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737 lines
31 KiB
737 lines
31 KiB
3 years ago
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"use strict";
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var _a;
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.updateSessionFromResponse = exports.applySession = exports.ServerSessionPool = exports.ServerSession = exports.maybeClearPinnedConnection = exports.ClientSession = void 0;
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const util_1 = require("util");
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const bson_1 = require("./bson");
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const metrics_1 = require("./cmap/metrics");
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const shared_1 = require("./cmap/wire_protocol/shared");
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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 transactions_1 = require("./transactions");
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const utils_1 = require("./utils");
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const minWireVersionForShardedTransactions = 8;
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/** @internal */
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const kServerSession = Symbol('serverSession');
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/** @internal */
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const kSnapshotTime = Symbol('snapshotTime');
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/** @internal */
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const kSnapshotEnabled = Symbol('snapshotEnabled');
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/** @internal */
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const kPinnedConnection = Symbol('pinnedConnection');
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/** @internal Accumulates total number of increments to add to txnNumber when applying session to command */
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const kTxnNumberIncrement = Symbol('txnNumberIncrement');
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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[_a] = false;
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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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if (options.snapshot === true) {
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this[kSnapshotEnabled] = true;
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if (options.causalConsistency === true) {
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throw new error_1.MongoInvalidArgumentError('Properties "causalConsistency" and "snapshot" are mutually exclusive');
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}
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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.explicit = !!options.explicit;
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this[kServerSession] = this.explicit ? this.sessionPool.acquire() : null;
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this[kTxnNumberIncrement] = 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 = Object.assign({}, 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[kServerSession]?.id;
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}
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get serverSession() {
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let serverSession = this[kServerSession];
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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[kServerSession] = serverSession;
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}
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return serverSession;
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}
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/** Whether or not this session is configured for snapshot reads */
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get snapshotEnabled() {
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return this[kSnapshotEnabled];
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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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get pinnedConnection() {
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return this[kPinnedConnection];
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}
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/** @internal */
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pin(conn) {
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if (this[kPinnedConnection]) {
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throw TypeError('Cannot pin multiple connections to the same session');
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}
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this[kPinnedConnection] = 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[kPinnedConnection] : this.transaction.isPinned;
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}
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/**
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* Ends this 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();
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}
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if (!this.hasEnded) {
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const serverSession = this[kServerSession];
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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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// Make sure a new serverSession never makes it onto this ClientSession
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Object.defineProperty(this, kServerSession, {
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value: ServerSession.clone(serverSession),
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writable: false
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});
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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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}
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catch {
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// spec indicates that we should ignore all errors for `endSessions`
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}
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finally {
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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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* 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 !== '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 utils_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[kTxnNumberIncrement] += 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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* @param options - Options for the transaction
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*/
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startTransaction(options) {
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if (this[kSnapshotEnabled]) {
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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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const topologyMaxWireVersion = (0, utils_1.maxWireVersion)(this.client.topology);
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if ((0, shared_1.isSharded)(this.client.topology) &&
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topologyMaxWireVersion != null &&
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topologyMaxWireVersion < minWireVersionForShardedTransactions) {
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throw new error_1.MongoCompatibilityError('Transactions are not supported on sharded clusters in MongoDB < 4.2.');
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}
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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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async commitTransaction() {
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return endTransactionAsync(this, 'commitTransaction');
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}
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/**
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* Aborts the currently active transaction in this session.
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*/
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async abortTransaction() {
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return endTransactionAsync(this, 'abortTransaction');
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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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/**
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* Runs a provided callback within a transaction, retrying either the commitTransaction operation
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* or entire transaction as needed (and when the error permits) to better ensure that
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* the transaction can complete successfully.
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*
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* **IMPORTANT:** This method requires the user to return a Promise, and `await` all operations.
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* Any callbacks that do not return a Promise will result in undefined behavior.
