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| <h1>Injection of DataSource Example |
| |
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| |
| <p><a name="InjectionofDataSourceExample-Overview"></a></p> |
| |
| <h1>Overview</h1> |
| |
| <p><div class="span">:style=float: right; margin-left: 20px;}<div class="html">}</p> |
| |
| <p><object width="400" height="250"><param name="movie" |
| value="http://www.youtube.com/v/g3lIPlegDJk?fs=1&hl=en_US&rel=0"></param><param |
| name="allowFullScreen" value="true"></param><param name="allowscriptaccess" |
| value="always"></param><embed |
| src="http://www.youtube.com/v/g3lIPlegDJk?fs=1&hl=en_US&rel=0" |
| type="application/x-shockwave-flash" allowscriptaccess="always" |
| allowfullscreen="true" width="400" height="250"></embed></object> |
| <div class="html">}<div class="span">}<div class="div">} |
| In this example we use the <em>@Resource</em> annotation to inject a |
| <em>javax.sql.DataSource</em> into our bean. The trickiest thing about injecting |
| a DataSource is not declaring the annotation, but actually configuring the |
| data source.</p> |
| |
| <p>In OpenEJB the rules are quite simple. An declaration like the following |
| in code:</p> |
| |
| <pre><code>@Resource DataSource customerDataSource; |
| </code></pre> |
| |
| <p>Matches a data source declared as follows in the openejb.xml file:</p> |
| |
| <pre><code><Resource type="DataSource" id="customerDataSource"> |
| .... |
| </Resource> |
| </code></pre> |
| |
| <p>As seen in this example, the data source can also be declared via |
| properties as follows:</p> |
| |
| <pre><code>customerDataSource = new://Resource?type=DataSource |
| </code></pre> |
| |
| <p>This style of properties creation can be used in the InitialContext |
| properties, set into the System properties, or passed in on the command |
| line as vm properties.</p> |
| |
| <p><em>The source for this example is in the "injection-of-datasource" directory |
| located in the <a href="openejb:download.html">openejb-examples.zip</a> |
| available on the <a href="http://tomee.apache.org/downloads.html">download page</a>.</em><div class="div">}<div class="div">:style=clear:both;}{div}</p> |
| |
| <p><a name="InjectionofDataSourceExample-TheCode"></a></p> |
| |
| <h1>The Code</h1> |
| |
| <p><div class="snippet">:id=code|url=openejb3/examples/injection-of-datasource/src/main/java/org/superbiz/injection/MoviesImpl.java|lang=java}</p> |
| |
| <p><a name="InjectionofDataSourceExample-Writingaunittestfortheexample"></a></p> |
| |
| <h1>Writing a unit test for the example</h1> |
| |
| <p><div class="snippet">:id=code|url=openejb3/examples/injection-of-datasource/src/test/java/org/superbiz/injection/MoviesTest.java|lang=java}</p> |
| |
| <p>Note in the above test code the following lines:</p> |
| |
| <pre><code>p.put("movieDatabase", "new://Resource?type=DataSource"); |
| p.put("movieDatabase.JdbcDriver", "org.hsqldb.jdbcDriver"); |
| p.put("movieDatabase.JdbcUrl", "jdbc:hsqldb:mem:moviedb"); |
| </code></pre> |
| |
| <p>As mentioned these actually create and configure the data source. When |
| OpenEJB boots up, these properties will get read and executed allowing you |
| to keep all the configuration required to run your tests right in the test |
| case itself. No need to keep dozens of openejb.xml config files in your |
| projects or try and create one big configuration that might end up loading |
| a lot of unneeded containers and resources. </p> |
| |
| <p>In your production system you can place the properties into the |
| OPENEJB_HOME/conf/system.properties file or add them to your |
| OPENEJB_HOME/conf/openejb.xml with a declaration like so:</p> |
| |
| <pre><code><Resource type="DataSource" id="movieDatabase"> |
| JdbcDriver = org.hsqldb.jdbcDriver |
| JdbcUrl = jdbc:hsqldb:mem:moviedb |
| </Resource> |
| </code></pre> |
| |
| <p><a name="InjectionofDataSourceExample-Running"></a></p> |
| |
| <h1>Running</h1> |
| |
| <p>Running the example is fairly simple. In the "injection-of-datasource" |
| directory of the <a href="openejb:download.html">examples zip</a> |
| , just run:</p> |
| |
| <blockquote> |
| <p>$ mvn clean install</p> |
| </blockquote> |
| |
| <p>Which should create output like the following.</p> |
| |
| <pre><code>------------------------------------------------------- |
| T E S T S |
| ------------------------------------------------------- |
| Running org.superbiz.injection.MoviesTest |
| Apache OpenEJB 3.0 build: 20080408-04:13 |
| http://tomee.apache.org/ |
| INFO - openejb.home = |
| </code></pre> |
| |
| <p>/Users/dblevins/work/openejb-3.0/examples/injection-of-datasource |
| INFO - openejb.base = |
| /Users/dblevins/work/openejb-3.0/examples/injection-of-datasource |
| INFO - Configuring Service(id=Default Security Service, |
| type=SecurityService, provider-id=Default Security Service) |
| INFO - Configuring Service(id=Default Transaction Manager, |
| type=TransactionManager, provider-id=Default Transaction Manager) |
| INFO - Configuring Service(id=movieDatabase, type=Resource, |
| provider-id=Default JDBC Database) |
| INFO - Configuring Service(id=Default JDK 1.3 ProxyFactory, |
| type=ProxyFactory, provider-id=Default JDK 1.3 ProxyFactory) |
| INFO - Found EjbModule in classpath: |
| /Users/dblevins/work/openejb-3.0/examples/injection-of-datasource/target/classes |
| INFO - Configuring app: |
| /Users/dblevins/work/openejb-3.0/examples/injection-of-datasource/target/classes |
| INFO - Configuring Service(id=Default Stateful Container, type=Container, |
| provider-id=Default Stateful Container) |
| INFO - Auto-creating a container for bean Movies: Container(type=STATEFUL, |
| id=Default Stateful Container) |
| INFO - Auto-linking resource-ref |
| 'org.superbiz.injection.MoviesImpl/movieDatabase' in bean Movies to |
| Resource(id=movieDatabase) |
| INFO - Loaded Module: |
| /Users/dblevins/work/openejb-3.0/examples/injection-of-datasource/target/classes |
| INFO - Assembling app: |
| /Users/dblevins/work/openejb-3.0/examples/injection-of-datasource/target/classes |
| INFO - Jndi(name=MoviesLocal) --> Ejb(deployment-id=Movies) |
| INFO - Created Ejb(deployment-id=Movies, ejb-name=Movies, container=Default |
| Stateful Container) |
| INFO - Deployed |
| Application(path=/Users/dblevins/work/openejb-3.0/examples/injection-of-datasource/target/classes) |
| Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.911 sec</p> |
| |
| <pre><code>Results : |
| |
| Tests run: 1, Failures: 0, Errors: 0, Skipped: 0 |
| </code></pre> |
| |
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