Spring Batch：在运行时获取已定义作业的列表

Question

是否可以在运行时在不使用db的情况下获取Spring Batch中已定义作业的列表？ 也许有可能从jobRepository bean或类似的对象获取这些元数据？

Answer 1

可以使用JobExplorer.getJobNames()检索所有作业名称的列表。

首先必须使用JobExplorerFactoryBean定义jobExplorer bean：

<bean id="jobExplorer" class="org.springframework.batch.core.explore.support.JobExplorerFactoryBean">
    <property name="dataSource" ref="dataSource"/>
</bean>

然后你可以在需要时注入这个bean。

Answer 2

获取配置为bean的作业名列表的替代策略可以使用ListableJobLocator。

@Autowired
ListableJobLocator jobLocator;

....

jobLocator.getJobNames();

这不需要作业存储库。

Answer 3

我使用这些代码列出并执行作业

private String jobName = "";
    private JobLauncher jobLauncher = null;
    private String selectedJob;
    private String statusJob = "Exit Status : ";
    private Job job;
    ApplicationContext context;
    private String[] lstJobs;

    /**
     * Execute
     */
    public ExecuteJobBean() {
        this.context = ApplicationContextProvider.getApplicationContext();
        this.lstJobs = context.getBeanNamesForType(Job.class);


        if (jobLauncher == null)
            jobLauncher = (JobLauncher) context.getBean("jobLauncher");
    }

    /**
     * Execute
     */
    public void executeJob() {

        setJob((Job) context.getBean(this.selectedJob));

        try {
            statusJob = "Exit Status : ";
            JobParameters jobParameters = new JobParametersBuilder().addLong("time", System.currentTimeMillis()).toJobParameters();
            JobExecution execution = jobLauncher.run(getJob(), jobParameters);
            this.statusJob = execution.getStatus() + ", ";
        } catch (Exception e) {
            e.printStackTrace();
            this.statusJob = "Error, " + e.getMessage();
        }
        this.statusJob += " Done!!";
    }

Answer 4

要列出定义为bean的作业，您可以让spring上下文为您将所有类型为Job的bean类型注入到列表中，如下所示：

@Autowired
private List<? extends Job> jobs;

..
//You can then launch you job given a name.