138 lines
5 KiB
JavaScript
138 lines
5 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.isTransactionCommand = exports.Transaction = exports.TxnState = void 0;
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const error_1 = require("./error");
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const read_concern_1 = require("./read_concern");
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const read_preference_1 = require("./read_preference");
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const write_concern_1 = require("./write_concern");
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/** @internal */
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exports.TxnState = Object.freeze({
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NO_TRANSACTION: 'NO_TRANSACTION',
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STARTING_TRANSACTION: 'STARTING_TRANSACTION',
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TRANSACTION_IN_PROGRESS: 'TRANSACTION_IN_PROGRESS',
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TRANSACTION_COMMITTED: 'TRANSACTION_COMMITTED',
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TRANSACTION_COMMITTED_EMPTY: 'TRANSACTION_COMMITTED_EMPTY',
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TRANSACTION_ABORTED: 'TRANSACTION_ABORTED'
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});
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const stateMachine = {
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[exports.TxnState.NO_TRANSACTION]: [exports.TxnState.NO_TRANSACTION, exports.TxnState.STARTING_TRANSACTION],
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[exports.TxnState.STARTING_TRANSACTION]: [
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exports.TxnState.TRANSACTION_IN_PROGRESS,
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exports.TxnState.TRANSACTION_COMMITTED,
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exports.TxnState.TRANSACTION_COMMITTED_EMPTY,
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exports.TxnState.TRANSACTION_ABORTED
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],
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[exports.TxnState.TRANSACTION_IN_PROGRESS]: [
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exports.TxnState.TRANSACTION_IN_PROGRESS,
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exports.TxnState.TRANSACTION_COMMITTED,
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exports.TxnState.TRANSACTION_ABORTED
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],
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[exports.TxnState.TRANSACTION_COMMITTED]: [
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exports.TxnState.TRANSACTION_COMMITTED,
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exports.TxnState.TRANSACTION_COMMITTED_EMPTY,
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exports.TxnState.STARTING_TRANSACTION,
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exports.TxnState.NO_TRANSACTION
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],
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[exports.TxnState.TRANSACTION_ABORTED]: [exports.TxnState.STARTING_TRANSACTION, exports.TxnState.NO_TRANSACTION],
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[exports.TxnState.TRANSACTION_COMMITTED_EMPTY]: [
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exports.TxnState.TRANSACTION_COMMITTED_EMPTY,
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exports.TxnState.NO_TRANSACTION
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]
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};
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const ACTIVE_STATES = new Set([
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exports.TxnState.STARTING_TRANSACTION,
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exports.TxnState.TRANSACTION_IN_PROGRESS
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]);
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const COMMITTED_STATES = new Set([
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exports.TxnState.TRANSACTION_COMMITTED,
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exports.TxnState.TRANSACTION_COMMITTED_EMPTY,
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exports.TxnState.TRANSACTION_ABORTED
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]);
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/**
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* @public
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* A class maintaining state related to a server transaction. Internal Only
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*/
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class Transaction {
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/** Create a transaction @internal */
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constructor(options) {
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options = options !== null && options !== void 0 ? options : {};
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this.state = exports.TxnState.NO_TRANSACTION;
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this.options = {};
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const writeConcern = write_concern_1.WriteConcern.fromOptions(options);
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if (writeConcern) {
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if (writeConcern.w === 0) {
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throw new error_1.MongoTransactionError('Transactions do not support unacknowledged write concern');
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}
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this.options.writeConcern = writeConcern;
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}
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if (options.readConcern) {
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this.options.readConcern = read_concern_1.ReadConcern.fromOptions(options);
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}
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if (options.readPreference) {
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this.options.readPreference = read_preference_1.ReadPreference.fromOptions(options);
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}
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if (options.maxCommitTimeMS) {
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this.options.maxTimeMS = options.maxCommitTimeMS;
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}
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// TODO: This isn't technically necessary
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this._pinnedServer = undefined;
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this._recoveryToken = undefined;
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}
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/** @internal */
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get server() {
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return this._pinnedServer;
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}
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get recoveryToken() {
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return this._recoveryToken;
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}
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get isPinned() {
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return !!this.server;
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}
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/** @returns Whether the transaction has started */
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get isStarting() {
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return this.state === exports.TxnState.STARTING_TRANSACTION;
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}
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/**
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* @returns Whether this session is presently in a transaction
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*/
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get isActive() {
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return ACTIVE_STATES.has(this.state);
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}
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get isCommitted() {
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return COMMITTED_STATES.has(this.state);
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}
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/**
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* Transition the transaction in the state machine
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* @internal
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* @param nextState - The new state to transition to
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*/
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transition(nextState) {
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const nextStates = stateMachine[this.state];
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if (nextStates && nextStates.includes(nextState)) {
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this.state = nextState;
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if (this.state === exports.TxnState.NO_TRANSACTION ||
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this.state === exports.TxnState.STARTING_TRANSACTION ||
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this.state === exports.TxnState.TRANSACTION_ABORTED) {
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this.unpinServer();
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}
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return;
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}
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throw new error_1.MongoRuntimeError(`Attempted illegal state transition from [${this.state}] to [${nextState}]`);
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}
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/** @internal */
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pinServer(server) {
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if (this.isActive) {
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this._pinnedServer = server;
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}
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}
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/** @internal */
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unpinServer() {
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this._pinnedServer = undefined;
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}
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}
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exports.Transaction = Transaction;
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function isTransactionCommand(command) {
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return !!(command.commitTransaction || command.abortTransaction);
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}
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exports.isTransactionCommand = isTransactionCommand;
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//# sourceMappingURL=transactions.js.map
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