how to convert jndi lookup from xml to java config

问题:

Currently I'm converting the xml to java config. But I stuck at some part that I have been research for several days. Here the problem:

Xml config:

     <jee:jndi-lookup id="dbDataSource" jndi-name="${db.jndi}" resource-ref="true" />       <beans:bean id="jdbcTemplate"      class="org.springframework.jdbc.core.JdbcTemplate" >      <beans:property name="dataSource" ref="dbDataSource"></beans:property>      </beans:bean> 

So far I managed to convert this code:

<jee:jndi-lookup id="dbDataSource" jndi-name="${db.jndi}" resource-ref="true" />

to this :

@Bean(name = "dbDataSource") public JndiObjectFactoryBean dataSource() {    JndiObjectFactoryBean bean = new JndiObjectFactoryBean();    bean.setJndiName("${db.jndi}");    bean.setResourceRef(true);     return bean;  } 

And this :

     <beans:bean id="jdbcTemplate"      class="org.springframework.jdbc.core.JdbcTemplate" >      <beans:property name="dataSource" ref="dbDataSource"></beans:property>      </beans:bean> 

to this:

@Bean(name = "jdbcTemplate") public JdbcTemplate jdbcTemplate() {     JdbcTemplate jt = new JdbcTemplate();     jt.setDataSource(dataSource);     return jt;    } 

The problem is the method setDataSource() need DataSource object but I'm not sure how to relate both bean.How to pass the JndiObjectFactoryBean to DataSource?

Or do I need to use another method?

Extra Question:

The bean.setJndiName("${db.jndi}") , ${db.jndi} is refer to properties file but I always got NameNotFoundException, How to make it work?

Thanks!!

回答1:

Instead of JndiObjectFactoryBean use a JndiDataSourceLookup instead. To use the ${db.jndi} in the method declare a method argument and annotate it with @Value.

@Bean(name = "dbDataSource") public DataSource dataSource(@Value("${db.jndi}" String jndiName) {     JndiDataSourceLookup lookup = new JndiDataSourceLookup();     return lookup.getDataSource(jndiName); } 

Autowired methods and constructors can also use the @Value annotation. -- Spring Reference Guide.

@Bean methods are basically factory methods which are also auto wired methods and as such fall into this category.

In your factory method for the JdbcTemplate you can simply use a DataSource method argument to get a reference to the datasource (If you have multiple you can use the @Qualifier on the method argument to specify which one you want to use).

@Bean public JdbcTemplate jdbcTemplate(DataSource ds) {      return new JdbcTemplate(ds); } 

文章来源: how to convert jndi lookup from xml to java config