@microfleet/core
Version:
Abstract microservice core
85 lines • 3.05 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.attach = exports.priority = exports.type = exports.name = void 0;
const assert = require("assert");
const Bluebird = require("bluebird");
const _debug = require("debug");
const __1 = require("../");
const require_1 = require("../utils/require");
const constants_1 = require("./redis/constants");
const common_errors_1 = require("common-errors");
const migrate_1 = require("./redis/migrate");
const utils_1 = require("./redis/utils");
const debug = _debug('mservice:redisSentinel');
/**
* Plugin name.
*/
exports.name = 'redis';
/**
* Plugin type.
*/
exports.type = __1.PluginTypes.database;
/**
* Relative priority inside the same plugin group type
*/
exports.priority = 0;
/**
* Attaches Redis Sentinel plugin.
* @param [conf={}] - Configuration for Redis Sentinel Connection.
* @returns Connections and Destructors.
*/
function attach(opts = {}) {
const Redis = require_1.default('ioredis');
assert(this.hasPlugin('validator'), new common_errors_1.NotFoundError('validator module must be included'));
Redis.Promise = Bluebird;
const isRedisStarted = utils_1.isStarted(this, Redis);
const conf = this.validator.ifError('redisSentinel', opts);
this.redisType = constants_1.REDIS_TYPE_SENTINEL;
return {
/**
* @private
* @returns Opens connection to Redis.
*/
async connect() {
assert(this.redis == null, constants_1.ERROR_ALREADY_STARTED);
const instance = new Redis({
lazyConnect: true,
name: conf.name,
sentinels: conf.sentinels,
...conf.options,
});
if (this.tracer) {
const applyInstrumentation = require_1.default('opentracing-js-ioredis');
applyInstrumentation(this.tracer, instance);
}
// attach to instance right away
if (conf.luaScripts) {
debug('attaching lua');
await utils_1.loadLuaScripts(this, conf.luaScripts, instance);
}
await instance.connect();
this.addMigrator('redis', migrate_1.default, instance, this);
this.redis = instance;
this.redisDuplicate = () => instance.duplicate();
this.emit('plugin:connect:redisSentinel', instance);
return instance;
},
/**
* @returns Returns current status of redis sentinel.
*/
status: utils_1.hasConnection.bind(this, isRedisStarted),
/**
* @returns Closes redis connection.
*/
async close() {
assert(isRedisStarted(), constants_1.ERROR_NOT_STARTED);
await this.redis
.quit()
.catchReturn({ message: 'Connection is closed.' }, null);
this.redis = null;
this.emit('plugin:close:redisSentinel');
},
};
}
exports.attach = attach;
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