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*
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* @remarks
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* This function:
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* - Will return the command response from the final commitTransaction if every operation is successful (can be used as a truthy object)
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* - Will return `undefined` if the transaction is explicitly aborted with `await session.abortTransaction()`
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* - Will throw if one of the operations throws or `throw` statement is used inside the `withTransaction` callback
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*
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* Checkout a descriptive example here:
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* @see https://www.mongodb.com/developer/quickstart/node-transactions/
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*
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* @param fn - callback to run within a transaction
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* @param options - optional settings for the transaction
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* @returns A raw command response or undefined
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*/
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async withTransaction(fn, options) {
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const startTime = (0, utils_1.now)();
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return attemptTransaction(this, startTime, fn, options);
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}
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}
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exports.ClientSession = ClientSession;
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_a = kSnapshotEnabled;
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const MAX_WITH_TRANSACTION_TIMEOUT = 120000;
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const NON_DETERMINISTIC_WRITE_CONCERN_ERRORS = new Set([
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'CannotSatisfyWriteConcern',
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'UnknownReplWriteConcern',
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'UnsatisfiableWriteConcern'
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]);
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function hasNotTimedOut(startTime, max) {
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return (0, utils_1.calculateDurationInMs)(startTime) < max;
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}
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function isUnknownTransactionCommitResult(err) {
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const isNonDeterministicWriteConcernError = err instanceof error_1.MongoServerError &&
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err.codeName &&
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NON_DETERMINISTIC_WRITE_CONCERN_ERRORS.has(err.codeName);
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return (isMaxTimeMSExpiredError(err) ||
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(!isNonDeterministicWriteConcernError &&
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err.code !== error_1.MONGODB_ERROR_CODES.UnsatisfiableWriteConcern &&
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err.code !== error_1.MONGODB_ERROR_CODES.UnknownReplWriteConcern));
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}
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function maybeClearPinnedConnection(session, options) {
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// unpin a connection if it has been pinned
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const conn = session[kPinnedConnection];
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const error = options?.error;
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if (session.inTransaction() &&
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error &&
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error instanceof error_1.MongoError &&
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error.hasErrorLabel(error_1.MongoErrorLabel.TransientTransactionError)) {
