937 lines
46 KiB
JavaScript
937 lines
46 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.ServerSessionPool = exports.ServerSession = exports.ClientSession = void 0;
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exports.maybeClearPinnedConnection = maybeClearPinnedConnection;
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exports.applySession = applySession;
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exports.updateSessionFromResponse = updateSessionFromResponse;
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const promises_1 = require("timers/promises");
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const bson_1 = require("./bson");
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const metrics_1 = require("./cmap/metrics");
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const constants_1 = require("./constants");
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const error_1 = require("./error");
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const mongo_types_1 = require("./mongo_types");
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const execute_operation_1 = require("./operations/execute_operation");
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const run_command_1 = require("./operations/run_command");
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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 common_1 = require("./sdam/common");
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const timeout_1 = require("./timeout");
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const transactions_1 = require("./transactions");
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const utils_1 = require("./utils");
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const write_concern_1 = require("./write_concern");
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/**
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* A class representing a client session on the server
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*
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* NOTE: not meant to be instantiated directly.
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* @public
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*/
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class ClientSession extends mongo_types_1.TypedEventEmitter {
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/**
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* Create a client session.
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* @internal
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* @param client - The current client
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* @param sessionPool - The server session pool (Internal Class)
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* @param options - Optional settings
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* @param clientOptions - Optional settings provided when creating a MongoClient
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*/
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constructor(client, sessionPool, options, clientOptions) {
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super();
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/** @internal */
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this.timeoutContext = null;
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this.on('error', utils_1.noop);
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if (client == null) {
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// TODO(NODE-3483)
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throw new error_1.MongoRuntimeError('ClientSession requires a MongoClient');
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}
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if (sessionPool == null || !(sessionPool instanceof ServerSessionPool)) {
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// TODO(NODE-3483)
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throw new error_1.MongoRuntimeError('ClientSession requires a ServerSessionPool');
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}
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options = options ?? {};
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this.snapshotEnabled = options.snapshot === true;
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if (options.causalConsistency === true && this.snapshotEnabled) {
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throw new error_1.MongoInvalidArgumentError('Properties "causalConsistency" and "snapshot" are mutually exclusive');
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}
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this.client = client;
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this.sessionPool = sessionPool;
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this.hasEnded = false;
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this.clientOptions = clientOptions;
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this.timeoutMS = options.defaultTimeoutMS ?? client.s.options?.timeoutMS;
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this.explicit = !!options.explicit;
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this._serverSession = this.explicit ? this.sessionPool.acquire() : null;
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this.txnNumberIncrement = 0;
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const defaultCausalConsistencyValue = this.explicit && options.snapshot !== true;
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this.supports = {
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// if we can enable causal consistency, do so by default
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causalConsistency: options.causalConsistency ?? defaultCausalConsistencyValue
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};
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this.clusterTime = options.initialClusterTime;
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this.operationTime = undefined;
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this.owner = options.owner;
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this.defaultTransactionOptions = { ...options.defaultTransactionOptions };
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this.transaction = new transactions_1.Transaction();
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}
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/** The server id associated with this session */
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get id() {
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return this.serverSession?.id;
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}
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get serverSession() {
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let serverSession = this._serverSession;
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if (serverSession == null) {
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if (this.explicit) {
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throw new error_1.MongoRuntimeError('Unexpected null serverSession for an explicit session');
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}
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if (this.hasEnded) {
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throw new error_1.MongoRuntimeError('Unexpected null serverSession for an ended implicit session');
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}
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serverSession = this.sessionPool.acquire();
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this._serverSession = serverSession;
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}
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return serverSession;
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}
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get loadBalanced() {
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return this.client.topology?.description.type === common_1.TopologyType.LoadBalanced;
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}
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/** @internal */
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pin(conn) {
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if (this.pinnedConnection) {
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throw TypeError('Cannot pin multiple connections to the same session');
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}
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this.pinnedConnection = conn;
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conn.emit(constants_1.PINNED, this.inTransaction() ? metrics_1.ConnectionPoolMetrics.TXN : metrics_1.ConnectionPoolMetrics.CURSOR);
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}
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/** @internal */
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unpin(options) {
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if (this.loadBalanced) {
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return maybeClearPinnedConnection(this, options);
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}
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this.transaction.unpinServer();
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}
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get isPinned() {
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return this.loadBalanced ? !!this.pinnedConnection : this.transaction.isPinned;
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}
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/**
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* Frees any client-side resources held by the current session. If a session is in a transaction,
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* the transaction is aborted.
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*
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* Does not end the session on the server.
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*
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* @param options - Optional settings. Currently reserved for future use
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*/
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async endSession(options) {
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try {
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if (this.inTransaction()) {
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await this.abortTransaction({ ...options, throwTimeout: true });
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}
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}
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catch (error) {
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// spec indicates that we should ignore all errors for `endSessions`
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if (error.name === 'MongoOperationTimeoutError')
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throw error;
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(0, utils_1.squashError)(error);
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}
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finally {
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if (!this.hasEnded) {
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const serverSession = this.serverSession;
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if (serverSession != null) {
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// release the server session back to the pool
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this.sessionPool.release(serverSession);
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// Store a clone of the server session for reference (debugging)
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this._serverSession = new ServerSession(serverSession);
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}
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// mark the session as ended, and emit a signal
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this.hasEnded = true;
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this.emit('ended', this);
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}
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maybeClearPinnedConnection(this, { force: true, ...options });
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}
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}
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/**
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* @experimental
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* An alias for {@link ClientSession.endSession|ClientSession.endSession()}.
