Module refactoring.

Author: sivaprasadreddy

chapter01/pom.xml

@@ -21,7 +21,7 @@
 		<logback.version>1.0.1</logback.version>
 		<log4j.version>1.2.16</log4j.version>
 		<mybatis.version>3.1.1</mybatis.version>
-		<mysql.version>5.1.18</mysql.version>
+		<mysql.version>5.1.22</mysql.version>
 		<maven.compiler.plugin>2.3.2</maven.compiler.plugin>
 	</properties>
 

chapter01/src/main/java/com/mybatis3/mappers/StudentMapper.java

@@ -16,6 +16,8 @@ public interface StudentMapper
 
 	Student findStudentById(Integer id);
 
+	Student findStudentByEmail(String email);
+
 	void insertStudent(Student student);
 
 	void updateStudent(Student student);

chapter01/src/main/java/com/mybatis3/services/JdbcStudentService.java

@@ -19,7 +19,7 @@ public class JdbcStudentService
 {
 
 	private static final String DRIVER = "com.mysql.jdbc.Driver";
-	private static final String URL = "jdbc:mysql://localhost:3306/elearning";
+	private static final String URL = "jdbc:mysql://localhost:3306";
 	private static final String USERNAME = "root";
 	private static final String PASSWORD = "admin";
 
@@ -32,7 +32,7 @@ public static void main(String[] args)
 		System.out.println(existingStudent);
 
 
-		long ts = System.currentTimeMillis();//For creating unique student names
+		/*long ts = System.currentTimeMillis();//For creating unique student names
 		Student newStudent = new Student(0,"student_"+ts,"student_"+ts+"@gmail.com",new Date());
 		service.createStudent(newStudent);
 		System.out.println(newStudent);
@@ -42,7 +42,7 @@ public static void main(String[] args)
 		ts = System.currentTimeMillis();//For creating unique student email
 		updateStudent.setEmail("student_"+ts+"@gmail.com");
 		service.updateStudent(updateStudent);
-		
+		*/
 	}
 
 	public Student findStudentById(int studId)
@@ -52,7 +52,7 @@ public Student findStudentById(int studId)
 		try
 		{
 			conn = getDatabaseConnection();
-			String sql = "select * from students where stud_id=?";
+			String sql = "select * from elearning.students where stud_id=?";
 			PreparedStatement pstmt = conn.prepareStatement(sql);
 			pstmt.setInt(1, studId);
 			ResultSet rs = pstmt.executeQuery();

chapter01/src/main/java/com/mybatis3/services/StudentService.java

@@ -35,9 +35,20 @@ public Student findStudentById(Integer studId)
 		logger.debug("Select Student By ID :{}", studId);
 		SqlSession sqlSession = MyBatisSqlSessionFactory.getSqlSession();
 		try {
+			//Student student = sqlSession.selectOne("com.mybatis3.StudentMapper.findStudentById", studId);
 			StudentMapper studentMapper = sqlSession.getMapper(StudentMapper.class);
 			return studentMapper.findStudentById(studId);
-			//return sqlSession.selectOne("com.mybatis3.StudentMapper.findStudentById", studId);
+		} finally {
+			sqlSession.close();
+		}
+	}
+	
+	public Student findStudentByEmail(String email)
+	{
+		SqlSession sqlSession = MyBatisSqlSessionFactory.getSqlSession();
+		try {
+			StudentMapper studentMapper = sqlSession.getMapper(StudentMapper.class);
+			return studentMapper.findStudentByEmail(email);
 		} finally {
 			sqlSession.close();
 		}

chapter01/src/main/java/com/mybatis3/util/MyBatisSqlSessionFactory.java

@@ -14,13 +14,10 @@
  */
 public class MyBatisSqlSessionFactory
 {
-	private static SqlSessionFactory sqlSessionFactory;
+	private static SqlSessionFactory sqlSessionFactory = initSqlSessionFactory();
 