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return;
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}
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const topology = session.client.topology;
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// NOTE: the spec talks about what to do on a network error only, but the tests seem to
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// to validate that we don't unpin on _all_ errors?
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if (conn && topology != null) {
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const servers = Array.from(topology.s.servers.values());
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const loadBalancer = servers[0];
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if (options?.error == null || options?.force) {
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loadBalancer.s.pool.checkIn(conn);
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conn.emit(constants_1.UNPINNED, session.transaction.state !== transactions_1.TxnState.NO_TRANSACTION
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? metrics_1.ConnectionPoolMetrics.TXN
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: metrics_1.ConnectionPoolMetrics.CURSOR);
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if (options?.forceClear) {
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loadBalancer.s.pool.clear({ serviceId: conn.serviceId });
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|
|
}
|
||
|
|
}
|
||
|
|
session[kPinnedConnection] = undefined;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
exports.maybeClearPinnedConnection = maybeClearPinnedConnection;
|
||
|
|
function isMaxTimeMSExpiredError(err) {
|
||
|
|
if (err == null || !(err instanceof error_1.MongoServerError)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
return (err.code === error_1.MONGODB_ERROR_CODES.MaxTimeMSExpired ||
|
||
|
|
(err.writeConcernError && err.writeConcernError.code === error_1.MONGODB_ERROR_CODES.MaxTimeMSExpired));
|
||
|
|
}
|
||
|
|
function attemptTransactionCommit(session, startTime, fn, options) {
|
||
|
|
return session.commitTransaction().catch((err) => {
|
||
|
|
if (err instanceof error_1.MongoError &&
|
||
|
|
hasNotTimedOut(startTime, MAX_WITH_TRANSACTION_TIMEOUT) &&
|
||
|
|
!isMaxTimeMSExpiredError(err)) {
|
||
|
|
if (err.hasErrorLabel(error_1.MongoErrorLabel.UnknownTransactionCommitResult)) {
|
||
|
|
return attemptTransactionCommit(session, startTime, fn, options);
|
||
|
|
}
|
||
|
|
if (err.hasErrorLabel(error_1.MongoErrorLabel.TransientTransactionError)) {
|
||
|
|
return attemptTransaction(session, startTime, fn, options);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
throw err;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
const USER_EXPLICIT_TXN_END_STATES = new Set([
|
||
|
|
transactions_1.TxnState.NO_TRANSACTION,
|
||
|
|
transactions_1.TxnState.TRANSACTION_COMMITTED,
|
||
|
|
transactions_1.TxnState.TRANSACTION_ABORTED
|
||
|
|
]);
|
||
|
|
function userExplicitlyEndedTransaction(session) {
|
||
|
|
return USER_EXPLICIT_TXN_END_STATES.has(session.transaction.state);
|
||
|
|
}
|
||
|
|
function attemptTransaction(session, startTime, fn, options) {
|
||
|
|
session.startTransaction(options);
|
||
|
|
let promise;
|
||
|
|
try {
|
||
|
|
promise = fn(session);
|
||
|
|
}
|
||
|
|
catch (err) {
|
||
|
|
promise = Promise.reject(err);
|
||
|
|
}
|
||
|
|
if (!(0, utils_1.isPromiseLike)(promise)) {
|
||
|
|
session.abortTransaction().catch(() => null);
|
||
|
|
throw new error_1.MongoInvalidArgumentError('Function provided to `withTransaction` must return a Promise');
|
||
|
|
}
|
||
|
|
return promise.then(() => {
|
||
|
|
if (userExplicitlyEndedTransaction(session)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
return attemptTransactionCommit(session, startTime, fn, options);
|
||
|
|
}, err => {
|
||
|
|
function maybeRetryOrThrow(err) {
|
||
|
|
if (err instanceof error_1.MongoError &&
|
||
|
|
err.hasErrorLabel(error_1.MongoErrorLabel.TransientTransactionError) &&
|
||
|
|
hasNotTimedOut(startTime, MAX_WITH_TRANSACTION_TIMEOUT)) {
|
||
|
|
return attemptTransaction(session, startTime, fn, options);
|
||
|
|
}
|
||
|
|
if (isMaxTimeMSExpiredError(err)) {
|
||
|
|
