如何使用駱駝的消息在Spring XML

Question

駱駝documentation for Message Filter過濾豆顯示了使用「過濾豆」，像這樣幾個Java DSL例子：

from("direct:start") 
    .filter().method(MyBean.class, "isGoldCustomer").to("mock:result").end() 
    .to("mock:end"); 

public static class MyBean { 
    public boolean isGoldCustomer(@Header("level") String level) { 
     return level.equals("gold"); 
    } 
} 

但該網頁不展示如何調用該豆在Spring XML：

<route id="my-route"> 
    <from uri="direct:a" /> 
    <filter> 
     <method>??? how to call MyBean#isGoldCustomer from here???</method> 
     <to uri="direct:b" /> 
    </filter> 
</route> 

在上面的代碼中，我該如何電線我<filter/>一個Java bean，什麼接口，這是否的Java bean需要執行/擴展？

Answer 1

你應該能夠做到這一點是這樣的：

<bean id="myCustomPredicate" class="com.hveiga.test.MyCustomPredicate"/> 

<route id="my-route"> 
    <from uri="direct:a" /> 
    <filter> 
     <method ref="myCustomPredicate" /> 
     <to uri="direct:b" /> 
    </filter> 
</route> 

Answer 2

<bean id="myCustomPredicate" class="com.hveiga.test.MyCustomPredicate"/> 
<route id="my-route"> 
    <from uri="direct:a" /> 
    <filter> 
     <method ref="myCustomPredicate" method="myCustomPredicateMethod"/> 
     <to uri="direct:b" /> 
    </filter> 
</route>