# Business Logic — JBSbatKKBndWdtUpdFile.execute() [61 LOC]

| Field | Value |
|-------|-------|
| Fully Qualified Name | `eo.business.service.JBSbatKKBndWdtUpdFile` |
| Layer | Batch (Package: `eo.business.service`) |
| Module | `service` (Package: `eo.business.service`) |

## 1. Role

### JBSbatKKBndWdtUpdFile.execute()

This method is the main processing entry point for the **Domain Control File Download Registration** batch component (`JBSbatKKBndWdtUpdFile`), responsible for ingesting "hagaki" (postcard-style) communication volume over-limit notification files into the system. Specifically, it performs a three-stage pipeline: (1) reads and counts lines from an input notification file, (2) registers the file as a managed electronic document in the electronic file management system, and (3) inserts a corresponding download file management record into the `ZM_T_DL_FILE_KANRI` database table. It implements the **delegation pattern** — delegating file I/O to `JBSbatInputFileUtil`, electronic file creation to `JCCBatCommon.createDenshiFile`, and database persistence to its own private `insertFileKanri()` method. As a batch service extending `JBSbatBusinessService`, it acts as an **entry point** invoked by the batch scheduler framework rather than a screen-facing utility. The method processes all lines in the file to determine the data record count but does not dispatch based on service types or categories — it handles a single notification type: communication volume over-limit notices (ハガキ用通信量超過通知).

## 2. Processing Pattern (Detailed Business Logic)

```mermaid
flowchart TD
    START(["Start: execute()"])
    START --> S1["Get System Date Time"]
    S1 --> S2["Initialize postCardReader and datacnt"]
    S2 --> TRY["TRY Block"]
    TRY --> INIT["Create JBSbatInputFileUtil from in_postcard_file_path"]
    INIT --> ENCODE["Set Encoding to SJIS"]
    ENCODE --> CREATE["Create Reader"]
    CREATE --> LOOP{"postCardReader.ready()"}
    LOOP -->|True| READ["Read Line into rline"]
    READ --> COUNT["Increment datacnt"]
    COUNT --> LOOP
    LOOP -->|False| FINALLY["FINALLY Block"]
    FINALLY --> CLOSE["Close postCardReader"]
    CLOSE --> REG["Register Electronic File"]
    REG --> CDF["Call JCCBatCommon.createDenshiFile"]
    CDF --> INSERT["Download File Management Insert"]
    INSERT --> DBINSERT["Call insertFileKanri"]
    DBINSERT --> RET["Return null"]
    RET --> END(["End"])
    TRY --> CATCH["CATCH: IOException"]
    CATCH --> THROW["Throw JBSbatBusinessException"]
    THROW --> END
```

**CRITICAL — Constant Resolution:**

| Constant | Actual Value | Business Meaning |
|----------|-------------|------------------|
| `JKKBatConst.SJIS` | `"Shift-JIS"` | Character encoding for the notification input file |
| `FILE_CD_POSTCARD_TIIK_LMT_INFO` | `"000000000066"` | Processing management number for communication volume over-limit info (ハガキ用帯域制御情報) |
| `SEQ_PREFIX_SEQ_FILE_NOO` | `""` | Sequence prefix for file number (empty) |
| `SEQ_LEN_SEQ_FILE_NO` | `12` | Sequence digit length for file number |

**Processing Flow Description:**

1. **S1**: Capture the current system date-time stamp to be used throughout processing as the timestamp for file registration records.

2. **S2**: Initialize the file reader variable (`postCardReader`) to `null` and the data counter (`datacnt`) to `0`.

3. **TRY**: Enter the try block and initialize the input file reader:
   - Create `JBSbatInputFileUtil` using the `in_postcard_file_path` instance field (set during `initial()` from the common item's free item).
   - Set encoding to `Shift-JIS` (resolved from `JKKBatConst.SJIS`).
   - Call `createReader()` to open the file.
   - Loop through each line: call `ready()` to check if more lines exist, then `readLine()` to consume each line, incrementing `datacnt` for each row.

4. **FINALLY**: Ensure the file reader is always closed by calling `postCardReader.close()` within the finally block, even if an exception occurs.

5. **CATCH**: If an `IOException` occurs during file reading, wrap and rethrow it as a `JBSbatBusinessException` using error code `EDKB0050CE`, passing the original exception message.

6. **REG**: After successful file reading, register the notification file in the electronic file management system by calling `JCCBatCommon.createDenshiFile()` with the common item, empty file code, file path, and null deletion date.

