配置动作链

动作链,很强大,但之前很少解释,导致很少人用到.

在conf文件夹中,新建一个文件夹mvc,新增一个配置文件叫nutzbook-mvc-chain.js, 内容如下

var chain={
    "default" : {
        "ps" : [
              "net.wendal.nutzbook.mvc.LogTimeProcessor",
              "org.nutz.mvc.impl.processor.UpdateRequestAttributesProcessor",
              "org.nutz.mvc.impl.processor.EncodingProcessor",
              "org.nutz.mvc.impl.processor.ModuleProcessor",
              "org.nutz.mvc.impl.processor.ActionFiltersProcessor",
              "org.nutz.mvc.impl.processor.AdaptorProcessor",
              "org.nutz.mvc.impl.processor.MethodInvokeProcessor",
              "org.nutz.mvc.impl.processor.ViewProcessor"
              ],
        "error" : 'org.nutz.mvc.impl.processor.FailProcessor'
    }
};

这个动作链配置文件,与nutz默认的配置文件,仅仅多了一行 net.wendal.nutzbook.mvc.LogTimeProcessor

所以,新建一个类叫LogTimeProcessor, 包自然就是net.wendal.nutzbook.mvc咯, 继承org.nutz.mvc.impl.processor.AbstractProcessor

package net.wendal.nutzbook.mvc;

import javax.servlet.http.HttpServletRequest;

import org.nutz.lang.Stopwatch;
import org.nutz.log.Log;
import org.nutz.log.Logs;
import org.nutz.mvc.ActionContext;
import org.nutz.mvc.impl.processor.AbstractProcessor;

public class LogTimeProcessor extends AbstractProcessor {

    private static final Log log = Logs.get();

    public LogTimeProcessor() {
    }

    @Override
    public void process(ActionContext ac) throws Throwable {
        Stopwatch sw = Stopwatch.begin();
        try {
            doNext(ac);
        } finally {
            sw.stop();
            if (log.isDebugEnabled()) {
                HttpServletRequest req = ac.getRequest();
                log.debugf("[%4s]URI=%s %sms", req.getMethod(), req.getRequestURI(), sw.getDuration());
            }
        }
    }

}

然后打开MainModule这个类,加入一个注解

@ChainBy(args="mvc/nutzbook-mvc-chain.js")

启动tomcat并登陆登出,可以看到有类似的log输出

2015-04-09 19:46:59,140 net.wendal.nutzbook.mvc.LogTimeProcessor.process(LogTimeProcessor.java:27) DEBUG - [POST]URI=/nutzbook/user/login 30ms

这个类的主要目的是演示动作链的配置, 因为druid的监控页面有更详尽的统计数据了(以前可没有druid,呵呵)