title: Spring Security Java Config
body: <p>I'm trying to use JavaConfig instead of XML configuration for Spring Security.
  I would like to use <code>@PreAuthorization</code> for declaring access rights.</p>
  
  <p>My Spring Security Config looks like this:</p>
  
  <pre><code>@Configuration
  @EnableWebSecurity
  @EnableGlobalMethodSecurity( prePostEnabled = true )
  public class SecurityConfig extends WebSecurityConfigurerAdapter {
  
      @Override
      protected void registerAuthentication( AuthenticationManagerBuilder auth ) throws Exception {
          auth
              .inMemoryAuthentication()
              .withUser( "user" ).password( "password" ).roles( "USER" );
      }
  }
  </code></pre>
  
  <p>However, this doesn't work. Once I deploy my web application I receive an error <code>Error creating bean with name 'methodSecurityInterceptor' defined in class path resource</code>.</p>
  
  <p>After some research I found out that I have to add the <code>aopalliance</code> library to my project. Unfortunately that didn't resolved my problem.</p>
  
  <p>Here is the complete stack trace:</p>
  
  <pre><code>org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'methodSecurityInterceptor' defined in class path resource [org/springframework/security/config/annotation/method/configuration/GlobalMethodSecurityConfiguration.class]: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.aopalliance.intercept.MethodInterceptor org.springframework.security.config.annotation.method.configuration.GlobalMethodSecurityConfiguration.methodSecurityInterceptor() throws java.lang.Exception] threw exception; nested exception is java.lang.IllegalArgumentException: Expecting to only find a single bean for type interface org.springframework.security.authentication.AuthenticationManager, but found []
      at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:592)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1094)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:989)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
      at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
      at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
      at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
      at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
      at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700)
      at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
      at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
      at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:381)
      at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:293)
      at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
      at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4937)
      at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
      at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
      at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
      at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1558)
      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 org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301)
      at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
      at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
      at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:620)
      at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:567)
      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 org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301)
      at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
      at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
      at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1487)
      at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:97)
      at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1328)
      at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1420)
      at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:848)
      at sun.reflect.GeneratedMethodAccessor42.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:606)
      at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:322)
      at sun.rmi.transport.Transport$1.run(Transport.java:177)
      at sun.rmi.transport.Transport$1.run(Transport.java:174)
      at java.security.AccessController.doPrivileged(Native Method)
      at sun.rmi.transport.Transport.serviceCall(Transport.java:173)
      at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:556)
      at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:811)
      at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:670)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
      at java.lang.Thread.run(Thread.java:744)
  Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.aopalliance.intercept.MethodInterceptor org.springframework.security.config.annotation.method.configuration.GlobalMethodSecurityConfiguration.methodSecurityInterceptor() throws java.lang.Exception] threw exception; nested exception is java.lang.IllegalArgumentException: Expecting to only find a single bean for type interface org.springframework.security.authentication.AuthenticationManager, but found []
      at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:188)
      at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:581)
      ... 56 more
  Caused by: java.lang.IllegalArgumentException: Expecting to only find a single bean for type interface org.springframework.security.authentication.AuthenticationManager, but found []
      at org.springframework.util.Assert.isTrue(Assert.java:65)
      at org.springframework.security.config.annotation.method.configuration.GlobalMethodSecurityConfiguration.lazyBean(GlobalMethodSecurityConfiguration.java:352)
      at org.springframework.security.config.annotation.method.configuration.GlobalMethodSecurityConfiguration.authenticationManager(GlobalMethodSecurityConfiguration.java:240)
      at org.springframework.security.config.annotation.method.configuration.GlobalMethodSecurityConfiguration.methodSecurityInterceptor(GlobalMethodSecurityConfiguration.java:116)
      at org.springframework.security.config.annotation.method.configuration.GlobalMethodSecurityConfiguration$$EnhancerByCGLIB$$890899ea.CGLIB$methodSecurityInterceptor$2(&lt;generated&gt;)
      at org.springframework.security.config.annotation.method.configuration.GlobalMethodSecurityConfiguration$$EnhancerByCGLIB$$890899ea$$FastClassByCGLIB$$fba343c4.invoke(&lt;generated&gt;)
      at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
      at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:326)
      at org.springframework.security.config.annotation.method.configuration.GlobalMethodSecurityConfiguration$$EnhancerByCGLIB$$890899ea.methodSecurityInterceptor(&lt;generated&gt;)
      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 org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:166)
      ... 57 more
  </code></pre>