我有一些代码,其中属性只能在运行时知道。
在这种情况下,用户可以输入URL和用户名和密码。
ConnectionFactory cf = (ConnectionFactory) this.factory.getBean(
"topicConnectionFactory", <URL which is entered at runtime>)
final UserCredentialsConnectionFactoryAdapter connectionFactory = this.factory
.getBean(UserCredentialsConnectionFactoryAdapter.class);
connectionFactory.setTargetConnectionFactory(cf);
UserCredentialsConnectionFactoryAdapter 没有构造函数基础设置,因此唯一的方法是使用no-arg构造函数创建并在之后设置属性,但是spring运行InitializingBean,抛出TargetConnectionFactory的错误没有设定。
有没有办法在Spring创建过程中传递这些信息,或者春天延迟Bean的初始化。
为了理解范围,下面是弹簧配置的部分。
<bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate"
scope="prototype" />
<bean id="userCredentialsConnectionFactory" class="org.springframework.jms.connection.UserCredentialsConnectionFactoryAdapter"
scope="prototype" >
</bean>
<bean id="cachingFactory"
class="org.springframework.jms.connection.CachingConnectionFactory"
scope="prototype" />
<bean id="tibcoTopicConnectionFactory" class="com.tibco.tibjms.TibjmsTopicConnectionFactory"
scope="prototype" />
如上所述,url,用户名和密码在运行时才知道并且可以更改。该应用程序是多线程的。想法是连接到某个地方,发送消息,断开连接
答案 0 :(得分:1)
您可以执行以下操作:
使用UserCredentialsConnectionFactoryAdapter
作为构造函数参数编写自己的ConnectionFactory
扩展名:
public class CustomUserCredentialsConnectionFactoryAdapter extends UserCredentialsConnectionFactoryAdapter {
public CustomUserCredentialsConnectionFactoryAdapter(ConnectionFactory target){
super();
setTargetConnectionFactory(target);
}
}
然后像这样使用它:
ConnectionFactory cf = (ConnectionFactory) this.factory.getBean(
"topicConnectionFactory", <URL which is entered at runtime>)
final UserCredentialsConnectionFactoryAdapter connectionFactory = this.factory
.getBean("userCredentialsConnectionFactory", cf);
不要忘记更改bean decaration:
<bean id="userCredentialsConnectionFactory"
class="com.company.CustomUserCredentialsConnectionFactoryAdapter"
scope="prototype" >
</bean>