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     <div id="main-block" class="container main-block">
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             <div class='page-header'>

               <h1>CDI @Inject</h1>
             </div>
           </div>
         </div>
         <div class="row">

             <div class="col-md-12">
                 <div id="preamble">
 <div class="sectionbody">
 <div class="paragraph">
 <p>To use <code>@Inject</code>, the first thing you need is a <code>META-INF/beans.xml</code> file in the module
 or jar.  This effectively turns on CDI and allows the <code>@Inject</code> references to work.
 No <code>META-INF/beans.xml</code> no injection, period.  This may seem overly strict,
 but it is not without reason.  The CDI API is a bit greedy and does consume a fair
 amount of resources by design.</p>
 </div>
 <div class="paragraph">
 <p>When the container constructs a bean with an <code>@Inject</code> reference,
 it will first find or create the object that will be injected.  For the sake of
 simplicity, the is example has a basic <code>Faculty</code> pojo with a no-arg constructor.  Anyone
 referencing <code>@Inject Faculty</code> will get their own instance of <code>Faculty</code>.  If the desire
 is to share the same instance of <code>Faculty</code>, see the concept of <code>scopes</code>&#8201;&#8212;&#8201;this is
 exactly what scopes are for.</p>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_example">Example</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>In this example, we have an <code>@Stateless</code> bean <code>Course</code> with an <code>@Inject</code> reference to an
 object of type <code>Faculty</code>.  When <code>Course</code> is created, the container will also create an
 instance of <code>Faculty</code>.  The <code>@PostConstruct</code> will be called on the <code>Faculty</code>,
 then the <code>Faculty</code> instance will be injected into the <code>Course</code> bean.  Finally, the
 <code>@PostConstruct</code> will be invoked on <code>Course</code> and then we&#8217;re done.  All instances will
 have been created.</p>
 </div>
 <div class="paragraph">
 <p>The <code>CourseTest</code> test case drives this creation process by having <code>Course</code> injected
 in its <code>@Setup</code> method.  By the time our <code>@Test</code> method is invoked,
 all the real work should be done and we should be ready to go.  In the test case we do
 some basic asserts to ensure everything was constructed, all <code>@PostConstruct</code> methods
 called and everything injected.</p>
 </div>
 <div class="sect2">
 <h3 id="_faculty_a_basic_injectable_pojo">Faculty <small>a basic injectable pojo</small></h3>
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">public class Faculty {

     private List&lt;String&gt; facultyMembers;

     private String facultyName;

     @PostConstruct
     public void initialize() {
         this.facultyMembers = new ArrayList&lt;String&gt;();
         facultyMembers.add("Ian Schultz");
         facultyMembers.add("Diane Reyes");
         facultyName = "Computer Science";
     }

     public List&lt;String&gt; getFacultyMembers() {
         return facultyMembers;
     }

     public String getFacultyName() {
         return facultyName;
     }

 }</code></pre>
 </div>
 </div>
 </div>
 <div class="sect2">
 <h3 id="_course_a_simple_session_bean">Course <small>a simple session bean</small></h3>
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">@Stateless
 public class Course {

     @Inject
     private Faculty faculty;

     private String courseName;

     private int capacity;

     @PostConstruct
     private void init() {
         assert faculty != null;

         // These strings can be externalized
         // We'll see how to do that later
         this.courseName = "CDI 101 - Introduction to CDI";
         this.capacity = 100;
     }

     public String getCourseName() {
         return courseName;
     }

     public int getCapacity() {
         return capacity;
     }

     public Faculty getFaculty() {
         return faculty;
     }
 }</code></pre>
 </div>
 </div>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_test_case">Test Case</h2>
 <div class="sectionbody">
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-java" data-lang="java">public class CourseTest extends TestCase {

     @EJB
     private Course course;

     @Before
     public void setUp() throws Exception {
         EJBContainer.createEJBContainer().getContext().bind("inject", this);
     }

     @Test
     public void test() {

         // Was the EJB injected?
         assertTrue(course != null);

         // Was the Course @PostConstruct called?
         assertNotNull(course.getCourseName());
         assertTrue(course.getCapacity() &gt; 0);

         // Was a Faculty instance injected into Course?
         final Faculty faculty = course.getFaculty();
         assertTrue(faculty != null);

