我的程序将json字符串消息发送到队列，将消息转换为json对象，然后调用服务激活器。服务激活器将json对象作为参数，并检查＆＃34;雇主＆＃34;属性在哈希表中，然后添加属性＆＃34; count＆＃34;到json对象：如果属性在表中，则count设置为1，如果不是，则设置为-1。
然后，更新的json对象将转换回字符串并发送到另一个队列。
但是，服务激活器不起作用。我收到此错误（完整的堆栈跟踪在附加的代码下）：
java.lang.NoSuchMethodError: org.springframework.messaging.MessageHandlingException:
method <init>(Lorg/springframework/messaging/Message;Ljava/lang/Throwable;)V not found
但该方法显然存在。为什么要求我把Throwable放在我的论点中？我尝试这样做然后得到了这个错误（完整的堆栈跟踪在附加的代码下）：
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.integration.config.ConsumerEndpointFactoryBean#2': Cannot resolve reference to bean 'org.springframework.integration.config.ServiceActivatorFactoryBean#0' while setting bean property 'handler'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.integration.config.ServiceActivatorFactoryBean#0': FactoryBean threw exception on object creation;
nested exception is java.lang.IllegalArgumentException: Target object of type [class SpringMessaging.MessageImprover] has no eligible methods for handling Messages.
我使用名为MessageCreator的类创建原始json字符串消息，然后使用名为MessageImprover的类来更新它。 代码：
package SpringMessaging;
public class MessageCreator {
public String messageJson;
public String employer;
public int sourceID;
public void add(String name, int age) {
messageJson = "{" +
"\"employer\": \"" + name + "\"" +
", \"sourceID\": " + age +
'}';
}
public String getJson(){
return messageJson;
}
}
消息改进者：
package SpringMessaging;
import java.util.HashMap;
import org.json.JSONObject;
public class MessageImprover {
public JSONObject improve(JSONObject object) {
int count;
HashMap<String, Integer> table = new HashMap<String, Integer>();
table.put("Icelantic", 8);
table.put("Nordica", 9);
table.put("Atomic", 10);
table.put("Volkl", 11);
table.put("Marker", 12);
if(table.containsKey(object.getString("employer"))) {
count = 1;
} else {
count = -1;
}
object.put("count", count);
return object;
}
}
json对象转换器的字符串：
import org.json.JSONObject;
public class stringtoJsonObject {
public JSONObject jsonFromString(String messageJson) {
JSONObject object = new JSONObject(messageJson);
return object;
}
}
配置：
发送：
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:int="http://www.springframework.org/schema/integration"
xmlns:int-amqp="http://www.springframework.org/schema/integration/amqp"
xmlns:rabbit="http://www.springframework.org/schema/rabbit" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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
http://www.springframework.org/schema/integration/amqp
http://www.springframework.org/schema/integration/amqp/spring-integration-amqp.xsd
http://www.springframework.org/schema/rabbit
http://www.springframework.org/schema/rabbit/spring-rabbit.xsd">
<rabbit:connection-factory id="connectionFactory" host="bigdata-rdp" username="myuser" password="mypass" />
<rabbit:template id="amqpTemplate" connection-factory="connectionFactory" />
<rabbit:admin connection-factory="connectionFactory" />
<rabbit:queue name="first" auto-delete="false" durable="true" />
<rabbit:queue name="second" auto-delete="false" durable="true" />
<rabbit:fanout-exchange name="first-exchange" auto-delete="true" durable="true">
<rabbit:bindings>
<rabbit:binding queue="first" />
</rabbit:bindings>
</rabbit:fanout-exchange>
<int:channel id="senderChannel">
</int:channel>
<int-amqp:outbound-channel-adapter channel="senderChannel" exchange-name="first-exchange" amqp-template="amqpTemplate" />
<int-amqp:outbound-gateway id="outbound" request-channel="senderChannel" exchange-name="first-exchange" amqp-template="amqpTemplate" />
<int:gateway id="Sender" service-interface="SpringMessaging.Sender" default-request-channel="senderChannel">
<int:method name="sendMessage" />
</int:gateway>
<int:poller default="true" fixed-rate="100"/>
</beans>
从第一个队列接收，转换，更新并发送到第二个队列：
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:int="http://www.springframework.org/schema/integration"
xmlns:int-amqp="http://www.springframework.org/schema/integration/amqp"
xmlns:rabbit="http://www.springframework.org/schema/rabbit" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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
http://www.springframework.org/schema/integration/amqp
http://www.springframework.org/schema/integration/amqp/spring-integration-amqp.xsd
http://www.springframework.org/schema/rabbit
http://www.springframework.org/schema/rabbit/spring-rabbit.xsd">
<rabbit:connection-factory id="connectionFactory" host="bigdata-rdp" username="myuser" password="mypass" />
<rabbit:template id="amqpTemplate" connection-factory="connectionFactory" />
<rabbit:admin connection-factory="connectionFactory" />
<rabbit:queue name="first" auto-delete="false" durable="true" />
<rabbit:queue name="second" auto-delete="false" durable="true" />
<int:poller default="true" fixed-rate="100"/>
<rabbit:fanout-exchange name="second-exchange" auto-delete="true" durable="true">
<rabbit:bindings>
<rabbit:binding queue="second" />
</rabbit:bindings>
</rabbit:fanout-exchange>
<int-amqp:outbound-channel-adapter channel="messageOutputChannel" exchange-name="second-exchange" amqp-template="amqpTemplate" />
<int-amqp:inbound-channel-adapter channel="messageInputChannel" queue-names="first" connection-factory="connectionFactory" />
<int:channel id="messageInputChannel" />
<int:channel id="jsonInputChannel"/>
<int:channel id="jsonOutputChannel"/>
<int:channel id="messageOutputChannel"/>
<int:transformer input-channel="messageInputChannel" output-channel="jsonInputChannel" ref="messageToJsonObjectConverter" method="jsonFromString" />
<bean id="messageToJsonObjectConverter" class="SpringMessaging.stringtoJsonObject" />
<int:service-activator input-channel="jsonInputChannel" output-channel="jsonOutputChannel" ref="jsonObjectTransformer" method="improve" />
<bean id="jsonObjectTransformer" class="SpringMessaging.MessageImprover" />
