定时任务管理(二)velocity和groovy构成灵活的展现层

定时任务管理(二)velocity和groovy构成灵活的展现层 最近项目采用了groovy来做为我们的控制层，通过配置，能将groovy文件从项目的war包中分离出来，放置在一个特定的目录，这样，我们根据groovy解释语言的特性，可以在不修改任何war包服务的情况下，对groovy的controller进行修改。如果还是使用jsp文件，那么灵活性就大大折扣了，所以这里我们修改JSP，用velocity来替换之。 velocity在2004年的时候，我就开始在淘宝项目中使用，一直使用了2年左右的时间，一直觉得很好用。哈哈。这次终于有机会重新应用一下了，先给eclipse安装好插件 velocity首页 http://velocity.apache.org/ velocity的eclipse插件地址 http://propsorter.sourceforge.net/veloeclipse/ 我在eclipse3.5下安装，最先报出提示信息如下： There are no categorized items?? 安装不上 网上搜索了下，去掉了下面的勾 Group items by category就好了：） groovy的应用 这个以前就专门写过BLOG，这里基本上也没有怎么改动 http://hi.baidu.com/luohuazju/blog/item/37db387719ceae11b151b959.html http://hi.baidu.com/luohuazju/blog/item/0d02982367884b4493580759.html 核心配置文件core-context.xml： <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:lang="http://www.springframework.org/schema/lang" xmlns:groovy="http://www.sillycat.com/schema/groovy" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.sillycat.com/schema/groovy http://www.sillycat.com/schema/groovy/groovy.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd"> <context:component-scan base-package="cn.sccl" /> <!-- 属性文件读入 --> <bean id="propertyConfigurer" ?? class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> ?? <property name="locations"> ??? <list> ???? <value>classpath:config.properties</value> ??? </list> ?? </property> </bean> <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/> <bean id="handlerAdapter" class="com.sillycat.easygroovyplugin.servlet.proxy.ProxyAwareAnnotationMethodHandlerAdapter" /> <lang:defaults refresh-check-delay="5" /> <!-- file://D:/work/easygroovy/groovy/*.groovy --> <groovy:scan source-pattern="/groovy/*.groovy" /> </beans> 比较关键的是这个com.sillycat.easygroovyplugin.servlet.proxy.ProxyAwareAnnotationMethodHandlerAdapter，我做的扩展，这个是用到的easygroovyplugin项目中的东东，同时会默认装载easygroovy.properties文件如下： ############################################### # groovy configuration ############################################### groovy.file.path=file://D:/project/CPMIS-Core/Code/Trunk/tasksupervisor 这样就做到了groovy文件可以指向任意的路径，而不需要打在war包中 其中一个JobController.groovy文件如下： package cn.sccl.tasksupervisor.web; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.bind.annotation.RequestMethod; import cn.sccl.tasksupervisor.commons.utils.StringUtil; import java.net.URLDecoder; import cn.sccl.tasksupervisor.service.SchedulerService; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @Controller @RequestMapping("/job.do") class JobController { @Autowired SchedulerService schedulerService; @RequestMapping(params = "method=list") public ModelAndView list() throws IOException { ?? ModelAndView view = new ModelAndView("jobList"); ?? List<Map<String,Object>> jobs = schedulerService.getQrtzJobs(); ?? view.addObject("items",jobs); ?? return view; } @RequestMapping(params = "method=edit") public ModelAndView edit() throws IOException { ?? ModelAndView view = new ModelAndView("jobEdit"); ?? return view; } @RequestMapping(params = "method=save") public ModelAndView save(HttpServletRequest request,??? HttpServletResponse response) throws IOException { ?? ModelAndView view = new ModelAndView("redirect:job.do?method=list"); ?? String jobName = request.getParameter("jobName"); ?? String jobTaskName = request.getParameter("jobTaskName"); ?? String jobType = request.getParameter("jobType"); ?? String relateBeanNames = request.getParameter("relateBeanNames"); ? ?? if(StringUtil.isNotBlank(jobType)){ ??? if("spring".equals(jobType)){ ???? Map paras = null; ???? if(StringUtil.isNotBlank(relateBeanNames)){ ????? paras = new HashMap<String,Object>(); ????? paras.put("RELATE_BEANS",relateBeanNames); ???? } ???? schedulerService.addSpringJob(jobName,null,jobTaskName,paras); ??? }else if("java".equals(jobType)){ ???? schedulerService.addJob(jobName,null); ??? } ?? } ?? return view; } @RequestMapping(params = "method=cmd") public void