diff --git a/spring-all/src/main/java/org/baeldung/startup/EventListenerExampleBean.java b/spring-all/src/main/java/org/baeldung/startup/EventListenerExampleBean.java new file mode 100644 index 0000000000..e9cd1a159d --- /dev/null +++ b/spring-all/src/main/java/org/baeldung/startup/EventListenerExampleBean.java @@ -0,0 +1,19 @@ +package org.baeldung.startup; + +import org.apache.log4j.Logger; +import org.springframework.context.event.ContextRefreshedEvent; +import org.springframework.context.event.EventListener; +import org.springframework.stereotype.Component; + +@Component +public class EventListenerExampleBean { + private static final Logger LOG = Logger.getLogger(EventListenerExampleBean.class); + + public static int counter; + + @EventListener + public void onApplicationEvent(ContextRefreshedEvent event) { + LOG.info("Increment counter"); + counter++; + } +} diff --git a/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/model/OrderDetail.java b/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/model/OrderDetail.java index 80cb915e52..ec8dc32200 100644 --- a/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/model/OrderDetail.java +++ b/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/model/OrderDetail.java @@ -1,43 +1,27 @@ package com.baeldung.hibernate.fetching.model; +import javax.persistence.*; import java.io.Serializable; import java.sql.Date; +@Entity +@Table (name = "USER_ORDER") public class OrderDetail implements Serializable{ private static final long serialVersionUID = 1L; - private Long orderId; - private Date orderDate; - private String orderDesc; - private User user; - public OrderDetail(){ + @Id + @GeneratedValue + @Column(name="ORDER_ID") + private Long orderId; + + public OrderDetail(){ } public OrderDetail(Date orderDate, String orderDesc) { - super(); - this.orderDate = orderDate; - this.orderDesc = orderDesc; + super(); } - public Date getOrderDate() { - return orderDate; - } - public void setOrderDate(Date orderDate) { - this.orderDate = orderDate; - } - public String getOrderDesc() { - return orderDesc; - } - public void setOrderDesc(String orderDesc) { - this.orderDesc = orderDesc; - } - public User getUser() { - return user; - } - public void setUser(User user) { - this.user = user; - } @Override public int hashCode() { final int prime = 31; @@ -62,6 +46,7 @@ public class OrderDetail implements Serializable{ return true; } + public Long getOrderId() { return orderId; } diff --git a/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/model/User.java b/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/model/User.java deleted file mode 100644 index fa995319fd..0000000000 --- a/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/model/User.java +++ /dev/null @@ -1,93 +0,0 @@ -package com.baeldung.hibernate.fetching.model; - -import java.io.Serializable; -import java.util.HashSet; -import java.util.Set; - -public class User implements Serializable { - - private static final long serialVersionUID = 1L; - private Long userId; - private String userName; - private String firstName; - private String lastName; - private Set orderDetail = new HashSet(); - - public User() { - } - - public User(final Long userId, final String userName, final String firstName, final String lastName) { - super(); - this.userId = userId; - this.userName = userName; - this.firstName = firstName; - this.lastName = lastName; - } - - @Override - public int hashCode() { - final int prime = 31; - int result = 1; - result = prime * result + ((userId == null) ? 