StepExecutionDao (Spring Batch 4.1.4.RELEASE API)

所有已知实现类:
JdbcStepExecutionDao, MapStepExecutionDao
```
public interface StepExecutionDao
```

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`void`	`addStepExecutions(JobExecution jobExecution)`	Retrieve all the `StepExecution` for the parent `JobExecution`.
`StepExecution`	`getStepExecution(JobExecution jobExecution, java.lang.Long stepExecutionId)`	Retrieve a `StepExecution` from its id.
`void`	`saveStepExecution(StepExecution stepExecution)`	Save the given StepExecution.
`void`	`saveStepExecutions(java.util.Collection<StepExecution> stepExecutions)`	Save the given collection of StepExecution as a batch.
`void`	`updateStepExecution(StepExecution stepExecution)`	Update the given StepExecution Preconditions: Id must not be null.

- 方法详细资料
  - saveStepExecution
```
void saveStepExecution(StepExecution stepExecution)
```
    Save the given StepExecution. Preconditions: Id must be null. Postconditions: Id will be set to a unique Long.
    参数:
    stepExecution - StepExecution instance to be saved.
  - saveStepExecutions
```
void saveStepExecutions(java.util.Collection<StepExecution> stepExecutions)
```
    Save the given collection of StepExecution as a batch. Preconditions: StepExecution Id must be null. Postconditions: StepExecution Id will be set to a unique Long.
    参数:
    stepExecutions - a collection of JobExecution instances to be saved.
  - updateStepExecution
```
void updateStepExecution(StepExecution stepExecution)
```
    Update the given StepExecution Preconditions: Id must not be null.
    参数:
    stepExecution - StepExecution instance to be updated.
  - getStepExecution
```
@Nullable
StepExecution getStepExecution(JobExecution jobExecution,
                               java.lang.Long stepExecutionId)
```
    Retrieve a StepExecution from its id.
    参数:
    jobExecution - the parent JobExecution
    stepExecutionId - the step execution id
    返回:
    a StepExecution
  - addStepExecutions
```
void addStepExecutions(JobExecution jobExecution)
```
    Retrieve all the StepExecution for the parent JobExecution.
    参数:
    jobExecution - the parent job execution