Bean属性“ channelIdentifierMap”不可写或具有无效的setter方法

Question

I'm using Spring integration 4.0 and I tried to create a payloadTypeRouter object that has 2 message channels - one for String payloads and one for Integer payloads. I'm trying to do so by the following java code:

package MessageExamples;
import org.springframework.messaging.Message;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.integration.router.PayloadTypeRouter;
public class Test {
public static void main(String[] args) {
QueueChannel q_channel1=new QueueChannel();
QueueChannel q_channel2=new QueueChannel();
ApplicationContext ctx= new ClassPathXmlApplicationContext("SpringIntegration.xml");
PayloadTypeRouter r= (PayloadTypeRouter) ctx.getBean("payloadTypeRouter");
}}

With the following configuration:

<?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:int="http://www.springframework.org/schema/integration"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/integration
http://www.springframework.org/schema/integration/spring-integration.xsd">
    <bean id="payloadTypeRouter"
    class="org.springframework.integration.router.PayloadTypeRouter">
    <property name="channelIdentifierMap">
    <map>
    <entry key="java.lang.String" value-ref="stringChannel"/>
    <entry key="java.lang.Integer" value-ref="integerChannel"/>
    </map>
    </property>
    </bean>
    <int:channel id="stringChannel"/>
    <int:channel id="integerChannel"/>
    </beans>

When I try to run it I get the following error message:

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'payloadTypeRouter' defined in class path resource [SpringIntegration.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'channelIdentifierMap' of bean class [org.springframework.integration.router.PayloadTypeRouter]: Bean property 'channelIdentifierMap' is not writable or has an invalid setter method.

I've noticed that AbstractMessageRouter doesn't contain a map setter in Spring Integration version 4.0 although it has one in previous versions. How can I configurate this kind of router?

Answer 1

I think that you don't need the last channels definitions. According to the docs, you only need:

<bean id="payloadTypeRouter"
      class="org.springframework.integration.router.PayloadTypeRouter">
    <property name="channelIdentifierMap">
        <map>
            <entry key="java.lang.String" value-ref="stringChannel"/>
            <entry key="java.lang.Integer" value-ref="integerChannel"/>
        </map>
    </property>
</bean>

Or, an equivalent definition:

<int:payload-type-router input-channel="routingChannel">
    <int:mapping type="java.lang.String" channel="stringChannel" />
    <int:mapping type="java.lang.Integer" channel="integerChannel" />
</int:payload-type-router>

Answer 2

The property was renamed to channelMapping several years ago (in 2.1); I have opened a JIRA Issue to fix the documentation.

Thanks for pointing this out.