Spring boot 无法自动连接JobLauncher,始终返回null
我尝试将每个作业链接到一个线程,以便可以使用不同的cron值同时启动多个作业,但jobLauncher始终为null 我试图在Configuation类中将jobLauncher创建为一个bean,但它从未起作用Spring boot 无法自动连接JobLauncher,始终返回null,spring-boot,spring-batch,job-scheduling,Spring Boot,Spring Batch,Job Scheduling,我尝试将每个作业链接到一个线程,以便可以使用不同的cron值同时启动多个作业,但jobLauncher始终为null 我试图在Configuation类中将jobLauncher创建为一个bean,但它从未起作用 @Component public class MyTask extends Thread { @Autowired private ApplicationContext context; @Autowired private JobLauncher job
@Component
public class MyTask extends Thread {
@Autowired
private ApplicationContext context;
@Autowired
private JobLauncher jobLauncher;
@Autowired
private Batchconfig config;
public void run() {
Jobs job = Scheduler.listLinked.get(this);
if (job != null && job.isState()) {
JobParameters jobParameters = new JobParametersBuilder().addLong("time", System.currentTimeMillis())
.addString("param", job.getParam()).toJobParameters();
try {
JobExecution jobExecution = jobLauncher.run(config.execute(job.getName()), jobParameters);
System.out.println("Job's Status:::" + jobExecution.getStatus());
} catch (JobExecutionAlreadyRunningException | JobRestartException | JobInstanceAlreadyCompleteException
| JobParametersInvalidException e) {
e.printStackTrace();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
@Component
public class Scheduler implements SchedulingConfigurer {
@Override
public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
set();
for (Jobs j : list) {
MyTask th = new MyTask();
listLinkedInverse.put(j, th);
listLinked.put(th, j);
taskRegistrar.addCronTask(th, j.getCron());
}
}
}
例外情况:
java.lang.NullPointerException
at com.generator.config.batch.scheduler.MyTask.run(MyTask.java:39)
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:93)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
MyTask
实例是手动创建的(在MyTask th=new MyTask()
中),而不是由Spring创建的,因此不会执行依赖项注入,并且自动连线的JobLauncher
将为空
您需要创建一个类型为MyTask
(以便正确注入其依赖项)的bean,然后将其作为协作者注入到调度程序
类中
作为旁注,这不是同时启动多个作业的理想方式。您正在为每个线程创建一个JobLauncher
,默认情况下,它反过来使用一个SyncTaskExecutor
。您可以做的是创建一个JobLauncher
,并使用线程池对其进行配置,以同时启动作业,例如:
@Bean
public JobLauncher jobLauncher() {
SimpleJobLauncher jobLauncher = new SimpleJobLauncher();
jobLauncher.setJobRepository(jobRepository());
jobLauncher.setTaskExecutor(new SimpleAsyncTaskExecutor()); // or use ThreadPoolTaskExecutor
jobLauncher.afterPropertiesSet();
return jobLauncher;
}
您可以在参考文档的一节中找到更多详细信息。我尝试了这个解决方案,它成功了
@Component
public class Scheduler {
@Autowired
private ApplicationContext context;
@Autowired
public static JobLauncher jobLauncher;
@Autowired
public static Batchconfig config;
@Autowired
private JobService jobService;
private final ScheduledExecutorService scheduler =
Executors.newScheduledThreadPool(1);
public static Map<ScheduledFuture<Jobs>, Jobs> listLinked = new HashMap<>();
public static Map<Jobs, ScheduledFuture<Jobs>> listLinkedInverse = new HashMap<>();
List<Jobs> list;
@PostConstruct
public void init() {
list = jobService.findAll();
for (Jobs j : list) {
if(j.isState()) {
MyTask th = new MyTask(j);
