Question

我正在继续研究SI，同时我正在尝试构建一个应用程序。

我的申请流程如下：

读取XML文件并拆分每个标记
每个标记都定义了一个名为“interval”的属性，我需要根据此值创建一个将重复的作业。
当作业执行终止时，需要调用Web服务来存储信息
如果WBS调用失败，请尝试通过电子邮件发送信息

现在我已到达此流程的第一点（：D），现在我正在尝试向前移动并首先检查错误处理（流程的第4点）。

这是我的实际配置，这可以很好地拆分标签，然后调用右service-activator：

<context:component-scan base-package="it.mypkg" />

<si:poller id="poller" default="true" fixed-delay="1000"/>

<si:channel id="rootChannel" />

<si-xml:xpath-splitter id="mySplitter" input-channel="rootChannel" output-channel="routerChannel" create-documents="true">
    <si-xml:xpath-expression expression="//service" />
</si-xml:xpath-splitter>

<si-xml:xpath-router id="router" input-channel="routerChannel" evaluate-as-string="true">
    <si-xml:xpath-expression expression="concat(name(./node()), 'Channel')" />
</si-xml:xpath-router>

<si:service-activator input-channel="serviceChannel" output-channel="endChannel">
    <bean class="it.mypkg.Service" />
</si:service-activator>

endChannel需要接收来自多个频道的所有消息（由路由器发送），然后调用WBS。 现在我正在创建类来检查流程是否有效。

我的applicationContext.xml的剩余部分是：

  <!-- Create a poller that will be used by endChannel -->
<si:poller id="poller" default="true" fixed-delay="1000" error-channel="failedInvocationChannel" />

<!--- take messages from serviceChannel and redirect to endChannel, that is responsable to receive messages from all channels created by the router -->
<si:service-activator input-channel="serviceChannel" output-channel="endChannel">
    <bean class="it.mypkg.Service" />
</si:service-activator>

 <!-- end channel is a queue -->
<si:channel id="endChannel">
    <si:queue capacity="10"/>
</si:channel>

<!-- Messages are taken from the queue.. -->
<si:service-activator input-channel="endChannel">
    <bean class="it.mypkg.Invokator" />
</si:service-activator>

<!-- Service activator that handle the errors on the queue -->
<si:channel id="failedInvocationChannel" />

<si:service-activator input-channel="failedInvocationChannel">
    <bean class="it.mypkg.Resubmitter" />
</si:service-activator>

但是当我运行我的应用程序时，我收到了这个错误：

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.integration.handler.MessageHandlerChain#0': Cannot create inner bean 'org.springframework.integration.handler.MessageHandlerChain#0$child#1.handler' of type [org.springframework.integration.config.ServiceActivatorFactoryBean] while setting bean property 'handlers' with key [1]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.integration.handler.MessageHandlerChain#0$child#1.handler': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: Target object of type [class org.springframework.integration.channel.QueueChannel] has no eligible methods for handling Messages.
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:313)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:122)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedList(BeanDefinitionValueResolver.java:382)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:157)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1481)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1226)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
    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:772)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:838)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:197)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:172)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:158)

我已经阅读了很多内容，我对可以使用的所有组件有点困惑......也许我的错误是因为我试图以错误的方式使用组件......

编辑：使用轮询器和已删除链上的错误通道更新配置以处理错误

Answer 1

<si:service-activator ref="endChannel" method="dispatch" />

您不能在服务激活器中使用引用。

另外，最好像链id这样的元素，这样异常就更容易调试。

此外，您通常不应该操纵errorChannel标题;最好将error-channel添加到轮询器并以这种方式路由错误流。

弹簧集成 - 带错误处理的流程

1 个答案: