我是Groovy和Grails(以及Java)的新手,我有一个Quartz调度程序工作(下面的代码),想知道
1.)如何在第一次调用作业时(或在应用程序启动时,例如在另一个文件中)执行一些初始化(检查数据库并初始化局部变量),但是如何在此作业中设置计数器变量?
2.)变量是否在调用作业之间保持其值?如果没有,我该怎么做?
class MyJob {
static triggers = {
simple repeatInterval: 1000l // execute job every 1 second
}
// These need to be initiated (with values from a DB) the first time the job is run:
long myCounter1, myCounter2, myCounter3
def execute() {
if(first time job is run / application startup) {
// get values for counters defined above, from DB
}
// else values should persist from last job run
// Get stuff from database, passing in counter values
}
我正在使用Grails https://grails-plugins.github.io/grails-quartz/guide/introduction.html的Quartz插件,它使用Quartz Scheduler http://www.quartz-scheduler.org/documentation/2.4.0-SNAPSHOT/quick-start-guide.html
谢谢
使用@PersistJobDataAfterExecution
注释您的工作,并使用JobDataMap在执行之间存储/检索数据。
import org.quartz.*;
@PersistJobDataAfterExecution
public class ExampleJob {
static triggers = {
simple repeatInterval: 1000l // execute job every 1 second
}
@Override
void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
JobDataMap jobDataMap = jobExecutionContext.jobDetails.jobDataMap
Integer count = jobDataMap.get("count") ?: 0
jobDataMap.put("count", ++count)
}
}