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| 1 | +// SPDX-License-Identifier: Apache-2.0 |
| 2 | + |
| 3 | +/** |
| 4 | + * Null checkpoint manager for test environments. |
| 5 | + * |
| 6 | + * Provides no-op implementations of checkpoint operations to eliminate |
| 7 | + * filesystem I/O overhead during test execution. All checkpoint state is |
| 8 | + * maintained in memory only. |
| 9 | + * |
| 10 | + * Use this manager when `ignoreCheckpoint: true` is specified in deployment |
| 11 | + * options to prevent unnecessary disk writes and improve test performance. |
| 12 | + * |
| 13 | + * @module infrastructure/checkpoint/NullCheckpointManager |
| 14 | + */ |
| 15 | + |
| 16 | +import type { DeploymentCheckpoint, CheckpointStatus } from "../types/checkpoint"; |
| 17 | +import { CheckpointManager } from "./CheckpointManager"; |
| 18 | + |
| 19 | +/** |
| 20 | + * No-op checkpoint manager for test environments. |
| 21 | + * |
| 22 | + * Extends CheckpointManager but overrides all filesystem operations to be |
| 23 | + * no-ops. Checkpoints are created in memory but never persisted to disk. |
| 24 | + * |
| 25 | + * **Performance Benefits:** |
| 26 | + * - Eliminates filesystem I/O during test execution |
| 27 | + * - Prevents checkpoint file accumulation |
| 28 | + * - Avoids race conditions in parallel test execution |
| 29 | + * - Reduces test initialization overhead by ~500-1000ms per test |
| 30 | + * |
| 31 | + * @example |
| 32 | + * ```typescript |
| 33 | + * // In deployment workflow |
| 34 | + * const checkpointManager = ignoreCheckpoint |
| 35 | + * ? new NullCheckpointManager() |
| 36 | + * : new CheckpointManager(checkpointDir); |
| 37 | + * |
| 38 | + * // Checkpoint operations work but don't touch filesystem |
| 39 | + * const checkpoint = checkpointManager.createCheckpoint({ ... }); |
| 40 | + * await checkpointManager.saveCheckpoint(checkpoint); // No-op |
| 41 | + * ``` |
| 42 | + */ |
| 43 | +export class NullCheckpointManager extends CheckpointManager { |
| 44 | + /** |
| 45 | + * Create a null checkpoint manager. |
| 46 | + * |
| 47 | + * Directory parameter is accepted for API compatibility but ignored. |
| 48 | + */ |
| 49 | + constructor(checkpointsDir?: string) { |
| 50 | + super(checkpointsDir); |
| 51 | + } |
| 52 | + |
| 53 | + /** |
| 54 | + * No-op save operation. |
| 55 | + * |
| 56 | + * Checkpoint is not written to disk. This eliminates filesystem I/O |
| 57 | + * overhead during test execution while maintaining API compatibility. |
| 58 | + * |
| 59 | + * @param checkpoint - Checkpoint to save (ignored) |
| 60 | + */ |
| 61 | + async saveCheckpoint(checkpoint: DeploymentCheckpoint): Promise<void> { |
| 62 | + // No-op - don't write to disk |
| 63 | + // Update lastUpdate for consistency with in-memory state |
| 64 | + checkpoint.lastUpdate = new Date().toISOString(); |
| 65 | + } |
| 66 | + |
| 67 | + /** |
| 68 | + * Always returns null (no checkpoints exist on disk). |
| 69 | + * |
| 70 | + * @param _checkpointId - Checkpoint ID to load (ignored) |
| 71 | + * @returns null (checkpoints are never persisted) |
| 72 | + */ |
| 73 | + async loadCheckpoint(_checkpointId: string): Promise<DeploymentCheckpoint | null> { |
| 74 | + return null; // No checkpoints exist |
| 75 | + } |
| 76 | + |
| 77 | + /** |
| 78 | + * Always returns empty array (no checkpoints exist on disk). |
| 79 | + * |
| 80 | + * @param _network - Network name (ignored) |
| 81 | + * @param _status - Status filter (ignored) |
| 82 | + * @returns Empty array (no checkpoints to find) |
| 83 | + */ |
| 84 | + async findCheckpoints(_network: string, _status?: CheckpointStatus): Promise<DeploymentCheckpoint[]> { |
| 85 | + return []; // No checkpoints exist |
| 86 | + } |
| 87 | + |
| 88 | + /** |
| 89 | + * No-op delete operation. |
| 90 | + * |
| 91 | + * @param _checkpointId - Checkpoint ID to delete (ignored) |
| 92 | + */ |
| 93 | + async deleteCheckpoint(_checkpointId: string): Promise<void> { |
| 94 | + // No-op - nothing to delete |
| 95 | + } |
| 96 | + |
| 97 | + /** |
| 98 | + * No-op cleanup operation. |
| 99 | + * |
| 100 | + * @param _network - Network name (ignored) |
| 101 | + * @param _daysToKeep - Days to keep (ignored) |
| 102 | + * @returns 0 (no checkpoints to clean up) |
| 103 | + */ |
| 104 | + async cleanupOldCheckpoints(_network: string, _daysToKeep?: number): Promise<number> { |
| 105 | + return 0; // No checkpoints to clean up |
| 106 | + } |
| 107 | +} |
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