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"use strict";
var _a;
Object.defineProperty(exports, "__esModule", { value: true });
exports.updateSessionFromResponse = exports.applySession = exports.commandSupportsReadConcern = exports.ServerSessionPool = exports.ServerSession = exports.maybeClearPinnedConnection = exports.ClientSession = void 0;
const promise_provider_1 = require("./promise_provider");
const bson_1 = require("./bson");
const read_preference_1 = require("./read_preference");
const transactions_1 = require("./transactions");
const common_1 = require("./sdam/common");
const shared_1 = require("./cmap/wire_protocol/shared");
const error_1 = require("./error");
const utils_1 = require("./utils");
const execute_operation_1 = require("./operations/execute_operation");
const run_command_1 = require("./operations/run_command");
const connection_1 = require("./cmap/connection");
const metrics_1 = require("./cmap/metrics");
const mongo_types_1 = require("./mongo_types");
const read_concern_1 = require("./read_concern");
const minWireVersionForShardedTransactions = 8;
function assertAlive(session, callback) {
if (session.serverSession == null) {
const error = new error_1.MongoExpiredSessionError();
if (typeof callback === 'function') {
callback(error);
return false;
}
throw error;
}
return true;
}
/** @internal */
const kServerSession = Symbol('serverSession');
/** @internal */
const kSnapshotTime = Symbol('snapshotTime');
/** @internal */
const kSnapshotEnabled = Symbol('snapshotEnabled');
/** @internal */
const kPinnedConnection = Symbol('pinnedConnection');
/**
* A class representing a client session on the server
*
* NOTE: not meant to be instantiated directly.
* @public
*/
class ClientSession extends mongo_types_1.TypedEventEmitter {
/**
* Create a client session.
* @internal
* @param topology - The current client's topology (Internal Class)
* @param sessionPool - The server session pool (Internal Class)
* @param options - Optional settings
* @param clientOptions - Optional settings provided when creating a MongoClient
*/
constructor(topology, sessionPool, options, clientOptions) {
super();
/** @internal */
this[_a] = false;
if (topology == null) {
// TODO(NODE-3483)
throw new error_1.MongoRuntimeError('ClientSession requires a topology');
}
if (sessionPool == null || !(sessionPool instanceof ServerSessionPool)) {
// TODO(NODE-3483)
throw new error_1.MongoRuntimeError('ClientSession requires a ServerSessionPool');
}
options = options !== null && options !== void 0 ? options : {};
if (options.snapshot === true) {
this[kSnapshotEnabled] = true;
if (options.causalConsistency === true) {
throw new error_1.MongoInvalidArgumentError('Properties "causalConsistency" and "snapshot" are mutually exclusive');
}
}
this.topology = topology;
this.sessionPool = sessionPool;
this.hasEnded = false;
this.clientOptions = clientOptions;
this[kServerSession] = undefined;
this.supports = {
causalConsistency: options.snapshot !== true && options.causalConsistency !== false
};
this.clusterTime = options.initialClusterTime;
this.operationTime = undefined;
this.explicit = !!options.explicit;
this.owner = options.owner;
this.defaultTransactionOptions = Object.assign({}, options.defaultTransactionOptions);
this.transaction = new transactions_1.Transaction();
}
/** The server id associated with this session */
get id() {
var _b;
return (_b = this.serverSession) === null || _b === void 0 ? void 0 : _b.id;
}
get serverSession() {
if (this[kServerSession] == null) {
this[kServerSession] = this.sessionPool.acquire();
}
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
return this[kServerSession];
}
/** Whether or not this session is configured for snapshot reads */
get snapshotEnabled() {
return this[kSnapshotEnabled];
}
get loadBalanced() {