cmd(HttpServletRequest request,HttpServletResponse response) throws IOException { ?? String action = request.getParameter("action"); ?? String jobName = request.getParameter("jobName"); ?? if(StringUtil.isNotBlank(action) && StringUtil.isNotBlank(jobName)){ ??? jobName = URLDecoder.decode(jobName,"UTF-8"); ??? if("pause".equals(action)){ ???? //暂停任务 ???? schedulerService.pauseJob(jobName,null); ???? response.getWriter().println(0); ??? }else if("resume".equals(action)){ ???? //重启任务 ???? schedulerService.resumeJob(jobName,null); ???? response.getWriter().println(0); ??? }else if("remove".equals(action)){ ???? //删除任务 ???? schedulerService.removeJob(jobName,null); ???? response.getWriter().println(0); ??? } ?? } } } velocity的灵活布局 布局上参考了以前一个北京同事的BLOG，呵呵http://qieqie.iteye.com/blog/65028 核心配置文件也在这个core-context.xml里面： <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:lang="http://www.springframework.org/schema/lang" xmlns:groovy="http://www.sillycat.com/schema/groovy" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.sillycat.com/schema/groovy http://www.sillycat.com/schema/groovy/groovy.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd"> <context:component-scan base-package="cn.sccl" /> <!-- 属性文件读入 --> <bean id="propertyConfigurer" ?? class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> ?? <property name="locations"> ??? <list> ???? <value>classpath:config.properties</value> ??? </list> ?? </property> </bean> <bean id="velocityConfig" ?? class="org.springframework.web.servlet.view.velocity.VelocityConfigurer"> ?? <property name="resourceLoaderPath" value="${velocity.file.path}/template/" /> ?? <property name="velocityProperties"> ??? <props> ???? <prop key="input.encoding">UTF-8</prop> ???? <prop key="output.encoding">UTF-8</prop> ???? <prop key="contentType">text/html;charset=UTF-8</prop> ??? </props> ?? </property> </bean> ??? <bean id="velocityViewResolver" ?????? class="org.springframework.web.servlet.view.velocity.VelocityLayoutViewResolver"> ??? <property name="layoutUrl" value="layout/layout.vm"/> ??? <property name="cache" value="false" /> ?? <property name="suffix" value=".vm" /> ?? <property name="exposeSpringMacroHelpers" value="true" /> ?? <property name="contentType" value="text/html;charset=UTF-8" /> ??? </bean> </beans> 默认的velocity的路径指向了config.properties里面配置的： ################################################ # velocity path ################################################ velocity.file.path=file://D:/project/CPMIS-Core/Code/Trunk/tasksupervisor 这样，就做到了velocity页面文件也和war分开了。也就是说，我平时改页面，改controller层代码，其实我都不需要重新发布war包，只要改了文件上传就行了。 另外我的velocity layout布局是怎么回事呢，看看以下几个文件就明白了： /template/layout/layout.vm <html>?? ??? <head>?? ?????? <title>任务调度系统</title> ??? </head>?? ??? <body>?? ??????? <div id="header">#parse('common/header.vm')</div>?? ??????? <div id="content">?? ??????????? <div id="sub">#parse($sub)</div>?? ??????????? <div id="main">$screen_content</div>?? ??????? </div> ??????? <div id="footer">#parse('common/footer.vm')</div>?? ??? </body>?? </html> /template/common/header.vm header is here! /template/common/footer.vm footer is here! /template/common/menu.vm <a href="job.do?method=edit">新增任务</a>&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp; <a href="trigger.do?method=edit">新增调度</a>&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp; <a href="job.do?method=list">任务管理</a>&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp; <a href="trigger.do?method=list">调度管理</a>&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp;<br /> 当访问我的真实页面/template/jobEdit.vm的时候，会在jobEdit.vm里面设置，我要调用哪个layout，哪个sub元素，其实以前在淘宝用的webx框架就和这个很类似，访问一个页面就去找对应文件夹的layout，可能就是从这里得到灵感出来的。 #set($layout = "layout/layout_edit.vm")?? #set($sub= "common/menu.vm") <h1>新增任务</h1> ....省略 完成以上功能后，发现，整个项目的velocity展现层+groovy控制层都比较灵活了，同时又有很灵活的layout布局，把很多页面单元可以抽取成各个小模块，放置到commons里面以供调用，修改velocity文件和groovy文件也不用重启服务，很方便。