Appfuse：记录操作日志

appfuse的数据维护操作都发生在***form页面，与之对应的是***FormController，在Controller中处理数据的操作是onSubmit方法，既然所有的操作都通过onSubmit，那么只需要拦截onSubmit并记录对应的参数即可作为操作日志。

首先要拦截Controller层的方法就需要在dispatcher-servlet.xml中配置拦截器，如下：

<aop:config>
        <aop:advisor id="submitTx" advice-ref="txSubmitAdvice"
            pointcut="execution(* *..controller.*Controller.onSubmit(..))" order="0" />
    </aop:config>
    <bean id="txSubmitAdvice" class="com.zcmp.xunji.service.SubmitAdvice"/>

dispatcher-servlet.xml

接下来在Service中定义自己的AOP拦截器

package com.disappearwind.service;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.aop.AfterReturningAdvice;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContext;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;

import com.disappearwind.model.BaseObject;
import com.disappearwind.model.Role;
import com.disappearwind.model.Syslog;
import com.disappearwind.model.User;

import java.lang.reflect.Method;
import java.util.Date;
import java.util.Set;

import javax.servlet.http.HttpServletRequest;

/**
 * 对Controller中的onSubmit方法监听，记录用户的操作日志
 *
 * @author mraible
 */
public class SubmitAdvice implements AfterReturningAdvice, MethodInterceptor {

    private final Log log = LogFactory.getLog(SubmitAdvice.class);
    private UserManager userManager = null;
    private GenericManager<Syslog, Long> syslogManager;

    @Autowired
    public void setSyslogManager(
            @Qualifier("syslogManager") GenericManager<Syslog, Long> syslogManager) {
        this.syslogManager = syslogManager;
    }

    @Autowired
    public void setUserManager(UserManager userManager) {
        this.userManager = userManager;
    }

    /**
     * 在用户的业务操作执行完之后记录操作日志
     *
     * @param returnValue
     *            the user object
     * @param method
     *            the name of the method executed
     * @param args
     *            the arguments to the method
     * @param target
     *            the target class
     * @throws Throwable
     *             thrown when args[0] is null or not a Base object
     */
    public void afterReturning(Object returnValue, Method method,
            Object[] args, Object target) throws Throwable {
        // 方法签名：String onSubmit(AppToken appToken, BindingResult errors,
        // HttpServletRequest request,HttpServletResponse response)
        try {
            if (args[0] instanceof BaseObject) {
                BaseObject obj = (BaseObject) args[0];
                HttpServletRequest request = (HttpServletRequest) args[2];
                // 发生在哪个Model
                String modelName = obj.getClass().getSimpleName();
                // Model中的数据
                String modelData = obj.toString();
                // 操作类型，request参数中sava就是Save，request参数中有delete则是Delete
                String action = "Save";
                if (null != request.getParameter("delete")) {
                    action = "Delete";
                }

                // 记录操作日志到数据库
                Syslog syslog = new Syslog();
                syslog.setModule(modelName + "." + action);
                syslog.setContent(modelData);
                syslog.setCreateDate(new Date());
                syslog.setCreator(getCurrentUserID());

                syslogManager.save(syslog);
            }
        } catch (Exception ex) {
            log.error(ex);
        }
    }

    /**
     * 获取当前操作的用户
     *
     * @return 用户ID
     */
    private Long getCurrentUserID() {
        Long userID = 0l;
        SecurityContext ctx = SecurityContextHolder.getContext();
        if (ctx.getAuthentication() != null) {
            Authentication auth = ctx.getAuthentication();
            UserDetails user = (UserDetails) auth.getPrincipal();
            userID = this.userManager.getUserByUsername(user.getUsername())
                    .getId();
        }
        return userID;
    }
}

SubmitAdvice

注意，其中有一段是获取当前登录用户的ID的getCurrentUserID。

Syslog是自己定义的存储日志的数据结构。