为什么不同的 bean 会装配到同一个 component ? - V2EX
lxy
V2EX    Java

为什么不同的 bean 会装配到同一个 component ?

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  •   lxy Apr 12, 2018 1737 views
    This topic created in 2952 days ago, the information mentioned may be changed or developed.

    SpringMVC。如果我想让不同的 bean 也装配不同的 component 应该怎么做? 配置大概是这样:

    <!--Listener--> <bean id="MyListener" class="com.example.MyListener" scope="prototype"/> 

    简化的例子

     // MyListener.java @Aync public class MyListener implements ApplicationListener<MyEvent> { @Autowired private MyExecutor myExecutor; private String listenerId; @Override public void onApplicationEvent(MyEvent myEvent) { this.listenerId = myEvent.getId(); this.myExecutor.setId(myEvent.getId()); // sleep 5s System.out.println(this.listenerId); } } // MyExecutor.java @Component public class MyExecutor { private String exeId; public void setId(Stirng id) { this.exeId = id; try { Thread.sleep(5000); } catch (InterruptedException e) { } System.out.println(this.exeId); } } 

    如果在 5 秒内连发两个 ID 不同的 Event,那么会看到 Event 由不同的 Listener 处理,但是执行了相同的 myExecutor。

    也试过增加这个配置,不行。

    <!--Executor--> <bean id="MyExecutor" class="com.example.MyExecutor" scope="prototype"/> 
    Supplement 1    Apr 13, 2018

    惊了,这么简单的问题。按如下配置即可。Listener 还要加个setMyExecutor方法。

    <!--Listener--> <bean id="MyListener" class="com.example.MyListener" scope="prototype"> <property name="myExecutor" ref="MyExecutor"/> </bean> <!--Executor--> <bean id="MyExecutor" class="com.example.MyExecutor" scope="prototype"/> 
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