0 : userId.hashCode()); - return result; - } - - @Override - public boolean equals(final Object obj) { - if (this == obj) - return true; - if (obj == null) - return false; - if (getClass() != obj.getClass()) - return false; - final User other = (User) obj; - if (userId == null) { - if (other.userId != null) - return false; - } else if (!userId.equals(other.userId)) - return false; - return true; - } - - public Long getUserId() { - return userId; - } - - public void setUserId(final Long userId) { - this.userId = userId; - } - - public String getUserName() { - return userName; - } - - public void setUserName(final String userName) { - this.userName = userName; - } - - public String getFirstName() { - return firstName; - } - - public void setFirstName(final String firstName) { - this.firstName = firstName; - } - - public String getLastName() { - return lastName; - } - - public void setLastName(final String lastName) { - this.lastName = lastName; - } - - public Set getOrderDetail() { - return orderDetail; - } - - public void setOrderDetail(Set orderDetail) { - this.orderDetail = orderDetail; - } - - -} diff --git a/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/model/UserEager.java b/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/model/UserEager.java new file mode 100644 index 0000000000..22b4fdc76c --- /dev/null +++ b/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/model/UserEager.java @@ -0,0 +1,71 @@ +package com.baeldung.hibernate.fetching.model; + +import javax.persistence.*; +import java.io.Serializable; +import java.util.HashSet; +import java.util.Set; + +@Entity +@Table (name = "USER") +public class UserEager implements Serializable { + + private static final long serialVersionUID = 1L; + + @Id + @GeneratedValue + @Column(name="USER_ID") + private Long userId; + + @OneToMany(fetch = FetchType.EAGER, mappedBy = "user") + private Set orderDetail = new HashSet(); + + public UserEager() { + } + + public UserEager(final Long userId) { + super(); + this.userId = userId; + } + + @Override + public int hashCode() { + final int prime = 31; + int result = 1; + result = prime * result + ((userId == null) ? 0 : userId.hashCode()); + return result; + } + + @Override + public boolean equals(final Object obj) { + if (this == obj) + return true; + if (obj == null) + return false; + if (getClass() != obj.getClass()) + return false; + final UserEager other = (UserEager) obj; + if (userId == null) { + if (other.userId != null) + return false; + } else if (!userId.equals(other.userId)) + return false; + return true; + } + + public Long getUserId() { + return userId; + } + + public void setUserId(final Long userId) { + this.userId = userId; + } + + public Set getOrderDetail() { + return orderDetail; + } + + public void setOrderDetail(Set orderDetail) { + this.orderDetail = orderDetail; + } + +} diff --git a/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/model/UserLazy.java b/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/model/UserLazy.java new file mode 100644 index 0000000000..5038fb90ef --- /dev/null +++ b/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/model/UserLazy.java @@ -0,0 +1,72 @@ +package com.baeldung.hibernate.fetching.model; + +import javax.persistence.*; +import java.io.Serializable; +import java.util.HashSet; +import java.util.Set; + +@Entity +@Table (name = "USER") +public class UserLazy implements Serializable { + + private static final long serialVersionUID = 1L; + + @Id + @GeneratedValue + @Column(name="USER_ID") + private Long userId; + + @OneToMany(fetch = FetchType.LAZY, mappedBy = "user") + private Set orderDetail = new HashSet(); + + public UserLazy() { + } + + public UserLazy(final Long userId) { + super(); + this.userId = userId; + } + + @Override + public int hashCode() { + final int prime = 31; + int result = 1; + result = prime * result + ((userId == null) ? 