配置profile bean

配置profile bean

　　在Java配置中使用@Profile注解指定某个bean属于哪一个profile

package chapter3;

import javax.sql.DataSource;

import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;

@Configuration
@Profile("dev")
public class DevelopmentProfileConfig {
　　@Bean(destoryMethod="shutdown")
    public DataSource dataSource() {
        return new EmbeddedDatabaseBuilder()
                .setType(EmbeddedDatabaseType.H2)
                .addScript("classpath:schema.sql")
                .build();
    }
}

　　@profile注解应用在类级别上，它会告诉Spring这个配置类中的bean只有在dev profile激活时才会创建；如果dev profile没有激活的话，那么带有该注解的bean就会被忽略。

　 @Profile注解除了在类级别上，从Spring3.2 开始，也可以在方法级别上使用@Profile注解，与@Bean注解一起使用。

package chapter3;

import javax.sql.DataSource;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
import org.springframework.jndi.JndiObjectFactoryBean;

@Configuration
public class DataSourceConfig {
    
    @Bean(destroyMethod="shutdown")
    @Profile("dev")
    public DataSource devDataSource() {
        return new EmbeddedDatabaseBuilder()
                .setType(EmbeddedDatabaseType.H2)
                .addScript("classpath:schema.sql")
                .build();
    }
    
    @Bean
    @Profile("prod")
    public DataSource prodDataSource() {
        JndiObjectFactoryBean jndiObjectFactoryBean = new JndiObjectFactoryBean();
        jndiObjectFactoryBean.setJndiName("jdbc/myds");
        jndiObjectFactoryBean.setResourceRef(true);
        jndiObjectFactoryBean.setProxyInterface(javax.sql.DataSource.class);
        return (DataSource) jndiObjectFactoryBean.getObject();
    }
    
}

　　尽管多个profile bean都被生命在一个配置类中，但是只有当规定的profile激活时，相应的bean才会被创建，当然没有@Profile注解的bean不受其影响。

在XML中配置profile

　　通过<beans>元素的profile属性，在XML配置profile bean

 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:c="http://www.springframework.org/schema/c"
    xmlns:util="http://www.springframework.org/schema/util"
    xmlns:p="http://www.springframework.org/schema/p" 
    xmlns:jdbc="http://www.springframework.org/schema/jdbc"
    xsi:schemaLocation="http://www.springframework.org/schema/jdbc 
　　　　 http://www.springframework.org/schema/jdbc/spring-jdbc-4.3.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.3.xsd"
        profile="dev">
    <jdbc:embedded-database id="dataSource">
        <jdbc:script location="classpath:schema.sql"/>
    </jdbc:embedded-database>
    
</beans>

 

       在<beans>元素中嵌套定义<beans>元素将所有的profile bean定义在一个profile XML配置文件中。

 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:c="http://www.springframework.org/schema/c"
    xmlns:util="http://www.springframework.org/schema/util"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:jdbc="http://www.springframework.org/schema/jdbc"
    xmlns:jee="http://www.springframework.org/schema/jee"
    xsi:schemaLocation="http://www.springframework.org/schema/jdbc 
　　     http://www.springframework.org/schema/jdbc/spring-jdbc-4.3.xsd
        http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.3.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.3.xsd">
    
    <beans profile="dev">
        <jdbc:embedded-database id="dataSource">
            <jdbc:script location="classpath:schema.sql" />
        </jdbc:embedded-database>
    </beans>
    
    <beans profile="qa">
        <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
            destroy-method="close" p:url="jdbc:h2:tcp://dsserver/~/test"
            p:driverClassName="org.h2.Driver"
            p:username="sa"
            p:password="password"
            p:initialSize="20"
            p:maxActive="30"
        >
        </bean>
    </beans>
    
    <beans profile="prod">
        <jee:jndi-lookup id="dataSource" jndi-name="jdbc/myDatabase" 
            resource-ref="true" proxy-interface="javax.sql.DataSource">
        </jee:jndi-lookup>
    </beans>
</beans>