The below is the hibernate.cfg.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">org.hibernate.dialect.DerbyDialect</property>
<property name="hibernate.connection.driver_class">org.apache.derby.jdbc.ClientDriver</property>
<property name="hibernate.connection.url">jdbc:derby://localhost:1527/XE</property>
<property name="hibernate.connection.username">username</property>
<property name="hibernate.connection.password">password</property>
</session-factory>
</hibernate-configuration>
I wonder if it's always necessary to use hibernate.cfg.xml in every Hibernate Application or there is any alternative way to configure Hibernate.
You can do this by setting the properties using java
public class TestHibernate {
public static void main(String arg[]) {
Properties prop= new Properties();
prop.setProperty("hibernate.connection.url", "jdbc:mysql://<your-host>:<your-port>/<your-dbname>");
//You can use any database you want, I had it configured for Postgres
prop.setProperty("dialect", "org.hibernate.dialect.PostgresSQL");
prop.setProperty("hibernate.connection.username", "<your-user>");
prop.setProperty("hibernate.connection.password", "<your-password>");
prop.setProperty("hibernate.connection.driver_class", "org.postgresql.Driver");
prop.setProperty("show_sql", true); //If you wish to see the generated sql query
SessionFactory sessionFactory = new Configuration().addProperties(prop).buildSessionFactory();
Session session = sessionFactory.openSession();
session.beginTransaction();
Customer user = new Customer(); //Note customer is a POJO maps to the customer table in the database.
user.setName("test");
user.setisActive(true);
session.save(user);
session.getTransaction().commit();
session.close();
}
}
#Entity
#Table(name = "customer", uniqueConstraints = {
#UniqueConstraint(columnNames = "customerid")})
public class Customer implements Serializable{
private String name;
private int customerid;
private boolean isActive;
public Customer() {
}
public Customer(String name, int customerId, boolean isActive) {
this.name = name;
this.customerid = customerId;
this.isActive = isActive;
}
/**
* GETTERS
*/
#Column(name = "name", unique = false, nullable = false, length = 100)
public String getname() {
return name;
}
#Id
#GeneratedValue(strategy = IDENTITY)
#Column(name = "customerid", unique = true, nullable = false)
public int getcustomerid() {
return customerid;
}
#Column(name = "isactive", unique = false, nullable = false)
public boolean getisactive() {
return isActive;
}
/**
* SETTERS
*/
public void setname(String name) {
this.name = name;
}
public void setisactive(boolean isActive) {
this.isActive = isActive;
}
}
It is not necessary, in the session factory bean configuration you can pass these values directly using
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.DerbyDialect</prop>
<prop key="hibernate.show_sql"></prop>
<prop key="hibernate.use_outer_join">true</prop>
</props>
</property>
ex
<bean id="mySessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.DerbyDialect</prop>
<prop key="hibernate.show_sql"></prop>
<prop key="hibernate.use_outer_join">true</prop>
<prop key="hibernate.jdbc.batch_size" >30</prop>
<prop key="hibernate.connection.SetBigStringTryClob">true</prop>
</props>
</property>
<property name="packagesToScan">
<list>
<value>mypackage</value>
</list>
</property>
</bean>
You can Specify the properties of hibernate.cfg.xml as property injection in spring bean.xml
for example
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
So in similar way you can specify all properties in spring as a dependency for sessionFacory
Related
i am trying to achieve second level caching while logging in user.
my scenario:-
whenever a user is validated it needs to pull more details from other tables. like in this case, i am pulling data from userdetails table using inner join.
each time a user is validated it pulls the same data. so i don't want to keep executing query every time a user tries to login. in this case maybe i can make a use of second level cache.
unfortunately i'm not able to achieve second level cache of hibernate here.
UserController
#Controller
public class UserController {
#Autowired
private UserDao userDao;
#RequestMapping("/getUserDetails")
public #ResponseBody List<UserDetailsMapping> userDetailsMappings(){
return userDao.getUserDetails();
}
}
UserDao
#Repository
public class UserDao {
#Autowired
private SessionFactory sessionFactory;
public List<UserDetailsMapping> getUserDetails(){
Session session = sessionFactory.openSession();
String sql ="select u.username,ud.address,ud.height,ud.weight from
User u inner join UserDetails ud \n" +
"on u.username=ud.username where u.username='sagar' and
u.password='sagar';";
Query query = session.createNativeQuery(sql,"userMapping")
.setCacheable(true);
List<UserDetailsMapping> list = query.getResultList();
return list;
}
}
User.class
#Entity
#Cacheable
#Cache(usage = CacheConcurrencyStrategy.READ_ONLY)
public class User {
#Id
private String username;
private String password;
**************constructors and getter setters**********
}
UserDetails.class
#Entity
#Cacheable
#Cache(usage = CacheConcurrencyStrategy.READ_ONLY)
#SqlResultSetMapping(name = "userMapping",
classes = {#ConstructorResult(targetClass = UserDetailsMapping.class,
columns = {
#ColumnResult(name = "username",type = String.class),
#ColumnResult(name = "address",type = String.class),
#ColumnResult(name = "height",type = Integer.class),
#ColumnResult(name = "weight",type = Integer.class)
})
})
public class UserDetails {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
private String username;
private String address;
private String gender;
private int height;
private int weight;
**************constructors and getter setters**********
}
applicationContext Configuration
<bean id="sessionFactory" class="org.springframework.orm.