         // Was the @PostConstruct called on Faculty?
         assertEquals(faculty.getFacultyName(), "Computer Science");
         assertEquals(faculty.getFacultyMembers().size(), 2);
     }
 }</code></pre>
 </div>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_running">Running</h2>
 <div class="sectionbody">
 <div class="listingblock">
 <div class="content">
 <pre class="highlight"><code class="language-console" data-lang="console">-------------------------------------------------------
  T E S T S
 -------------------------------------------------------
 Running org.superbiz.cdi.basic.CourseTest
 Apache OpenEJB 4.0.0-beta-1    build: 20111002-04:06
 http://tomee.apache.org/
 INFO - openejb.home = /Users/dblevins/examples/cdi-basic
 INFO - openejb.base = /Users/dblevins/examples/cdi-basic
 INFO - Using 'javax.ejb.embeddable.EJBContainer=true'
 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 - Found EjbModule in classpath: /Users/dblevins/examples/cdi-basic/target/classes
 INFO - Beginning load: /Users/dblevins/examples/cdi-basic/target/classes
 INFO - Configuring enterprise application: /Users/dblevins/examples/cdi-basic
 INFO - Configuring Service(id=Default Managed Container, type=Container, provider-id=Default Managed Container)
 INFO - Auto-creating a container for bean cdi-basic.Comp: Container(type=MANAGED, id=Default Managed Container)
 INFO - Configuring Service(id=Default Stateless Container, type=Container, provider-id=Default Stateless Container)
 INFO - Auto-creating a container for bean Course: Container(type=STATELESS, id=Default Stateless Container)
 INFO - Enterprise application "/Users/dblevins/examples/cdi-basic" loaded.
 INFO - Assembling app: /Users/dblevins/examples/cdi-basic
 INFO - Jndi(name="java:global/cdi-basic/cdi-basic.Comp!org.apache.openejb.BeanContext$Comp")
 INFO - Jndi(name="java:global/cdi-basic/cdi-basic.Comp")
 INFO - Jndi(name="java:global/cdi-basic/Course!org.superbiz.cdi.basic.Course")
 INFO - Jndi(name="java:global/cdi-basic/Course")
 INFO - Jndi(name="java:global/EjbModule1833350875/org.superbiz.cdi.basic.CourseTest!org.superbiz.cdi.basic.CourseTest")
 INFO - Jndi(name="java:global/EjbModule1833350875/org.superbiz.cdi.basic.CourseTest")
 INFO - Created Ejb(deployment-id=Course, ejb-name=Course, container=Default Stateless Container)
 INFO - Created Ejb(deployment-id=cdi-basic.Comp, ejb-name=cdi-basic.Comp, container=Default Managed Container)
 INFO - Created Ejb(deployment-id=org.superbiz.cdi.basic.CourseTest, ejb-name=org.superbiz.cdi.basic.CourseTest, container=Default Managed Container)
 INFO - Started Ejb(deployment-id=Course, ejb-name=Course, container=Default Stateless Container)
 INFO - Started Ejb(deployment-id=cdi-basic.Comp, ejb-name=cdi-basic.Comp, container=Default Managed Container)
 INFO - Started Ejb(deployment-id=org.superbiz.cdi.basic.CourseTest, ejb-name=org.superbiz.cdi.basic.CourseTest, container=Default Managed Container)
 INFO - Deployed Application(path=/Users/dblevins/examples/cdi-basic)
 Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.126 sec

 Results :

 Tests run: 1, Failures: 0, Errors: 0, Skipped: 0</code></pre>
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 <div class="sect1">
 <h2 id="_apis_used">APIs Used</h2>
 <div class="sectionbody">
 <div class="ulist">
 <ul>
 <li>
 <p><a href="../../jakartaee-8.0/javadoc/javax/annotation/PostConstruct.html">javax.annotation.PostConstruct</a></p>
 </li>
 <li>
 <p><a href="../../jakartaee-8.0/javadoc/javax/ejb/EJB.html">javax.ejb.EJB</a></p>
 </li>
 <li>
 <p><a href="../../jakartaee-8.0/javadoc/javax/ejb/Stateless.html">javax.ejb.Stateless</a></p>
 </li>
 <li>
 <p><a href="../../jakartaee-8.0/javadoc/javax/ejb/embeddable/EJBContainer.html">javax.ejb.embeddable.EJBContainer</a></p>
 </li>
 </ul>
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	<div id="main-block" class="container main-block">
	<div class="row title">
	<div class="col-md-12">
	<div class='page-header'>

