Spring JDBC连接池的最佳实践-Java 学习之路

我有一个基本的Spring JDBC应用程序，它具有非常基本的配置：

<bean id="myDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
   <property name="driverClassName" value="oracle.jdbc.OracleDriver"/>
   <property name="url" value="jdbc:oracle:thin:@1.1.1.1:1521:XXX"/>
   <property name="username" value="username"/>
   <property name="password" value="password"/>
</bean>

<bean id="dbThing" class="com.DbThing">
   <property name="dataSource" ref="myDataSource"/>
</bean>

我想介绍一个连接池，并在阅读了几个线程后，我对使用哪个池库感到有点困惑 .

似乎在SO上有更多学分的图书馆是CP30和DBCP . 由于我使用的是Oracle，我也可以使用驱动程序提供的pooled data source . 我知道有更多的库可用 - 例如新的Apache Tomcat 7池库 .

有没有我应该避免的图书馆？

我应该在给定的库中使用任何推荐的配置吗？

你想分享的任何“战争故事”？

4 回答

17

C3PO和DBCP的发展已停滞不前，主要是因为它们已经成熟 . 我已经看到这两个驱动程序每秒能够支持数百个事务 .

Tomcat池是一个经过重新设计和更新的DBCP驱动程序 . MyBatis 3.0还包含它's own pooling implementation which, based on code inspection, seems solid. Finally, there' s BoneCP，声称具有最佳性能 . 我还没有在项目中使用过这些 .

可能最好的建议是选择其中任何一个进行测试 . Spring可以让以后轻松换出 .

回复于 2024-05-03T04:47:39+08:00
20
作为BoneCP的替代方案，您是否尝试过Oracle自己的数据库连接池？

我在过去的几个星期里有过很好的经历，所以值得一试 - 同样，我想Oracle会知道关于创建连接池的一两件事，特别是在与自己的数据库配对时 .
```
<bean id="dataSource" class="oracle.jdbc.pool.OracleConnectionPoolDataSource">
    <property name="URL" value="${jdbc.url}" />
    <property name="user" value="${jdbc.username}" />
    <property name="password" value="${jdbc.password}" />
</bean>
```
UPDATE ：此外，如果您正在使用（最新的）一个Oracle JDBC驱动程序（11.2.0.1），您可能需要尝试新的通用连接池 . OracleConnectionPoolDataSource 似乎已被正式弃用，以支持此池 . 但是，有些用户报告使用它时出错，所以可能为时尚早 . 我可以使用Oracle的最新JDBC驱动程序，所以我会尽快给它一个更新，并在此有任何信息 .

有关此SO线程的更多信息：Oracle UCP
回复于 2024-05-03T04:47:39+08:00

BoneCP 一直在声称，但随后引入了一个名为 HiKariCP 的新工具，它克服了传递工具中存在的许多缺点，您可以通过以下更改来配置它 application-context.xml

<bean id="hikariConfig" class="com.zaxxer.hikari.HikariConfig">
  <property name="maximumPoolSize" value="10" />
  <property name="minimumPoolSize" value="2" />
  <property name="dataSourceClassName" 
            value="oracle.jdbc.pool.OracleDataSource" />
  <property name="dataSourceProperties" ref="props" />
  <property name="poolName" value="springHikariCP" />
</bean>

<bean id="dataSource" class="com.zaxxer.hikari.HikariDataSource">
      <constructor-arg ref="hikariConfig" />
</bean>

<util:properties id="props" location="classpath:datasource.properties"/>

在 database.properties 中你应该提供如下数据库的详细信息

url=jdbc:oracle:thin:@IP:port:SID/Databasename
 user=usernmae
 password=password

要获得正确的演示，您可以使用this link

回复于 2024-05-03T04:47:39+08:00

绝对可以使用C3P0，这是为企业解决方案而开发的 . 要检查优势，您可以follow this answer .

Here is the example code of integration:

@Bean
    public JpaTransactionManager transactionManager() {
        JpaTransactionManager transactionManager =
                new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(entityManagerFactory().getObject());
        return transactionManager;
    }

这个Bean用于获取 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;
}

这个Bean用于获取 LocalContainerEntityManagerFactoryBean . 它从 hibProperties() 获取 DataSource ， PersistenceProviderClass ，实体包名 PackagesToScan 和JpaProperties .

@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;
    }

在这里， env value are comming from application.properties .

检查波纹管属性：

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;
    }

它正在使用 ComboPooledDataSource ，它正在采用更多重要参数，如maxPoolSize，MinPoolSize，MaxIdleSize等. 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;
    }
}

另一件事 . 这是gradle链接

compile group: 'org.hibernate', name: 'hibernate-c3p0', version: '5.2.10.Final'

希望这会帮助你 . 谢谢：）

回复于 2024-05-03T04:47:39+08:00

Spring JDBC连接池的最佳实践

4 回答

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