<int:object-to-string-transformer input-channel="jsonOutputChannel" output-channel="messageOutputChannel" />
</beans>
第一次错误的完整堆栈跟踪：
java.lang.NoSuchMethodError:
org.springframework.messaging.MessageHandlingException: method <init>(Lorg/springframework/messaging/Message;Ljava/lang/Throwable;)V not found
at org.springframework.integration.handler.MethodInvokingMessageProcessor.processMessage(MethodInvokingMessageProcessor.java:96)
at org.springframework.integration.handler.ServiceActivatingHandler.handleRequestMessage(ServiceActivatingHandler.java:89)
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:109)
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127)
at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:116)
at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:148)
at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:121)
at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:89)
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:423)
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:373)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:114)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:44)
at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:92)
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutput(AbstractMessageProducingHandler.java:358)
at org.springframework.integration.handler.AbstractMessageProducingHandler.produceOutput(AbstractMessageProducingHandler.java:269)
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutputs(AbstractMessageProducingHandler.java:186)
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:115)
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127)
at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:116)
at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:148)
at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:121)
at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:89)
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:423)
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:373)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:114)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:44)
at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:92)
at org.springframework.integration.endpoint.MessageProducerSupport.sendMessage(MessageProducerSupport.java:188)
at org.springframework.integration.amqp.inbound.AmqpInboundChannelAdapter.access$1100(AmqpInboundChannelAdapter.java:56)
at org.springframework.integration.amqp.inbound.AmqpInboundChannelAdapter$Listener.processMessage(AmqpInboundChannelAdapter.java:246)
at org.springframework.integration.amqp.inbound.AmqpInboundChannelAdapter$Listener.onMessage(AmqpInboundChannelAdapter.java:203)
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:822)
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:745)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$001(SimpleMessageListenerContainer.java:97)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$1.invokeListener(SimpleMessageListenerContainer.java:189)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.invokeListener(SimpleMessageListenerContainer.java:1276)
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:726)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:1219)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:1189)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$1500(SimpleMessageListenerContainer.java:97)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1421)
at java.lang.Thread.run(Thread.java:748)
org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer run
SEVERE: Stopping container from aborted consumer
org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer doShutdown
INFO: Waiting for workers to finish.
org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer doShutdown
INFO: Successfully waited for workers to finish.
如果我将Throwable V放入＆＃34的参数中，那么完全堆栈跟踪;改进＆＃34;：
Exception in thread "main"
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.integration.config.ConsumerEndpointFactoryBean#2': Cannot resolve reference to bean 'org.springframework.integration.config.ServiceActivatorFactoryBean#0' while setting bean property 'handler'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.integration.config.ServiceActivatorFactoryBean#0': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: Target object of type [class SpringMessaging.MessageImprover] has no eligible methods for handling Messages.
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:359)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:108)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1531)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1276)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:742)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at SpringMessaging.Main.main(Main.java:15)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name
'org.springframework.integration.config.ServiceActivatorFactoryBean#0': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: Target object of type [class SpringMessaging.MessageImprover] has no eligible methods for handling Messages.
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:175)
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:103)
at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1634)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:254)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:351)
... 15 more
我不明白为什么它甚至要求我把Throwable作为一个参数来改善＆＃34;改善＆＃34;方法。有什么想法吗？
答案 0 :(得分：0)
java.lang.NoSuchMethodError:
org.springframework.messaging.MessageHandlingException: method <init>(Lorg/springframework/messaging/Message;Ljava/lang/Throwable;)V not found
StackTrace下面应该有一些cause。换句话说，你不能展示整个画面。
第二种情况很清楚。您的签名如下：
JSONObject improve(JSONObject object, Throwable e)
框架无法理解未来消息中哪个方法参数会对payload进行处理。
我非常确定NoSuchMethodError与service-activator定义无关。下游还有其他东西。