7. **INSERT**: Register the electronic file management number returned from `createDenshiFile()` into the download file management table (`ZM_T_DL_FILE_KANRI`) by calling `insertFileKanri()` with the data line count, the electronic file management number (`rc[0]`), and the system date-time.

8. **Return**: Return `null` as the output (the batch result is handled through file management registration rather than return value).

## 3. Parameter Analysis

| No | Parameter Name | Type | Business Description |
|----|---------------|------|---------------------|
| - | (none) | - | This method takes no parameters. Configuration is obtained from instance fields set during the `initial()` lifecycle method. |

**Instance fields and external state read by this method:**

| Field | Type | Business Description |
|-------|------|---------------------|
| `in_postcard_file_path` | `String` | File system path to the hagaki (postcard-style) communication volume over-limit notification input file. Set during `initial()` from `super.commonItem.getFreeItem()`. |
| `super.commonItem` | `JBSbatCommonItem` | Batch common parameters inherited from the parent service class — includes batch execution context, user information, and shared data passed through the batch framework. |

## 4. CRUD Operations / Called Services

### Pre-computed evidence from code analysis graph:

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|----------------------|
| R | `JCCBatCommon.getSysDateTimeStamp` | JCCBatCommon | - | Reads current system date-time stamp for timestamping file records |
| R | `JBSbatInputFileUtil.ready` | JBSbatInputFile | - | Checks if more lines are available in the notification input file |
| R | `JBSbatInputFileUtil.readLine` | JBSbatInputFile | - | Reads one line from the hagaki notification file |
| - | `JBSbatInputFileUtil.close` | JBSbatInputFile | - | Closes the notification file reader in the finally block |
| - | `JBSbatInputFileUtil.createReader` | JBSbatInputFile | - | Opens and initializes the notification file for reading |
| - | `JBSbatInputFileUtil.setEncode` | JBSbatInputFile | - | Sets file encoding to Shift-JIS |
| C | `JCCBatCommon.createDenshiFile` | JCCBatCommon | - | Registers the notification file in electronic file management (creates a new electronic file record) |
| C | `JBSbatKKBndWdtUpdFile.executeZM_T_DL_FILE_KANRI_PKINSERT` | JBSbatKKBndWdtUpdFile | `ZM_T_DL_FILE_KANRI` | Inserts a new download file management record with all primary key fields (file number, transaction management number, electronic file management number, file name, file size, data count, timestamps) |

**Operation Classification Details:**

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|----------------------|
| R | `getSysDateTimeStamp` | JCCBatCommon | - | Fetches the system date-time stamp (YYYYMMDDHHMMSS format) used to timestamp the file registration and insertion records |
| R | `JBSbatInputFileUtil.ready` | JBSbatInputFile | - | Polls whether the notification input file has additional unread lines (used in the while-loop condition) |
| R | `JBSbatInputFileUtil.readLine` | JBSbatInputFile | - | Extracts each line from the hagaki notification file; the content is consumed solely for counting purposes |
| C | `createDenshiFile` | JCCBatCommon | Electronic File Management | Creates a new electronic file management record for the notification file. Returns `String[]` where `rc[0]` contains the generated electronic file management number (`EFILE_KANRI_NO`) |
| C | `insertFileKanri` | JBSbatKKBndWdtUpdFile | `ZM_T_DL_FILE_KANRI` | Private method that constructs a `JBSbatCommonDBInterface` parameter map and delegates to `executeZM_T_DL_FILE_KANRI_PKINSERT` to insert a download file management record. Fields set: file number (from sequence `SEQ_FILE_NO`), processing management number (`000000000066`), electronic file management number, file name (derived from path), file size (empty), data count (line count from reading), file registration date-time (system date-time), and all optional fields (deletion date, add/update/delete timestamps, operator accounts, invalid flag) set to null |

## 5. Dependency Trace

No callers found for `JBSbatKKBndWdtUpdFile.execute()` in the codebase.

| # | Caller (Screen/Batch) | Call Chain (Full Path to this Method) | Terminal (SC / CRUD / Entity) |
|---|----------------------|--------------------------------------|-------------------------------|
| - | No callers found | - | `createDenshiFile [C] Electronic File Management`<br>`executeZM_T_DL_FILE_KANRI_PKINSERT [C] ZM_T_DL_FILE_KANRI` |

**Notes:**
- `JBSbatKKBndWdtUpdFile` extends `JBSbatBusinessService` which is part of the batch framework. This method is likely invoked by the batch scheduler framework via reflection or a batch job configuration that is not present in the source code.
- The batch component's purpose is to process hagaki (postcard-style) communication volume over-limit notifications that are dropped at a configurable file system path.

