenes by the -proxywsdl option and is set automatically, as appropriate. For typical usage of the -proxywsdl option, the -proxyopts default setting is sufficient.

In situations where you use the -proxyclasses option directly, you may want to use the special -proxyopts settings.

Use this option in conjunction with the -proxywsdl option to specify the Web services endpoint. Use this option to specify the name and password for the superuser account used to grant permissions for the client proxy classes to access Web services using HTTP.

You can change the default action of JPublisher to generate code that uses a user-provided subclass. However, this ResultSet type cannot be published as a Web service. To solve this, create a new method that can return the result set in a Web service-supported format, as follows:.

After creating a method, create an interface that contains the exact methods to publish. You can use JPublisher to easily accomplish this mapping by using the following command:.

Skip Headers. Using Oracle Database as Service Provider for Web Services Web Services use industry-standard mechanisms to provide easy access to remote content and applications, regardless of the platform and location of the provider and implementation and data format. Using Oracle Database as Service Consumer for Web Services You can extend the storage, indexing, and searching capabilities of a relational database to include semistructured and nonstructured data, including Web services, in addition to enabling federated data.

You can use a Web services data source to process the results from any Web service request. Web Service Data Sources Virtual Table Support To access data that is returned from single or multiple Web service invocations, create a virtual table using a Web service data source. Figure illustrates the support for virtual table. Using Web services data source Enables application and data integration by turning external Web service into a SQL data source, making the external Web service appear as regular SQL table.

Note: The -proxywsdl option uses the -proxyclasses option behind the scenes for steps 2 and 3, and takes the -proxyopts setting as input. In the preceding command: MyApp contains the method to return the result set. MyAppInterf is the interface that contains the method to publish. Book List. Master Index. Contact Us.

Oracle Database Programming using Java and Web Services

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Here is the first chapter , the Table Of Content , the code samples at OTN and at the publisher's web site , and a reader's review. FYI Tried to add your RSS feed to my yahoo using the add button to the right of your main page and got the error "could not find RSS file - please tell webmaster" paraphrase Very interested to read your book - it's on order. Regards, Hugo. Oops, Hugo was right. On Amazon.


Part V: Programming the Oracle Database with Web Services. 14 Web englishdistrictlifeline.org 3.


[PDF Download] Oracle Database Programming using Java and Web Services [Download] Online

The traditional division of labor between the database which only stores and manages SQL and XML data for fast, easy data search and retrieval and the application server which runs application or business logic, and presentation logic is obsolete. NET Languages 1. More importantly, however, it has continued to find a larger audience over time, as people discover just how useful it is in solving their real world problems both efficiently and easily. This book is an important and welcome step forward to helping Java developers make even better use of the Oracle database.

From the menu that appears, select Create Database: 1.

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Oracle Database Programming using Java and Web Services (eBook)

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