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*/
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async [Symbol.asyncDispose]() {
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await this.endSession({ force: true });
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}
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/**
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* Advances the operationTime for a ClientSession.
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*
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* @param operationTime - the `BSON.Timestamp` of the operation type it is desired to advance to
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*/
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advanceOperationTime(operationTime) {
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if (this.operationTime == null) {
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this.operationTime = operationTime;
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return;
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}
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if (operationTime.greaterThan(this.operationTime)) {
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this.operationTime = operationTime;
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}
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}
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/**
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* Advances the clusterTime for a ClientSession to the provided clusterTime of another ClientSession
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*
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* @param clusterTime - the $clusterTime returned by the server from another session in the form of a document containing the `BSON.Timestamp` clusterTime and signature
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*/
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advanceClusterTime(clusterTime) {
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if (!clusterTime || typeof clusterTime !== 'object') {
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throw new error_1.MongoInvalidArgumentError('input cluster time must be an object');
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}
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if (!clusterTime.clusterTime || clusterTime.clusterTime._bsontype !== 'Timestamp') {
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throw new error_1.MongoInvalidArgumentError('input cluster time "clusterTime" property must be a valid BSON Timestamp');
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}
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if (!clusterTime.signature ||
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clusterTime.signature.hash?._bsontype !== 'Binary' ||
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(typeof clusterTime.signature.keyId !== 'bigint' &&
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typeof clusterTime.signature.keyId !== 'number' &&
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clusterTime.signature.keyId?._bsontype !== 'Long') // apparently we decode the key to number?
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) {
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throw new error_1.MongoInvalidArgumentError('input cluster time must have a valid "signature" property with BSON Binary hash and BSON Long keyId');
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}
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(0, common_1._advanceClusterTime)(this, clusterTime);
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}
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/**
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* Used to determine if this session equals another
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*
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* @param session - The session to compare to
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*/
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equals(session) {
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if (!(session instanceof ClientSession)) {
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return false;
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}
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if (this.id == null || session.id == null) {
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return false;
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}
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return bson_1.ByteUtils.equals(this.id.id.buffer, session.id.id.buffer);
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}
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/**
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* Increment the transaction number on the internal ServerSession
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*
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* @privateRemarks
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* This helper increments a value stored on the client session that will be
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* added to the serverSession's txnNumber upon applying it to a command.
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* This is because the serverSession is lazily acquired after a connection is obtained
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*/
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incrementTransactionNumber() {
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this.txnNumberIncrement += 1;
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}
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/** @returns whether this session is currently in a transaction or not */
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inTransaction() {
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return this.transaction.isActive;
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}
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/**
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* Starts a new transaction with the given options.
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*
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* @remarks
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* **IMPORTANT**: Running operations in parallel is not supported during a transaction. The use of `Promise.all`,
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* `Promise.allSettled`, `Promise.race`, etc to parallelize operations inside a transaction is
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* undefined behaviour.
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*
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* @param options - Options for the transaction
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*/
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startTransaction(options) {
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if (this.snapshotEnabled) {
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throw new error_1.MongoCompatibilityError('Transactions are not supported in snapshot sessions');
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}
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if (this.inTransaction()) {
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throw new error_1.MongoTransactionError('Transaction already in progress');
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}
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if (this.isPinned && this.transaction.isCommitted) {
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this.unpin();
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}
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this.commitAttempted = false;
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// increment txnNumber
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this.incrementTransactionNumber();
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// create transaction state
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this.transaction = new transactions_1.Transaction({
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readConcern: options?.readConcern ??
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this.defaultTransactionOptions.readConcern ??
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this.clientOptions?.readConcern,
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writeConcern: options?.writeConcern ??
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this.defaultTransactionOptions.writeConcern ??
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this.clientOptions?.writeConcern,
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readPreference: options?.readPreference ??
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this.defaultTransactionOptions.readPreference ??
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this.clientOptions?.readPreference,
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maxCommitTimeMS: options?.maxCommitTimeMS ?? this.defaultTransactionOptions.maxCommitTimeMS
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});
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this.transaction.transition(transactions_1.TxnState.STARTING_TRANSACTION);
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}
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/**
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* Commits the currently active transaction in this session.
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*
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* @param options - Optional options, can be used to override `defaultTimeoutMS`.
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*/
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async commitTransaction(options) {
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if (this.transaction.state === transactions_1.TxnState.NO_TRANSACTION) {
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throw new error_1.MongoTransactionError('No transaction started');
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}
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if (this.transaction.state === transactions_1.TxnState.STARTING_TRANSACTION ||
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this.transaction.state === transactions_1.TxnState.TRANSACTION_COMMITTED_EMPTY) {
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// the transaction was never started, we can safely exit here
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this.transaction.transition(transactions_1.TxnState.TRANSACTION_COMMITTED_EMPTY);
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return;
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}
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if (this.transaction.state === transactions_1.TxnState.TRANSACTION_ABORTED) {
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throw new error_1.MongoTransactionError('Cannot call commitTransaction after calling abortTransaction');
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}
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const command = { commitTransaction: 1 };
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const timeoutMS = typeof options?.timeoutMS === 'number'
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? options.timeoutMS
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: typeof this.timeoutMS === 'number'
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? this.timeoutMS
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: null;
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const wc = this.transaction.options.writeConcern ?? this.clientOptions?.writeConcern;
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if (wc != null) {
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if (timeoutMS == null && this.timeoutContext == null) {
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write_concern_1.WriteConcern.apply(command, { wtimeoutMS: 10000, w: 'majority', ...wc });
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}
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else {
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const wcKeys = Object.keys(wc);
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if (wcKeys.length > 2 || (!wcKeys.includes('wtimeoutMS') && !wcKeys.includes('wTimeoutMS')))
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// if the write concern was specified with wTimeoutMS, then we set both wtimeoutMS
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// and wTimeoutMS, guaranteeing at least two keys, so if we have more than two keys,
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// then we can automatically assume that we should add the write concern to the command.
