我正在使用Spring Java配置,并编写一个带有几个Camel路由的控制台应用程序。我的应用程序中有多个属性来源,因此我使用了两个PropertyPlaceholderConfigurer
:
@Configuration
@Import(CamelConfig.class)
@ComponentScan(basePackageClasses = {App.class})
public class Config
{
final static String ENV = System.getProperty( "ENV" );
@Bean
public static BridgePropertyPlaceholderConfigurer properties()
{
final BridgePropertyPlaceholderConfigurer result = new BridgePropertyPlaceholderConfigurer();
result.setOrder( 0 );
result.setIgnoreUnresolvablePlaceholders( true );
result.setLocations( new ClassPathResource( "a/b/c/environments/base.properties" ),
new ClassPathResource( "a/b/c/environments/" + ENV + "/env.properties" ) );
return result;
}
@Bean
public static BridgePropertyPlaceholderConfigurer dlqAppProperties()
{
final YamlPropertiesFactoryBean yaml = new YamlPropertiesFactoryBean();
final BridgePropertyPlaceholderConfigurer result = new BridgePropertyPlaceholderConfigurer();
yaml.setResources( new ClassPathResource( "app.yaml" ) );
result.setOrder( 1 );
result.setIgnoreUnresolvablePlaceholders( true );
result.setProperties( yaml.getObject() );
return result;
}
}
根据此文档,我正在使用
BridgePropertyPlaceholderConfigurer
类将Spring属性用于Camel。它的配置也很简单:@Configuration
public class CamelConfig extends SingleRouteCamelConfiguration
{
@Override
protected CamelContext createCamelContext() throws Exception
{
final SpringCamelContext result = new SpringCamelContext( getApplicationContext() );
return result;
}
@Override
protected void setupCamelContext( CamelContext camelContext ) throws Exception
{
}
@Bean
@Override
public RouteBuilder route()
{
return (new Routes()).builder();
}
}
测试路由(Scala DSL)也很简单:
class Routes extends RouteBuilder {
"timer://{{foo}}?period=2s" ==> {
process((exchange) => {
exchange.getIn.setBody("test")
})
to("log:test")
}
}
但是上下文并没有以以下异常信息开头:
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'camelContext' defined in class path resource [a/b/c/config/CamelConfig.class]: Invocation of init method failed; nested exception is org.apache.camel.FailedToCreateRouteException: Failed to create route route1: Route(route1)[[From[timer://{{foo}}?period=2s]] -> [process[... because of Failed to resolve endpoint: timer://{{foo}}?period=2s due to: PropertiesComponent with name properties must be defined in CamelContext to support property placeholders.
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1566)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:84)
at a.b.c.App.main(App.java:13)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Caused by: org.apache.camel.FailedToCreateRouteException: Failed to create route route1: Route(route1)[[From[timer://{{foo}}?period=2s]] -> [process[... because of Failed to resolve endpoint: timer://{{foo}}?period=2s due to: PropertiesComponent with name properties must be defined in CamelContext to support property placeholders.
at org.apache.camel.model.RouteDefinition.addRoutes(RouteDefinition.java:182)
at org.apache.camel.impl.DefaultCamelContext.startRoute(DefaultCamelContext.java:770)
at org.apache.camel.impl.DefaultCamelContext.startRouteDefinitions(DefaultCamelContext.java:1914)
at org.apache.camel.impl.DefaultCamelContext.doStartCamel(DefaultCamelContext.java:1670)
at org.apache.camel.impl.DefaultCamelContext.doStart(DefaultCamelContext.java:1544)
at org.apache.camel.spring.SpringCamelContext.doStart(SpringCamelContext.java:179)
at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61)
at org.apache.camel.impl.DefaultCamelContext.start(DefaultCamelContext.java:1512)
at org.apache.camel.spring.SpringCamelContext.maybeStart(SpringCamelContext.java:228)
at org.apache.camel.spring.SpringCamelContext.afterPropertiesSet(SpringCamelContext.java:104)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1625)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1562)
... 16 more
Caused by: org.apache.camel.ResolveEndpointFailedException: Failed to resolve endpoint: timer://{{foo}}?period=2s due to: PropertiesComponent with name properties must be defined in CamelContext to support property placeholders.
at org.apache.camel.impl.DefaultCamelContext.getEndpoint(DefaultCamelContext.java:477)
at org.apache.camel.util.CamelContextHelper.getMandatoryEndpoint(CamelContextHelper.java:63)
at org.apache.camel.model.RouteDefinition.resolveEndpoint(RouteDefinition.java:192)
at org.apache.camel.impl.DefaultRouteContext.resolveEndpoint(DefaultRouteContext.java:106)
at org.apache.camel.impl.DefaultRouteContext.resolveEndpoint(DefaultRouteContext.java:112)
at org.apache.camel.model.FromDefinition.resolveEndpoint(FromDefinition.java:72)
at org.apache.camel.impl.DefaultRouteContext.getEndpoint(DefaultRouteContext.java:88)
at org.apache.camel.model.RouteDefinition.addRoutes(RouteDefinition.java:890)
at org.apache.camel.model.RouteDefinition.addRoutes(RouteDefinition.java:177)
... 27 more
Caused by: java.lang.IllegalArgumentException: PropertiesComponent with name properties must be defined in CamelContext to support property placeholders.
at org.apache.camel.impl.DefaultCamelContext.resolvePropertyPlaceholders(DefaultCamelContext.java:1121)
at org.apache.camel.impl.DefaultCamelContext.getEndpoint(DefaultCamelContext.java:475)
... 35 more
看起来桥梁不起作用(但我肯定可以在Spring中使用占位符)。可能的问题是什么?