hibernate5.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
<prop key="hibernate.cache.use_second_level_cache">true</prop>
<prop key="hibernate.cache.region.factory_class">
org.hibernate.cache.ehcache.EhCacheRegionFactory</prop>
</props>
</property>
<property name="packagesToScan">
<list>
<value>com.test</value>
</list>
</property>
</bean>
I have an embeddable entity in a java web app as follow:
#Embeddable
#Getter
#Setter
public class Address {
private String street;
private String alley;
private int postCode;
}
I use a embedded field in another entity as follow:
#Entity
#Getter
#Setter
public class User {
#Embedded
private Address home;
#Embedded
private Address work;
}
When I run application, Occur error :
org.hibernate.MappingException: Repeated column in mapping for entity:
my.package.User column: alley(should be mapped with insert="false"
update="false").
How can I fix it?
note:
I can't use #AttributeOverrides.
I'm using hibernate 5.2.10.
update:
I use configs in applicationContext.xml as follow:
<bean id="mainSessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan">
<list>
<value>my.package</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.spatial.dialect.postgis.PostgisDialect</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.connection.characterEncoding">UTF-8</prop>
<prop key="hibernate.connection.charSet">UTF-8</prop>
<prop key="hibernate.default_schema">public</prop>
<prop key="hibernate.implicit_naming_strategy">org.hibernate.boot.?model.naming.Impli?ci?tNamingStrategyComponentPathImpl</prop>
</props>
</property>
</bean>
<bean id="hibernateTransactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
<property name="sessionFactory" ref="mainSessionFactory"/>
</bean>
You can achieve using #AttributeOverrides
#Embeddable
#Getter
#Setter
public class Address {
private String street;
private String alley;
private int postCode;
}
#Entity
#Getter
#Setter
public class User {
#Embedded
#AttributeOverrides({
#AttributeOverride(name="street",column=#Column(name="home_street")),
#AttributeOverride(name="alley",column=#Column(name="home_alley")),
#AttributeOverride(name="postCode",column=#Column(name="home_postCode"))
})
private Address home;
#Embedded
#AttributeOverrides({
#AttributeOverride(name="street",column = #Column(name="work_street")),
#AttributeOverride(name="alley",column=#Column(name="work_alley")),
#AttributeOverride(name="postCode",column=#Column(name="work_postCode"))
})
private Address work;
}
UPDATE:
If you don't want to use #AttributeOverrides then try overring hibernate naming strategy using ImplicitNamingStrategyComponentPathImpl.INSTANCE
I solve my problem and I want to share the answer:
The key point is defining implicitNamingStrategy:
<bean id="mfNamingStrategy"
class="org.hibernate.boot.model.naming.ImplicitNamingStrategyComponentPathImpl" />
<bean id="mainSessionFactory"
class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
<property name="implicitNamingStrategy" ref="mfNamingStrategy" />
<property name="hibernateProperties">
<props>
...
<!-- <prop key="hibernate.implicit_naming_strategy">org.hibernate.boot.?model.naming.Impli?ci?tNamingStrategyComponentPathImpl</prop> -->
</props>
</property>
</bean>
I know there are few threads about this, but I cannot understand why it is not working with my code. I have the entire database with capital letters, columns, table names, sequences.But when I try to make a query, via sql or criteria, It transforms all values in lowercase. I found a workaround but I don't want to write queries like:
select a."COLUMN_1", a."COLUMN_2" from schema."A" a
And mappings like:
#Entity(name = "`A`")
public class A implements Serializable {
#Column(name = "`COLUMN_1`")
private Integer column1;
#Column(name = "`COLUMN_2`")
private Integer column2;
}
I tried to follow some threads in stackoverflow implementing my own naming strategy, but it neither didn't work .
public class ModifiedImprovedNamingStrategy extends PhysicalNamingStrategyStandardImpl{
#Override
public final Identifier toPhysicalColumnName(final Identifier name, final JdbcEnvironment context) {
return new Identifier(addUnderscores(name.getText()), name.isQuoted());
}
/**
* Adds the underscores.
*
* #param name
* the name
* #return the string
*/
protected static String addUnderscores(final String name) {
final StringBuilder buf = new StringBuilder(name.replace('.', '_'));
for (int i = 1; i < (buf.length() - 1); i++) {
if (Character.isLowerCase(buf.charAt(i - 1))
&& Character.isUpperCase(buf.charAt(i))
&& Character.isLowerCase(buf.charAt(i + 1))) {
buf.insert(i++, '_');
}
}
return "`" + buf.toString().toUpperCase(Locale.ROOT) + "`";
}
}
And then calling it in my applicationContext like that:
<bean id="sessionFactory"
class="org.springframework.orm.hibernate5.LocalSessionFactoryBean"
p:dataSource-ref="dataSource">
<property name="packagesToScan" value="com.services.vo"/>
<property name="mappingLocations">
<list>
<value>classpath*:hibernate/queries/**.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.transaction.coordinator_class">org.hibernate.transaction.JDBCTransactionFactory</prop>
<prop key="hibernate.physical_naming_strategy">com.services.util.hibernate.ModifiedImprovedNamingStrategy</prop>
<prop key="hibernate.format_sql">true</prop>
</props>
</property>
</bean>
My intention is to avoid writing those everywhere. I tried to set a breakpoint inside the overrided ModifiedImprovedNamingStrategy methods. When I try a unit test, but it is not stopping there.Is there any way to do what I want? or will I be forced to keep those ?
