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Allow to specify prefix for value #281

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Allow to specify prefix for value #281

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8 changes: 7 additions & 1 deletion src/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -100,6 +100,7 @@ export interface Settings {
readonly retryDelay: number;
readonly retryJitter: number;
readonly automaticExtensionThreshold: number;
readonly valuePrefix: string;
}

// Define default settings.
Expand All @@ -109,6 +110,7 @@ const defaultSettings: Readonly<Settings> = {
retryDelay: 200,
retryJitter: 100,
automaticExtensionThreshold: 500,
valuePrefix: '',
};

// Modifyng this object is forbidden.
Expand Down Expand Up @@ -232,6 +234,10 @@ export default class Redlock extends EventEmitter {
typeof settings.automaticExtensionThreshold === "number"
? settings.automaticExtensionThreshold
: defaultSettings.automaticExtensionThreshold,
valuePrefix:
typeof settings.valuePrefix === "string"
? settings.valuePrefix
: defaultSettings.valuePrefix,
};

// Use custom scripts and script modifiers.
Expand Down Expand Up @@ -303,7 +309,7 @@ export default class Redlock extends EventEmitter {
throw new Error("Duration must be an integer value in milliseconds.");
}

const value = this._random();
const value = (settings?.valuePrefix ?? this.settings.valuePrefix) + this._random();

try {
const { attempts, start } = await this._execute(
Expand Down