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| <h2 id="index">Getting Started<a id="Getting_Started"></a></h2> |
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| <p>Using JDO requires several components that work together:</p> |
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| <p>a database that stores your data persistently</p> |
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| <p>an application that operates through the JDO layers on the database</p> |
| </li> |
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| <p>a JDO implementation that provides the implementation of the JDO APIs</p> |
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| <p>Java classes (object model) that provide the application view of the data</p> |
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| <p>A good place to start is to define your object model. This is the collection |
| of Java classes that you use to represent the persistent data in your |
| database. Some JDO implementations allow you to create your database schema |
| from your object model. Or you might already have a database and database |
| schema that you can use to derive the object model.</p> |
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| <p>You will also need to define Java classes that implement the application |
| that operates on the object model. The application is responsible for |
| using the JDO implementation classes to define the application view of |
| PersistenceManagerFactory and PersistenceManager.</p> |
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| <p>Next, choose a JDO implementation. You can get information |
| on JDO implementations <a href="impls.html">here</a>. Some factors to consider when choosing |
| a JDO implementation is what databases they support, what Java version |
| they support, and whether they provide tools to create database schema from |
| an object model or create an object model from the database schema.</p> |
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| <div class="paragraph"> |
| <p>Some JDO implementations also package the JDO interfaces as a separate |
| jar file, so there may be no need to download the JDO interfaces from this |
| site.</p> |
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| <p>More information on how to proceed can be found on your JDO implementation site.</p> |
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