err.addErrorLabel(error_1.MongoErrorLabel.UnknownTransactionCommitResult);
|
||
|
|
}
|
||
|
|
throw err;
|
||
|
|
}
|
||
|
|
if (session.inTransaction()) {
|
||
|
|
return session.abortTransaction().then(() => maybeRetryOrThrow(err));
|
||
|
|
}
|
||
|
|
return maybeRetryOrThrow(err);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
const endTransactionAsync = (0, util_1.promisify)(endTransaction);
|
||
|
|
function endTransaction(session, commandName, callback) {
|
||
|
|
// handle any initial problematic cases
|
||
|
|
const txnState = session.transaction.state;
|
||
|
|
if (txnState === transactions_1.TxnState.NO_TRANSACTION) {
|
||
|
|
callback(new error_1.MongoTransactionError('No transaction started'));
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (commandName === 'commitTransaction') {
|
||
|
|
if (txnState === transactions_1.TxnState.STARTING_TRANSACTION ||
|
||
|
|
txnState === transactions_1.TxnState.TRANSACTION_COMMITTED_EMPTY) {
|
||
|
|
// the transaction was never started, we can safely exit here
|
||
|
|
session.transaction.transition(transactions_1.TxnState.TRANSACTION_COMMITTED_EMPTY);
|
||
|
|
callback();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (txnState === transactions_1.TxnState.TRANSACTION_ABORTED) {
|
||
|
|
callback(new error_1.MongoTransactionError('Cannot call commitTransaction after calling abortTransaction'));
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (txnState === transactions_1.TxnState.STARTING_TRANSACTION) {
|
||
|
|
// the transaction was never started, we can safely exit here
|
||
|
|
session.transaction.transition(transactions_1.TxnState.TRANSACTION_ABORTED);
|
||
|
|
callback();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (txnState === transactions_1.TxnState.TRANSACTION_ABORTED) {
|
||
|
|
callback(new error_1.MongoTransactionError('Cannot call abortTransaction twice'));
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (txnState === transactions_1.TxnState.TRANSACTION_COMMITTED ||
|
||
|
|
txnState === transactions_1.TxnState.TRANSACTION_COMMITTED_EMPTY) {
|
||
|
|
callback(new error_1.MongoTransactionError('Cannot call abortTransaction after calling commitTransaction'));
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// construct and send the command
|
||
|
|
const command = { [commandName]: 1 };
|
||
|
|
// apply a writeConcern if specified
|
||
|
|
let writeConcern;
|
||
|
|
if (session.transaction.options.writeConcern) {
|
||
|
|
writeConcern = Object.assign({}, session.transaction.options.writeConcern);
|
||
|
|
}
|
||
|
|
else if (session.clientOptions && session.clientOptions.writeConcern) {
|
||
|
|
writeConcern = { w: session.clientOptions.writeConcern.w };
|
||
|
|
}
|
||
|
|
if (txnState === transactions_1.TxnState.TRANSACTION_COMMITTED) {
|
||
|
|
writeConcern = Object.assign({ wtimeout: 10000 }, writeConcern, { w: 'majority' });
|
||
|
|
}
|
||
|
|
if (writeConcern) {
|
||
|
|
Object.assign(command, { writeConcern });
|
||
|
|
}
|
||
|
|
if (commandName === 'commitTransaction' && session.transaction.options.maxTimeMS) {
|
||
|
|
Object.assign(command, { maxTimeMS: session.transaction.options.maxTimeMS });
|
||
|
|
}
|
||
|
|
function commandHandler(error, result) {
|
||
|
|
if (commandName !== 'commitTransaction') {
|
||
|
|
session.transaction.transition(transactions_1.TxnState.TRANSACTION_ABORTED);
|
||
|
|
if (session.loadBalanced) {
|
||
|
|
maybeClearPinnedConnection(session, { force: false });
|
||
|
|
}
|
||
|
|
// The spec indicates that we should ignore all errors on `abortTransaction`
|
||
|
|
return callback();
|
||
|
|
}
|
||
|
|
session.transaction.transition(transactions_1.TxnState.TRANSACTION_COMMITTED);
|
||
|
|
if (error instanceof error_1.MongoError) {
|
||
|
|
if (error.hasErrorLabel(error_1.MongoErrorLabel.RetryableWriteError) ||
|
||
|
|
error instanceof error_1.MongoWriteConcernError ||
|
||
|
|
isMaxTimeMSExpiredError(error)) {
|
||
|
|
if (isUnknownTransactionCommitResult(error)) {
|
||
|
|
error.addErrorLabel(error_1.MongoErrorLabel.UnknownTransactionCommitResult);
|
||
|
|
// per txns spec, must unpin session in this case
|
||
|
|
session.unpin({ error });
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (error.hasErrorLabel(error_1.MongoErrorLabel.TransientTransactionError)) {
|
||
|
|
session.unpin({ error });
|
||
|
|
}
|
||
|
|
}
|
||
|
|