return this.topology.description.type === common_1.TopologyType.LoadBalanced;
}
/** @internal */
get pinnedConnection() {
return this[kPinnedConnection];
}
/** @internal */
pin(conn) {
if (this[kPinnedConnection]) {
throw TypeError('Cannot pin multiple connections to the same session');
}
this[kPinnedConnection] = conn;
conn.emit(connection_1.Connection.PINNED, this.inTransaction() ? metrics_1.ConnectionPoolMetrics.TXN : metrics_1.ConnectionPoolMetrics.CURSOR);
}
/** @internal */
unpin(options) {
if (this.loadBalanced) {
return maybeClearPinnedConnection(this, options);
}
this.transaction.unpinServer();
}
get isPinned() {
return this.loadBalanced ? !!this[kPinnedConnection] : this.transaction.isPinned;
}
endSession(options, callback) {
if (typeof options === 'function')
(callback = options), (options = {});
const finalOptions = { force: true, ...options };
return (0, utils_1.maybePromise)(callback, done => {
if (this.hasEnded) {
maybeClearPinnedConnection(this, finalOptions);
return done();
}
const completeEndSession = () => {
maybeClearPinnedConnection(this, finalOptions);
// release the server session back to the pool
this.sessionPool.release(this.serverSession);
this[kServerSession] = undefined;
// mark the session as ended, and emit a signal
this.hasEnded = true;
this.emit('ended', this);
// spec indicates that we should ignore all errors for `endSessions`
done();
};
if (this.serverSession && this.inTransaction()) {
this.abortTransaction(err => {
if (err)
return done(err);
completeEndSession();
});
return;
}
completeEndSession();
});
}
/**
* Advances the operationTime for a ClientSession.
*
* @param operationTime - the `BSON.Timestamp` of the operation type it is desired to advance to
*/
advanceOperationTime(operationTime) {
if (this.operationTime == null) {
this.operationTime = operationTime;
return;
}
if (operationTime.greaterThan(this.operationTime)) {
this.operationTime = operationTime;
}
}
/**
* Advances the clusterTime for a ClientSession to the provided clusterTime of another ClientSession
*
* @param clusterTime - the $clusterTime returned by the server from another session in the form of a document containing the `BSON.Timestamp` clusterTime and signature
*/
advanceClusterTime(clusterTime) {
var _b, _c;
if (!clusterTime || typeof clusterTime !== 'object') {
throw new error_1.MongoInvalidArgumentError('input cluster time must be an object');
}
if (!clusterTime.clusterTime || clusterTime.clusterTime._bsontype !== 'Timestamp') {
throw new error_1.MongoInvalidArgumentError('input cluster time "clusterTime" property must be a valid BSON Timestamp');
}
if (!clusterTime.signature ||
((_b = clusterTime.signature.hash) === null || _b === void 0 ? void 0 : _b._bsontype) !== 'Binary' ||
(typeof clusterTime.signature.keyId !== 'number' &&
((_c = clusterTime.signature.keyId) === null || _c === void 0 ? void 0 : _c._bsontype) !== 'Long') // apparently we decode the key to number?
) {
throw new error_1.MongoInvalidArgumentError('input cluster time must have a valid "signature" property with BSON Binary hash and BSON Long keyId');
}
(0, common_1._advanceClusterTime)(this, clusterTime);
}
/**
* Used to determine if this session equals another
*
* @param session - The session to compare to
*/
equals(session) {
if (!(session instanceof ClientSession)) {
return false;
}
if (this.id == null || session.id == null) {
return false;
}
return this.id.id.buffer.equals(session.id.id.buffer);
}
/** Increment the transaction number on the internal ServerSession */
incrementTransactionNumber() {
if (this.serverSession) {
this.serverSession.txnNumber =
typeof this.serverSession.txnNumber === 'number' ? this.serverSession.txnNumber + 1 : 0;
}
}
/** @returns whether this session is currently in a transaction or not */
inTransaction() {
return this.transaction.isActive;
}
/**
* Starts a new transaction with the given options.
