xxl-job: v2.0.2 原理 目录学习
- 0. xxl-job原理
- 1. xxl-job原理---定时任务架构
- 2. xxl-job原理-- 调度中心
- 3. xxl-job原理-- 执行器注册
- 4. xxl-job原理-- 执行器注册问题
- 5 xxl-job原理-- 执行器注册问题
- 6. xxl-job 原理-- 调度中心注册
- 7. xxl-job 原理-- 任务管理
- 8. xxl-job 原理-- 任务执行或触发
- 9. xxl-job原理-- jobthread的作用
- 10. xxl-job原理---回调
在任务调度中心可以进行新建任务，新建任务之后可以在任务列表中查看相关任务，任务可以根据我们配置的cron表达式进行任务调度，或者也可以在任务列表中执行、暂停、删除和查看相关运行日志等操作。
1. 任务新建
在任务管理界面，新增任务
1
2. 任务操作
2
3. 任务操作的API
- 任务管理界面
JobInfoController的 index方法
// @RequestMapping("/jobinfo") 默认接口
@RequestMapping
public String index(HttpServletRequest request, Model model, @RequestParam(required = false, defaultValue = "-1") int jobGroup) {
// 枚举-字典
model.addAttribute("ExecutorRouteStrategyEnum", ExecutorRouteStrategyEnum.values()); // 路由策略-列表
model.addAttribute("GlueTypeEnum", GlueTypeEnum.values()); // Glue类型-字典
model.addAttribute("ExecutorBlockStrategyEnum", ExecutorBlockStrategyEnum.values()); // 阻塞处理策略-字典
// 执行器列表
List<XxlJobGroup> jobGroupList_all = xxlJobGroupDao.findAll();
// filter group
List<XxlJobGroup> jobGroupList = filterJobGroupByRole(request, jobGroupList_all);
if (jobGroupList==null || jobGroupList.size()==0) {
throw new XxlJobException(I18nUtil.getString("jobgroup_empty"));
}
model.addAttribute("JobGroupList", jobGroupList);
model.addAttribute("jobGroup", jobGroup);
return "jobinfo/jobinfo.index";
}
- 任务新增
JobInfoController.add
@RequestMapping("/add")
@ResponseBody
public ReturnT<String> add(XxlJobInfo jobInfo) {
return xxlJobService.add(jobInfo);
}
XxlJobServiceImpl
在service 中，需要验证界面输入信息， valid, fix \r in shell , childJobId valid
最后存储到xxl_job_info 表中
XxlJobServiceImpl
@Override
public ReturnT<String> add(XxlJobInfo jobInfo) {
// valid 验证基本的信息
......
// fix "\r" in shell
if (GlueTypeEnum.GLUE_SHELL==GlueTypeEnum.match(jobInfo.getGlueType()) && jobInfo.getGlueSource()!=null) {
jobInfo.setGlueSource(jobInfo.getGlueSource().replaceAll("\r", ""));
}
// ChildJobId valid
if (jobInfo.getChildJobId()!=null && jobInfo.getChildJobId().trim().length()>0) {
String[] childJobIds = jobInfo.getChildJobId().split(",");
for (String childJobIdItem: childJobIds) {
if (childJobIdItem!=null && childJobIdItem.trim().length()>0 && isNumeric(childJobIdItem)) {
XxlJobInfo childJobInfo = xxlJobInfoDao.loadById(Integer.valueOf(childJobIdItem));
if (childJobInfo==null) {
return new ReturnT<String>(ReturnT.FAIL_CODE,
MessageFormat.format((I18nUtil.getString("jobinfo_field_childJobId")+"({0})"+I18nUtil.getString("system_not_found")), childJobIdItem));
}
} ......
}
......
jobInfo.setChildJobId(temp);
}
// add in db
xxlJobInfoDao.save(jobInfo);
if (jobInfo.getId() < 1) {
return new ReturnT<String>(ReturnT.FAIL_CODE, (I18nUtil.getString("jobinfo_field_add")+I18nUtil.getString("system_fail")) );
}
return new ReturnT<String>(String.valueOf(jobInfo.getId()));
}
- 任务更新
JobInfoController.update
@RequestMapping("/update")
@ResponseBody
public ReturnT<String> update(XxlJobInfo jobInfo) {
return xxlJobService.update(jobInfo);
}
XxlJobServiceImpl
service 中， valid ， ChildJobId valid ， group valid, stage job info, next trigger time (10s后生效，避开预读周期),
@Override
public ReturnT<String> update(XxlJobInfo jobInfo) {
// valid
......
// ChildJobId valid
......
