fp-ts-pool/build/cjs/withPool.js

Generic Resource Pool for fp-ts

"use strict";
var __assign = (this && this.__assign) || function () {
    __assign = Object.assign || function(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
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};
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
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var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
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}) : function(o, v) {
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});
var __importStar = (this && this.__importStar) || (function () {
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        ownKeys = Object.getOwnPropertyNames || function (o) {
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})();
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g = Object.create((typeof Iterator === "function" ? Iterator : Object).prototype);
    return g.next = verb(0), g["throw"] = verb(1), g["return"] = verb(2), typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
    function verb(n) { return function (v) { return step([n, v]); }; }
    function step(op) {
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            if (y = 0, t) op = [op[0] & 2, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
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        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
var __rest = (this && this.__rest) || function (s, e) {
    var t = {};
    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
        t[p] = s[p];
    if (s != null && typeof Object.getOwnPropertySymbols === "function")
        for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
            if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
                t[p[i]] = s[p[i]];
        }
    return t;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.withPool = withPool;
var fp_ts_bracket_1 = require("fp-ts-bracket");
var E = __importStar(require("fp-ts/lib/Either"));
var function_1 = require("fp-ts/lib/function");
var TE = __importStar(require("fp-ts/lib/TaskEither"));
var tarn_1 = require("tarn");
var TaskEither_1 = require("./TaskEither");
function withPool(_a) {
    var _this = this;
    var create = _a.create, destroy = _a.destroy, validate = _a.validate, moreOptions = __rest(_a, ["create", "destroy", "validate"]);
    var options = __assign(__assign({}, moreOptions), { create: function () {
            return (0, function_1.pipe)(create(), TaskEither_1.toPromise);
        }, destroy: function (client) {
            return (0, function_1.pipe)(client, destroy, TaskEither_1.toPromise);
        } });
    if (validate) {
        // waiting for fix for types
        options.validate = function (client) {
            return (0, function_1.pipe)(client, validate, TaskEither_1.toPromise);
        };
    }
    var aquirePool = function () {
        return (0, function_1.pipe)(E.tryCatch(function () { return new tarn_1.Pool(options); }, E.toError), function (e) { return Promise.resolve(e); });
    };
    var releasePool = function (pool) {
        return TE.tryCatch(function () { return __awaiter(_this, void 0, void 0, function () {
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0: return [4 /*yield*/, pool.destroy()];
                    case 1:
                        _a.sent();
                        return [2 /*return*/];
                }
            });
        }); }, E.toError);
    };
    var withPool = fp_ts_bracket_1.Bracket.Bracket(aquirePool, releasePool);
    return function (fn) {
        return (0, function_1.pipe)(withPool, fp_ts_bracket_1.Bracket.use(function (pool) {
            var acquire = function () {
                return fp_ts_bracket_1.Bracket.Bracket(TE.tryCatch(function () { return pool.acquire().promise; }, E.toError), function (resource) {
                    return (0, function_1.pipe)(E.tryCatch(function () { return pool.release(resource); }, E.toError), TE.fromEither, TE.asUnit);
                });
            };
            return fn(acquire);
        }));
    };
}