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c27c3eee JB |
1 | // Copyright Jerome Benoit. 2021. All Rights Reserved. |
2 | ||
a95873d8 | 3 | import { FileType } from '../../types/FileType'; |
a6b3c6c3 | 4 | import FileUtils from '../../utils/FileUtils'; |
72f041bd JB |
5 | import Statistics from '../../types/Statistics'; |
6 | import { Storage } from './Storage'; | |
7 | import fs from 'fs'; | |
c63c21bc | 8 | import lockfile from 'proper-lockfile'; |
72f041bd | 9 | |
100a5301 | 10 | export class JsonFileStorage extends Storage { |
2a370053 JB |
11 | private fd: number | null = null; |
12 | ||
1f5df42a JB |
13 | constructor(storageUri: string, logPrefix: string) { |
14 | super(storageUri, logPrefix); | |
15 | this.dbName = this.storageUri.pathname; | |
72f041bd JB |
16 | } |
17 | ||
18 | public storePerformanceStatistics(performanceStatistics: Statistics): void { | |
2a370053 | 19 | this.checkPerformanceRecordsFile(); |
e7aeea18 JB |
20 | lockfile |
21 | .lock(this.dbName, { stale: 5000, retries: 3 }) | |
c63c21bc JB |
22 | .then(async (release) => { |
23 | try { | |
24 | const fileData = fs.readFileSync(this.dbName, 'utf8'); | |
e7aeea18 JB |
25 | const performanceRecords: Statistics[] = fileData |
26 | ? (JSON.parse(fileData) as Statistics[]) | |
27 | : []; | |
c63c21bc | 28 | performanceRecords.push(performanceStatistics); |
1830ad42 JB |
29 | fs.writeFileSync( |
30 | this.dbName, | |
e7aeea18 JB |
31 | JSON.stringify( |
32 | performanceRecords, | |
ff4b895e JB |
33 | (key, value) => { |
34 | if (value instanceof Map) { | |
35 | return { | |
36 | dataType: 'Map', | |
e7aeea18 | 37 | value: [...value], |
ff4b895e JB |
38 | }; |
39 | } | |
40 | return value as Statistics; | |
41 | }, | |
e7aeea18 JB |
42 | 2 |
43 | ), | |
1830ad42 JB |
44 | 'utf8' |
45 | ); | |
c63c21bc | 46 | } catch (error) { |
e7aeea18 JB |
47 | FileUtils.handleFileException( |
48 | this.logPrefix, | |
a95873d8 | 49 | FileType.PerformanceRecords, |
e7aeea18 JB |
50 | this.dbName, |
51 | error as NodeJS.ErrnoException | |
52 | ); | |
c63c21bc JB |
53 | } |
54 | await release(); | |
55 | }) | |
e7aeea18 JB |
56 | .catch(() => { |
57 | /* This is intentional */ | |
58 | }); | |
72f041bd | 59 | } |
b652b0c3 | 60 | |
2a370053 | 61 | public open(): void { |
b652b0c3 | 62 | try { |
a6ceb16a JB |
63 | if (!this?.fd) { |
64 | this.fd = fs.openSync(this.dbName, 'a+'); | |
65 | } | |
b652b0c3 | 66 | } catch (error) { |
e7aeea18 JB |
67 | FileUtils.handleFileException( |
68 | this.logPrefix, | |
a95873d8 | 69 | FileType.PerformanceRecords, |
e7aeea18 JB |
70 | this.dbName, |
71 | error as NodeJS.ErrnoException | |
72 | ); | |
2a370053 JB |
73 | } |
74 | } | |
75 | ||
76 | public close(): void { | |
77 | try { | |
a6ceb16a | 78 | if (this?.fd) { |
2a370053 JB |
79 | fs.closeSync(this.fd); |
80 | this.fd = null; | |
81 | } | |
82 | } catch (error) { | |
e7aeea18 JB |
83 | FileUtils.handleFileException( |
84 | this.logPrefix, | |
a95873d8 | 85 | FileType.PerformanceRecords, |
e7aeea18 JB |
86 | this.dbName, |
87 | error as NodeJS.ErrnoException | |
88 | ); | |
2a370053 JB |
89 | } |
90 | } | |
91 | ||
92 | private checkPerformanceRecordsFile(): void { | |
73d09045 | 93 | if (!this?.fd) { |
e7aeea18 JB |
94 | throw new Error( |
95 | `${this.logPrefix} Performance records '${this.dbName}' file descriptor not found` | |
96 | ); | |
b652b0c3 JB |
97 | } |
98 | } | |
72f041bd | 99 | } |