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// If it has 2 or fewer keys, we need to check that those keys aren't the wtimeoutMS
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// or wTimeoutMS options before we add the write concern to the command
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write_concern_1.WriteConcern.apply(command, { ...wc, wtimeoutMS: undefined });
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}
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}
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if (this.transaction.state === transactions_1.TxnState.TRANSACTION_COMMITTED || this.commitAttempted) {
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if (timeoutMS == null && this.timeoutContext == null) {
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write_concern_1.WriteConcern.apply(command, { wtimeoutMS: 10000, ...wc, w: 'majority' });
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}
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else {
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write_concern_1.WriteConcern.apply(command, { w: 'majority', ...wc, wtimeoutMS: undefined });
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}
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}
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if (typeof this.transaction.options.maxTimeMS === 'number') {
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command.maxTimeMS = this.transaction.options.maxTimeMS;
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}
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if (this.transaction.recoveryToken) {
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command.recoveryToken = this.transaction.recoveryToken;
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}
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const operation = new run_command_1.RunCommandOperation(new utils_1.MongoDBNamespace('admin'), command, {
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session: this,
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readPreference: read_preference_1.ReadPreference.primary,
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bypassPinningCheck: true
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});
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operation.maxAttempts = this.clientOptions.maxAdaptiveRetries + 1;
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const timeoutContext = this.timeoutContext ??
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(typeof timeoutMS === 'number'
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? timeout_1.TimeoutContext.create({
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serverSelectionTimeoutMS: this.clientOptions.serverSelectionTimeoutMS,
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socketTimeoutMS: this.clientOptions.socketTimeoutMS,
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timeoutMS
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})
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: null);
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try {
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await (0, execute_operation_1.executeOperation)(this.client, operation, timeoutContext);
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this.commitAttempted = undefined;
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return;
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}
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catch (firstCommitError) {
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this.commitAttempted = true;
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const remainingAttempts = this.clientOptions.maxAdaptiveRetries + 1 - operation.attemptsMade;
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if (remainingAttempts <= 0) {
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throw firstCommitError;
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}
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if (firstCommitError instanceof error_1.MongoError && (0, error_1.isRetryableWriteError)(firstCommitError)) {
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// SPEC-1185: apply majority write concern when retrying commitTransaction
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write_concern_1.WriteConcern.apply(command, { wtimeoutMS: 10000, ...wc, w: 'majority' });
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// per txns spec, must unpin session in this case
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this.unpin({ force: true });
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try {
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const op = new run_command_1.RunCommandOperation(new utils_1.MongoDBNamespace('admin'), command, {
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session: this,
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readPreference: read_preference_1.ReadPreference.primary,
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bypassPinningCheck: true
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});
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op.maxAttempts = remainingAttempts;
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await (0, execute_operation_1.executeOperation)(this.client, op, timeoutContext);
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return;
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}
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catch (retryCommitError) {
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// If the retry failed, we process that error instead of the original
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if (shouldAddUnknownTransactionCommitResultLabel(retryCommitError)) {
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retryCommitError.addErrorLabel(error_1.MongoErrorLabel.UnknownTransactionCommitResult);
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}
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if (shouldUnpinAfterCommitError(retryCommitError)) {
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this.unpin({ error: retryCommitError });
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}
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throw retryCommitError;
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}
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}
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if (shouldAddUnknownTransactionCommitResultLabel(firstCommitError)) {
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firstCommitError.addErrorLabel(error_1.MongoErrorLabel.UnknownTransactionCommitResult);
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}
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if (shouldUnpinAfterCommitError(firstCommitError)) {
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this.unpin({ error: firstCommitError });
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}
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throw firstCommitError;
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}
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finally {
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this.transaction.transition(transactions_1.TxnState.TRANSACTION_COMMITTED);
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}
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}
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async abortTransaction(options) {
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if (this.transaction.state === transactions_1.TxnState.NO_TRANSACTION) {
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throw new error_1.MongoTransactionError('No transaction started');
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}
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if (this.transaction.state === transactions_1.TxnState.STARTING_TRANSACTION) {
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// the transaction was never started, we can safely exit here
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this.transaction.transition(transactions_1.TxnState.TRANSACTION_ABORTED);
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return;
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}
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if (this.transaction.state === transactions_1.TxnState.TRANSACTION_ABORTED) {
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throw new error_1.MongoTransactionError('Cannot call abortTransaction twice');
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}
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if (this.transaction.state === transactions_1.TxnState.TRANSACTION_COMMITTED ||
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this.transaction.state === transactions_1.TxnState.TRANSACTION_COMMITTED_EMPTY) {
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throw new error_1.MongoTransactionError('Cannot call abortTransaction after calling commitTransaction');
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}