0 : userId.hashCode()); + return result; + } + + @Override + public boolean equals(final Object obj) { + if (this == obj) + return true; + if (obj == null) + return false; + if (getClass() != obj.getClass()) + return false; + final UserLazy other = (UserLazy) obj; + if (userId == null) { + if (other.userId != null) + return false; + } else if (!userId.equals(other.userId)) + return false; + return true; + } + + public Long getUserId() { + return userId; + } + + public void setUserId(final Long userId) { + this.userId = userId; + } + + + public Set getOrderDetail() { + return orderDetail; + } + + public void setOrderDetail(Set orderDetail) { + this.orderDetail = orderDetail; + } + +} diff --git a/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/util/HibernateUtil.java b/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/util/HibernateUtil.java index 27af8c9b8b..bbd7729232 100644 --- a/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/util/HibernateUtil.java +++ b/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/util/HibernateUtil.java @@ -11,7 +11,7 @@ public class HibernateUtil { //two config files are there //one with lazy loading enabled //another lazy = false - SessionFactory sf = null; + SessionFactory sf; if ("lazy".equals(fetchMethod)) { sf = new Configuration().configure("fetchingLazy.cfg.xml").buildSessionFactory(); } else { @@ -19,8 +19,7 @@ public class HibernateUtil { } // fetching.cfg.xml is used for this example - final Session session = sf.openSession(); - return session; + return sf.openSession(); } public static Session getHibernateSession() { diff --git a/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/view/FetchingAppView.java b/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/view/FetchingAppView.java index c55f65cdbf..1a5142c5c2 100644 --- a/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/view/FetchingAppView.java +++ b/spring-hibernate4/src/main/java/com/baeldung/hibernate/fetching/view/FetchingAppView.java @@ -1,111 +1,68 @@ package com.baeldung.hibernate.fetching.view; -import java.sql.Date; -import java.util.List; -import java.util.Set; - -import org.hibernate.Hibernate; +import com.baeldung.hibernate.fetching.model.OrderDetail; +import com.baeldung.hibernate.fetching.model.UserEager; +import com.baeldung.hibernate.fetching.model.UserLazy; +import com.baeldung.hibernate.fetching.util.HibernateUtil; import org.hibernate.Session; import org.hibernate.Transaction; - -import com.baeldung.hibernate.fetching.util.HibernateUtil; - -import com.baeldung.hibernate.fetching.model.OrderDetail; - -import com.baeldung.hibernate.fetching.model.User; - +import java.util.List; +import java.util.Set; public class FetchingAppView { - public FetchingAppView(){ - - } - - //lazily loaded - public Set lazyLoaded(){ - final Session sessionLazy = HibernateUtil.getHibernateSession("lazy"); - List users = sessionLazy.createQuery("From User").list(); - User userLazyLoaded = new User(); - userLazyLoaded = users.get(3); - //since data is lazyloaded so data won't be initialized - Set orderDetailSet = userLazyLoaded.getOrderDetail(); - return (orderDetailSet); - } - - //eagerly loaded - public Set eagerLoaded(){ - final Session sessionEager = HibernateUtil.getHibernateSession(); - //data should be loaded in the following line - //also note the queries generated - List users =sessionEager.createQuery("From User").list(); - User userEagerLoaded = new User(); - userEagerLoaded = users.get(3); - Set orderDetailSet = userEagerLoaded.getOrderDetail(); - return orderDetailSet; - } - - - //creates test data - //call this method to create the data in the database - public void createTestData() { + public FetchingAppView() { - final Session session = HibernateUtil.getHibernateSession(); - Transaction tx = null; - tx = session.beginTransaction(); - final User user1 = new User(); - final User user2 = new User(); - final User user3 = new User(); - - user1.setFirstName("Priyam"); - user1.setLastName("Banerjee"); - user1.setUserName("priyambanerjee"); - session.save(user1); - - user2.setFirstName("Navneeta"); - user2.setLastName("Mukherjee"); - user2.setUserName("nmukh"); - session.save(user2); - - user3.setFirstName("Molly"); - user3.setLastName("Banerjee"); - user3.setUserName("mollyb"); - session.save(user3); + } - final