interceptor

在进行软件开发过程中总会遇到一些公用代码需要被提取出来，这个时候代理是一个好的解决方案，Mybatis也借助JDK代理实现了一套拦截器机制，可以在被拦截的方法前后加入通用逻辑，并通过@Intercepts和@Signature注解指定需要被代理的接口和方法。 一、实例 场景：需要在插入或修改数据库时动态加入修改时间和修改人，并记录下执行数据库操作花费时间。 1. 实现自定义拦截器 @Intercepts({@Signature(type=Executor.class, method="update", args={MappedStatement.class, Object.class})}) public class MyTestInterceptor implements Interceptor { public Object intercept(Invocation invocation) throws Throwable { Object arg = invocation.getArgs()[1]; if(arg instanceof BaseBean) { BaseBean bean = (BaseBean) arg; bean.setUpdatetime(System.currentTimeMillis()); bean.setUpdator("login user");

使用的版本是Springsecurity的4.2.x版本。 业务场景是这样的，系统中存在很多用户，超级管理员要有个功能，就是可以切换用户，比如超级管理员，可以切换为系统中的任何一个用户。Spingsecurity提供了一个SwitchUserFilter，我们就用这个来实现功能。 １、先来看怎么使用 List-1.1 <bean id="switchUserFilter" class="org.springframework.security.web.authentication.switchuser.SwitchUserFilter"> <property name="userDetailsService" ref="userService"/> <property name="usernameParameter" value="userNo"/> <property name="switchUserUrl" value="/switch/user"/> </bean> 定义switchUserFilter这个bean，如下List-1所示。用过Springsecurity的，应该知道UserDetailsService，这里就不再细讲。 usernameParameter的值是userNo，会从HttpServletRequest中获取key为userNo的值

I have several bundles (A, B, and C) deployed to an OSGi container, each containing a CamelContext and some routes. I have another bundle (M) with a CamelContext with a route (for collecting monitoring data) and a InterceptStrategy bean. I would like the InterceptStrategy bean from M to automatically apply to all of the other CamelContext s in the container (i.e., those in A, B, and C), without having to modify the other bundles. Ultimately, the goal is to wiretap data from each CamelContext into the route in M, without having to make any changes to A, B, or C to explicitly route the Exchange

I am reading some tutorials regarding Interceptors in java ee, but there are some themes which are not covered extensively. Therefore I would be greatful to anyone having answers to the following questions: 1) In which order are Interceptors execueted in case the target class contains an @AroundInvoke method as: @Interceptors({PrimaryInterceptor.class, SecondaryInterceptor.class}) @Stateful public class OrderBean { ... @AroundInvoke private void last(InvocationContext ctx) { ... } ... } I have the impression that first it is excecuted the taget class Interceptor, namely the last method in the

I'm developing an app using Retrofit 2 to request to API. This API is in ASP.NET and it is zipping with GZip and encoding to Base64, like the code below: private static string Compress(string conteudo) { Encoding encoding = Encoding.UTF8; byte[] raw = encoding.GetBytes(conteudo); using (var memory = new MemoryStream()) { using (GZipStream gzip = new GZipStream(memory, CompressionMode.Compress, true)) { gzip.Write(raw, 0, raw.Length); } return Convert.ToBase64String(memory.ToArray()); } } private static string Decompress(string conteudo) { Encoding encoding = Encoding.UTF8; var gzip = Convert

在学spring3 mvc，做了个简单的CRUD，但是用户不登录也能直接访问任何页面。我的想法是写个SecurityInterceptor在preHandle中判断session是不是存在user对象。配置如下： <mvc:interceptors> <mvc:interceptor> <mvc:mapping path="/*" /> <bean class="smartcrud.common.spring.SecurityInterceptor"> </bean> </mvc:interceptor> </mvc:interceptors> 代码如下： public class SecurityInterceptor implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { // intercept HttpSession session = request.getSession(); if (session.getAttribute("user") == null) { throw new

I'm extending hibernate.EmptyInterceptor and in my implementation I would like to have autowired to some services but they return null. I added a @Component annotation over the class. My code: <property name="jpaPropertyMap"> <map> <entry key="javax.persistence.transactionType" value="JTA" /> <entry key="hibernate.current_session_context_class" value="jta" /> <entry key="hibernate.transaction.manager_lookup_class" value="com.atomikos.icatch.jta.hibernate3.TransactionManagerLookup" /> <entry key="hibernate.connection.autocommit" value="false" /> <entry key="hibernate.ejb.interceptor" value="com