feat(ql3): prove Console adopted cutover entry

packages/ql3-local-api/src/cli.ts

@@ -5,9 +5,15 @@ import type {
   LocalApplicationProcessSignalSource,
 } from '@qinglong/local-application/process';
 
+import {
+  localApiCliFailureFact,
+  parseLocalApiCliCommand,
+} from './production-process/cliCommand';
+import { runProductionLocalApiCutoverProbe } from './production-process/cutoverProbeProcess';
 import { runProductionLocalApiProcess } from './production-process/processApplication';
 
-const USAGE = 'Usage: ql3-local-api --config /absolute/private-config.json';
+const USAGE =
+  'Usage: ql3-local-api [--cutover-probe] --config /absolute/private-config.json';
 
 const nodeSignals: LocalApplicationProcessSignalSource = Object.freeze({
   subscribe(
@@ -26,36 +32,13 @@ const nodeSignals: LocalApplicationProcessSignalSource = Object.freeze({
   },
 });
 
-function configFileArgument(argv: readonly string[]): string | null {
-  return argv.length === 2 && argv[0] === '--config' && argv[1]
-    ? argv[1]
-    : null;
-}
-
-function failureFact(error: unknown): Readonly<Record<string, unknown>> {
-  const candidate = error as { readonly name?: unknown; readonly code?: unknown };
-  return Object.freeze({
-    schemaVersion: 1,
-    component: 'qinglong3-local-api',
-    level: 'error',
-    event: 'process_failed',
-    name:
-      typeof candidate?.name === 'string' && candidate.name.length <= 128
-        ? candidate.name
-        : 'Error',
-    ...(typeof candidate?.code === 'string' && candidate.code.length <= 128
-      ? { code: candidate.code }
-      : {}),
-  });
-}
-
 async function main(argv: readonly string[]): Promise<void> {
   if (argv.length === 1 && (argv[0] === '--help' || argv[0] === '-h')) {
     process.stdout.write(`${USAGE}\n`);
     return;
   }
-  const configFilePath = configFileArgument(argv);
-  if (!configFilePath) {
+  const command = parseLocalApiCliCommand(argv);
+  if (command === null) {
     process.stderr.write(
       `${JSON.stringify({
         code: 'QL3_LOCAL_API_CLI_USAGE_INVALID',
@@ -66,16 +49,20 @@ async function main(argv: readonly string[]): Promise<void> {
     return;
   }
   try {
-    const stopResult = await runProductionLocalApiProcess({
-      configFilePath,
+    const options = {
+      configFilePath: command.configFilePath,
       signals: nodeSignals,
-      emit(event) {
+      emit(event: Readonly<Record<string, unknown>>) {
         process.stdout.write(`${JSON.stringify(event)}\n`);
       },
-    });
+    };
+    const stopResult =
+      command.mode === 'cutover_probe'
+        ? await runProductionLocalApiCutoverProbe(options)
+        : await runProductionLocalApiProcess(options);
     if (stopResult !== 'stopped') process.exitCode = 1;
   } catch (error) {
-    process.stderr.write(`${JSON.stringify(failureFact(error))}\n`);
+    process.stderr.write(`${JSON.stringify(localApiCliFailureFact(error))}\n`);
     process.exitCode = 1;
   }
 }

packages/ql3-local-api/src/production-process/cliCommand.ts

@@ -0,0 +1,49 @@
+export type LocalApiCliCommand = Readonly<{
+  configFilePath: string;
+  mode: 'api' | 'cutover_probe';
+}>;
+
+export function localApiCliFailureFact(
+  error: unknown,
+): Readonly<Record<string, unknown>> {
+  const candidate = error as {
+    readonly name?: unknown;
+    readonly code?: unknown;
+  };
+  return Object.freeze({
+    schemaVersion: 1,
+    component: 'qinglong3-local-api',
+    level: 'error',
+    event: 'process_failed',
+    name:
+      typeof candidate?.name === 'string' && candidate.name.length <= 128
+        ? candidate.name
+        : 'Error',
+    ...(typeof candidate?.code === 'string' && candidate.code.length <= 128
+      ? { code: candidate.code }
+      : {}),
+  });
+}
+
+export function parseLocalApiCliCommand(
+  argv: readonly string[],
+): LocalApiCliCommand | null {
+  if (argv.length === 2 && argv[0] === '--config' && argv[1]) {
+    return Object.freeze({
+      configFilePath: argv[1],
+      mode: 'api' as const,
+    });
+  }
+  if (
+    argv.length === 3 &&
+    argv[0] === '--cutover-probe' &&
+    argv[1] === '--config' &&
+    argv[2]
+  ) {
+    return Object.freeze({
+      configFilePath: argv[2],
+      mode: 'cutover_probe' as const,
+    });
+  }
+  return null;
+}

packages/ql3-local-api/src/production-process/cutoverProbeProcess.ts

@@ -0,0 +1,72 @@
+import {
+  runProductionLocalApplicationCutoverProbe,
+  type ProductionLocalApplicationCutoverProbeOptions,
+} from '@qinglong/local-application/cutover-probe';
+
+import {
+  readLocalApiProcessConfig,
+  type LocalApiProcessConfig,
+} from './config';
+
+export type ProductionLocalApiCutoverProbeOptions =
+  ProductionLocalApplicationCutoverProbeOptions;
+
+export interface ProductionLocalApiCutoverProbeAdapters {
+  readonly readConfig: typeof readLocalApiProcessConfig;
+  readonly runApplicationProbe: typeof runProductionLocalApplicationCutoverProbe;
+}
+
+function validateOptions(options: ProductionLocalApiCutoverProbeOptions): void {
+  if (
+    !options ||
+    typeof options !== 'object' ||
+    Array.isArray(options) ||
+    typeof options.configFilePath !== 'string' ||
+    typeof options.signals?.subscribe !== 'function' ||
+    typeof options.emit !== 'function'
+  ) {
+    throw new TypeError(
+      'Production Local API cutover probe options are invalid',
+    );
+  }
+}
+
+function validateAdapters(
+  adapters: ProductionLocalApiCutoverProbeAdapters,
+): void {
+  if (
+    !adapters ||
+    typeof adapters !== 'object' ||
+    Array.isArray(adapters) ||
+    typeof adapters.readConfig !== 'function' ||
+    typeof adapters.runApplicationProbe !== 'function'
+  ) {
+    throw new TypeError(
+      'Production Local API cutover probe adapters are invalid',
+    );
+  }
+}
+
+/**
+ * Binds the exact Local API entry configuration to the read-only adopted
+ * Application probe. No listener, credential authority, scheduler, recovery
+ * or write-capable database connection is opened in this mode.
+ */
+export async function runProductionLocalApiCutoverProbe(
+  options: ProductionLocalApiCutoverProbeOptions,
+  adapters: ProductionLocalApiCutoverProbeAdapters = {
+    readConfig: readLocalApiProcessConfig,
+    runApplicationProbe: runProductionLocalApplicationCutoverProbe,
+  },
+): Promise<'stopped'> {
+  validateOptions(options);
+  validateAdapters(adapters);
+  const config: Readonly<LocalApiProcessConfig> = adapters.readConfig(
+    options.configFilePath,
+  );
+  return adapters.runApplicationProbe({
+    configFilePath: config.applicationConfigFilePath,
+    signals: options.signals,
+    emit: options.emit,
+  });
+}