OrderDetail order1 = new OrderDetail(); - final OrderDetail order2 = new OrderDetail(); - final OrderDetail order3 = new OrderDetail(); - final OrderDetail order4 = new OrderDetail(); - final OrderDetail order5 = new OrderDetail(); + // lazily loaded + public Set lazyLoaded() { + final Session sessionLazy = HibernateUtil.getHibernateSession("lazy"); + List users = sessionLazy.createQuery("From UserLazy").list(); + UserLazy userLazyLoaded = users.get(3); + // since data is lazyloaded so data won't be initialized + return (userLazyLoaded.getOrderDetail()); + } - order1.setOrderDesc("First Order"); - order1.setOrderDate(new Date(2014, 10, 12)); - order1.setUser(user1); - - order2.setOrderDesc("Second Order"); - order2.setOrderDate(new Date(2016, 10, 25)); - order2.setUser(user1); - - order3.setOrderDesc("Third Order"); - order3.setOrderDate(new Date(2015, 2, 17)); - order3.setUser(user2); - - order4.setOrderDesc("Fourth Order"); - order4.setOrderDate(new Date(2014, 10, 1)); - order4.setUser(user2); - - order5.setOrderDesc("Fifth Order"); - order5.setOrderDate(new Date(2014, 9, 11)); - order5.setUser(user3); - - session.saveOrUpdate(order1); - session.saveOrUpdate(order2); - session.saveOrUpdate(order3); - session.saveOrUpdate(order4); - session.saveOrUpdate(order5); + // eagerly loaded + public Set eagerLoaded() { + final Session sessionEager = HibernateUtil.getHibernateSession(); + // data should be loaded in the following line + // also note the queries generated + List user = sessionEager.createQuery("From UserEager").list(); + UserEager userEagerLoaded = user.get(3); + return userEagerLoaded.getOrderDetail(); + } - tx.commit(); - session.close(); + // creates test data + // call this method to create the data in the database + public void createTestData() { - } + final Session session = HibernateUtil.getHibernateSession("lazy"); + Transaction tx = session.beginTransaction(); + final UserLazy user1 = new UserLazy(); + final UserLazy user2 = new UserLazy(); + final UserLazy user3 = new UserLazy(); + + session.save(user1); + session.save(user2); + session.save(user3); + + final OrderDetail order1 = new OrderDetail(); + final OrderDetail order2 = new OrderDetail(); + final OrderDetail order3 = new OrderDetail(); + final OrderDetail order4 = new OrderDetail(); + final OrderDetail order5 = new OrderDetail(); + + session.saveOrUpdate(order1); + session.saveOrUpdate(order2); + session.saveOrUpdate(order3); + session.saveOrUpdate(order4); + session.saveOrUpdate(order5); + + tx.commit(); + session.close(); + + } } diff --git a/spring-hibernate4/src/main/resources/fetching.cfg.xml b/spring-hibernate4/src/main/resources/fetching.cfg.xml index 4a7e574dda..1b9a4a191c 100644 --- a/spring-hibernate4/src/main/resources/fetching.cfg.xml +++ b/spring-hibernate4/src/main/resources/fetching.cfg.xml @@ -11,7 +11,10 @@ iamtheking org.hibernate.dialect.MySQLDialect true - - + validate + + + + \ No newline at end of file diff --git a/spring-hibernate4/src/main/resources/fetchingLazy.cfg.xml b/spring-hibernate4/src/main/resources/fetchingLazy.cfg.xml index 1f9a7df94e..c5f608e1a7 100644 --- a/spring-hibernate4/src/main/resources/fetchingLazy.cfg.xml +++ b/spring-hibernate4/src/main/resources/fetchingLazy.cfg.xml @@ -11,7 +11,7 @@ iamtheking org.hibernate.dialect.MySQLDialect true - - + + \ No newline at end of file diff --git a/spring-hibernate4/src/main/resources/fetching_create_queries.sql b/spring-hibernate4/src/main/resources/fetching_create_queries.sql index 11a4239e0d..b36d9828f1 100644 --- a/spring-hibernate4/src/main/resources/fetching_create_queries.sql +++ b/spring-hibernate4/src/main/resources/fetching_create_queries.sql @@ -1,17 +1,12 @@ CREATE TABLE `user` ( `user_id` int(10) NOT NULL