# Com / Optage / Kopt

## Overview

The `com.optage.kopt` package is a sub-package within the Optage platform that appears to support core banking or financial processing workflows — specifically SOD (Start of Day) dispatch and validation operations. The module is structured as a layered system of sub-packages, each responsible for a distinct concern: batch entry-points, business-process orchestration, contract processing, external notifications, and data-transfer objects.

At this stage, most classes are auto-generated fixture stubs intended for SPEC-SCOPED-WIKI automated tests. The architecture, however, reveals a clear production design:

- **Batch layer** (`com.optage.kopt.batch`) — public entry points for triggering batch operations.
- **Business processing** (`com.optage.kopt.bp`) — orchestrates SOD dispatch and validation workflows.
- **Contract processing** (`com.optage.kopt.ekk`) — handles contract operations and triggers downstream notifications.
- **KKW notifications** (`com.optage.kopt.kkw`) — receives notification triggers from EKK.
- **DTO layer** (`com.optage.kopt.dto`) — lightweight request/response containers for SOD operations.
- **ESC control** (`com.optage.kopt.esc`) — a future-facing stub for an Engine Service Controller feature.
- **Unrelated test fixtures** (`com.optage.kopt.unrelated`) — intentionally isolated placeholder classes for tooling validation.

The SOD flow is the most coherent production path: a caller creates a `JKKSodRequestDTO`, passes it to the SOD dispatch controller (`JKKHakkoSODCC`), which delegates to a send handler (`JKKSodSendCC`) and a validator (`KKPRC14901`). That validator in turn delegates to contract processing (`EKK0301A010`), which may notify the KKW subsystem. The result is returned as a `JKKSodResponseDTO`.

## Sub-module Guide

### Batch (`com.optage.kopt.batch`)

The batch package provides three entry-point classes — `KKPRC14901`, `KKPRC24901`, and `KKPRC34901` — each representing a distinct batch job runner. The naming convention (`KKPRC[1|2|3]4901`) uses a middle digit to distinguish variants. `KKPRC14901` is the most implemented: it follows a pre-flight / execute pattern with `check()` (validation placeholder) and `run()` (delegates to `EKK0301A010.process()`). The other two are no-op stubs, reserved for future batch types.

This layer acts as the public facade — external schedulers and other packages invoke `KKPRC*` classes to initiate batch work.

### Business Processing (`com.optage.kopt.bp`)

The `bp` (business processing) package coordinates SOD (Start of Day) workflows. Its central class, `JKKHakkoSODCC`, orchestrates two operations:

- **`dispatch()`** — creates a `JKKSodSendCC` instance and calls `send()` to perform the actual data dispatch to downstream systems.
- **`validate()`** — instantiates `KKPRC14901` and calls `check()`, delegating validation to the batch layer.

Additional support classes include:

- `JKKSodSendCC` — the send/dispatch handler that implements the actual communication logic.
- `JKKHakkoSODHelper` — a stateless utility that trims whitespace from string inputs before they enter the dispatch or validation flow.
- `JKKBpServiceBase` — a base class with a `baseInit()` hook for shared initialization, intended for future subclasses.

### Contract Processing (`com.optage.kopt.ekk`)

The `ekk` package handles contract-related processing. It contains two classes:

- **`EKK0301A010`** — the primary contract processor. Its `process()` method is the entry point invoked by `KKPRC14901.run()`. It also provides a `notify()` method that triggers `KKW0100B001.trigger()` in the KKW package, creating a unidirectional bridge to the notification subsystem.
- **`EKK0301A020`** — a secondary, independent contract processing path that has no downstream dependencies.

### Notifications (`com.optage.kopt.kkw`)

The `kkw` package is the downstream target of EKK's notification mechanism. It contains a single class, `KKW0100B001`, whose `trigger()` method serves as the batch-trigger entry point. This class is a self-contained stub with no dependencies.

### Data Transfer (`com.optage.kopt.dto`)

The `dto` package defines two plain data carrier classes:

- **`JKKSodRequestDTO`** — holds `tenantId` and `serviceId` to scope an SOD operation to a specific tenant and service.
- **`JKKSodResponseDTO`** — holds `status` and `message` to return operation results.

