如何使用不同的作业参数多次运行弹簧批处理作业？(How to run spring batch job multiple times with different job parameters?)

 我们用单步创建了一个简单的弹簧批处理作业。 有自定义实现的ItemReader和ItemWriter。 ItemReader从job参数获取初始数据。 当作为独立的java进程运行时，批处理运行完美。 但我们想要的是在一些服务器上托管批处理。 因此，我们已经创建了REST服务来初始化批处理。 该服务调用作业URL并传递一些参数。 此参数作为作业参数传递给批处理。 调用一个参数时，服务和作业运行正常。 
 
 但是当我们不止一次调用该服务（两次用于测试目的）时，批处理行为奇怪。 我们正在传递不同的工作参数。 但是当第二个作业初始化执行开始时，ItemReader接收的作业参数值与第一次执行的作业参数值相同。 并且两个执行都相互干扰，共享数据库连接，干扰检索的数据等。 
 
 我们已经尝试将restartable参数设置为false但它不起作用。 我们还尝试了以下解决方案： 
 
 我们可以创建同一个java（spring）批处理作业的多个实例吗？ 
 
 上面的解决方案开始在JBoss中给出“中断尝试锁定”错误。 
 
 在进一步调查中，我们发现ItemReader只被初始化一次。 这就是为什么它获得相同的作业参数值并干扰先前的执行。 
 
 编辑 
 以下是作业配置： 
 
<bean id="jobLauncher"
class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
<property name="jobRepository" ref="jobRepository" />
 
 <job id="jobid" restartable="false"> <step id="step1"> <tasklet> <chunk reader="reader" writer="writer" commit-interval="2"> </chunk> </tasklet> </step> </job> 
 
 以下是启动作业的代码段： 
 
JobLauncher jobLauncher = (JobLauncher) context.getBean("jobLauncher");
Job job = (Job) context.getBean("jobid");

try {
    JobParameters param = new JobParametersBuilder().addString("key","value").toJobParameters();
    JobExecution execution = jobLauncher.run(job, param);
} catch (Exception e) {
    e.printStackTrace();
}
 
 有人可以建议一些解决方案吗？ 我错过了一步的配置吗？ 提前致谢。 

We have created a simple spring batch job with single step. There are custom implemented ItemReader and ItemWriter. The ItemReader gets the initial data from job parameter. The batch runs perfectly when run as a standalone java process. But what we want is to host the batch on some server. Therefore, we have created REST service to initialize the batch. The service calls the job URL and passes some parameter. This parameter is passed as job parameter to the batch. The service and job run fine when it is called for one parameter.
 
But when we call the service more than once (twice for testing purpose), the batch behaves strangely. We are passing different job parameters. But when the execution starts for second job initialization, the job parameter value which is received by the ItemReader is the same as the one for the first execution. And both execution interfere with each other, sharing database connection, interfering with data retrieved etc.
 
We have tried setting the restartable parameter to false but it didn't work. We have also tried the following solution:
 
Can we create multiple instances of a same java(spring) batch job?
 
The above solution started giving "Interrupted attempting lock" error in JBoss.
 
On further investigation we found that ItemReader is getting initialized only once. That is why it is getting same job parameter value and is interfering with the previous execution.
 
EDIT
 Following is the job configuration:
 
<bean id="jobLauncher"
class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
<property name="jobRepository" ref="jobRepository" />
 
 <job id="jobid" restartable="false"> <step id="step1"> <tasklet> <chunk reader="reader" writer="writer" commit-interval="2"> </chunk> </tasklet> </step> </job>
 
Following is the code snippet to launch the job:
 
JobLauncher jobLauncher = (JobLauncher) context.getBean("jobLauncher");
Job job = (Job) context.getBean("jobid");

try {
    JobParameters param = new JobParametersBuilder().addString("key","value").toJobParameters();
    JobExecution execution = jobLauncher.run(job, param);
} catch (Exception e) {
    e.printStackTrace();
}
 
Can anyone please suggest some solution? Am I missing some configuration for the step? Thanks in advance.

原文：https://stackoverflow.com/questions/31313826