# Com / Optage / Kopt / Batch

## Overview

The `com.optage.kopt.batch` package contains batch-processing entry-point classes (stubbed for SPEC-SCOPED-WIKI testing). These classes serve as the public interface for triggering batch operations, with each class representing a distinct batch run. The module currently exposes three classes — `KKPRC14901`, `KKPRC24901`, and `KKPRC34901` — each responsible for initiating a specific batch job.

## Key Classes and Interfaces

### KKPRC14901

Class | [KKPRC14901](src/main/java/com/optage/kopt/batch/KKPRC14901.java)
---|---

`KKPRC14901` is the primary batch entry point. It exposes two public methods — `check()` and `run()` — which together form a pre-flight / execute pattern:

- **`check()`** — Acts as a pre-flight or validation hook. In the current implementation it is a no-op placeholder. In a production context this method would typically perform input validation, resource readiness checks, or guard conditions before the main batch logic runs.

- **`run()`** — Executes the core batch work. It delegates to `EKK0301A010().process()` from the `com.optage.kopt.ekk` package, indicating that the actual batch processing logic lives in a separate subsystem. This class acts as the facade that initiates that downstream work.

```java
public class KKPRC14901 {
  public void check() { /* KKPRC batch check */ }
  public void run() { new EKK0301A010().process(); }
}
```

### KKPRC24901

Class | [KKPRC24901](src/main/java/com/optage/kopt/batch/KKPRC24901.java)
---|---

`KKPRC24901` is a secondary batch runner, identified by the "2" in its code. It has a single method:

- **`run()`** — The batch execution entry point. Currently a no-op placeholder. Its naming convention suggests it handles a different class of batch operation from `KKPRC14901`, likely a follow-up or related batch.

```java
public class KKPRC24901 {
  public void run() { /* KKPRC secondary batch */ }
}
```

### KKPRC34901

Class | [KKPRC34901](src/main/java/com/optage/kopt/batch/KKPRC34901.java)
---|---

`KKPRC34901` is a tertiary batch runner. It mirrors `KKPRC24901` in structure:

- **`run()`** — The batch execution entry point. Currently a no-op placeholder, intended to handle a third distinct batch scenario.

```java
public class KKPRC34901 {
  public void run() { /* KKPRC tertiary batch */ }
}
```

## How It Works

The batch module follows a simple facade pattern:

```mermaid
flowchart TD
    A["com.optage.kopt.batch"] --> B["KKPRC14901"]
    A --> C["KKPRC24901"]
    A --> D["KKPRC34901"]
    B --> E["EKK0301A010
com.optage.kopt.ekk"]
    style A fill:#e1f5fe
    style B fill:#f3e5f5
    style E fill:#fff3e0
```

1. An external caller invokes one of the `KKPRC*` classes (e.g., `new KKPRC14901().run()`).
2. For `KKPRC14901`, the `run()` method instantiates `EKK0301A010` from `com.optage.kopt.ekk` and calls its `process()` method, delegating the actual work.
3. `KKPRC24901` and `KKPRC34901` currently have no-op `run()` methods but are designed to plug into the same pattern — delegating to their respective processing classes when implemented.

The `check()` / `run()` split in `KKPRC14901` suggests an intended pre-flight pattern where `check()` validates prerequisites before `run()` executes.

## Dependencies and Integration

| Dependency | Package | Role |
|---|---|---|
| `EKK0301A010` | `com.optage.kopt.ekk` | Used by `KKPRC14901.run()` to delegate the actual batch processing work. |

The package depends on `com.optage.kopt.ekk` for its runtime functionality. `KKPRC14901` creates a new instance of `EKK0301A010` and calls `process()` on it, making `com.optage.kopt.ekk` the downstream workhorse of this module.

## Notes for Developers

- **Stub classes**: All three classes in this package are currently auto-generated fixtures for SPEC-SCOPED-WIKI tests. The method bodies are no-op placeholders. When implementing real batch logic, follow the pattern established by `KKPRC14901.run()` — instantiate the relevant `EKK*` processor and delegate to it.
- **Naming convention**: The class codes follow the pattern `KKPRC[1|2|3]4901` where the middle digit distinguishes batch variants, and `EKK0301A010` follows a similar convention in the `ekk` package. Use the same naming scheme when adding new batch runners.
- **Extension points**: To add a new batch type, create a new class `KKPRC[N]4901` with at least a `run()` method that delegates to the appropriate `EKK*` processor class in `com.optage.kopt.ekk`.
- **No child modules**: This package has no sub-packages — all batch entry points live at the package root.