*
* @param options - Options for the transaction
*/
startTransaction(options) {
var _b, _c, _d, _e, _f, _g, _h, _j, _k, _l;
if (this[kSnapshotEnabled]) {
throw new error_1.MongoCompatibilityError('Transactions are not allowed with snapshot sessions');
}
assertAlive(this);
if (this.inTransaction()) {
throw new error_1.MongoTransactionError('Transaction already in progress');
}
if (this.isPinned && this.transaction.isCommitted) {
this.unpin();
}
const topologyMaxWireVersion = (0, utils_1.maxWireVersion)(this.topology);
if ((0, shared_1.isSharded)(this.topology) &&
topologyMaxWireVersion != null &&
topologyMaxWireVersion < minWireVersionForShardedTransactions) {
throw new error_1.MongoCompatibilityError('Transactions are not supported on sharded clusters in MongoDB < 4.2.');
}
// increment txnNumber
this.incrementTransactionNumber();
// create transaction state
this.transaction = new transactions_1.Transaction({
readConcern: (_c = (_b = options === null || options === void 0 ? void 0 : options.readConcern) !== null && _b !== void 0 ? _b : this.defaultTransactionOptions.readConcern) !== null && _c !== void 0 ? _c : (_d = this.clientOptions) === null || _d === void 0 ? void 0 : _d.readConcern,
writeConcern: (_f = (_e = options === null || options === void 0 ? void 0 : options.writeConcern) !== null && _e !== void 0 ? _e : this.defaultTransactionOptions.writeConcern) !== null && _f !== void 0 ? _f : (_g = this.clientOptions) === null || _g === void 0 ? void 0 : _g.writeConcern,
readPreference: (_j = (_h = options === null || options === void 0 ? void 0 : options.readPreference) !== null && _h !== void 0 ? _h : this.defaultTransactionOptions.readPreference) !== null && _j !== void 0 ? _j : (_k = this.clientOptions) === null || _k === void 0 ? void 0 : _k.readPreference,
maxCommitTimeMS: (_l = options === null || options === void 0 ? void 0 : options.maxCommitTimeMS) !== null && _l !== void 0 ? _l : this.defaultTransactionOptions.maxCommitTimeMS
});
this.transaction.transition(transactions_1.TxnState.STARTING_TRANSACTION);
}
commitTransaction(callback) {
return (0, utils_1.maybePromise)(callback, cb => endTransaction(this, 'commitTransaction', cb));
}
abortTransaction(callback) {
return (0, utils_1.maybePromise)(callback, cb => endTransaction(this, 'abortTransaction', cb));
}
/**
* This is here to ensure that ClientSession is never serialized to BSON.
*/
toBSON() {
throw new error_1.MongoRuntimeError('ClientSession cannot be serialized to BSON.');
}
/**
* Runs a provided lambda within a transaction, retrying either the commit operation
* or entire transaction as needed (and when the error permits) to better ensure that
* the transaction can complete successfully.
*
* IMPORTANT: This method requires the user to return a Promise, all lambdas that do not
* return a Promise will result in undefined behavior.
