ionic-orm-3/dist/src/query-runner/QueryRunnerProvider.js

Data-mapper ORM for Ionic WebSQL and SQLite

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/**
 * Represents functionality to provide a new query runners, and release old ones.
 * Also can provide always same query runner.
 */
var QueryRunnerProvider = (function () {
    // -------------------------------------------------------------------------
    // Constructor
    // -------------------------------------------------------------------------
    function QueryRunnerProvider(driver, useSingleQueryRunner) {
        if (useSingleQueryRunner === void 0) { useSingleQueryRunner = false; }
        this.driver = driver;
        this.useSingleQueryRunner = useSingleQueryRunner;
    }
    Object.defineProperty(QueryRunnerProvider.prototype, "isReleased", {
        // -------------------------------------------------------------------------
        // Accessors
        // -------------------------------------------------------------------------
        get: function () {
            return this._isReleased;
        },
        enumerable: true,
        configurable: true
    });
    // -------------------------------------------------------------------------
    // Public Methods
    // -------------------------------------------------------------------------
    /**
     * Provides a new query runner used to run repository queries.
     * If use useSingleQueryRunner mode is enabled then reusable query runner will be provided instead.
     */
    QueryRunnerProvider.prototype.provide = function () {
        return __awaiter(this, void 0, void 0, function () {
            var _a;
            return __generator(this, function (_b) {
                switch (_b.label) {
                    case 0:
                        if (!this.useSingleQueryRunner) return [3 /*break*/, 3];
                        if (!!this.reusableQueryRunner) return [3 /*break*/, 2];
                        _a = this;
                        return [4 /*yield*/, this.driver.createQueryRunner()];
                    case 1:
                        _a.reusableQueryRunner = _b.sent();
                        _b.label = 2;
                    case 2: return [2 /*return*/, this.reusableQueryRunner];
                    case 3: return [2 /*return*/, this.driver.createQueryRunner()];
                }
            });
        });
    };
    /**
     * Query runner release logic extracted into separated methods intently,
     * to make possible to create a subclass with its own release query runner logic.
     * Note: release only query runners that provided by a provideQueryRunner() method.
     * This is important and by design.
     */
    QueryRunnerProvider.prototype.release = function (queryRunner) {
        return __awaiter(this, void 0, void 0, function () {
            return __generator(this, function (_a) {
                if (queryRunner === this.reusableQueryRunner)
                    return [2 /*return*/];
                return [2 /*return*/, queryRunner.release()];
            });
        });
    };
    /**
     * Releases reused query runner.
     */
    QueryRunnerProvider.prototype.releaseReused = function () {
        return __awaiter(this, void 0, void 0, function () {
            return __generator(this, function (_a) {
                this._isReleased = true;
                if (this.reusableQueryRunner)
                    return [2 /*return*/, this.reusableQueryRunner.release()];
                return [2 /*return*/];
            });
        });
    };
    return QueryRunnerProvider;
}());
export { QueryRunnerProvider };
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