	<h1>CDI @Inject</h1>
	</div>
	</div>
	</div>
	<div class="row">

	<div class="col-md-12">
	<div id="preamble">
	<div class="sectionbody">
	<div class="paragraph">
	<p>To use <code>@Inject</code>, the first thing you need is a <code>META-INF/beans.xml</code> file in the module
	or jar. This effectively turns on CDI and allows the <code>@Inject</code> references to work.
	No <code>META-INF/beans.xml</code> no injection, period. This may seem overly strict,
	but it is not without reason. The CDI API is a bit greedy and does consume a fair
	amount of resources by design.</p>
	</div>
	<div class="paragraph">
	<p>When the container constructs a bean with an <code>@Inject</code> reference,
	it will first find or create the object that will be injected. For the sake of
	simplicity, the is example has a basic <code>Faculty</code> pojo with a no-arg constructor. Anyone
	referencing <code>@Inject Faculty</code> will get their own instance of <code>Faculty</code>. If the desire
	is to share the same instance of <code>Faculty</code>, see the concept of <code>scopes</code> — this is
	exactly what scopes are for.</p>
	</div>
	</div>
	</div>
	<div class="sect1">
	<h2 id="_example">Example</h2>
	<div class="sectionbody">
	<div class="paragraph">
	<p>In this example, we have an <code>@Stateless</code> bean <code>Course</code> with an <code>@Inject</code> reference to an
	object of type <code>Faculty</code>. When <code>Course</code> is created, the container will also create an
	instance of <code>Faculty</code>. The <code>@PostConstruct</code> will be called on the <code>Faculty</code>,
	then the <code>Faculty</code> instance will be injected into the <code>Course</code> bean. Finally, the
	<code>@PostConstruct</code> will be invoked on <code>Course</code> and then we’re done. All instances will
	have been created.</p>
	</div>
	<div class="paragraph">
	<p>The <code>CourseTest</code> test case drives this creation process by having <code>Course</code> injected
	in its <code>@Setup</code> method. By the time our <code>@Test</code> method is invoked,
	all the real work should be done and we should be ready to go. In the test case we do
	some basic asserts to ensure everything was constructed, all <code>@PostConstruct</code> methods
	called and everything injected.</p>
	</div>
	<div class="sect2">
	<h3 id="_faculty_a_basic_injectable_pojo">Faculty <small>a basic injectable pojo</small></h3>
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java">public class Faculty {

	private List<String> facultyMembers;

	private String facultyName;

	@PostConstruct
	public void initialize() {
	this.facultyMembers = new ArrayList<String>();
	facultyMembers.add("Ian Schultz");
	facultyMembers.add("Diane Reyes");
	facultyName = "Computer Science";
	}

	public List<String> getFacultyMembers() {
	return facultyMembers;
	}

	public String getFacultyName() {
	return facultyName;
	}

	}</code></pre>
	</div>
	</div>
	</div>
	<div class="sect2">
	<h3 id="_course_a_simple_session_bean">Course <small>a simple session bean</small></h3>
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java">@Stateless
	public class Course {

	@Inject
	private Faculty faculty;

	private String courseName;

	private int capacity;

	@PostConstruct
	private void init() {
	assert faculty != null;

	// These strings can be externalized
	// We'll see how to do that later
	this.courseName = "CDI 101 - Introduction to CDI";
	this.capacity = 100;
	}

	public String getCourseName() {
	return courseName;
	}

	public int getCapacity() {
	return capacity;
	}

	public Faculty getFaculty() {
	return faculty;
	}
	}</code></pre>
	</div>
	</div>
	</div>
	</div>
	</div>
	<div class="sect1">
	<h2 id="_test_case">Test Case</h2>
	<div class="sectionbody">
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-java" data-lang="java">public class CourseTest extends TestCase {

	@EJB
	private Course course;

	@Before
	public void setUp() throws Exception {
	EJBContainer.createEJBContainer().getContext().bind("inject", this);
	}

	@Test
	public void test() {

	// Was the EJB injected?
	assertTrue(course != null);

	// Was the Course @PostConstruct called?
	assertNotNull(course.getCourseName());
	assertTrue(course.getCapacity() > 0);

	// Was a Faculty instance injected into Course?
	final Faculty faculty = course.getFaculty();
	assertTrue(faculty != null);

