redis-smq
Version:
A simple high-performance Redis message queue for Node.js.
68 lines • 2.58 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.RedisClient = void 0;
const redis_smq_common_1 = require("redis-smq-common");
const index_js_1 = require("../../config/index.js");
const redis_client_instance_lock_error_js_1 = require("./errors/redis-client-instance-lock.error.js");
const scripts_js_1 = require("./scripts/scripts.js");
class RedisClient extends redis_smq_common_1.EventEmitter {
constructor() {
super(...arguments);
this.instance = null;
this.locked = false;
this.init = (cb) => {
this.getSetInstance((err) => cb(err));
};
this.getSetInstance = (cb) => {
if (!this.locked) {
if (!this.instance) {
this.locked = true;
this.createClient(index_js_1.Configuration.getSetConfig().redis, (err, client) => {
this.locked = false;
if (err)
return cb(err);
if (!client)
return cb(new redis_smq_common_1.CallbackEmptyReplyError());
this.instance = client;
this.instance.on('error', (err) => this.emit('error', err));
cb(null, this.instance);
});
}
else
cb(null, this.instance);
}
else
cb(new redis_client_instance_lock_error_js_1.RedisClientInstanceLockError());
};
this.shutdown = (cb) => {
if (this.instance) {
this.instance.halt(() => {
this.instance = null;
cb();
});
}
else
cb();
};
}
createClient(config, cb) {
(0, redis_smq_common_1.createRedisClient)(config, (err, client) => {
if (err)
return cb(err);
if (!client)
return cb(new redis_smq_common_1.CallbackEmptyReplyError());
(0, scripts_js_1.loadScriptFiles)(client, (err) => {
if (err)
return cb(err);
cb(null, client);
});
});
}
getInstance() {
if (!this.instance)
return new redis_smq_common_1.PanicError(`Use first getSetInstance() to initialize the RedisClientInstance class`);
return this.instance;
}
}
exports.RedisClient = RedisClient;
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