*
* @param fn - A lambda to run within a transaction
* @param options - Optional settings for the transaction
*/
withTransaction(fn, options) {
const startTime = (0, utils_1.now)();
return attemptTransaction(this, startTime, fn, options);
}
}
exports.ClientSession = ClientSession;
_a = kSnapshotEnabled;
const MAX_WITH_TRANSACTION_TIMEOUT = 120000;
const NON_DETERMINISTIC_WRITE_CONCERN_ERRORS = new Set([
'CannotSatisfyWriteConcern',
'UnknownReplWriteConcern',
'UnsatisfiableWriteConcern'
]);
function hasNotTimedOut(startTime, max) {
return (0, utils_1.calculateDurationInMs)(startTime) < max;
}
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[kPinnedConnection];
const error = options === null || options === void 0 ? void 0 : options.error;
if (session.inTransaction() &&
error &&
error instanceof error_1.MongoError &&
error.hasErrorLabel('TransientTransactionError')) {
return;
}
// 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) {
const servers = Array.from(session.topology.s.servers.values());
const loadBalancer = servers[0];
if ((options === null || options === void 0 ? void 0 : options.error) == null || (options === null || options === void 0 ? void 0 : options.force)) {
loadBalancer.s.pool.checkIn(conn);
conn.emit(connection_1.Connection.UNPINNED, session.transaction.state !== transactions_1.TxnState.NO_TRANSACTION
? metrics_1.ConnectionPoolMetrics.TXN
: metrics_1.ConnectionPoolMetrics.CURSOR);
if (options === null || options === void 0 ? void 0 : options.forceClear) {
loadBalancer.s.pool.clear(conn.serviceId);
}
}
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('UnknownTransactionCommitResult')) {
return attemptTransactionCommit(session, startTime, fn, options);
}
if (err.hasErrorLabel('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) {
const Promise = promise_provider_1.PromiseProvider.get();
session.startTransaction(options);
let promise;
try {
promise = fn(session);
}
catch (err) {
promise = Promise.reject(err);
}
if (!(0, utils_1.isPromiseLike)(promise)) {
session.abortTransaction();
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('TransientTransactionError') &&
hasNotTimedOut(startTime, MAX_WITH_TRANSACTION_TIMEOUT)) {
return attemptTransaction(session, startTime, fn, options);
}
if (isMaxTimeMSExpiredError(err)) {
err.addErrorLabel('UnknownTransactionCommitResult');
}
throw err;
}
if (session.transaction.isActive) {
return session.abortTransaction().then(() => maybeRetryOrThrow(err));
}
return maybeRetryOrThrow(err);
});
}
function endTransaction(session, commandName, callback) {
if (!assertAlive(session, callback)) {
// checking result in case callback was called
return;
}
// 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(e, r) {
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 (e) {
if (e instanceof error_1.MongoNetworkError ||
e instanceof error_1.MongoWriteConcernError ||
(0, error_1.isRetryableError)(e) ||
isMaxTimeMSExpiredError(e)) {
if (isUnknownTransactionCommitResult(e)) {
e.addErrorLabel('UnknownTransactionCommitResult');
// per txns spec, must unpin session in this case
session.unpin({ error: e });
}
}
else if (e.hasErrorLabel('TransientTransactionError')) {
session.unpin({ error: e });
}
}
callback(e, r);
}
// Assumption here that commandName is "commitTransaction" or "abortTransaction"
if (session.transaction.recoveryToken) {
command.recoveryToken = session.transaction.recoveryToken;
}
// send the command
(0, execute_operation_1.executeOperation)(session.topology, new run_command_1.RunAdminCommandOperation(undefined, command, {
session,
readPreference: read_preference_1.ReadPreference.primary,
bypassPinningCheck: true
}), (err, reply) => {
if (command.abortTransaction) {
// always unpin on abort regardless of command outcome
session.unpin();
}
if (err && (0, error_1.isRetryableError)(err)) {
// 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.topology, new run_command_1.RunAdminCommandOperation(undefined, command, {
session,
readPreference: read_preference_1.ReadPreference.primary,
bypassPinningCheck: true
}), (_err, _reply) => commandHandler(_err, _reply));
}
commandHandler(err, reply);
});
}
/**
* 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;
}
}
exports.ServerSession = ServerSession;
/**
* Maintains a pool of Server Sessions.
