1.Quartz Profile
Quartz is the core framework of the scheduler. Quartz scheduler is responsible for managing the application runtime environment. The scheduler is not doing all the work on their own, relying instead on some very important components in the framework. Quartz is not just a thread and thread management. To ensure scalability, Quartz-based architecture uses a multi-threaded. At startup, the initialization of a frame worker thread, this thread scheduler to perform a predetermined job. This is how Quartz can run multiple jobs concurrently principle. Quartz dependent member of a loosely coupled thread pool management thread to manage the environment.
2. project-related
The timer Demo used to compile the jar package under the regular implementation of the development path, can also be used for general task scheduling by deleting the query modification of the task to manage the entire list of files that can be turned on and off clearance begins to change jar execution state (after opening only if you need to stop or restart of the server shut down, concrete solutions are still improvement). related to a set of UI interface is simple, can second development, the integration of the main page of the JPA query You can view the relevant code section.
3. Test path
//主页路径:
http://localhost:9090/
//启动jar的路径(这里的我只是建了一个简单的springboot的helloword的Jar包,相关jar包在项目中可以找到)
http://localhost:8088/sayHello4. code associated
QuartzServiceImpl:
@Service
public class QuartzServiceImpl implements QuartzService {
@Autowired
private JobEntityRepository repository;
@Override
public JobEntity getById(int id) {
return repository.getById(id);
}
//通过Id获取Job
public JobEntity getJobEntityById(Integer id) {
return repository.getById(id);
}
//从数据库中加载获取到所有Job
public List<JobEntity> loadJobs() {
List<JobEntity> list = new ArrayList<>();
repository.findAll().forEach(list::add);
return list;
}
//获取JobDataMap.(Job参数对象)
public JobDataMap getJobDataMap(JobEntity job) {
JobDataMap map = new JobDataMap();
map.put("name", job.getName());
map.put("group", job.getGroup());
map.put("cronExpression", job.getCron());
map.put("parameter", job.getParameter());
map.put("JobDescription", job.getDescription());
map.put("vmParam", job.getVmParam());
map.put("jarPath", job.getJarPath());
map.put("status", job.getStatus());
return map;
}
//获取JobDetail,JobDetail是任务的定义,而Job是任务的执行逻辑,JobDetail里会引用一个Job Class来定义
public JobDetail geJobDetail(JobKey jobKey, String description, JobDataMap map) {
return JobBuilder.newJob(DynamicJob.class)
.withIdentity(jobKey)
.withDescription(description)
.setJobData(map)
.storeDurably()
.build();
}
//获取Trigger (Job的触发器,执行规则)
public Trigger getTrigger(JobEntity job) {
return TriggerBuilder.newTrigger()
.withIdentity(job.getName(), job.getGroup())
.withSchedule(CronScheduleBuilder.cronSchedule(job.getCron()))
.build();
}
//获取JobKey,包含Name和Group
public JobKey getJobKey(JobEntity job) {
return JobKey.jobKey(job.getName(), job.getGroup());
}
}DynamicJob:
/**
* :@DisallowConcurrentExecution : 此标记用在实现Job的类上面,意思是不允许并发执行.
* :注意org.quartz.threadPool.threadCount线程池中线程的数量至少要多个,否则@DisallowConcurrentExecution不生效
* :假如Job的设置时间间隔为3秒,但Job执行时间是5秒,设置@DisallowConcurrentExecution以后程序会等任务执行完毕以后再去执行,否则会在3秒时再启用新的线程执行
*/
@DisallowConcurrentExecution
@PersistJobDataAfterExecution //没有异常就更新数据 可用?
@Component
@Slf4j
public class DynamicJob implements Job {
private Logger logger = LoggerFactory.getLogger(DynamicJob.class);
/**
* 核心方法,Quartz Job真正的执行逻辑.
* executorContext JobExecutionContext中封装有Quartz运行所需要的所有信息
* @throws JobExecutionException execute()方法只允许抛出JobExecutionException异常
*/
@Override
public void execute(JobExecutionContext executionContext) throws JobExecutionException {
JobDataMap map = executionContext.getMergedJobDataMap();
String jarPath = map.getString("jarPath");
String parameter = map.getString("parameter");
String vmParam = map.getString("vmParam");
logger.info("Running Job name : {} ", map.getString("name"));
logger.info("Running Job description : " + map.getString("JobDescription"));
logger.info("Running Job group: {} ", map.getString("group"));
logger.info("Running Job cron : " + map.getString("cronExpression"));
logger.info("Running Job jar path : {} ", jarPath);
logger.info("Running Job parameter : {} ", parameter);
logger.info("Running Job vmParam : {} ", vmParam);
long startTime = System.currentTimeMillis();
if (!StringUtils.getStringUtil.isEmpty(jarPath)) {
File jar = new File(jarPath);
if (jar.exists()) {
ProcessBuilder processBuilder = new ProcessBuilder();
processBuilder.directory(jar.getParentFile());
/**
* 这个是java的执行命令
* java -jar
*/
List<String> commands = new ArrayList<>();
commands.add("java");
if (!StringUtils.getStringUtil.isEmpty(vmParam)) {
commands.add(vmParam);
}
commands.add("-jar");
commands.add(jarPath);
commands.add(" &");
System.out.println("commands->\n"+commands);
if (!StringUtils.getStringUtil.isEmpty(parameter)) {
commands.add(parameter);
processBuilder.command(commands);
logger.info("Running Job details as follows >>>>>>>>>>>>>>>>>>>>: ");
logger.info("Running Job commands : {} ", StringUtils.getStringUtil.getListString(commands));
try {
Process process = processBuilder.start();
logProcess(process.getInputStream(), process.getErrorStream());
} catch (Exception e) {
e.printStackTrace();
}
} else {
throw new JobExecutionException("Job Jar not found >> " + jarPath);
}
long endTime = System.currentTimeMillis();
logger.info(">>>>>>>>>>>>> Running Job has been completed , cost time : " + (endTime - startTime) + "ms\n");
}
}
}
//打印Job执行内容的日志
private void logProcess(InputStream inputStream, InputStream errorStream) throws IOException {
String inputLine;
String errorLine;
BufferedReader inputReader = new BufferedReader(new InputStreamReader(inputStream));
BufferedReader errorReader = new BufferedReader(new InputStreamReader(errorStream));
while ((inputLine = inputReader.readLine()) != null){
logger.info(inputLine);
}
while ((errorLine = errorReader.readLine()) != null) {
logger.error(errorLine);
}
}
}
5. Project git address
(Remember the point star like support for Oh, thank you!)