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const command = { abortTransaction: 1 };
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const timeoutMS = typeof options?.timeoutMS === 'number'
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? options.timeoutMS
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: this.timeoutContext?.csotEnabled()
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? this.timeoutContext.timeoutMS // refresh timeoutMS for abort operation
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: typeof this.timeoutMS === 'number'
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? this.timeoutMS
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: null;
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const timeoutContext = timeoutMS != null
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? timeout_1.TimeoutContext.create({
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timeoutMS,
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serverSelectionTimeoutMS: this.clientOptions.serverSelectionTimeoutMS,
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socketTimeoutMS: this.clientOptions.socketTimeoutMS
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})
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: null;
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const wc = this.transaction.options.writeConcern ?? this.clientOptions?.writeConcern;
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if (wc != null && timeoutMS == null) {
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write_concern_1.WriteConcern.apply(command, { wtimeoutMS: 10000, w: 'majority', ...wc });
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}
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if (this.transaction.recoveryToken) {
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command.recoveryToken = this.transaction.recoveryToken;
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}
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const operation = new run_command_1.RunCommandOperation(new utils_1.MongoDBNamespace('admin'), command, {
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session: this,
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readPreference: read_preference_1.ReadPreference.primary,
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bypassPinningCheck: true
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});
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try {
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await (0, execute_operation_1.executeOperation)(this.client, operation, timeoutContext);
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this.unpin();
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return;
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}
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catch (firstAbortError) {
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this.unpin();
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if (firstAbortError.name === 'MongoRuntimeError')
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throw firstAbortError;
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if (options?.throwTimeout && firstAbortError.name === 'MongoOperationTimeoutError') {
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throw firstAbortError;
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}
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if (firstAbortError instanceof error_1.MongoError && (0, error_1.isRetryableWriteError)(firstAbortError)) {
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try {
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await (0, execute_operation_1.executeOperation)(this.client, operation, timeoutContext);
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return;
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}
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catch (secondAbortError) {
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if (secondAbortError.name === 'MongoRuntimeError')
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throw secondAbortError;
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if (options?.throwTimeout && secondAbortError.name === 'MongoOperationTimeoutError') {
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throw secondAbortError;
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}
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// we do not retry the retry
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}
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}
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// The spec indicates that if the operation times out or fails with a non-retryable error, we should ignore all errors on `abortTransaction`
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}
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finally {
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this.transaction.transition(transactions_1.TxnState.TRANSACTION_ABORTED);
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if (this.loadBalanced) {
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maybeClearPinnedConnection(this, { force: false });
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}
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}
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}
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/**
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* This is here to ensure that ClientSession is never serialized to BSON.
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*/
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toBSON() {
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throw new error_1.MongoRuntimeError('ClientSession cannot be serialized to BSON.');
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}
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/**
|
|
* Starts a transaction and runs a provided function, ensuring the commitTransaction is always attempted when all operations run in the function have completed.
|
|
*
|
|
* **IMPORTANT:** This method requires the function passed in to return a Promise. That promise must be made by `await`-ing all operations in such a way that rejections are propagated to the returned promise.
|
|
*
|
|
* **IMPORTANT:** Running operations in parallel is not supported during a transaction. The use of `Promise.all`,
|
|
* `Promise.allSettled`, `Promise.race`, etc to parallelize operations inside a transaction is
|
|
* undefined behaviour.
|
|
*
|
|
* **IMPORTANT:** When running an operation inside a `withTransaction` callback, if it is not
|
|
* provided the explicit session in its options, it will not be part of the transaction and it will not respect timeoutMS.
|
|
*
|
|
*
|
|
* @remarks
|
|
* - If all operations successfully complete and the `commitTransaction` operation is successful, then the provided function will return the result of the provided function.
|
|
* - If the transaction is unable to complete or an error is thrown from within the provided function, then the provided function will throw an error.
|
|
* - If the transaction is manually aborted within the provided function it will not throw.
|
|
* - If the driver needs to attempt to retry the operations, the provided function may be called multiple times.
|
|
*
|
|
* Checkout a descriptive example here:
|
|
* @see https://www.mongodb.com/blog/post/quick-start-nodejs--mongodb--how-to-implement-transactions
|
|
*
|
|
* If a command inside withTransaction fails:
|
|
* - It may cause the transaction on the server to be aborted.
|
|
* - This situation is normally handled transparently by the driver.
|
|
* - However, if the application catches such an error and does not rethrow it, the driver will not be able to determine whether the transaction was aborted or not.
|
|
* - The driver will then retry the transaction indefinitely.
|
|
*
|
|
* To avoid this situation, the application must not silently handle errors within the provided function.
|
|
* If the application needs to handle errors within, it must await all operations such that if an operation is rejected it becomes the rejection of the callback function passed into withTransaction.
|
|
*
|
|
* @param fn - callback to run within a transaction
|
|
* @param options - optional settings for the transaction
|
|
* @returns A raw command response or undefined
|
|
*/
|
|
async withTransaction(fn, options) {
|
|
const MAX_TIMEOUT = 120_000;
|
|
const timeoutMS = options?.timeoutMS ?? this.timeoutMS ?? null;
|
|
this.timeoutContext =
|
|
timeoutMS != null
|
|
? timeout_1.TimeoutContext.create({
|
|
timeoutMS,
|
|
serverSelectionTimeoutMS: this.clientOptions.serverSelectionTimeoutMS,
|
|
socketTimeoutMS: this.clientOptions.socketTimeoutMS
|
|
})
|
|
: null;
|
|
// 1. Define the following:
|
|
// 1.1 Record the current monotonic time, which will be used to enforce the 120-second / CSOT timeout before later retry attempts.
|
|
// 1.2 Set `transactionAttempt` to `0`.
|
|
// 1.3 Set `TIMEOUT_MS` to be `timeoutMS` if given, otherwise MAX_TIMEOUT (120-seconds).
