Create Datamart. Alessandro Taurelli 2010/06/15 13:41

Transcription

1 Create Datamart Alessandro Taurelli 2010/06/15 13:41

2 Table of Contents Create Datamart Reverse engineering the target database schema Hibernate mapping adjustement jar production for datamart representation Page 2 - last modified by Alessandro Taurelli on 2010/06/15 13:41

3 Create Datamart The datamart is a data abstraction model built by means of Hibernate Tools. The main steps are: 1 Reverse engineering the target database schema 2 Hibernate mapping adjustement 3 jar production for datamart representation 1 Reverse engineering the target database schema In order to reverse engineering your target database scheme you need an Eclpise IDE with Hibernate Tools plugin already installed. Hibernate Tools can be downloaded here. Once you have installed succesfully the pluging in your Eclipse IDE you can follow these steps in order to reverse engineering your database schema... Start Eclipse and create a new Java Project Page 3 - last modified by Alessandro Taurelli on 2010/06/15 13:41

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5 Create a new Hibernate Configuration file under src folder(file Menu -> New -> Other then Hibernate -> Hibernate configuration file) Page 5 - last modified by Alessandro Taurelli on 2010/06/15 13:41

6 Page 6 - last modified by Alessandro Taurelli on 2010/06/15 13:41

7 Choose the right dialect for your database and fill all the required fields (driver class, connection string, schema, username and password). Then check 'create console configuration' and press 'Next'. Page 7 - last modified by Alessandro Taurelli on 2010/06/15 13:41

8 Fill the console name field and in the 'option' tab set the db dialect Page 8 - last modified by Alessandro Taurelli on 2010/06/15 13:41

9 In the 'classpath' include in the default classpath the proper jdbc driver for your target database than click 'Finish' Page 9 - last modified by Alessandro Taurelli on 2010/06/15 13:41

10 Select "Hibernate Code Generation Configuration..." from menu Run->Hibernate Code Generation... Page 10 - last modified by Alessandro Taurelli on 2010/06/15 13:41

11 Create a new configuration for the code generation task Page 11 - last modified by Alessandro Taurelli on 2010/06/15 13:41

12 Set the name of the newly created configuration Select as console configuration the hibernate configuration previusly created (demo in this example) Select project's src dir as 'Output directory' Set the package name of the generated code (it.foodmart in this example) Set the field 'reveng.strategy' with the value: org.hibernate.cfg.reveng.delegatingreverseengineeringstrategy Page 12 - last modified by Alessandro Taurelli on 2010/06/15 13:41

13 If you want to reverse engineering only some tables and not the full schema create a new reveng.xml file. To filter tables click on 'Refresh' button and then wait until the full database schema is shown. At this point is possible to choose which table to include in the code generation process. Once finished click on 'Finish' Page 13 - last modified by Alessandro Taurelli on 2010/06/15 13:41

14 In the 'Exporters' section check options as follow... Page 14 - last modified by Alessandro Taurelli on 2010/06/15 13:41

15 Click on the 'Apply' button to save configuration and on the 'Run' button to execut the code generation process Refresh the project (F5) and check out the newly created mappings and objects Page 15 - last modified by Alessandro Taurelli on 2010/06/15 13:41

16 2 Hibernate mapping adjustement If you want to customize labels and tooltips associated to each item in your datamart structure you create a label.properties file in the root of your java project Page 16 - last modified by Alessandro Taurelli on 2010/06/15 13:41

17 If you need to localize labels and tooltips associated to each item in your datamart structure create a label_loacle.properties for each locale you need to support (ex. label_it.properties, label_en.properties, label_fr.properties, ecc...) Create in the project root folder a file named qbe.properties for changing the visual representation of schema items (visibility, icons, position, ecc...) Page 17 - last modified by Alessandro Taurelli on 2010/06/15 13:41

18 3 jar production for datamart representation Export the project as a jar file (menu File->Export...->Java->Jar) named datamart.jar Page 18 - last modified by Alessandro Taurelli on 2010/06/15 13:41

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