春季(MVC)4.0.3,JAVA 1.7.0_71下,Tomcat 7.0.57,Windows 7的为什么被初始化两次
我有一个Spring MVC应用程序,与2周的ApplicationContexts,该applicationContextRoot装有弹簧豆:
AbstractAnnotationConfigDispatcherServletInitializer: protected Class<?>[] getRootConfigClasses {
return new Class<?>[] { AppConfig.class }
}
WebApplicationContext被加载。
protected Class<?>[] getServletConfigClasses() {
return new Class<?>[] {WebMvcConfig.class};
}
了AppConfig类包含焦点bean的bean定义(Dropwizard的MetricRegistry
)
@Configuration
public class AppConfig {
...
@Bean
public MetricRegistry metricRegistry() {
MetricRegistry result = new MetricRegistry();
LOG.info("testing", new Exception("trace me"));
configureReporters(result);
return result;
}
我看到trace me stacktrace
叫了两声。堆栈跟踪是不同的:
....zipped
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482) [spring-context-4.0.3.RELEASE.jar:4.0.3.RELEASE]
> at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) [spring-web-4.0.3.RELEASE.jar:4.0.3.RELEASE]
> at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) [spring-web-4.0.3.RELEASE.jar:4.0.3.RELEASE]
> at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) [spring-web-4.0.3.RELEASE.jar:4.0.3.RELEASE]
> at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4992) [catalina.jar:7.0.57]
> at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5492) [catalina.jar:7.0.57]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [catalina.jar:7.0.57]
对比(几个msecs之后)。
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482) [spring-context-4.0.3.RELEASE.jar:4.0.3.RELEASE]
> at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:658) [spring-webmvc-4.0.3.RELEASE.jar:4.0.3.RELEASE]
> at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:530) [spring-webmvc-4.0.3.RELEASE.jar:4.0.3.RELEASE]
> at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:484) [spring-webmvc-4.0.3.RELEASE.jar:4.0.3.RELEASE]
> at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136) [spring-webmvc-4.0.3.RELEASE.jar:4.0.3.RELEASE]
> at javax.servlet.GenericServlet.init(GenericServlet.java:158) [servlet-api.jar:3.0.FR]
> at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1284) [catalina.jar:7.0.57]
> at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1090) [catalina.jar:7.0.57]
> at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5231) [catalina.jar:7.0.57]
> at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5518) [catalina.jar:7.0.57]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [catalina.jar:7.0.57]
第一次豆在web.context.ContextLoader
上下文而其在web.servlet.FrameworkServlet
web.xml中创建的第二时间创建的是从安全约束开空的,则初始化经由的AbstractAnnotationConfigDispatcherServletInitializer
一个实例进行我不确定这种行为的影响,但不是我所期望的(bean是singleton等)。如果我将每个@autowired
注释都删除到这个bean,这种行为仍然存在。我确实检查了只有一个@componentscan(在WebMvcConfig中)
听起来好像你在'WebMvcConfig'组件扫描,但不排除'Configuration'类。例如'@ComponentScan(basePackages = {“mypackage”},excludeFilters = @ ComponentScan.Filter(type = FilterType.ANNOTATION,value = Configuration.class))' – beerbajay
@beerbajay谢谢!如果你让它成为答案,我会奖励它。 –