|
|
// Timeout Error propagation
|
|
// When the previously encountered error needs to be propagated because there is no more time for another attempt,
|
|
// and it is not already a timeout error, then:
|
|
// - A timeout error MUST be propagated instead. It MUST expose the previously encountered error as specified in
|
|
// the "Errors" section of the CSOT specification.
|
|
// - If exposing the previously encountered error from a timeout error is impossible in a driver, then the driver
|
|
// is exempt from the requirement and MUST propagate the previously encountered error as is. The timeout error
|
|
// MUST copy all error labels from the previously encountered error.
|
|
// The spec describes timeout checks as "elapsed time < TIMEOUT_MS" (where elapsed = now - start).
|
|
// We precompute `deadline = now + remainingTimeMS` so each check becomes simply `now < deadline`.
|
|
const csotEnabled = !!this.timeoutContext?.csotEnabled();
|
|
const remainingTimeMS = this.timeoutContext?.csotEnabled()
|
|
? this.timeoutContext.remainingTimeMS
|
|
: MAX_TIMEOUT;
|
|
const deadline = (0, utils_1.processTimeMS)() + remainingTimeMS;
|
|
let committed = false;
|
|
let result;
|
|
let lastError = null;
|
|
try {
|
|
retryTransaction: for (let transactionAttempt = 0, isRetry = false; !committed; ++transactionAttempt, isRetry = transactionAttempt > 0) {
|
|
// 2. If `transactionAttempt` > 0:
|
|
if (isRetry) {
|
|
// 2.1 Calculate backoffMS to be jitter * min(BACKOFF_INITIAL * 1.5 ** (transactionAttempt - 1), BACKOFF_MAX).
|
|
// If elapsed time + backoffMS > TIMEOUT_MS, then propagate the previously encountered error to the caller of
|
|
// withTransaction as per timeout error propagation and return immediately. Otherwise, sleep for backoffMS.
|
|
// 2.1.1 jitter is a random float between [0, 1), optionally including 1, depending on what is most natural
|
|
// for the given driver language.
|
|
// 2.1.2 transactionAttempt is the variable defined in step 1.
|
|
// 2.1.3 BACKOFF_INITIAL is 5ms
|
|
// 2.1.4 BACKOFF_MAX is 500ms
|
|
const BACKOFF_INITIAL_MS = 5;
|
|
const BACKOFF_MAX_MS = 500;
|
|
const BACKOFF_GROWTH = 1.5;
|
|
const jitter = Math.random();
|
|
const backoffMS = jitter *
|
|
Math.min(BACKOFF_INITIAL_MS * BACKOFF_GROWTH ** (transactionAttempt - 1), BACKOFF_MAX_MS);
|
|
if ((0, utils_1.processTimeMS)() + backoffMS >= deadline) {
|
|
throw makeTimeoutError(lastError ??
|
|
new error_1.MongoRuntimeError(`Transaction retry did not record an error: should never occur. Please file a bug.`), csotEnabled);
|
|
}
|
|
await (0, promises_1.setTimeout)(backoffMS);
|
|
}
|
|
// 3. Invoke startTransaction on the session and increment transactionAttempt. If TransactionOptions were
|
|
// specified in the call to withTransaction, those MUST be used for startTransaction. Note that
|
|
// ClientSession.defaultTransactionOptions will be used in the absence of any explicit TransactionOptions.
|
|
// 4. If startTransaction reported an error, propagate that error to the caller of withTransaction as is and
|
|
// return immediately.
|
|
this.startTransaction(options);
|
|
try {
|
|
// 5. Invoke the callback. Drivers MUST ensure that the ClientSession can be accessed within the callback
|
|
// (e.g. pass ClientSession as the first parameter, rely on lexical scoping). Drivers MAY pass additional
|
|
// parameters as needed (e.g. user data solicited by withTransaction).
|
|
const promise = fn(this);
|
|
if (!(0, utils_1.isPromiseLike)(promise)) {
|
|
throw new error_1.MongoInvalidArgumentError('Function provided to `withTransaction` must return a Promise');
|
|
}
|
|
// 6. Control returns to withTransaction. Determine the current state of the ClientSession and whether the
|
|
// callback reported an error (e.g. thrown exception, error output parameter).
|
|
result = await promise;
|
|
// 8. If the ClientSession is in the "no transaction", "transaction aborted", or "transaction committed"
|
|
// state, assume the callback intentionally aborted or committed the transaction and return immediately.
|
|
if (this.transaction.state === transactions_1.TxnState.NO_TRANSACTION ||
|
|
this.transaction.state === transactions_1.TxnState.TRANSACTION_COMMITTED ||
|
|
this.transaction.state === transactions_1.TxnState.TRANSACTION_ABORTED) {
|
|
return result;
|
|
}
|
|
}
|
|
catch (fnError) {
|
|
// 7. If the callback reported an error
|
|
if (!(fnError instanceof error_1.MongoError) || fnError instanceof error_1.MongoInvalidArgumentError) {
|
|
// This first preemptive abort regardless of TxnState isn't spec,
|
|
// and it's unclear whether it's serving a practical purpose, but this logic is OLD
|
|
await this.abortTransaction();
|
|
throw fnError;
|
|
}
|
|
lastError = fnError;
|
|
// 7.1 If the ClientSession is in the "starting transaction" or "transaction in progress"
|
|
// state, invoke abortTransaction on the session.
|
|
if (this.transaction.state === transactions_1.TxnState.STARTING_TRANSACTION ||
|
|
this.transaction.state === transactions_1.TxnState.TRANSACTION_IN_PROGRESS) {
|
|
await this.abortTransaction();
|
|
}
|
|
// 7.2 If the callback's error includes a "TransientTransactionError" label, jump back to step two.
