/**
* LockClass Handler - Lock ABAP Class
*
* Uses AdtClient.lockClass from @mcp-abap-adt/adt-clients.
* Low-level handler: single method call.
*/
import { AdtClient } from '@mcp-abap-adt/adt-clients';
import type { HandlerContext } from '../../../lib/handlers/interfaces';
import {
type AxiosResponse,
return_error,
return_response,
} from '../../../lib/utils';
export const TOOL_DEFINITION = {
name: 'LockClassLow',
description:
'[low-level] Lock an ABAP class for modification. Uses session from HandlerContext. Returns lock handle that must be used in subsequent update/unlock operations.',
inputSchema: {
type: 'object',
properties: {
class_name: {
type: 'string',
description: 'Class name (e.g., ZCL_MY_CLASS).',
},
},
required: ['class_name'],
},
} as const;
interface LockClassArgs {
class_name: string;
}
/**
* Main handler for LockClass MCP tool
*
* Uses AdtClient.lockClass - low-level single method call
*/
export async function handleLockClass(
context: HandlerContext,
args: LockClassArgs,
) {
const { connection, logger } = context;
try {
const { class_name } = args as LockClassArgs;
// Validation
if (!class_name) {
return return_error(new Error('class_name is required'));
}
const client = new AdtClient(connection);
const className = class_name.toUpperCase();
logger?.info(`Starting class lock: ${className}`);
try {
// Lock class
const lockHandle = await client.getClass().lock({ className });
if (!lockHandle) {
throw new Error(
`Lock did not return a lock handle for class ${className}`,
);
}
logger?.info(`✅ LockClass completed: ${className}`);
logger?.info(` Lock handle: ${lockHandle.substring(0, 20)}...`);
return return_response({
data: JSON.stringify(
{
success: true,
class_name: className,
lock_handle: lockHandle,
message: `Class ${className} locked successfully. Use this lock_handle for subsequent update/unlock operations.`,
},
null,
2,
),
} as AxiosResponse);
} catch (error: any) {
logger?.error(
`Error locking class ${className}: ${error?.message || error}`,
);
// Parse error message
let errorMessage = `Failed to lock class: ${error.message || String(error)}`;
if (error.response?.status === 404) {
errorMessage = `Class ${className} not found.`;
} else if (error.response?.status === 409) {
errorMessage = `Class ${className} is already locked by another user.`;
} else if (
error.response?.data &&
typeof error.response.data === 'string'
) {
try {
const { XMLParser } = require('fast-xml-parser');
const parser = new XMLParser({
ignoreAttributes: false,
attributeNamePrefix: '@_',
});
const errorData = parser.parse(error.response.data);
const errorMsg =
errorData['exc:exception']?.message?.['#text'] ||
errorData['exc:exception']?.message;
if (errorMsg) {
errorMessage = `SAP Error: ${errorMsg}`;
}
} catch (_parseError) {
// Ignore parse errors
}
}
return return_error(new Error(errorMessage));
}
} catch (error: any) {
return return_error(error);
}
}