AUTO_INCREMENT, - `USERNAME` varchar(100) DEFAULT NULL, - `FIRST_NAME` varchar(255) NOT NULL, - `LAST_NAME` varchar(255) NOT NULL, PRIMARY KEY (`user_id`) ) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=latin1 ; CREATE TABLE `user_order` ( `ORDER_ID` int(10) NOT NULL AUTO_INCREMENT, - `ORDER_DATE` date DEFAULT NULL, `USER_ID` int(10) NOT NULL DEFAULT '0', - `ORDER_DESC` varchar(1024) DEFAULT NULL, PRIMARY KEY (`ORDER_ID`,`USER_ID`), KEY `USER_ID` (`USER_ID`), CONSTRAINT `user_order_ibfk_1` FOREIGN KEY (`USER_ID`) REFERENCES `USER` (`user_id`) diff --git a/spring-hibernate4/src/test/java/com/baeldung/hibernate/fetching/HibernateFetchingTest.java b/spring-hibernate4/src/test/java/com/baeldung/hibernate/fetching/HibernateFetchingTest.java index fb3d0f92fc..a650f8eb37 100644 --- a/spring-hibernate4/src/test/java/com/baeldung/hibernate/fetching/HibernateFetchingTest.java +++ b/spring-hibernate4/src/test/java/com/baeldung/hibernate/fetching/HibernateFetchingTest.java @@ -1,21 +1,21 @@ package com.baeldung.hibernate.fetching; -import static org.junit.Assert.*; -import java.util.Set; - +import com.baeldung.hibernate.fetching.model.OrderDetail; +import com.baeldung.hibernate.fetching.view.FetchingAppView; import org.hibernate.Hibernate; import org.junit.Before; import org.junit.Test; -import com.baeldung.hibernate.fetching.model.OrderDetail; +import java.util.Set; -import com.baeldung.hibernate.fetching.view.FetchingAppView; +import static org.junit.Assert.assertFalse; +import static org.junit.Assert.assertTrue; public class HibernateFetchingTest { //this loads sample data in the database - @Before + @Before public void addFecthingTestData(){ FetchingAppView fav = new FetchingAppView(); fav.createTestData(); diff --git a/spring-hibernate4/src/test/resources/com/baeldung/hibernate/fetching/model/OrderDetail.hbm.xml b/spring-hibernate4/src/test/resources/com/baeldung/hibernate/fetching/model/OrderDetail.hbm.xml deleted file mode 100644 index e0b6516b47..0000000000 --- a/spring-hibernate4/src/test/resources/com/baeldung/hibernate/fetching/model/OrderDetail.hbm.xml +++ /dev/null @@ -1,26 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - \ No newline at end of file diff --git a/spring-hibernate4/src/test/resources/com/baeldung/hibernate/fetching/model/User.hbm.xml b/spring-hibernate4/src/test/resources/com/baeldung/hibernate/fetching/model/User.hbm.xml deleted file mode 100644 index 88882b973e..0000000000 --- a/spring-hibernate4/src/test/resources/com/baeldung/hibernate/fetching/model/User.hbm.xml +++ /dev/null @@ -1,31 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - \ No newline at end of file diff --git a/spring-hibernate4/src/test/resources/com/baeldung/hibernate/fetching/model/UserLazy.hbm.xml b/spring-hibernate4/src/test/resources/com/baeldung/hibernate/fetching/model/UserLazy.hbm.xml deleted file mode 100644 index 2f941fe8b0..0000000000 --- a/spring-hibernate4/src/test/resources/com/baeldung/hibernate/fetching/model/UserLazy.hbm.xml +++ /dev/null @@ -1,31 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - \ No newline at end of file diff --git a/spring-hibernate4/src/test/resources/fetching.cfg.xml b/spring-hibernate4/src/test/resources/fetching.cfg.xml index 4a7e574dda..acee7008ba 100644 --- a/spring-hibernate4/src/test/resources/fetching.cfg.xml +++ b/spring-hibernate4/src/test/resources/fetching.cfg.xml @@ -11,7 +11,8 @@ iamtheking org.hibernate.dialect.MySQLDialect true - - + + + \ No newline at end of file diff --git a/spring-hibernate4/src/test/resources/fetchingLazy.cfg.xml b/spring-hibernate4/src/test/resources/fetchingLazy.cfg.xml index 1f9a7df94e..1dc37d0cf8 100644 --- a/spring-hibernate4/src/test/resources/fetchingLazy.cfg.xml +++ b/spring-hibernate4/src/test/resources/fetchingLazy.cfg.xml @@ -11,7 +11,8 @@ iamtheking org.hibernate.dialect.MySQLDialect true - - + + + \ No newline at end of file