callback(error, result);
|
||
|
|
}
|
||
|
|
if (session.transaction.recoveryToken) {
|
||
|
|
command.recoveryToken = session.transaction.recoveryToken;
|
||
|
|
}
|
||
|
|
// send the command
|
||
|
|
(0, execute_operation_1.executeOperation)(session.client, new run_command_1.RunAdminCommandOperation(undefined, command, {
|
||
|
|
session,
|
||
|
|
readPreference: read_preference_1.ReadPreference.primary,
|
||
|
|
bypassPinningCheck: true
|
||
|
|
}), (error, result) => {
|
||
|
|
if (command.abortTransaction) {
|
||
|
|
// always unpin on abort regardless of command outcome
|
||
|
|
session.unpin();
|
||
|
|
}
|
||
|
|
if (error instanceof error_1.MongoError && error.hasErrorLabel(error_1.MongoErrorLabel.RetryableWriteError)) {
|
||
|
|
// SPEC-1185: apply majority write concern when retrying commitTransaction
|
||
|
|
if (command.commitTransaction) {
|
||
|
|
// per txns spec, must unpin session in this case
|
||
|
|
session.unpin({ force: true });
|
||
|
|
command.writeConcern = Object.assign({ wtimeout: 10000 }, command.writeConcern, {
|
||
|
|
w: 'majority'
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return (0, execute_operation_1.executeOperation)(session.client, new run_command_1.RunAdminCommandOperation(undefined, command, {
|
||
|
|
session,
|
||
|
|
readPreference: read_preference_1.ReadPreference.primary,
|
||
|
|
bypassPinningCheck: true
|
||
|
|
}), commandHandler);
|
||
|
|
}
|
||
|
|
commandHandler(error, result);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* 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() {
|
||
|
|
this.id = { id: new bson_1.Binary((0, utils_1.uuidV4)(), bson_1.Binary.SUBTYPE_UUID) };
|
||
|
|
this.lastUse = (0, utils_1.now)();
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* @internal
|
||
|
|
* Cloning meant to keep a readable reference to the server session data
|
||
|
|
* after ClientSession has ended
|
||
|
|
*/
|
||
|
|
static clone(serverSession) {
|
||
|
|
const arrayBuffer = new ArrayBuffer(16);
|
||
|
|
const idBytes = Buffer.from(arrayBuffer);
|
||
|
|
idBytes.set(serverSession.id.id.buffer);
|
||
|
|
const id = new bson_1.Binary(idBytes, serverSession.id.id.sub_type);
|
||
|
|
// Manual prototype construction to avoid modifying the constructor of this class
|
||
|
|
return Object.setPrototypeOf({
|
||
|
|
id: { id },
|
||
|
|
lastUse: serverSession.lastUse,
|
||
|
|
txnNumber: serverSession.txnNumber,
|
||
|
|
isDirty: serverSession.isDirty
|
||
|
|
}, ServerSession.prototype);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
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.now)();
|
||
|
|
command.lsid = serverSession.id;
|
||
|
|
const inTxnOrTxnCommand = session.inTransaction() || (0, transactions_1.isTransactionCommand)(command);
|
||
|
|
const isRetryableWrite = !!options.willRetryWrite;
|
||
|
|
if (isRetryableWrite || inTxnOrTxnCommand) {
|
||
|
|
serverSession.txnNumber += session[kTxnNumberIncrement];
|
||
|
|
session[kTxnNumberIncrement] = 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, options)) {
|
||
|
|
command.readConcern = command.readConcern || {};
|
||
|
|
Object.assign(command.readConcern, { afterClusterTime: session.operationTime });
|
||
|
|
}
|
||
|
|
else if (session[kSnapshotEnabled]) {
|
||
|
|
command.readConcern = command.readConcern || { level: read_concern_1.ReadConcernLevel.snapshot };
|
||
|
|
if (session[kSnapshotTime] != null) {
|
||
|
|
Object.assign(command.readConcern, { atClusterTime: session[kSnapshotTime] });
|
||
|
|
}
|
||
|
|
}
|
||
|
|
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) {
|
||
|
|
session.transaction.transition(transactions_1.TxnState.TRANSACTION_IN_PROGRESS);
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
exports.applySession = applySession;
|
||
|
|
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?.[kSnapshotEnabled] && session[kSnapshotTime] == null) {
|
||
|
|
// find and aggregate commands return atClusterTime on the cursor
|
||
|
|
// distinct includes it in the response body
|
||
|
|
const atClusterTime = document.cursor?.atClusterTime || document.atClusterTime;
|
||
|
|
if (atClusterTime) {
|
||
|
|
session[kSnapshotTime] = atClusterTime;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
exports.updateSessionFromResponse = updateSessionFromResponse;
|
||
|
|
//# sourceMappingURL=sessions.js.map
|