将 Spring Integration 与 Spring MVC 结合使用时出现部署错误答案

【问题标题】：Deployment error while using Spring Integration with Spring MVC将 Spring Integration 与 Spring MVC 结合使用时出现部署错误
【发布时间】：2019-01-24 10:13:03
【问题描述】：

我在 Spring Boot 应用程序中对 SI 进行了 poc，在该应用程序中我能够从 TcpOutBoundGateway 发送和接收消息。现在我正在尝试将我的示例 spring 集成模块合并到我实际的企业 spring 应用程序中。

为此，我在企业应用程序中添加了 spring-integration.xml 并将其导入到 spring-core.xml 中

  <import resource="classpath:rx/spring-integration.xml" />

还将 spring-integration-ip 和 spring-integration-core 添加到 build.gradle 文件中。在我的服务类中，自动装配了我的 SI bean

<bean id="rxService" class="com.api.services.RxService"/>

这将创建要发送到网关的有效负载以及接收响应并解析结果并返回模型对象。但是在启动tomcat时，我收到以下错误。

01/24 13:15:46:228  ERROR [ContextLoader.java:312] Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'buildDetails': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'apiVersion' in value "${apiVersion}"
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:380)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1378)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:575)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:846)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:863)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:400)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:291)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:103)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4842)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5303)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1407)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1397)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'apiVersion' in value "${apiVersion}"
at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:172)
at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:124)
at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:237)
at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:211)
at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda$processProperties$0(PropertySourcesPlaceholderConfigurer.java:175)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:851)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1185)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1164)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374)
... 22 more
Jan 24, 2019 1:15:46 PM org.apache.catalina.core.StandardContext listenerStart

SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'buildDetails': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'apiVersion' in value "${apiVersion}"
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:380)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1378)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:575)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:846)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:863)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:400)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:291)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:103)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4842)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5303)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1407)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1397)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'apiVersion' in value "${apiVersion}"
at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:172)
at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:124)
at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:237)
at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:211)
at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda$processProperties$0(PropertySourcesPlaceholderConfigurer.java:175)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:851)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1185)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1164)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374)
... 22 more

这是我的 SI 配置，这是一个请求响应模型，其中客户端是我的应用程序

<?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"
xmlns:int-ip="http://www.springframework.org/schema/integration/ip"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/integration 
http://www.springframework.org/schema/integration/spring-integration.xsd
http://www.springframework.org/schema/integration/ip 
http://www.springframework.org/schema/integration/ip/spring-integration- 
ip.xsd">

<context:property-placeholder />

<int:gateway id="gw" service-interface=" com.api.rx.RxGateway"
    default-request-channel="objectOut" />

<int:channel id="objectOut" />

<int-ip:tcp-connection-factory id="client"
    type="client" host="10.236.249.XX" port="9XXX" single-use="false"
    so-timeout="50000000" using-nio="false" so-keep-alive="true"
    serializer="customDSerializer" deserializer="customDSerializer" />

<bean id="customDSerializer" class="com.api.rx.CustomSerializerDeserializer">
    <property name="maxMessageSize" value="4096" />
</bean>

<int-ip:tcp-outbound-gateway id="outGateway"
    request-channel="objectOut" reply-channel="toSA" connection-factory="client"
    request-timeout="10000000" reply-timeout="50000000" />

<int:service-activator input-channel="toSA"
    ref="rxService" method="parseResponse" />

<bean id="rxService" class="com.api.services.RxService"/>

<int:channel id="toSA" />
<int:channel id="bytesIn" />
</beans>

仅供参考 - 我们正在使用一个普通的 jar，它有一个名为 buildDetails 的 bean 和一个属性 - apiVersion。这是 gradle 多平面项目，我正在处理的模块有一个 buildDetails.properties 文件，其中有一个 key-apiVersion 和 value。

现在令人困惑的部分是 - 只有在 spring-core.xml 中导入 SI xml 时才会出现此部署错误，甚至不必自动装配其服务 bean。

如果您能验证我为将 SI 集成到我的应用程序中所做的步骤是否正确，将会很有帮助。

【问题讨论】：

你能告诉我们你的buildDetails.properties文件是如何加载到你的Spring配置中的吗？因为 Spring 似乎没有以某种方式看到它。
在 Spring-web.xml 中，<context:property-placeholder ignore-unresolvable="true" location="classpath:application.properties,classpath:application-${spring.profiles.active}.properties,classpath:buildDetails.properties,classpath:swaggerDocumentation.properties" />
此文件中的其他属性是否实际加载？您可以尝试添加一个前导斜杠 : classpath:/buildDetails.properties 吗？我记得当属性文件来自外部库时，有或没有这个前导斜杠会有不同的行为。
您说 SI 是从 spring-core.xml 导入的，但此评论说占位符配置位于 web.xml 中 - Web 上下文是根上下文的子项；根上下文看不到 web 上下文中的 bean（但 web 上下文中的 bean 可以看到根上下文中的 bean）。
为什么你的 SI 配置中有 property-placeholder？更多的是为什么它是空的？怎么去掉？

标签： spring spring-mvc spring-integration

【解决方案1】：

Web 上下文是根应用程序上下文的子级；如果属性在 web 上下文中，根上下文中的 bean 不能使用它们。

将属性移动到根上下文，以便它们对两者都可见。

【讨论】：