These DTOs form a standard request-response pair consumed by the business processing layer. They are flat structures designed for straightforward serialization.

### ESC Control (`com.optage.kopt.esc`)

The `esc` package contains a single stub class, `ESC0101B001`, with a `control()` method. This appears to be scaffolding for a future Engine Service Controller feature — no runtime behavior exists yet, and the class has no dependencies.

### Test Fixtures (`com.optage.kopt.unrelated`)

The `unrelated` package contains `XYZ99999Unrelated`, an intentionally isolated class with no dependencies. It exists solely to exercise the wiki-generation and code-analysis tooling, providing a minimal, self-contained fixture for the test harness to index.

## How the Sub-modules Interact

The sub-modules form a layered pipeline where responsibility flows from top to bottom:

```mermaid
flowchart TD
    subgraph Kopt["com.optage.kopt"]
        subgraph Batch["Batch Layer"]
            B1["KKPRC14901"]
            B2["KKPRC24901"]
            B3["KKPRC34901"]
        end
        subgraph Bp["Business Processing"]
            BP1["JKKHakkoSODCC"]
            BP2["JKKSodSendCC"]
            BP3["JKKHakkoSODHelper"]
            BP4["JKKBpServiceBase"]
        end
        subgraph Ekk["Contract Processing"]
            E1["EKK0301A010"]
            E2["EKK0301A020"]
        end
        subgraph Kkw["KKW Notifications"]
            K1["KKW0100B001"]
        end
        subgraph Dto["Data Transfer"]
            D1["JKKSodRequestDTO"]
            D2["JKKSodResponseDTO"]
        end
        subgraph Esc["ESC Control"]
            ESC1["ESC0101B001"]
        end
        subgraph Unrelated["Test Fixtures"]
            U1["XYZ99999Unrelated"]
        end
    end

    BP1 -->|"dispatch() sends"| BP2
    BP1 -->|"validate() calls"| B1
    B1 -->|"process() delegates"| E1
    E1 -->|"notify() triggers"| K1
    BP3 -->|"format() supports"| BP1
    D1 -->|"consumed by"| BP1
    D2 -->|"produced by"| BP1
    U1 -->|"isolated fixture"| Kopt
```

**Data flow through the system:**

1. **Request ingestion** — A caller constructs a `JKKSodRequestDTO` and passes it to `JKKHakkoSODCC`.
2. **Pre-processing** — String inputs may be normalized via `JKKHakkoSODHelper.format()`.
3. **Validation** — `JKKHakkoSODCC.validate()` delegates to `KKPRC14901.check()`, which acts as a pre-flight guard.
4. **Dispatch** — `JKKHakkoSODCC.dispatch()` creates `JKKSodSendCC` and calls `send()`, which communicates with downstream systems.
5. **Batch execution** — If `KKPRC14901.run()` is invoked, it delegates to `EKK0301A010.process()` for contract processing.
6. **Notification** — `EKK0301A010.notify()` triggers `KKW0100B001.trigger()`, notifying the KKW subsystem.
7. **Response** — A `JKKSodResponseDTO` with `status` and `message` is returned to the caller.

## Key Patterns and Architecture

### Delegation over Composition

Classes in this package favor creating new instances of collaborators on each call rather than holding long-lived references. For example, `JKKHakkoSODCC.dispatch()` creates a fresh `JKKSodSendCC` instance, and `EKK0301A010.notify()` creates a fresh `KKW0100B001`. This keeps classes stateless and simple, though it means dependencies are instantiated on every invocation.

### Facade Pattern

Both the batch and business processing layers use the facade pattern to hide implementation complexity:

- `KKPRC14901` exposes `check()` and `run()` as a simple interface to the deeper `EKK0301A010.process()` logic.
- `JKKHakkoSODCC` exposes `dispatch()` and `validate()` as the single entry point to a multi-step workflow involving send handlers, validators, and formatters.

