Autowired field is null, but not on constructor auto-provisioning

Question

Autowired field is null, but not on constructor auto-provisioning

I have a component that auto-grows some other beans:

@Component
public class MyComponent {
    @Autowired
    private Environment env; // null

    @Autowired
    public MyComponent(ConfigurationUtils configUtils /* not null */) {
    }
}

When adding a parameter Environment env

as a parameter to a constructor, it is also nonzero.

But why?

UPDATE

@Component
public class MyComponent implements InitializingBean {
    private final Logger log = LoggerFactory.getLogger(getClass());

    @Autowired
    private Environment env; // TODO: null

    @Autowired
    public MyComponent(ConfigurationUtils configUtils) {
        log.debug("configUtils == null: " + (configUtils == null));
        log.debug("env == null: " + (env == null));
        log.debug(env.getProperty("foo")); // to trigger NPE
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        log.debug("Initialized environment: " + env);
    }
}

console output:

DEBUG c.e.MyComponent - configUtils == null: false
DEBUG c.e.MyComponent - env == null: true
WARN  o.s.w.c.s.AnnotationConfigWebApplicationContext - Exception encountered during context initialization - cancelling refresh attempt
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myComponent' defined in URL [jar:file:/var/lib/tomcat7/webapps/site/WEB-INF/lib/site-0.0.1-SNAPSHOT.jar!/com/example/MyComponent.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.example.MyComponent]: Constructor threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:278) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1133) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1036) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:505) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:229) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:725) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757) ~[spring-context-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480) ~[spring-context-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) [spring-web-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) [spring-web-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) [spring-web-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4971) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:632) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1073) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:553) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1648) [tomcat-catalina-7.0.52.jar:7.0.52]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_65]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_65]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_65]
    at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_65]
    at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) [tomcat-coyote-7.0.52.jar:7.0.52]
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) [na:1.7.0_65]
    at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) [na:1.7.0_65]
    at org.apache.catalina.manager.ManagerServlet.check(ManagerServlet.java:1445) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.manager.ManagerServlet.deploy(ManagerServlet.java:677) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.manager.ManagerServlet.doPut(ManagerServlet.java:435) [tomcat-catalina-7.0.52.jar:7.0.52]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:649) [servlet-api-3.0.jar:na]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) [servlet-api-3.0.jar:na]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:610) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040) [tomcat-coyote-7.0.52.jar:7.0.52]
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607) [tomcat-coyote-7.0.52.jar:7.0.52]
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313) [tomcat-coyote-7.0.52.jar:7.0.52]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_65]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_65]
    at java.lang.Thread.run(Thread.java:745) [na:1.7.0_65]
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.example.MyComponent]: Constructor threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:163) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:125) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:270) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    ... 54 common frames omitted
Caused by: java.lang.NullPointerException: null
    at com.example.MyComponent.<init>(MyComponent.java:23) ~[site-0.0.1-SNAPSHOT.jar:na]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.7.0_65]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) ~[na:1.7.0_65]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.7.0_65]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:526) ~[na:1.7.0_65]
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    ... 56 common frames omitted
ERROR o.s.web.context.ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myComponent' defined in URL [jar:file:/var/lib/tomcat7/webapps/site/WEB-INF/lib/site-0.0.1-SNAPSHOT.jar!/com/example/MyComponent.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.example.MyComponent]: Constructor threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:278) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1133) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1036) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:505) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:229) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:725) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757) ~[spring-context-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480) ~[spring-context-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) ~[spring-web-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) ~[spring-web-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) [spring-web-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4971) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:632) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1073) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:553) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1648) [tomcat-catalina-7.0.52.jar:7.0.52]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_65]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_65]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_65]
    at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_65]
    at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) [tomcat-coyote-7.0.52.jar:7.0.52]
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) [na:1.7.0_65]
    at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) [na:1.7.0_65]
    at org.apache.catalina.manager.ManagerServlet.check(ManagerServlet.java:1445) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.manager.ManagerServlet.deploy(ManagerServlet.java:677) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.manager.ManagerServlet.doPut(ManagerServlet.java:435) [tomcat-catalina-7.0.52.jar:7.0.52]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:649) [servlet-api-3.0.jar:na]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) [servlet-api-3.0.jar:na]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:610) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) [tomcat-catalina-7.0.52.jar:7.0.52]
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040) [tomcat-coyote-7.0.52.jar:7.0.52]
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607) [tomcat-coyote-7.0.52.jar:7.0.52]
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313) [tomcat-coyote-7.0.52.jar:7.0.52]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_65]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_65]
    at java.lang.Thread.run(Thread.java:745) [na:1.7.0_65]
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.example.MyComponent]: Constructor threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:163) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:125) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:270) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    ... 54 common frames omitted
Caused by: java.lang.NullPointerException: null
    at com.example.MyComponent.<init>(MyComponent.java:23) ~[site-0.0.1-SNAPSHOT.jar:na]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.7.0_65]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) ~[na:1.7.0_65]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.7.0_65]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:526) ~[na:1.7.0_65]
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    ... 56 common frames omitted

+3

java spring dependency-injection autowired

dtrunk 27 nov. 14 at 13:53

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1 answer

ursa · Accepted Answer · 2014-11-27T14:24:06+0000

Add the InitializingBean interface to your bean and check the property in it:

@Component
public class MyComponent implements InitializingBean {
    @Autowired
    private Environment env; // null

    @Autowired
    public MyComponent(ConfigurationUtils configUtils /* not null */) {
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        System.out.println("Initialized environment: " + env);
    }
}

The default Spring bean lifecycle is:

create object / call constructor with arguments (autowired?)
fill (autowired?) bean properties (fields and setters)
afterPropertiesSet call (if bean implements InitializingBean)
post link to bean
...
link to link bean
call destroy (if bean implements DisposableBean)

Autowired field is null, but not on constructor auto-provisioning

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