Thanks in advance
I believe you have to add annotation #Table(name = "A") in your case to mapping your Entity A into database table A , Here's my how i use it, hope it helps:
#Entity
#Table(name = "house")
#Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
#Document(indexName = "house")
public class House implements Serializable {
#NotNull
#Column(name = "location", nullable = false)
private String location;
#Size(max = 200)
#Column(name = "description", length = 200)
private String description;
}
Can anybody help me out of this situation?
Users.java
#Entity
#Table(name="users")
public class Users {
#Id
#Column(name="id")
private int id;
#Column(name="name")
private String name;
#Column(name="city")
private String city;
#Column(name="salary")
private Long salary;
#Column(name="email")
private String email;
//getters and setters
}
applicationContext.xml
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
// Dont Understand whether internaly its reading the class or not!
<property name="packagesToScan" value="com.project.entities"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop> </props>
</property>
</bean>
Method from persistence Layer
public List<Users> getAllUsers(){
String queryString = "from Users users";
List<Users> list = htemp.find(queryString);
return list;
}
Just started learning hibernate, and to understand hibernate 2nd level cache. I created a comment Entity and try to work on it. Here are my codes!
#Entity
#Table(name = "comment")
#FilterDefs(value={#FilterDef(name="projectFilter",parameters=#ParamDef(name="projectID", type="java.lang.Long" )), #FilterDef(name="issueFilter", parameters=#ParamDef( name="issueID", type="java.lang.Long" ) )})
#Filters(value={#Filter(name = "projectFilter", condition = "project_id = :projectID"),
#Filter(name = "issueFilter", condition = "issue_id = :issueID")})
#Cache(usage=CacheConcurrencyStrategy.READ_WRITE, region="comment")
public class Comment {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
#Column(name = "id", unique = true, nullable = false, precision = 5, scale = 0 )
private long id;
#Column(name = "project_id", nullable = false)
private long projectId;
#Column(name = "issue_id", nullable = false)
private long issueId;
#Column(name = "author_id", nullable = false)
private long auhorId;
#Column(name = "author_name", nullable = false)
private String authorName;
#Column(name = "comment")
private String comment;
#Column(name = "created_date")
private Date createdDate;
I want to fetch user comment based on project or project and issue. In DAO,I have written the following function for comments based on projectid.
#Autowired
private SessionFactory sessionFactory;
...
#Override
public List<Comment> getAllProjectComments(long projectId) {
Session session = getCurrentSession();
Filter filter = session.enableFilter("projectFilter");
filter.setParameter("projectID", projectId);
return session.createQuery("from Comment").setCacheable(true).list();
}
and ehcahe.xml is below
<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../config/ehcache.xsd" updateCheck="false">
<diskStore path="java.io.tmpdir/hibernate-cache"/>
<defaultCache maxElementsInMemory="500"
eternal="false"
timeToIdleSeconds="1200"
timeToLiveSeconds="2400"
overflowToDisk="false"
maxElementsOnDisk="1000"
diskPersistent="false"
diskExpiryThreadIntervalSeconds="1200"
memoryStoreEvictionPolicy="LRU"/>
<cache name="org.trackMyProject.entity.Comment"
maxElementsInMemory="50"
maxElementsOnDisk="500"
eternal="false"
timeToIdleSeconds="30"
timeToLiveSeconds="120"
overflowToDisk="true"
/>
I have added 500 comments in table for 2 projectids.
when the controller call DAO method for getting the comments based on the project id and subsequent call for that project id seems to work perfectly with 2nd level cache and DB is not getting hit. But if I switch between 2 projectIDs constantly, then each time DB gets hit, that I don't want.
Can anybody tell me what kind of mistake I have made or need to do more configuration.
Thanks in advance!!
EDIT!
classpath:hibernate.cfg.xml
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${jdbc.dialect}</prop>
<prop key="hibernate.show_sql">true</prop>
<!-- <prop key="hibernate.cache.use_query_cache">true</prop> -->
<prop key="hibernate.connection.release_mode">after_transaction</prop>
<prop key="hibernate.bytecode.use_reflection_optimizer">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.cache.provider_configuration_file_resource_path">ehcache.xml</prop>
<prop key="hibernate.cache.use_second_level_cache">true</prop>
<prop key="hibernate.cache.use_query_cache">true</prop>
<prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</prop>
<prop key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</prop>
</props>
</property>
</bean>
You are using createQuery which would mean you need query level caching, try adding this :
<property name='hibernate.cache.use_query_cache'>true</property>