|
|
if (fnError.hasErrorLabel(error_1.MongoErrorLabel.TransientTransactionError)) {
|
|
if ((0, utils_1.processTimeMS)() >= deadline) {
|
|
throw makeTimeoutError(lastError, csotEnabled);
|
|
}
|
|
continue retryTransaction;
|
|
}
|
|
// 7.3 If the callback's error includes a "UnknownTransactionCommitResult" label, the callback must
|
|
// have manually committed a transaction, propagate the callback's error to the caller of withTransaction
|
|
// as is and return immediately.
|
|
// 7.4 Otherwise, propagate the callback's error to the caller of withTransaction as is and return immediately.
|
|
throw fnError;
|
|
}
|
|
retryCommit: while (!committed) {
|
|
try {
|
|
// 9. Invoke commitTransaction on the session.
|
|
await this.commitTransaction();
|
|
committed = true;
|
|
}
|
|
catch (commitError) {
|
|
// 10. If commitTransaction reported an error:
|
|
lastError = commitError;
|
|
// 10.1 If the commitTransaction error includes a UnknownTransactionCommitResult label and the error is
|
|
// not MaxTimeMSExpired
|
|
if (commitError.hasErrorLabel(error_1.MongoErrorLabel.UnknownTransactionCommitResult) &&
|
|
!isMaxTimeMSExpiredError(commitError)) {
|
|
// 10.1.1 If the elapsed time of withTransaction exceeded TIMEOUT_MS, propagate the commitTransaction
|
|
// error to the caller of withTransaction as per timeout error propagation and return immediately.
|
|
if ((0, utils_1.processTimeMS)() >= deadline) {
|
|
throw makeTimeoutError(commitError, csotEnabled);
|
|
}
|
|
// 10.1.2 Otherwise, jump back to step nine. We will trust commitTransaction to apply a majority write
|
|
// concern on retry attempts (see: Majority write concern is used when retrying commitTransaction).
|
|
continue retryCommit;
|
|
}
|
|
// 10.2 If the commitTransaction error includes a TransientTransactionError label, jump back to step two.
|
|
if (commitError.hasErrorLabel(error_1.MongoErrorLabel.TransientTransactionError)) {
|
|
continue retryTransaction;
|
|
}
|
|
// 10.3 Otherwise, propagate the commitTransaction error to the caller of withTransaction as is and return
|
|
// immediately.
|
|
throw commitError;
|
|
}
|
|
}
|
|
}
|
|
// 11. The transaction was committed successfully. Return immediately.
|
|
// @ts-expect-error Result is always defined if we reach here, the for-loop above convinces TS it is not.
|
|
return result;
|
|
}
|
|
finally {
|
|
this.timeoutContext = null;
|
|
}
|
|
}
|
|
}
|
|
exports.ClientSession = ClientSession;
|
|
function makeTimeoutError(cause, csotEnabled) {
|
|
// Async APIs know how to cancel themselves and might return CSOT error
|
|
if (cause instanceof error_1.MongoOperationTimeoutError) {
|
|
return cause;
|
|
}
|
|
if (csotEnabled) {
|
|
const timeoutError = new error_1.MongoOperationTimeoutError('Timed out during withTransaction', {
|
|
cause
|
|
});
|
|
if (cause instanceof error_1.MongoError) {
|
|
for (const label of cause.errorLabels) {
|
|
timeoutError.addErrorLabel(label);
|
|
}
|
|
}
|
|
return timeoutError;
|
|
}
|
|
return cause;
|
|
}
|
|
const NON_DETERMINISTIC_WRITE_CONCERN_ERRORS = new Set([
|
|
'CannotSatisfyWriteConcern',
|
|
'UnknownReplWriteConcern',
|
|
'UnsatisfiableWriteConcern'
|
|
]);
|
|
function shouldUnpinAfterCommitError(commitError) {
|
|
if (commitError instanceof error_1.MongoError) {
|
|
if ((0, error_1.isRetryableWriteError)(commitError) ||
|
|
commitError instanceof error_1.MongoWriteConcernError ||
|
|
isMaxTimeMSExpiredError(commitError)) {
|
|
if (isUnknownTransactionCommitResult(commitError)) {
|
|
// per txns spec, must unpin session in this case
|
|
return true;
|
|
}
|
|
}
|
|
else if (commitError.hasErrorLabel(error_1.MongoErrorLabel.TransientTransactionError)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
function shouldAddUnknownTransactionCommitResultLabel(commitError) {
|
|
let ok = (0, error_1.isRetryableWriteError)(commitError);
|
|
ok ||= commitError instanceof error_1.MongoWriteConcernError;
|
|
ok ||= isMaxTimeMSExpiredError(commitError);
|
|
ok &&= isUnknownTransactionCommitResult(commitError);
|
|
return ok;
|
|
}
|
|
function isUnknownTransactionCommitResult(err) {
|
|
const isNonDeterministicWriteConcernError = err instanceof error_1.MongoServerError &&
|
|
err.codeName &&
|
|
NON_DETERMINISTIC_WRITE_CONCERN_ERRORS.has(err.codeName);
|
|
return (isMaxTimeMSExpiredError(err) ||
|
|
(!isNonDeterministicWriteConcernError &&
|
|
err.code !== error_1.MONGODB_ERROR_CODES.UnsatisfiableWriteConcern &&
|
|
err.code !== error_1.MONGODB_ERROR_CODES.UnknownReplWriteConcern));
|
|
}
|
|
function maybeClearPinnedConnection(session, options) {
|
|
// unpin a connection if it has been pinned
|
|
const conn = session.pinnedConnection;
|
|
const error = options?.error;
|
|
if (session.inTransaction() &&
|
|
error &&
|
|
error instanceof error_1.MongoError &&
|
|
error.hasErrorLabel(error_1.MongoErrorLabel.TransientTransactionError)) {
|
|
return;
|
|
}
|
|
const topology = session.client.topology;
|
|
// NOTE: the spec talks about what to do on a network error only, but the tests seem to
|
|
// to validate that we don't unpin on _all_ errors?