### Pre-flight / Execute Split

`KKPRC14901` implements a `check()` / `run()` split, suggesting an intended pattern where validation and guard conditions are evaluated before the main batch logic executes. This pattern is not yet applied consistently — `KKPRC24901` and `KKPRC34901` only have `run()`.

### Fixture-First Development

All production classes are currently auto-generated stubs. The architecture is designed top-down: the class structure, method signatures, and inter-package dependencies are established, with business logic to be filled in later. This approach allows test infrastructure and wiki-generation tooling to operate against a stable API surface before implementation is complete.

### Naming Conventions

The package follows structured naming patterns:

- **`KKPRC[N]4901`** — Batch entry-point classes, where `[N]` distinguishes variants.
- **`JKK*[CC]`** — Business processing classes, with `CC` suffix (likely denoting a batch control concept).
- **`EKK0301A010` / `EKK0301A020`** — Contract processing classes with a numeric specification code.
- **`KKW0100B001`** — Notification classes following a similar numeric pattern.
- **`ESC0101B001`** — ESC service classes with the `ESC` prefix.

## Dependencies and Integration

### Internal Dependencies

| Source | Target | Purpose |
|--------|--------|---------|
| `com.optage.kopt.bp` | `com.optage.kopt.batch` | `JKKHakkoSODCC.validate()` calls `KKPRC14901.check()` |
| `com.optage.kopt.batch.KKPRC14901` | `com.optage.kopt.ekk` | `KKPRC14901.run()` delegates to `EKK0301A010.process()` |
| `com.optage.kopt.ekk.EKK0301A010` | `com.optage.kopt.kkw` | `EKK0301A010.notify()` triggers `KKW0100B001.trigger()` |
| `com.optage.kopt.bp` | `com.optage.kopt.dto` | `JKKHakkoSODCC` consumes `JKKSodRequestDTO` / `JKKSodResponseDTO` |

### External Dependencies

No external dependencies were detected in the current source index. The module is self-contained within `com.optage.kopt`.

### Dependency Graph

```mermaid
flowchart LR
    Bp["com.optage.kopt.bp"] -->|"validate()"| Batch["com.optage.kopt.batch"]
    Batch -->|"process()"| Ekk["com.optage.kopt.ekk"]
    Ekk -->|"notify()"| Kkw["com.optage.kopt.kkw"]
    Bp -->|"DTOs"| Dto["com.optage.kopt.dto"]
    Esc["com.optage.kopt.esc"] -->|"no deps"| Kopt["com.optage.kopt"]
    Unrelated["com.optage.kopt.unrelated"] -->|"no deps"| Kopt
```

## Notes for Developers

### Implementing Production Logic

- Follow the pattern established by `KKPRC14901.run()` — instantiate the relevant `EKK*` processor and delegate to it.
- The `JKKSodSendCC.send()` method is the primary place to implement the actual SOD dispatch logic.
- String preprocessing needs can be added to `JKKHakkoSODHelper.format()` or as new methods on that class.
- Common initialization for SOD batch operations should use the `JKKBpServiceBase.baseInit()` hook.

### Adding New Components

- **New batch types**: Create a `KKPRC[N]4901` class with at least a `run()` method delegating to the appropriate `EKK*` processor.
- **New contract processors**: Add a class following the `EKK0301A[0-9][0-9]` naming pattern in `com.optage.kopt.ekk`.
- **New DTOs**: Add fields to the existing DTOs or create new request/response pairs, following the flat carrier-class pattern. Consider generating getters, setters, `equals()`, `hashCode()`, and `toString()` (e.g., via Lombok).

### Test Infrastructure

- `JKKHakkoSODCCTest` exists with a placeholder `testMain()` method. Functional test coverage for SOD dispatch and validation flows should be added as implementation progresses.
- The `XYZ99999Unrelated` class in `com.optage.kopt.unrelated` should not be modified — it is a test fixture for wiki-generation tooling.

### Current State

All classes are currently auto-generated fixtures for SPEC-SCOPED-WIKI tests. Method bodies are no-op placeholders. When implementing real logic, respect the existing class structure and inter-package dependencies — the architecture is designed to support the SOD dispatch and validation workflow described in this document.