## 6. Per-Branch Detail Blocks

### Block 1 — SET (L95)

> Acquire the system date-time stamp for use throughout processing.

| # | Type | Code |
|---|------|------|
| 1 | CALL | `sysDateTime = JCCBatCommon.getSysDateTimeStamp()` |

---

### Block 2 — SET (L99-L100)

> Initialize the file reader variable and data counter before the try block.

| # | Type | Code |
|---|------|------|
| 1 | SET | `postCardReader = null` |
| 2 | SET | `datacnt = 0` |

---

### Block 3 — TRY (L102)

> Main processing: open the notification file, iterate over all lines to count records, then handle exceptions and cleanup.

#### Block 3.1 — SET (L104-L107)

> Initialize the input file reader with the notification file path and encoding.

| # | Type | Code |
|---|------|------|
| 1 | SET | `rline = null` |
| 2 | CALL | `postCardReader = new JBSbatInputFileUtil(in_postcard_file_path)` — Create input file class [-> File path from `in_postcard_file_path` instance field] |
| 3 | CALL | `postCardReader.setEncode(JKKBatConst.SJIS)` — Set encoding to `Shift-JIS` [-> CONSTANT `JKKBatConst.SJIS` = "Shift-JIS"] |
| 4 | CALL | `postCardReader.createReader()` — Create reader [-> Opens the file for reading] |

#### Block 3.2 — WHILE (L109-L113)

> Read each line from the notification file and count the number of data rows.

| # | Type | Code |
|---|------|------|
| 1 | CALL | `postCardReader.ready()` — Check if more lines are available |
| 2 | CALL | `rline = postCardReader.readLine()` — Read one line [-> Line content consumed for counting only] |
| 3 | SET | `datacnt = datacnt + 1` — Increment data count [-> Tracks total number of notification data rows] |

#### Block 3.3 — CATCH: IOException (L115-L118)

> If any I/O error occurs during file reading (e.g., file not found, permission denied), wrap the exception as a business exception.

| # | Type | Code |
|---|------|------|
| 1 | THROW | `throw new JBSbatBusinessException(JPCBatchMessageConstant.EDKB0050CE, new String[]{ioe.getMessage()})` — Convert IO error to business exception [-> Error code `EDKB0050CE` with the original IOException message as a parameter] |

#### Block 3.4 — FINALLY (L119-L123)

> Ensure the file reader is always closed to prevent resource leaks, regardless of whether an exception occurred.

| # | Type | Code |
|---|------|------|
| 1 | IF | `null != postCardReader` |
| 2 | CALL | `postCardReader.close()` — Close the file reader [-> Only executes if reader was initialized] |

---

### Block 4 — SET (L127-L133)

> Prepare arguments for registering the notification file as an electronic file in the management system.

| # | Type | Code |
|---|------|------|
| 1 | SET | `arg0 = super.commonItem` — Business common electronic file [-> Batch context: common item from parent service class] |
| 2 | SET | `arg1 = ""` — File code [-> Empty string: no specific file code assigned] |
| 3 | SET | `arg2 = in_postcard_file_path` — File path [-> The hagaki notification input file path] |
| 4 | SET | `arg3 = null` — File deletion date |

---

### Block 5 — CALL (L134)

> Register the notification file in the electronic file management system. This creates a managed record for the file and returns the generated electronic file management number.

| # | Type | Code |
|---|------|------|
| 1 | CALL | `rc = JCCBatCommon.createDenshiFile(arg0, arg1, arg2, arg3)` — Register electronic file [-> Returns `String[]` where `rc[0]` is the electronic file management number (`EFILE_KANRI_NO`)] |

---

### Block 6 — CALL (L138)

> Insert the registered electronic file management number into the download file management table (`ZM_T_DL_FILE_KANRI`) with the file's metadata (data count, file name, registration timestamp, etc.).

| # | Type | Code |
|---|------|------|
| 1 | CALL | `insertFileKanri(datacnt, rc[0], sysDateTime)` — Download file management insert [-> `datacnt`: line count from reading; `rc[0]`: electronic file management number from `createDenshiFile`; `sysDateTime`: system date-time] |
| 2 | RETURN | `return null` |

