Raible's Wiki: CreateDAO

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* [5] Notify Hibernate that this object exists in ServiceLocator (for tests) and in hibernate.cfg.xml (for webapp)

* [5] Notify Spring/Hibernate that this object exists in src/dao/**/hibernate/applicationContext-hibernate.xml

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The first thing we need to do is create an object to persist. Let's create a simple "Person" object (in the src/ejb/**/persistence directory) that has an id, a firstName and a lastName (as properties).

The first thing we need to do is create an object to persist. Let's create a simple "Person" object (in the src/dao/**/model directory) that has an id, a firstName and a lastName (as properties).

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package org.appfuse.persistence;

package org.appfuse.model;

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In the code snippet above, we're extending [BaseObject|http://raibledesigns.com/downloads/appfuse/api/org/appfuse/persistence/BaseObject.java.html] because it has the following useful methods: toString(), equals(), hashCode() - the latter two

In the code snippet above, we're extending [BaseObject|http://raibledesigns.com/downloads/appfuse/api/org/appfuse/model/BaseObject.java.html] because it has the following useful methods: toString(), equals(), hashCode() - the latter two

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;:%%(color: blue)''I try to remember to add the Person object to ServiceLocator.java and hibernate.cfg.xml at this point. This is covered in [step 5|5].''%%

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If you want to look at the Person.hbm.xml file that Hibernate generates for you, look in the build/ejb/gen/**/persistence directory. Here's the contents of Person.hbm.xml (so far):

If you want to look at the Person.hbm.xml file that Hibernate generates for you, look in the build/dao/gen/**/hibernate directory. Here's the contents of Person.hbm.xml (so far):

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name="org.appfuse.persistence.Person"

name="org.appfuse.model.Person"

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To start, create a PersonDaoTest.java class in the test/ejb/**/persistence directory. This class should extend [BaseDaoTestCase|http://raibledesigns.com/downloads/appfuse/api/org/appfuse/persistence/BaseDaoTestCase.java.html], which already exists in this package. This parent class is mainly used for automatically loading a .properties file (ResourceBundle) that has the same name as your *Test.class. In this example, if you put a PersonDaoTest.properties file in the same directory as PersonDaoTest.java, this file's properties will be available via an "rd" variable.

To start, create a PersonDaoTest.java class in the test/dao/**/persistence directory. This class should extend [BaseDaoTestCase|http://raibledesigns.com/downloads/appfuse/api/org/appfuse/persistence/BaseDaoTestCase.java.html], which already exists in this package. This parent class is used to load [Spring's|http://www.springframework.org] ApplicationContext (since Spring binds the layers together), and for automatically loading a .properties file (ResourceBundle) that has the same name as your *Test.class. In this example, if you put a PersonDaoTest.properties file in the same directory as PersonDaoTest.java, this file's properties will be available via an "rb" variable.

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//~ Constructors ===========================================================

public PersonDaoTest(String name) {

super(name);

}

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super.setUp();

dao = (PersonDao) DAOFactory.getInstance(conn, PersonDao.class);

log = LogFactory.getLog(PersonDaoTest.class);

dao = (PersonDao) ctx.getBean("personDao");

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super.tearDown();

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The code you see above is what we need for a basic JUnit test that initializes and destroys our PersonDao. The "conn" object is initialized (and obtains a connection) in the [BaseDaoTestCase|http://raibledesigns.com/downloads/appfuse/api/org/appfuse/persistence/BaseDaoTestCase.java.html] class.

The code you see above is what we need for a basic JUnit test that initializes and destroys our PersonDao. The "ctx" object is a reference to Spring's ApplicationContext, which is initialized in the [BaseDaoTestCase|http://raibledesigns.com/downloads/appfuse/api/org/appfuse/persistence/BaseDaoTestCase.java.html] class.

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[{Java2HtmlPlugin

ctx = new ClassPathXmlApplicationContext("/applicationContext.xml");

}]

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First off, create a PersonDao.java interface in the src/ejb/**/persistence directory and specify the basic CRUD methods for any implementation classes. ''I've eliminated the JavaDocs in the class below for display purposes.''

First off, create a PersonDao.java interface in the src/dao/**/persistence directory and specify the basic CRUD methods for any implementation classes. ''I've eliminated the JavaDocs in the class below for display purposes.''

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At this point, you should be able to compile all the source in src/ejb and test/ejb using "ant compile-ejb". However, if you try to run "ant test-ejb -Dtestcase=PersonDao", you will get an error: <span style="color: red">DAOException: no DAOHibernate class</span>.

At this point, you should be able to compile all the source in src/dao and test/dao using "ant compile-dao". However, if you try to run "ant test-dao -Dtestcase=PersonDao", you will get an error: <span style="color: red">DAOException: no DAOHibernate class</span>.

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