Definately you can use C3P0, this is developed for enterprise solution. To Check advantages you can follow this answer.
Here is the example code of integration:
@Bean
public JpaTransactionManager transactionManager() {
JpaTransactionManager transactionManager =
new JpaTransactionManager();
transactionManager.setEntityManagerFactory(entityManagerFactory().getObject());
return transactionManager;
}
This Bean is for getting JpaTransactionManager.
@Primary
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
entityManagerFactoryBean.setDataSource(dataSource());
entityManagerFactoryBean.setPersistenceProviderClass(HibernatePersistenceProvider.class);
entityManagerFactoryBean.setPackagesToScan("YOUR.DATABSE.ENTITY.PACKAGE");
entityManagerFactoryBean.setJpaProperties(hibProperties());
return entityManagerFactoryBean;
}
This Bean is for getting LocalContainerEntityManagerFactoryBean. It Takes DataSource ,PersistenceProviderClass , Entity Package Name PackagesToScan and JpaProperties from hibProperties().
@Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
return new PersistenceExceptionTranslationPostProcessor();
}
private Properties hibProperties() {
Properties properties = new Properties();
properties.put("hibernate.dialect", env.getProperty("hibernate.dialect"));
properties.put("hibernate.show_sql", env.getProperty("hibernate.show_sql"));
properties.put("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));
return properties;
}
Here, env value are comming from application.properties.
Check bellow properties:
hibernate.dialect: org.hibernate.dialect.Oracle12cDialect
hibernate.show_sql: false
hibernate.hbm2ddl.auto: none
The main part is DataSource Setup. That is given bellow:
@Bean
public ComboPooledDataSource dataSource(){
ComboPooledDataSource dataSource = new ComboPooledDataSource();
try {
dataSource.setDriverClass(env.getProperty("db.driver"));
dataSource.setJdbcUrl(env.getProperty("db.url"));
dataSource.setUser(env.getProperty("db.username"));
dataSource.setPassword(env.getProperty("db.password"));
dataSource.setMinPoolSize(Integer.parseInt(env.getProperty("minPoolSize")));
dataSource.setMaxPoolSize(Integer.parseInt(env.getProperty("maxPoolSize")));
dataSource.setMaxIdleTime(Integer.parseInt(env.getProperty("maxIdleTime")));
dataSource.setMaxStatements(Integer.parseInt(env.getProperty("maxStatements")));
dataSource.setMaxStatementsPerConnection(Integer.parseInt(env.getProperty("maxStatementsPerConnection")));
dataSource.setMaxIdleTimeExcessConnections(10000);
} catch (PropertyVetoException e) {
e.printStackTrace();
}
return dataSource;
}
It is using ComboPooledDataSource that is taking many more important parameter's like maxPoolSize,MinPoolSize, MaxIdleSize etc.
It's environment parameter are given bellow:
db.driver: oracle.jdbc.driver.OracleDriver // for Oracle
db.username: YOUR_USER_NAME
db.password: YOUR_USER_PASSWORD
db.url: DATABASE_URL
minPoolSize:5 // number of minimum poolSize
maxPoolSize:100 // number of maximum poolSize
maxIdleTime:5 // In seconds. After that time it will realease the unused connection.
maxStatements:1000
maxStatementsPerConnection:100
maxIdleTimeExcessConnections:10000
Here is the full working sample code:
import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.hibernate.jpa.HibernatePersistenceProvider;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.*;
import org.springframework.core.env.Environment;
import org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import javax.sql.DataSource;
import java.beans.PropertyVetoException;
import java.util.Properties;
@Configuration
@EnableTransactionManagement
@EnableJpaRepositories
@PropertySource("classpath:application.properties")
@Scope("singleton")
public class TestDataSource {
@Autowired
private Environment env;
@Qualifier("dataSource")
@Autowired
private DataSource dataSource;
@Bean
public JpaTransactionManager transactionManager() {
JpaTransactionManager transactionManager =
new JpaTransactionManager();
transactionManager.setEntityManagerFactory(entityManagerFactory().getObject());
return transactionManager;
}
@Primary
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
entityManagerFactoryBean.setDataSource(dataSource());
entityManagerFactoryBean.setPersistenceProviderClass(HibernatePersistenceProvider.class);
entityManagerFactoryBean.setPackagesToScan("YOUR.PACKAGE.NAME");
entityManagerFactoryBean.setJpaProperties(hibProperties());
return entityManagerFactoryBean;
}
@Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
return new PersistenceExceptionTranslationPostProcessor();
}
@Bean
public ComboPooledDataSource dataSource(){
ComboPooledDataSource dataSource = new ComboPooledDataSource();
try {
dataSource.setDriverClass(env.getProperty("db.driver"));
dataSource.setJdbcUrl(env.getProperty("db.url"));
dataSource.setUser(env.getProperty("db.username"));
dataSource.setPassword(env.getProperty("db.password"));
dataSource.setMinPoolSize(Integer.parseInt(env.getProperty("minPoolSize")));
dataSource.setMaxPoolSize(Integer.parseInt(env.getProperty("maxPoolSize")));
dataSource.setMaxIdleTime(Integer.parseInt(env.getProperty("maxIdleTime")));
dataSource.setMaxStatements(Integer.parseInt(env.getProperty("maxStatements")));
dataSource.setMaxStatementsPerConnection(Integer.parseInt(env.getProperty("maxStatementsPerConnection")));
dataSource.setMaxIdleTimeExcessConnections(10000);
} catch (PropertyVetoException e) {
e.printStackTrace();
}
return dataSource;
}
private Properties hibProperties() {
Properties properties = new Properties();
properties.put("hibernate.dialect", env.getProperty("hibernate.dialect"));
properties.put("hibernate.show_sql", env.getProperty("hibernate.show_sql"));
properties.put("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));
return properties;
}
}
Another things. Here is the gradle link
compile group: 'org.hibernate', name: 'hibernate-c3p0', version: '5.2.10.Final'
Hope this will help you.
Thanks :)
