New PDF release: Advanced J2EE Platform Development: Applying Integration

By Torbjörn Dahlén, Thorbiörn Fritzon

ISBN-10: 0130449121

ISBN-13: 9780130449122

This publication makes a speciality of integrating J2EE with mainframe functions. The styles defined within the ebook reveal tips on how to encapsulate an integration tier that shields the J2EE parts of an program from the legacy components, so Java functions can make the most of latest mainframe code.

The e-book is going via a real-life instance through describing a banking integration venture. With this instance it describes the typical integration styles, DTO, DAO, neighborhood Transaction Cache, and so on. one of many significant issues the authors make is the convenience from having a typical area version around the firm. the typical area version will supply a constant company facts version throughout an firm for all clients, so all people within the association could have a typical vocabulary.

If you're a Java developer who's concerned with integrating mainframe software this publication is a wonderful source to have at the topic. This ebook is a concise and sensible consultant to firm integration.

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Additional resources for Advanced J2EE Platform Development: Applying Integration Tier Patterns

Sample text

It is important to realize that the interface of the Data Access Object must not provide any services beyond what would be expected from any data source. Normally, these services are creating, reading, updating, deleting, and searching. By keeping strictly to this set of services, the ability of the Data Access Object to adapt to new data sources can be maximized. 11 shows a session bean consisting of two Data Access Objects. Each Data Access Object manages Transfer Object instances of a different class, each containing data from three different data sources.

PREPARE TO COMMIT: If every update is successful, a PREPARE TO COMMIT is performed on the different data sources, querying them as to whether a COMMIT for this transaction will succeed. If a COMMIT is possible, the data sources acknowledge the PREPARE TO COMMIT. 4. COMMIT or ROLLBACK: If everything have succeeded up to this point, a COMMIT is performed on the data sources, thus acknowledging the updates and making them available to all other users. If anything has failed, a ROLLBACK is immediately performed, voiding any operations that have been performed since the BEGIN statement; any other users can detect no change in the data.

Furthermore, standardizing the interface of the Data Access Object allows the final decoupling of the application from the information structure of the legacy system. It is important to realize that the interface of the Data Access Object must not provide any services beyond what would be expected from any data source. Normally, these services are creating, reading, updating, deleting, and searching. By keeping strictly to this set of services, the ability of the Data Access Object to adapt to new data sources can be maximized.

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Advanced J2EE Platform Development: Applying Integration Tier Patterns by Torbjörn Dahlén, Thorbiörn Fritzon


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