gverse
Version:
Object Graph Mapper for Dgraph
376 lines • 19.1 kB
JavaScript
"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
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;
return g = { next: verb(0), "throw": verb(1), "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) {
if (f) throw new TypeError("Generator is already executing.");
while (g && (g = 0, op[0] && (_ = 0)), _) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
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; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} 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 __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Transaction = void 0;
var dgraph = __importStar(require("dgraph-js"));
var debug_logger_1 = __importDefault(require("./debug-logger"));
var uuid_1 = require("uuid");
var retry_1 = require("./retry");
/** Represents a dgraph transaction that can be created on demand or explicitly. */
var Transaction = /** @class */ (function () {
function Transaction(connection, autoCommit, verifyConnection, readOnly) {
if (verifyConnection === void 0) { verifyConnection = false; }
if (readOnly === void 0) { readOnly = false; }
this.uuid = (0, uuid_1.v4)();
if (verifyConnection && !(connection === null || connection === void 0 ? void 0 : connection.verified)) {
var issue = "Can not create transaction. No verified connection.";
(0, debug_logger_1.default)(issue);
throw Error(issue);
}
this.connection = connection;
this.autoCommit = autoCommit;
this.txn = connection.client.newTxn({ readOnly: readOnly });
}
/** Commit the transaction and apply all operations. */
Transaction.prototype.commit = function () {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
// todo check if transaction already committed
return [4 /*yield*/, this.txn.commit()];
case 1:
// todo check if transaction already committed
_a.sent();
(0, debug_logger_1.default)("Transaction ".concat(this.uuid, " committed"));
return [2 /*return*/];
}
});
});
};
/** Discard all pending operations */
Transaction.prototype.discard = function () {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.txn.discard()];
case 1:
_a.sent();
(0, debug_logger_1.default)("Transaction ".concat(this.uuid, " aborted"));
return [2 /*return*/];
}
});
});
};
/** Returns object representation of the response JSON */
Transaction.prototype.query = function (query, variables, retries) {
if (retries === void 0) { retries = 0; }
return __awaiter(this, void 0, void 0, function () {
var res, _a, e_1;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
(0, debug_logger_1.default)("Transaction ".concat(this.uuid, " querying"), query, variables ? " (variables: ".concat(JSON.stringify(variables), ")") : "");
_b.label = 1;
case 1:
_b.trys.push([1, 6, , 10]);
if (!variables) return [3 /*break*/, 3];
return [4 /*yield*/, this.txn.queryWithVars(query, variables)];
case 2:
_a = _b.sent();
return [3 /*break*/, 5];
case 3: return [4 /*yield*/, this.txn.query(query)];
case 4:
_a = _b.sent();
_b.label = 5;
case 5:
res = _a;
(0, debug_logger_1.default)("Query response:", res.getJson());
return [2 /*return*/, res.getJson()];
case 6:
e_1 = _b.sent();
(0, debug_logger_1.default)(e_1);
try {
void this.txn.discard();
}
catch (e) {
(0, debug_logger_1.default)(e);
}
if (!(0, retry_1.shouldRetry)(e_1, retries)) return [3 /*break*/, 9];
this.txn = this.connection.client.newTxn({ readOnly: true });
return [4 /*yield*/, (0, retry_1.waitPromise)("query ".concat(query))];
case 7:
_b.sent();
return [4 /*yield*/, this.query(query, variables, retries + 1)];
case 8: return [2 /*return*/, _b.sent()];
case 9:
(0, debug_logger_1.default)("Failed to query:", query, "; error:", e_1);
throw Error(e_1);
case 10: return [2 /*return*/];
}
});
});
};
/** Mutate json-compliant object into graph space */
Transaction.prototype.mutate = function (values, retries) {
var _a;
if (retries === void 0) { retries = 0; }
return __awaiter(this, void 0, void 0, function () {
var mu, uidMap, updatedUid, e_2;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
(0, debug_logger_1.default)("Transaction ".concat(this.uuid, " mutating"), JSON.stringify(values));
_b.label = 1;
case 1:
_b.trys.push([1, 3, , 7]);
if (!values.uid) {
values.uid = "_:createdUid";
}
mu = new dgraph.Mutation();
mu.setCommitNow(this.autoCommit);
mu.setSetJson(values);
return [4 /*yield*/, this.txn.mutate(mu)];
case 2:
uidMap = _b.sent();
updatedUid = (_a = uidMap.getUidsMap().get("createdUid")) !== null && _a !== void 0 ? _a : values.uid;
if (!updatedUid) {
return [2 /*return*/, values.uid];
}
(0, debug_logger_1.default)("Transaction ".concat(this.uuid, " mutated with new uid"), updatedUid);
return [2 /*return*/, updatedUid];
case 3:
e_2 = _b.sent();
(0, debug_logger_1.default)(e_2);
try {
void this.txn.discard();
}
catch (e) {
(0, debug_logger_1.default)(e);
}
if (!(0, retry_1.shouldRetry)(e_2, retries)) return [3 /*break*/, 6];
this.txn = this.connection.client.newTxn();
return [4 /*yield*/, (0, retry_1.waitPromise)("mutate ".concat(JSON.stringify(values)))];
case 4:
_b.sent();
