使用spring boot 2.2.4更新到camel 3.0.0-RC3后，Camel在文本属性中找不到{{xxx}} [英] Camel cannot find {{xxx}} in properties from text after update to camel 3.0.0-RC3 using spring boot 2.2.4

问题描述

我用的是spring boot 2.2.4.RELEASE和camel版本2.23.0

I was using spring boot 2.2.4.RELEASE and camel version 2.23.0

为了使骆驼可以访问属性并使用 {{ }}

In order to make camel have access to properties and use them in uri routes using {{ }}

添加 camel-spring-boot-starter 依赖并定义 PropertySourcesPlaceholderConfigurer, SpringCamelContext bean 足以让它工作

adding camel-spring-boot-starter dependency and defining PropertySourcesPlaceholderConfigurer, SpringCamelContext bean was enough to make it work

@SpringBootApplication
@PropertySource(ignoreResourceNotFound = false, value= {"classpath:myProperties.properties"})
public class MyApp {

    ...
    @Bean
    public SpringCamelContext camelContext(ApplicationContext applicationContext) {
        return new SpringCamelContext(applicationContext);
    }

    @Bean
    public static PropertySourcesPlaceholderConfigurer propertyConfigInDev() {
        return new PropertySourcesPlaceholderConfigurer();
    }
}

--

现在，在我按照迁移指南将 camel-spring-boot-starter 更新为 3.0.0-RC3 并修复了组件的导入之后.在运行时，骆驼找不到属性，我得到了这个:

Now, after I updated camel-spring-boot-starter to 3.0.0-RC3 following the migration guide and after fixing the imports for the components. On runtime, camel cannot find properties and I get this:

在文本属性中找不到键 [xxx] 的属性:activemq:queue:{{xxx}}

任何想法发生了什么变化以及为什么 {{ }} 在我的路线中不再起作用?

Any Ideas what changed and why {{ }} is not working anymore in my routes?

更新 1

我将 spring boot 更新为 2.2.6.RELEASE 和 camel-spring-boot-starter 从 更新为 3.2.0org.apache.camel.springboot 我仍然得到同样的东西......

I updated spring boot to 2.2.6.RELEASE and camel-spring-boot-starter to 3.2.0 from org.apache.camel.springboot I am still getting the same thing...

路线并不花哨.

我需要 {{ }} 从 myProperties.properties

使用 @Value("${xxx}") 有效，spring可以访问它，我可以将它传递给路由URI字符串.

Using @Value("${xxx}") works, spring can access it, and I could pass it to the route URI String.

在骆驼 URI 中访问 {{xxx}} 是更新后停止工作的原因.

Accessing {{xxx}} in camel URIs is what stopped working after the update.

@Component
public class MyRoutes extends RouteBuilder {
    @Override
    public void configure() throws Exception {
        from("activemq:queue:{{xxx}}")
            .to("activemq:topic:targetTopic");
    }
}

<小时>

更新 2

我反映了接受答案所做的测试.删除 SpringCamelContext 和 PropertySourcesPlaceholderConfigurer bean 就可以了.

I mirrored the test made by accepted answer. Removing SpringCamelContext and PropertySourcesPlaceholderConfigurer beans did the trick.

我删除了 bean SpringCamelContext 并且它起作用了.显然，这个新的 spring camel starter 自己处理了 SpringCamelContext 并且我的 bean 使用 {{ }}

I removed the bean SpringCamelContext and it worked. Apparently this new spring camel starter takes care of SpringCamelContext by itself and my bean overrode the auto configuration related to camel reading properties using {{ }}

我还删除了 bean PropertySourcesPlaceholderConfigurer 并且 @Value 没有停止工作.

I also removed the bean PropertySourcesPlaceholderConfigurer and @Value did not stop working.

推荐答案

你在你的spring boot应用中使用了application.properties文件吗?如果是这样 {{}} 应该可以工作.不过，查看您的骆驼代码会有所帮助.

Are you using the application.properties file in your spring boot application? If so {{}} should work. It would help to see your camel code though.

编辑 1:

这对我有用.我正在使用 Spring Boot 2.2.6 运行 Camel 3.2.0.我的类路径中的文件 myProperties.properties 中有一个属性 prop=Hello World.我不必定义 PropertySourcesPlaceholderConfigurer 和 SpringCamelContext beans

This works for me. I am running Camel 3.2.0 with Spring Boot 2.2.6. I have a single property prop=Hello World in a file myProperties.properties in my classpath. I did not have to define the PropertySourcesPlaceholderConfigurer and SpringCamelContext beans

@SpringBootApplication
@PropertySource(ignoreResourceNotFound = false, value = {"classpath:myProperties.properties"})
public class DemoApplication extends RouteBuilder{

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

    @Override
    public void configure() throws Exception {
        from("timer:foo?repeatCount=1")
        .log("{{prop}}");
    }
}

日志

2020-04-28 21:26:57.904  INFO 10392 --- [  restartedMain] o.a.c.impl.engine.AbstractCamelContext   : Route: route6 started and consuming from: timer://foo
2020-04-28 21:26:57.921  INFO 10392 --- [  restartedMain] o.a.c.impl.engine.AbstractCamelContext   : Total 1 routes, of which 1 are started
2020-04-28 21:26:57.937  INFO 10392 --- [  restartedMain] o.a.c.impl.engine.AbstractCamelContext   : Apache Camel 3.2.0 (CamelContext: camel-6) started in 0.067 seconds
2020-04-28 21:26:57.938  INFO 10392 --- [  restartedMain] c.p.testproperties.DemoApplication       : Started DemoApplication in 0.406 seconds (JVM running for 82.808)
2020-04-28 21:26:57.955  INFO 10392 --- [  restartedMain] .ConditionEvaluationDeltaLoggingListener : Condition evaluation unchanged
2020-04-28 21:26:58.920  INFO 10392 --- [4 - timer://foo] route6                                   : Hello World

编辑 2:

您可能正在从交易所取回您的财产，这可能会导致此问题.自 Camel 版本 3.0.0 以来，从交换中获取属性已更改.你可以试试exchangeProperty("xxx")

You may be fetching your property from the Exchange, which may cause this issue. Fetching properties from the exchange has been changed since Camel version 3.0.0. Can you try exchangeProperty("xxx")

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