-	public static SqlSessionFactory getSqlSessionFactory()
-	{
-		if(sqlSessionFactory==null) 
-		{
-			InputStream inputStream;
+	private static SqlSessionFactory initSqlSessionFactory() {
+		InputStream inputStream;
 			try
 			{
 				inputStream = Resources.getResourceAsStream("mybatis-config.xml");
@@ -29,12 +26,14 @@ public static SqlSessionFactory getSqlSessionFactory()
 			{
 				throw new RuntimeException(e.getCause());
 			}
-		}
 		return sqlSessionFactory;
 	}
 
-	public static SqlSession getSqlSession() 
-	{
+	public static SqlSessionFactory getSqlSessionFactory() {
+		return sqlSessionFactory;
+	}
+	
+	public static SqlSession getSqlSession() {
 		return getSqlSessionFactory().openSession();
 	}
 }

chapter01/src/main/resources/application.properties

@@ -4,5 +4,8 @@
 
 jdbc.driverClassName=com.mysql.jdbc.Driver
 jdbc.url=jdbc:mysql://localhost:3306/elearning
+#jdbc.url=jdbc:mysql://localhost:3306
 jdbc.username=root
 jdbc.password=admin
+
+schemaname=elearning

chapter01/src/main/resources/com/mybatis3/mappers/StudentMapper.xml

@@ -17,7 +17,11 @@
   	</select>
 
   	<select id="findStudentById" parameterType="int" resultType="Student">
-    	select stud_id as studId, name, email, dob from Students where stud_id=#{studId}
+    	select stud_id as studId, name, email, dob from ${schemaname}.Students where stud_id=#{studId}
+  	</select>
+  	
+  	<select id="findStudentByEmail" parameterType="String" resultType="Student">
+    	select stud_id as studId, name, email, dob from Students where email=#{email}
   	</select>
 
   	<insert id="insertStudent" parameterType="Student">

chapter01/src/main/resources/sql/create_tables.sql

@@ -67,5 +67,13 @@ CREATE TABLE COURSE_ENROLLMENT
 
 
 
+CREATE TABLE USER_PICS 
+(
+  ID INT(11) NOT NULL AUTO_INCREMENT,
+  NAME VARCHAR(50) DEFAULT NULL,
+  PIC BLOB,
+  BIO LONGTEXT,
+  PRIMARY KEY (ID)
+) ENGINE=INNODB AUTO_INCREMENT=1 DEFAULT CHARSET=LATIN1;
 
 

chapter01/src/test/java/com/mybatis3/services/StudentServiceTest.java

@@ -32,7 +32,7 @@ public static void teardown()
 		studentService = null;
 	}
 
-	@Test
+	//@Test
     public void testFindAllStudents() 
 	{
 		List<Student> students = studentService.findAllStudents();
@@ -52,6 +52,14 @@ public void testFindStudentById()
 		System.out.println(student);
 	}
 
+	//@Test
+    public void testFindStudentByEmail() 
+	{
+		Student student = studentService.findStudentByEmail("student_1gmail.com");
+		Assert.assertNotNull(student);
+		System.out.println(student);
+	}
+	
 	@Test
 	@Ignore
 	public void testCreateUStudent() 
@@ -68,7 +76,7 @@ public void testCreateUStudent()
 	}
 
 	@Test
-	//@Ignore
+	@Ignore
 	public void testUpdateStudent() 
 	{
 		int id = 3;

chapter02/README.txt

@@ -1,6 +1,12 @@
 Chapter 2: Bootstrapping MyBatis
-================================
-This chapter describes the approaches to configure and bootstrap MyBatis.
-Topics covered:
+=======================================
+This module, chapter02, is a maven based java project to demonstrate the following approaches to configure and bootstrap MyBatis.
 	. Configuration using XML 
-	. Configuration using Java API.
+	. Configuration using Java API.
+
+Note: You can create MySQL Database tables using scripts in src/main/resources/sql folder of chapter01 module.	
+
+How to Run:
+	1. Configure Database Connection properties like hostname, username and password in src/main/resources/application.properties file.
+	2. Run StudentServiceTest JUnit Test class by using the appropriate configuration style in com.mybatis3.services.StudentServiceTest.setup() method.
+