return [4 /*yield*/, this.mutate(values, retries + 1)];
case 5: return [2 /*return*/, _b.sent()];
case 6: throw Error(e_2);
case 7: return [2 /*return*/];
}
});
});
};
/** Run an RDF mutation set a single predicate */
Transaction.prototype.mutateNquads = function (subject, predicate, object) {
return __awaiter(this, void 0, void 0, function () {
var nquad, mu, assigned, e_3;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (object === null)
return [2 /*return*/];
nquad = "".concat(subject, " <").concat(predicate, "> ").concat(object, " .");
_a.label = 1;
case 1:
_a.trys.push([1, 3, , 4]);
(0, debug_logger_1.default)("Transaction ".concat(this.uuid, " mutating nquad: ").concat(nquad));
mu = new dgraph.Mutation();
mu.setCommitNow(this.autoCommit);
mu.setSetNquads(nquad);
return [4 /*yield*/, this.txn.mutate(mu)];
case 2:
assigned = _a.sent();
return [2 /*return*/, assigned.getUidsMap().get("blank-0")];
case 3:
e_3 = _a.sent();
(0, debug_logger_1.default)("Transaction ".concat(this.uuid, " mutating failed"), nquad, e_3);
void this.txn.discard();
throw Error(e_3);
case 4: return [2 /*return*/];
}
});
});
};
/** Run an RDF mutation to delete a single predicate */
Transaction.prototype.deleteNquads = function (subject, predicate, object) {
return __awaiter(this, void 0, void 0, function () {
var nquad, mu, assigned, e_4;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (object === null)
return [2 /*return*/];
nquad = "".concat(subject, " <").concat(predicate, "> ").concat(object, " .");
_a.label = 1;
case 1:
_a.trys.push([1, 3, , 4]);
(0, debug_logger_1.default)("Transaction ".concat(this.uuid, " deleting Nquad: ").concat(nquad));
mu = new dgraph.Mutation();
mu.setCommitNow(this.autoCommit);
mu.setDelNquads(nquad);
return [4 /*yield*/, this.txn.mutate(mu)];
case 2:
assigned = _a.sent();
return [2 /*return*/, assigned.getUidsMap().get("blank-0")];
case 3:
e_4 = _a.sent();
(0, debug_logger_1.default)("Transaction ".concat(this.uuid, " delete nquad failed"), nquad, e_4);
void this.txn.discard();
throw Error(e_4);
case 4: return [2 /*return*/];
}
});
});
};
/** Delete vertices with given values. Values should be a list
* of objects with uids or an object with uid.
*/
Transaction.prototype.delete = function (values, retries) {
if (retries === void 0) { retries = 0; }
return __awaiter(this, void 0, void 0, function () {
var mu, uid, e_5;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
(0, debug_logger_1.default)("Transaction ".concat(this.uuid, " deleting values"), values);
if (!values.uid && values.length < 1) {
(0, debug_logger_1.default)("Nothing to delete");
return [2 /*return*/];
}
_a.label = 1;
case 1:
_a.trys.push([1, 3, , 7]);
mu = new dgraph.Mutation();
mu.setCommitNow(this.autoCommit);
mu.setDeleteJson(values);
return [4 /*yield*/, this.txn.mutate(mu)];
case 2:
uid = _a.sent();
(0, debug_logger_1.default)("Transaction ".concat(this.uuid, " deleted"), uid);
return [2 /*return*/, uid.getUidsMap().get("blank-0")];
case 3:
e_5 = _a.sent();
(0, debug_logger_1.default)("Transaction ".concat(this.uuid, " delete failed"), values, e_5);
try {
void this.txn.discard();
}
catch (e) {
(0, debug_logger_1.default)(e);
}
if (!(0, retry_1.shouldRetry)(e_5, retries)) return [3 /*break*/, 6];
this.txn = this.connection.client.newTxn();
return [4 /*yield*/, (0, retry_1.waitPromise)("delete ".concat(JSON.stringify(values)))];
case 4:
_a.sent();
return [4 /*yield*/, this.query(values, retries + 1)];
case 5: return [2 /*return*/, _a.sent()];
case 6:
(0, debug_logger_1.default)("Failed to delete:", values, "; error:", e_5);
throw Error(e_5);
case 7: return [2 /*return*/];
}
});
});
};
/** Run upsert blocks in graph space */
Transaction.prototype.upsert = function (query, values, condition, retries) {
if (retries === void 0) { retries = 0; }
return __awaiter(this, void 0, void 0, function () {
var mu, req, e_6;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
(0, debug_logger_1.default)("Transaction ".concat(this.uuid, " running upsert"), query, JSON.stringify(values), condition !== null && condition !== void 0 ? condition : "");
_a.label = 1;
case 1:
_a.trys.push([1, 3, , 7]);
mu = new dgraph.Mutation();
mu.setSetJson(values);
if (condition)
mu.setCond("@if(".concat(condition, ")"));
req = new dgraph.Request();
req.setQuery("query ".concat(query));
req.setMutationsList([mu]);
req.setCommitNow(this.autoCommit);
return [4 /*yield*/, this.txn.doRequest(req)];
case 2:
_a.sent();
return [2 /*return*/, true];
case 3:
e_6 = _a.sent();
(0, debug_logger_1.default)(e_6);
try {
void this.txn.discard();
}
catch (e) {
(0, debug_logger_1.default)(e);
}
if (!(0, retry_1.shouldRetry)(e_6, retries)) return [3 /*break*/, 6];
this.txn = this.connection.client.newTxn();
return [4 /*yield*/, (0, retry_1.waitPromise)("upsert")];
case 4:
_a.sent();
return [4 /*yield*/, this.upsert(query, values, condition, retries + 1)];
case 5: return [2 /*return*/, _a.sent()];
case 6: throw Error(e_6);
case 7: return [2 /*return*/];
}
});
});
};
return Transaction;
}());
exports.Transaction = Transaction;
//# sourceMappingURL=transaction.js.map