|
|
if (conn && topology != null) {
|
|
const servers = Array.from(topology.s.servers.values());
|
|
const loadBalancer = servers[0];
|
|
if (options?.error == null || options?.force) {
|
|
loadBalancer.pool.checkIn(conn);
|
|
session.pinnedConnection = undefined;
|
|
conn.emit(constants_1.UNPINNED, session.transaction.state !== transactions_1.TxnState.NO_TRANSACTION
|
|
? metrics_1.ConnectionPoolMetrics.TXN
|
|
: metrics_1.ConnectionPoolMetrics.CURSOR);
|
|
if (options?.forceClear) {
|
|
loadBalancer.pool.clear({ serviceId: conn.serviceId });
|
|
}
|
|
}
|
|
}
|
|
}
|
|
function isMaxTimeMSExpiredError(err) {
|
|
if (err == null || !(err instanceof error_1.MongoServerError)) {
|
|
return false;
|
|
}
|
|
return (err.code === error_1.MONGODB_ERROR_CODES.MaxTimeMSExpired ||
|
|
err.writeConcernError?.code === error_1.MONGODB_ERROR_CODES.MaxTimeMSExpired);
|
|
}
|
|
/**
|
|
* Reflects the existence of a session on the server. Can be reused by the session pool.
|
|
* WARNING: not meant to be instantiated directly. For internal use only.
|
|
* @public
|
|
*/
|
|
class ServerSession {
|
|
/** @internal */
|
|
constructor(cloned) {
|
|
if (cloned != null) {
|
|
const idBytes = bson_1.ByteUtils.allocateUnsafe(16);
|
|
idBytes.set(cloned.id.id.buffer);
|
|
this.id = { id: new bson_1.Binary(idBytes, cloned.id.id.sub_type) };
|
|
this.lastUse = cloned.lastUse;
|
|
this.txnNumber = cloned.txnNumber;
|
|
this.isDirty = cloned.isDirty;
|
|
return;
|
|
}
|
|
this.id = { id: new bson_1.Binary((0, utils_1.uuidV4)(), bson_1.Binary.SUBTYPE_UUID) };
|
|
this.lastUse = (0, utils_1.processTimeMS)();
|
|
this.txnNumber = 0;
|
|
this.isDirty = false;
|
|
}
|
|
/**
|
|
* Determines if the server session has timed out.
|
|
*
|
|
* @param sessionTimeoutMinutes - The server's "logicalSessionTimeoutMinutes"
|
|
*/
|
|
hasTimedOut(sessionTimeoutMinutes) {
|
|
// Take the difference of the lastUse timestamp and now, which will result in a value in
|
|
// milliseconds, and then convert milliseconds to minutes to compare to `sessionTimeoutMinutes`
|
|
const idleTimeMinutes = Math.round((((0, utils_1.calculateDurationInMs)(this.lastUse) % 86400000) % 3600000) / 60000);
|
|
return idleTimeMinutes > sessionTimeoutMinutes - 1;
|
|
}
|
|
}
|
|
exports.ServerSession = ServerSession;
|
|
/**
|
|
* Maintains a pool of Server Sessions.
|
|
* For internal use only
|
|
* @internal
|
|
*/
|
|
class ServerSessionPool {
|
|
constructor(client) {
|
|
if (client == null) {
|
|
throw new error_1.MongoRuntimeError('ServerSessionPool requires a MongoClient');
|
|
}
|
|
this.client = client;
|
|
this.sessions = new utils_1.List();
|
|
}
|
|
/**
|
|
* Acquire a Server Session from the pool.
|
|
* Iterates through each session in the pool, removing any stale sessions
|
|
* along the way. The first non-stale session found is removed from the
|
|
* pool and returned. If no non-stale session is found, a new ServerSession is created.
|
|
*/
|
|
acquire() {
|
|
const sessionTimeoutMinutes = this.client.topology?.logicalSessionTimeoutMinutes ?? 10;
|
|
let session = null;
|
|
// Try to obtain from session pool
|
|
while (this.sessions.length > 0) {
|
|
const potentialSession = this.sessions.shift();
|
|
if (potentialSession != null &&
|
|
(!!this.client.topology?.loadBalanced ||
|
|
!potentialSession.hasTimedOut(sessionTimeoutMinutes))) {
|
|
session = potentialSession;
|
|
break;
|
|
}
|
|
}
|
|
// If nothing valid came from the pool make a new one
|
|
if (session == null) {
|
|
session = new ServerSession();
|
|
}
|
|
return session;
|
|
}
|
|
/**
|
|
* Release a session to the session pool
|
|
* Adds the session back to the session pool if the session has not timed out yet.
|
|
* This method also removes any stale sessions from the pool.