	// Was the @PostConstruct called on Faculty?
	assertEquals(faculty.getFacultyName(), "Computer Science");
	assertEquals(faculty.getFacultyMembers().size(), 2);
	}
	}</code></pre>
	</div>
	</div>
	</div>
	</div>
	<div class="sect1">
	<h2 id="_running">Running</h2>
	<div class="sectionbody">
	<div class="listingblock">
	<div class="content">
	<pre class="highlight"><code class="language-console" data-lang="console">-------------------------------------------------------
	T E S T S
	-------------------------------------------------------
	Running org.superbiz.cdi.basic.CourseTest
	Apache OpenEJB 4.0.0-beta-1 build: 20111002-04:06
	http://tomee.apache.org/
	INFO - openejb.home = /Users/dblevins/examples/cdi-basic
	INFO - openejb.base = /Users/dblevins/examples/cdi-basic
	INFO - Using 'javax.ejb.embeddable.EJBContainer=true'
	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 - Found EjbModule in classpath: /Users/dblevins/examples/cdi-basic/target/classes
	INFO - Beginning load: /Users/dblevins/examples/cdi-basic/target/classes
	INFO - Configuring enterprise application: /Users/dblevins/examples/cdi-basic
	INFO - Configuring Service(id=Default Managed Container, type=Container, provider-id=Default Managed Container)
	INFO - Auto-creating a container for bean cdi-basic.Comp: Container(type=MANAGED, id=Default Managed Container)
	INFO - Configuring Service(id=Default Stateless Container, type=Container, provider-id=Default Stateless Container)
	INFO - Auto-creating a container for bean Course: Container(type=STATELESS, id=Default Stateless Container)
	INFO - Enterprise application "/Users/dblevins/examples/cdi-basic" loaded.
	INFO - Assembling app: /Users/dblevins/examples/cdi-basic
	INFO - Jndi(name="java:global/cdi-basic/cdi-basic.Comp!org.apache.openejb.BeanContext$Comp")
	INFO - Jndi(name="java:global/cdi-basic/cdi-basic.Comp")
	INFO - Jndi(name="java:global/cdi-basic/Course!org.superbiz.cdi.basic.Course")
	INFO - Jndi(name="java:global/cdi-basic/Course")
	INFO - Jndi(name="java:global/EjbModule1833350875/org.superbiz.cdi.basic.CourseTest!org.superbiz.cdi.basic.CourseTest")
	INFO - Jndi(name="java:global/EjbModule1833350875/org.superbiz.cdi.basic.CourseTest")
	INFO - Created Ejb(deployment-id=Course, ejb-name=Course, container=Default Stateless Container)
	INFO - Created Ejb(deployment-id=cdi-basic.Comp, ejb-name=cdi-basic.Comp, container=Default Managed Container)
	INFO - Created Ejb(deployment-id=org.superbiz.cdi.basic.CourseTest, ejb-name=org.superbiz.cdi.basic.CourseTest, container=Default Managed Container)
	INFO - Started Ejb(deployment-id=Course, ejb-name=Course, container=Default Stateless Container)
	INFO - Started Ejb(deployment-id=cdi-basic.Comp, ejb-name=cdi-basic.Comp, container=Default Managed Container)
	INFO - Started Ejb(deployment-id=org.superbiz.cdi.basic.CourseTest, ejb-name=org.superbiz.cdi.basic.CourseTest, container=Default Managed Container)
	INFO - Deployed Application(path=/Users/dblevins/examples/cdi-basic)
	Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.126 sec

	Results :

	Tests run: 1, Failures: 0, Errors: 0, Skipped: 0</code></pre>
	</div>
	</div>
	</div>
	</div>
	<div class="sect1">
	<h2 id="_apis_used">APIs Used</h2>
	<div class="sectionbody">
	<div class="ulist">
	<ul>
	<li>
	<p><a href="../../jakartaee-8.0/javadoc/javax/annotation/PostConstruct.html">javax.annotation.PostConstruct</a></p>
	</li>
	<li>
	<p><a href="../../jakartaee-8.0/javadoc/javax/ejb/EJB.html">javax.ejb.EJB</a></p>
	</li>
	<li>
	<p><a href="../../jakartaee-8.0/javadoc/javax/ejb/Stateless.html">javax.ejb.Stateless</a></p>
	</li>
	<li>
	<p><a href="../../jakartaee-8.0/javadoc/javax/ejb/embeddable/EJBContainer.html">javax.ejb.embeddable.EJBContainer</a></p>
	</li>
	</ul>
	</div>
	</div>
	</div>
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