## 7. Glossary

| Term | Type | Business Meaning |
|------|------|------------------|
| `in_postcard_file_path` | Field | Input file path — the file system path to the hagaki (postcard-style) communication volume over-limit notification file. Set during batch initialization from the common item's free item data. |
| `datacnt` | Variable | Data row count — the number of lines in the notification file, representing the number of individual over-limit notification records to be processed. |
| `sysDateTime` | Variable | System date-time stamp — a timestamp (YYYYMMDDHHMMSS format) capturing the current time at the start of processing, used as the registration timestamp for file management records. |
| `FILE_CD_POSTCARD_TIIK_LMT_INFO` | Constant | Processing management number `000000000066` — the fixed code identifying hagaki (postcard) communication volume over-limit information. Used as the file code when registering in file management. |
| `SEQ_PREFIX_SEQ_FILE_NOO` | Constant | Sequence prefix for file number — an empty string, meaning no prefix is applied to generated file numbers. |
| `SEQ_LEN_SEQ_FILE_NO` | Constant | Sequence digit length for file number — `12` digits. File numbers are generated as 12-digit numeric sequences without prefix. |
| `ZM_T_DL_FILE_KANRI` | DB Table | Download File Management Table — the database table that tracks files available for download by customers. Stores file numbers, management numbers, file names, sizes, registration timestamps, and deletion flags. |
| `JBSbatInputFileUtil` | Class | Input file utility — a framework class providing file reading capabilities with configurable encoding. Used to open, read, and close text-based notification files. |
| `JCCBatCommon` | Class | Batch common utility — a shared service component providing common batch operations including system date-time retrieval and electronic file registration. |
| `createDenshiFile` | Method | Electronic file creation — registers a file in the electronic file management system, generating an electronic file management number (`EFILE_KANRI_NO`). Used to formally track files entering the system. |
| `insertFileKanri` | Method | File management insert — a private method that constructs and inserts a download file management record into `ZM_T_DL_FILE_KANRI` with all required metadata fields. |
| `executeZM_T_DL_FILE_KANRI_PKINSERT` | Method | Primary key insert — a private method performing the actual database insert into `ZM_T_DL_FILE_KANRI` with all primary key fields (full item registration). |
| `EDKB0050CE` | Constant | Error code — the batch error code thrown when an I/O exception occurs during notification file reading, indicating file processing failure. |
| `SJIS` | Constant | Shift-JIS — the character encoding standard used for Japanese text files in this system. The notification input file is expected to be encoded in Shift-JIS. |
| hagaki (ハガキ) | Business term | Postcard/Notification — refers to postcard-style communication volume over-limit notifications sent to customers. In this system, these notifications are delivered as text files at a configured path for batch processing. |
| communication volume over-limit (通信量超過) | Business term | The condition where a customer's data usage exceeds their contracted limit, triggering the generation of a notification file for batch processing. |
| `EFILE_KANRI_NO` | Field | Electronic file management number — a unique identifier generated when a file is registered in the electronic file management system. |
| `FILE_NO` | Field | File number — a 12-digit numeric sequence identifier assigned to each file in the download file management table. |
| `FILE_NM` | Field | File name — derived from the file path by extracting the last segment after the final `/` character. |
| `FILE_SIZE` | Field | File size — stored as an empty string in this implementation (not calculated from the actual file). |
| `DATA_CNT` | Field | Data count — the number of data rows (lines) counted during file reading. |
| `FILE_ADD_DTM` | Field | File registration date-time — the timestamp when the file was registered in the download file management table (set to system date-time). |
| `FILE_DEL_YMD` | Field | File deletion date — the scheduled or actual date when the file will be deleted; set to `null` meaning no deletion date is assigned. |
| `MK_FLG` | Field | Invalid flag — a flag indicating whether the record is marked as invalid; set to `null` meaning no invalidation flag is applied. |
| `add_dtm`, `upd_dtm`, `del_dtm` | Fields | Add/Update/Delete date-time stamps — audit fields tracking when the record was added, last updated, or deleted; all set to `null` in this insertion. |
| `add_opeacnt`, `upd_opeacnt`, `del_opeacnt` | Fields | Add/Update/Delete operator accounts — audit fields tracking which operator performed each action; all set to `null` in this insertion. |
| `JBSbatBusinessException` | Class | Business exception — the framework exception type used to propagate business logic errors (such as file I/O failures) with structured error codes. |
| `TRN_KANRI_NO` | Field | Transaction management number — the file code (`000000000066`) used as a processing management identifier for this specific notification type. |
| JCCBatCommon | Abbreviation | Joint Customer Control Batch Common — the shared batch utility component providing common operations for all batch services, including system date-time retrieval and electronic file management. |