|
|
*
|
|
* @param session - The session to release to the pool
|
|
*/
|
|
release(session) {
|
|
const sessionTimeoutMinutes = this.client.topology?.logicalSessionTimeoutMinutes ?? 10;
|
|
if (this.client.topology?.loadBalanced && !sessionTimeoutMinutes) {
|
|
this.sessions.unshift(session);
|
|
}
|
|
if (!sessionTimeoutMinutes) {
|
|
return;
|
|
}
|
|
this.sessions.prune(session => session.hasTimedOut(sessionTimeoutMinutes));
|
|
if (!session.hasTimedOut(sessionTimeoutMinutes)) {
|
|
if (session.isDirty) {
|
|
return;
|
|
}
|
|
// otherwise, readd this session to the session pool
|
|
this.sessions.unshift(session);
|
|
}
|
|
}
|
|
}
|
|
exports.ServerSessionPool = ServerSessionPool;
|
|
/**
|
|
* Optionally decorate a command with sessions specific keys
|
|
*
|
|
* @param session - the session tracking transaction state
|
|
* @param command - the command to decorate
|
|
* @param options - Optional settings passed to calling operation
|
|
*
|
|
* @internal
|
|
*/
|
|
function applySession(session, command, options) {
|
|
if (session.hasEnded) {
|
|
return new error_1.MongoExpiredSessionError();
|
|
}
|
|
// May acquire serverSession here
|
|
const serverSession = session.serverSession;
|
|
if (serverSession == null) {
|
|
return new error_1.MongoRuntimeError('Unable to acquire server session');
|
|
}
|
|
if (options.writeConcern?.w === 0) {
|
|
if (session && session.explicit) {
|
|
// Error if user provided an explicit session to an unacknowledged write (SPEC-1019)
|
|
return new error_1.MongoAPIError('Cannot have explicit session with unacknowledged writes');
|
|
}
|
|
return;
|
|
}
|
|
// mark the last use of this session, and apply the `lsid`
|
|
serverSession.lastUse = (0, utils_1.processTimeMS)();
|
|
command.lsid = serverSession.id;
|
|
const inTxnOrTxnCommand = session.inTransaction() || (0, transactions_1.isTransactionCommand)(command);
|
|
const isRetryableWrite = !!options.willRetryWrite;
|
|
if (isRetryableWrite || inTxnOrTxnCommand) {
|
|
serverSession.txnNumber += session.txnNumberIncrement;
|
|
session.txnNumberIncrement = 0;
|
|
// TODO(NODE-2674): Preserve int64 sent from MongoDB
|
|
command.txnNumber = bson_1.Long.fromNumber(serverSession.txnNumber);
|
|
}
|
|
if (!inTxnOrTxnCommand) {
|
|
if (session.transaction.state !== transactions_1.TxnState.NO_TRANSACTION) {
|
|
session.transaction.transition(transactions_1.TxnState.NO_TRANSACTION);
|
|
}
|
|
if (session.supports.causalConsistency &&
|
|
session.operationTime &&
|
|
(0, utils_1.commandSupportsReadConcern)(command)) {
|
|
command.readConcern = command.readConcern || {};
|
|
Object.assign(command.readConcern, { afterClusterTime: session.operationTime });
|
|
}
|
|
else if (session.snapshotEnabled) {
|
|
command.readConcern = command.readConcern || { level: read_concern_1.ReadConcernLevel.snapshot };
|
|
if (session.snapshotTime != null) {
|
|
Object.assign(command.readConcern, { atClusterTime: session.snapshotTime });
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
// now attempt to apply transaction-specific sessions data
|
|
// `autocommit` must always be false to differentiate from retryable writes
|
|
command.autocommit = false;
|
|
if (session.transaction.state === transactions_1.TxnState.STARTING_TRANSACTION) {
|
|
command.startTransaction = true;
|
|
const readConcern = session.transaction.options.readConcern || session?.clientOptions?.readConcern;
|
|
if (readConcern) {
|
|
command.readConcern = readConcern;
|
|
}
|
|
if (session.supports.causalConsistency && session.operationTime) {
|
|
command.readConcern = command.readConcern || {};
|
|
Object.assign(command.readConcern, { afterClusterTime: session.operationTime });
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
function updateSessionFromResponse(session, document) {
|
|
if (document.$clusterTime) {
|
|
(0, common_1._advanceClusterTime)(session, document.$clusterTime);
|
|
}
|
|
if (document.operationTime && session && session.supports.causalConsistency) {
|
|
session.advanceOperationTime(document.operationTime);
|
|
}
|
|
if (document.recoveryToken && session && session.inTransaction()) {
|
|
session.transaction._recoveryToken = document.recoveryToken;
|
|
}
|
|
if (session?.snapshotEnabled && session.snapshotTime == null) {
|
|
// find and aggregate commands return atClusterTime on the cursor
|
|
// distinct includes it in the response body
|
|
const atClusterTime = document.atClusterTime;
|
|
if (atClusterTime) {
|
|
session.snapshotTime = atClusterTime;
|
|
}
|
|
}
|
|
if (session.transaction.state === transactions_1.TxnState.STARTING_TRANSACTION) {
|
|
if (document.ok === 1) {
|
|
session.transaction.transition(transactions_1.TxnState.TRANSACTION_IN_PROGRESS);
|
|
}
|
|
else {
|
|
const error = new error_1.MongoServerError(document.toObject());
|
|
const isRetryableError = error.hasErrorLabel(error_1.MongoErrorLabel.RetryableError);
|
|
if (!isRetryableError) {
|
|
session.transaction.transition(transactions_1.TxnState.TRANSACTION_IN_PROGRESS);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
//# sourceMappingURL=sessions.js.map
|