THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
...
And, as usual there is an empty constructor for the Entity Bean
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package org.apache.geronimo.samples.myphonebookpak;
import java.io.Serializable;
import javax.persistence.Id;
import javax.persistence.Entity;
import javax.persistence.Table;
@Entity
@Table(name = "phonebook")
public class PhoneBook implements Serializable {
private String number;
private String name;
public PhoneBook() {
}
public PhoneBook(String name, String number) {
this.name = name;
this.number = number;
}
@Id
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getNumber() {
return number;
}
public void setNumber(String number) {
this.number = number;
}
}
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MyPhonebookLocal.java is the business interface that drives the above mentioned Entity Bean.
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package org.apache.geronimo.samples.myphonebookpak;
import org.apache.geronimo.samples.myphonebookpak.PhoneBook;
public interface MyPhonebookLocal {
public PhoneBook findByPrimaryKey(String name);
}
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- @Stateless - tells Geronimo that this is a stateless session bean
- @PersistenceUnit - tells Geronimo to retrieve a persistence unit defined in the persistence.xml and place it in the EntityManagerFactory
Note Note that PersistenceContext is used when you are directly obtaining a EntityManager. For an EntityManagerFactory use PersistenceUnit.
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package org.apache.geronimo.samples.myphonebookpak;
import javax.ejb.Stateless;
import javax.persistence.PersistenceUnit;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import org.apache.geronimo.samples.myphonebookpak.PhoneBook;
@Stateless
public class MyPhonebookBean implements MyPhonebookLocal {
@PersistenceUnit(unitName="PhonePU")
protected EntityManagerFactory emf;
public MyPhonebookBean() {
}
public PhoneBook findByPrimaryKey(String name) {
EntityManager em = emf.createEntityManager();
PhoneBook phonebook = (PhoneBook)em.find(PhoneBook.class, name);
em.close();
return phonebook;
}
}
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index.jsp is the JSP page that uses the EJB to access the database.
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<%@ page contentType="text/html" import="javax.naming.Context, javax.naming.InitialContext " %>
<%@ page import="org.apache.geronimo.samples.myphonebookpak.MyPhonebookLocal" %>
<%@ page import="org.apache.geronimo.samples.myphonebookpak.PhoneBook" %>
<%
String searchName = "";
if (request.getParameter("searchname") != null) {
searchName = request.getParameter("searchname");
}
%>
<html>
<head><title>Phonebook</title></head>
<body>
<form action="index.jsp">
<b>Search number</b>:<br>
Enter name: <input type="text" name="searchname" value="<%=searchName%>">
<input type="submit" value="Search">
(Test with <a href="index.jsp?searchname=Joe">Joe</a>)
</form>
<%
if (!searchName.equals("")) {
String number = "";
try {
Context context = new InitialContext();
MyPhonebookLocal myPhonebookLocal = (MyPhonebookLocal) context.lookup("java:comp/env/ejb/MyPhonebookBean");
PhoneBook phonebook = myPhonebookLocal.findByPrimaryKey(searchName);
if (phonebook != null) {
number = phonebook.getNumber();
}
}
catch (Exception e) {
number = e.toString();
}
out.println("This is the number returned from the EJB when searching for '" + searchName + "' : " + number);
}
%>
</body>
</html>
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...
persistence.xml will specify the name of the PersistenceUnit. This name is used when referencing for the EntityManagerFactory. I have denoted it as PhonePU. I added an extra property called SynchronizeMappings so that the data in the database will not be overwritten.
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<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.0"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="PhonePU">
<description>Phone Book</description>
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
<jta-data-source>SampleTxDatasource</jta-data-source>
<non-jta-data-source>SampleNoTxDatasource</non-jta-data-source>
<class>org.apache.geronimo.samples.myphonebookpak.PhoneBook</class>
<properties>
<property name="openjpa.jdbc.SynchronizeMappings" value="false"/>
</properties>
</persistence-unit>
</persistence>
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...
plan.xml is generated by building the sample and can be found under ./myphonebook-jetty/target/resources/META-INF/plan.xml to deploy on jetty or ./myphonebook-tomcat/target/resources/META-INF/plan.xml to deploy on tomcat following a successful build of the sample. Shown below is the deployment plan for tomcat.
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<?xml version="1.0" encoding="UTF-8"?>
<!--Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.-->
<!--$Rev: 497879 $ $Date: 2007-01-19 12:11:01 -0500 (Fri, 19 Jan 2007) $-->
<application xmlns="http://geronimo.apache.org/xml/ns/j2ee/application-1.2">
<dep:environment xmlns:dep="http://geronimo.apache.org/xml/ns/deployment-1.2">
<dep:moduleId>
<dep:groupId>org.apache.geronimo.samples</dep:groupId>
<dep:artifactId>myphonebook-tomcat</dep:artifactId>
<dep:version>2.1-SNAPSHOT</dep:version>
<dep:type>car</dep:type>
</dep:moduleId>
<dep:dependencies>
<dep:dependency>
<dep:groupId>org.apache.geronimo.samples</dep:groupId>
<dep:artifactId>sample-datasource</dep:artifactId>
<dep:version>2.1-SNAPSHOT</dep:version>
<dep:type>car</dep:type>
</dep:dependency>
<dep:dependency>
<dep:groupId>org.apache.geronimo.configs</dep:groupId>
<dep:artifactId>jasper</dep:artifactId>
<dep:version>2.1</dep:version>
<dep:type>car</dep:type>
</dep:dependency>
<dep:dependency>
<dep:groupId>org.apache.geronimo.configs</dep:groupId>
<dep:artifactId>tomcat6</dep:artifactId>
<dep:version>2.1</dep:version>
<dep:type>car</dep:type>
</dep:dependency>
<dep:dependency>
<dep:groupId>org.apache.geronimo.configs</dep:groupId>
<dep:artifactId>openejb</dep:artifactId>
<dep:version>2.1</dep:version>
<dep:type>car</dep:type>
</dep:dependency>
</dep:dependencies>
<dep:hidden-classes/>
<dep:non-overridable-classes/>
</dep:environment>
<gbean name="DBInitialization" class="org.apache.geronimo.connector.DatabaseInitializationGBean">
<!--<attribute name="testSQL">select * from phonebook</attribute>-->
<attribute name="path">PhoneBook.sql</attribute>
<reference name="DataSource">
<name>SampleTxDatasource</name>
</reference>
</gbean>
</application>
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