java - Spring 批处理 : JobExecution from PreparedStatementSetter

Question

我有一个带有PreparedStatementSetter的Spring批处理，用于查询读取器步骤。我想从之前保存到 ExecutionContext 的PreparedStatementSetter 访问全局数据。

我如何从这个PreparedStatementSetter访问ExecutionContext？

@Component
public class CurrentBatchIdPreparedStatementSetter implements PreparedStatementSetter
{
    @Override
    public void setValues(PreparedStatement preparedStatement) throws SQLException
    {
        // how to access to ExecutionContext here ?
    }
}

谢谢

是的，我们可以

Answer 1

如果范围是步骤，我们可以从步骤执行中获取 ExecutionContext。

    @Component
    public class CurrentBatchIdPreparedStatementSetter implements PreparedStatementSetter
    {
       @Value("#{stepExecution}")
       private StepExecution stepExecution;

        @Override
        public void setValues(PreparedStatement preparedStatement) throws SQLException
        {
            final ExecutionContext executionContext = stepExecution.getExecutionContext();
            //Do your operations here
        }
    }

您还可以从作业执行上下文中获取相同的内容。

  @Value("#{jobExecution}")
   private JobExecution jobExecution;
   //inside method
   final ExecutionContext executionContext = jobExecution.getExecutionContext();

或者您可以轻松地从作业执行上下文中获取值(value)。

        @Value ( "# {jobExecutionContext ['param1']}" ) 
        private String  param1;
        @Value ( "# {jobExecutionContext ['param2']}" )  
        private String  param2;