unleash-server
Version:
Unleash is an enterprise ready feature flag service. It provides different strategies for handling feature flags.
51 lines • 1.98 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.UPDATE_REVISION = void 0;
const events_1 = __importDefault(require("events"));
exports.UPDATE_REVISION = 'UPDATE_REVISION';
class ConfigurationRevisionService extends events_1.default {
constructor({ eventStore }, { getLogger, flagResolver, }) {
super();
this.logger = getLogger('configuration-revision-service.ts');
this.eventStore = eventStore;
this.flagResolver = flagResolver;
this.revisionId = 0;
}
static getInstance({ eventStore }, { getLogger, flagResolver, }) {
if (!ConfigurationRevisionService.instance) {
ConfigurationRevisionService.instance =
new ConfigurationRevisionService({ eventStore }, { getLogger, flagResolver });
}
return ConfigurationRevisionService.instance;
}
async getMaxRevisionId() {
if (this.revisionId > 0) {
return this.revisionId;
}
else {
return this.updateMaxRevisionId();
}
}
async updateMaxRevisionId(emit = true) {
if (this.flagResolver.isEnabled('disableUpdateMaxRevisionId')) {
return 0;
}
const revisionId = await this.eventStore.getMaxRevisionId(this.revisionId);
if (this.revisionId !== revisionId) {
this.logger.debug('Updating feature configuration with new revision Id', revisionId);
this.revisionId = revisionId;
if (emit) {
this.emit(exports.UPDATE_REVISION, revisionId);
}
}
return this.revisionId;
}
destroy() {
ConfigurationRevisionService.instance?.removeAllListeners();
}
}
exports.default = ConfigurationRevisionService;
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