* For internal use only
* @internal
*/
class ServerSessionPool {
constructor(topology) {
if (topology == null) {
throw new error_1.MongoRuntimeError('ServerSessionPool requires a topology');
}
this.topology = topology;
this.sessions = [];
}
/** Ends all sessions in the session pool */
endAllPooledSessions(callback) {
if (this.sessions.length) {
this.topology.endSessions(this.sessions.map((session) => session.id), () => {
this.sessions = [];
if (typeof callback === 'function') {
callback();
}
});
return;
}
if (typeof callback === 'function') {
callback();
}
}
/**
* 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.topology.logicalSessionTimeoutMinutes || 10;
while (this.sessions.length) {
const session = this.sessions.shift();
if (session && (this.topology.loadBalanced || !session.hasTimedOut(sessionTimeoutMinutes))) {
return session;
}
}
return new ServerSession();
}
/**
* 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.topology.logicalSessionTimeoutMinutes;
if (this.topology.loadBalanced && !sessionTimeoutMinutes) {
this.sessions.unshift(session);
}
if (!sessionTimeoutMinutes) {
return;
}
while (this.sessions.length) {
const pooledSession = this.sessions[this.sessions.length - 1];
if (pooledSession.hasTimedOut(sessionTimeoutMinutes)) {
this.sessions.pop();
}
else {
break;
}
}
if (!session.hasTimedOut(sessionTimeoutMinutes)) {
if (session.isDirty) {
return;
}
// otherwise, readd this session to the session pool
this.sessions.unshift(session);
}
}
}
exports.ServerSessionPool = ServerSessionPool;
// TODO: this should be codified in command construction
// @see https://github.com/mongodb/specifications/blob/master/source/read-write-concern/read-write-concern.rst#read-concern
function commandSupportsReadConcern(command, options) {
if (command.aggregate || command.count || command.distinct || command.find || command.geoNear) {
return true;
}
if (command.mapReduce &&
options &&
options.out &&
(options.out.inline === 1 || options.out === 'inline')) {
return true;
}
return false;
}
exports.commandSupportsReadConcern = commandSupportsReadConcern;
/**
* 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
*/
function applySession(session, command, options) {
var _b;
// TODO: merge this with `assertAlive`, did not want to throw a try/catch here
if (session.hasEnded) {
return new error_1.MongoExpiredSessionError();
}
const serverSession = session.serverSession;
if (serverSession == null) {
return new error_1.MongoRuntimeError('Unable to acquire server session');
}
// SPEC-1019: silently ignore explicit session with unacknowledged write for backwards compatibility
// FIXME: NODE-2781, this check for write concern shouldn't be happening here, but instead during command construction
if (options && options.writeConcern && options.writeConcern.w === 0) {
if (session && session.explicit) {
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;
// first apply non-transaction-specific sessions data
const inTransaction = session.inTransaction() || (0, transactions_1.isTransactionCommand)(command);
const isRetryableWrite = (options === null || options === void 0 ? void 0 : options.willRetryWrite) || false;
if (serverSession.txnNumber && (isRetryableWrite || inTransaction)) {
command.txnNumber = bson_1.Long.fromNumber(serverSession.txnNumber);
}
if (!inTransaction) {
if (session.transaction.state !== transactions_1.TxnState.NO_TRANSACTION) {
session.transaction.transition(transactions_1.TxnState.NO_TRANSACTION);
}
if (session.supports.causalConsistency &&
session.operationTime &&
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 || ((_b = session === null || session === void 0 ? void 0 : session.clientOptions) === null || _b === void 0 ? void 0 : _b.readConcern);
if (readConcern) {
command.readConcern = readConcern;
}
if (session.supports.causalConsistency && session.operationTime) {
command.readConcern = command.readConcern || {};
Object.assign(command.readConcern, { afterClusterTime: session.operationTime });
}
}
}
exports.applySession = applySession;
function updateSessionFromResponse(session, document) {
var _b;
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 === null || session === void 0 ? void 0 : session[kSnapshotEnabled]) && session[kSnapshotTime] == null) {
// find and aggregate commands return atClusterTime on the cursor
// distinct includes it in the response body
const atClusterTime = ((_b = document.cursor) === null || _b === void 0 ? void 0 : _b.atClusterTime) || document.atClusterTime;
if (atClusterTime) {
session[kSnapshotTime] = atClusterTime;
}
}
}
exports.updateSessionFromResponse = updateSessionFromResponse;
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