// group valid
XxlJobGroup jobGroup = xxlJobGroupDao.load(jobInfo.getJobGroup());
if (jobGroup == null) {
return new ReturnT<String>(ReturnT.FAIL_CODE, (I18nUtil.getString("jobinfo_field_jobgroup")+I18nUtil.getString("system_unvalid")) );
}
// stage job info
XxlJobInfo exists_jobInfo = xxlJobInfoDao.loadById(jobInfo.getId());
if (exists_jobInfo == null) {
return new ReturnT<String>(ReturnT.FAIL_CODE, (I18nUtil.getString("jobinfo_field_id")+I18nUtil.getString("system_not_found")) );
}
// next trigger time (10s后生效，避开预读周期)
long nextTriggerTime = exists_jobInfo.getTriggerNextTime();
if (exists_jobInfo.getTriggerStatus() == 1 && !jobInfo.getJobCron().equals(exists_jobInfo.getJobCron()) ) {
try {
nextTriggerTime = new CronExpression(jobInfo.getJobCron()).getNextValidTimeAfter(new Date(System.currentTimeMillis() + 10000)).getTime();
} catch (ParseException e) {
logger.error(e.getMessage(), e);
return new ReturnT<String>(ReturnT.FAIL_CODE, I18nUtil.getString("jobinfo_field_cron_unvalid")+" | "+ e.getMessage());
}
}
exists_jobInfo.setJobGroup(jobInfo.getJobGroup());
exists_jobInfo.setJobCron(jobInfo.getJobCron());
exists_jobInfo.setJobDesc(jobInfo.getJobDesc());
exists_jobInfo.setAuthor(jobInfo.getAuthor());
exists_jobInfo.setAlarmEmail(jobInfo.getAlarmEmail());
exists_jobInfo.setExecutorRouteStrategy(jobInfo.getExecutorRouteStrategy());
exists_jobInfo.setExecutorHandler(jobInfo.getExecutorHandler());
exists_jobInfo.setExecutorParam(jobInfo.getExecutorParam());
exists_jobInfo.setExecutorBlockStrategy(jobInfo.getExecutorBlockStrategy());
exists_jobInfo.setExecutorTimeout(jobInfo.getExecutorTimeout());
exists_jobInfo.setExecutorFailRetryCount(jobInfo.getExecutorFailRetryCount());
exists_jobInfo.setChildJobId(jobInfo.getChildJobId());
exists_jobInfo.setTriggerNextTime(nextTriggerTime);
xxlJobInfoDao.update(exists_jobInfo);
return ReturnT.SUCCESS;
}
- 任务删除
JobInfoController.remove
@RequestMapping("/remove")
@ResponseBody
public ReturnT<String> remove(int id) {
return xxlJobService.remove(id);
}
XxlJobServiceImpl
service 中， 删除 xxl_job_info, xxl_job_log, xxl_job_log_glue 对应的信息
@Override
public ReturnT<String> remove(int id) {
XxlJobInfo xxlJobInfo = xxlJobInfoDao.loadById(id);
if (xxlJobInfo == null) {
return ReturnT.SUCCESS;
}
xxlJobInfoDao.delete(id);
xxlJobLogDao.delete(id);
xxlJobLogGlueDao.deleteByJobId(id);
return ReturnT.SUCCESS;
}
- 任务停止 其运行
JobInfoController.pause
@RequestMapping("/stop")
@ResponseBody
public ReturnT<String> pause(int id) {
return xxlJobService.stop(id);
}
XxlJobServiceImpl
service 中， 设置xxl_job_info的触犯时间为 0 ， 更新
@Override
public ReturnT<String> stop(int id) {
XxlJobInfo xxlJobInfo = xxlJobInfoDao.loadById(id);
xxlJobInfo.setTriggerStatus(0);
xxlJobInfo.setTriggerLastTime(0);
xxlJobInfo.setTriggerNextTime(0);
xxlJobInfoDao.update(xxlJobInfo);
return ReturnT.SUCCESS;
}
- 任务 运行 ，进行周期性执行
JobInfoController.start
@RequestMapping("/start")
@ResponseBody
public ReturnT<String> start(int id) {
return xxlJobService.start(id);
}
XxlJobServiceImpl
service 中， 设置xxl_job_info的触犯时间为 0 ， 更新
@Override
public ReturnT<String> start(int id) {
XxlJobInfo xxlJobInfo = xxlJobInfoDao.loadById(id);
// next trigger time (10s后生效，避开预读周期)
long nextTriggerTime = 0;
try {
nextTriggerTime = new CronExpression(xxlJobInfo.getJobCron()).getNextValidTimeAfter(new Date(System.currentTimeMillis() + 10000)).getTime();
} catch (ParseException e) {
logger.error(e.getMessage(), e);
return new ReturnT<String>(ReturnT.FAIL_CODE, I18nUtil.getString("jobinfo_field_cron_unvalid")+" | "+ e.getMessage());
}
xxlJobInfo.setTriggerStatus(1);
xxlJobInfo.setTriggerLastTime(0);
xxlJobInfo.setTriggerNextTime(nextTriggerTime);
xxlJobInfoDao.update(xxlJobInfo);
return ReturnT.SUCCESS;
}
- 任务触发， 执行一次
JobInfoController.triggerJob
@RequestMapping("/trigger")
@ResponseBody
//@PermissionLimit(limit = false)
public ReturnT<String> triggerJob(int id, String executorParam) {
// force cover job param
if (executorParam == null) {
executorParam = "";
}
// 利用jobtriggerPoolHelper类进行触发
JobTriggerPoolHelper.trigger(id, TriggerTypeEnum.MANUAL, -1, null, executorParam);
return ReturnT.SUCCESS;
}
PS: 若你觉得可以、还行、过得去、甚至不太差的话，可以“关注”一下，就此谢过!
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