context.getAutowireCapableBeanFactory().autowireBean(th);
ScheduledFuture<Jobs> jobHandler = (ScheduledFuture<Jobs>) scheduler.scheduleAtFixedRate(th, 0, 2, TimeUnit.SECONDS);
listLinkedInverse.put(j, jobHandler);
listLinked.put(jobHandler, j);
}
}
}
public void launchJob(Jobs myJob){
MyTask th = new MyTask(myJob);
context.getAutowireCapableBeanFactory().autowireBean(th);
ScheduledFuture<Jobs> jobHandler = (ScheduledFuture<Jobs>) scheduler.scheduleAtFixedRate(th, 0, 2, TimeUnit.SECONDS);
listLinkedInverse.put(myJob, jobHandler);
listLinked.put(jobHandler, myJob);
}
public void cancelJob(Jobs j) {
listLinkedInverse.get(j).cancel(true);
listLinked.remove(listLinkedInverse.get(j));
listLinkedInverse.remove(j);
}
}
@Component
public class MyTask extends Thread {
@Autowired
private JobLauncher jobLauncher;
private Jobs job;
@Autowired
private Batchconfig config;
public MyTask() {
}
public MyTask(Jobs job) {
this.job = job;
}
public void run() {
JobParameters jobParameters = new JobParametersBuilder().addLong("time", System.currentTimeMillis())
.addString("param", job.getParam()).toJobParameters();
try {
JobExecution jobExecution = jobLauncher.run(config.execute(job.getName()), jobParameters);
System.out.println("Job's Status:::" + jobExecution.getStatus());
} catch (JobExecutionAlreadyRunningException | JobRestartException | JobInstanceAlreadyCompleteException
| JobParametersInvalidException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}
@组件
公共类调度程序{
@自动连线
私有应用程序上下文上下文;
@自动连线
公共静态JobLauncher JobLauncher;
@自动连线
公共静态批处理配置;
@自动连线
私人就业服务;
专用最终计划执行器服务计划程序=
Executors.newScheduledThreadPool(1);
public static Map listLinked=new HashMap();
公共静态映射listLinkedInverse=新HashMap();
名单;
@施工后
公共void init(){
list=jobService.findAll();
工作(j:列表){
if(j.isState()){
MyTask th=新的MyTask(j);
getAutowireCapableBeanFactory().autowireBean(th);
ScheduledFuture jobHandler=(ScheduledFuture)scheduler.scheduleAtFixedRate(th,0,2,TimeUnit.SECONDS);
listLinkedInverse.put(j,jobHandler);
listLinked.put(jobHandler,j);
}
}
}
public void launchJob(Jobs myJob){
MyTask th=新的MyTask(myJob);
getAutowireCapableBeanFactory().autowireBean(th);
ScheduledFuture jobHandler=(ScheduledFuture)scheduler.scheduleAtFixedRate(th,0,2,TimeUnit.SECONDS);
listLinkedInverse.put(myJob,jobHandler);
put(jobHandler,myJob);
}
公共职务(职务j){
listLinkedInverse.get(j).cancel(true);
移除(listLinkedInverse.get(j));
删除(j);
}
}
@组成部分
公共类MyTask扩展了线程{
@自动连线
私有JobLauncher JobLauncher;
私人工作;
@自动连线
私有批处理配置;
公共MyTask(){
}
公共MyTask(作业){
这个工作=工作;
}
公开募捐{
JobParameters JobParameters=新的JobParametersBuilder().addLong(“时间”,System.currentTimeMillis())
.addString(“param”,job.getParam()).toJobParameters();
试一试{
JobExecution JobExecution=jobLauncher.run(config.execute(job.getName()),jobParameters);
System.out.println(“作业状态::”+jobExecution.getStatus());
}捕获(JobExecutionAlreadyRunningException | JobRestartException | JobInstanceAlreadyCompleteException
|作业参数有效性异常(e){
e、 printStackTrace();
}捕获(例外e){
e、 printStackTrace();
}
}
}
是否定义了JobLauncher bean?是的,我尝试了,但仍然返回null。我尝试了此解决方案,但在配置TransactionManager时遇到问题。