369 lines
No EOL
16 KiB
JavaScript
369 lines
No EOL
16 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.Server = void 0;
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const connection_1 = require("../cmap/connection");
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const connection_pool_1 = require("../cmap/connection_pool");
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const errors_1 = require("../cmap/errors");
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const constants_1 = require("../constants");
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const error_1 = require("../error");
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const logger_1 = require("../logger");
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const mongo_types_1 = require("../mongo_types");
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const transactions_1 = require("../transactions");
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const utils_1 = require("../utils");
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const common_1 = require("./common");
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const monitor_1 = require("./monitor");
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const server_description_1 = require("./server_description");
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const stateTransition = (0, utils_1.makeStateMachine)({
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[common_1.STATE_CLOSED]: [common_1.STATE_CLOSED, common_1.STATE_CONNECTING],
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[common_1.STATE_CONNECTING]: [common_1.STATE_CONNECTING, common_1.STATE_CLOSING, common_1.STATE_CONNECTED, common_1.STATE_CLOSED],
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[common_1.STATE_CONNECTED]: [common_1.STATE_CONNECTED, common_1.STATE_CLOSING, common_1.STATE_CLOSED],
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[common_1.STATE_CLOSING]: [common_1.STATE_CLOSING, common_1.STATE_CLOSED]
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});
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/** @internal */
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class Server extends mongo_types_1.TypedEventEmitter {
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/**
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* Create a server
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*/
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constructor(topology, description, options) {
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super();
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this.serverApi = options.serverApi;
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const poolOptions = { hostAddress: description.hostAddress, ...options };
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this.s = {
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description,
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options,
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logger: new logger_1.Logger('Server'),
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state: common_1.STATE_CLOSED,
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topology,
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pool: new connection_pool_1.ConnectionPool(this, poolOptions),
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operationCount: 0
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};
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for (const event of [...constants_1.CMAP_EVENTS, ...constants_1.APM_EVENTS]) {
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this.s.pool.on(event, (e) => this.emit(event, e));
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}
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this.s.pool.on(connection_1.Connection.CLUSTER_TIME_RECEIVED, (clusterTime) => {
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this.clusterTime = clusterTime;
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});
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if (this.loadBalanced) {
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this.monitor = null;
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// monitoring is disabled in load balancing mode
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return;
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}
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// create the monitor
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// TODO(NODE-4144): Remove new variable for type narrowing
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this.monitor = new monitor_1.Monitor(this, this.s.options);
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for (const event of constants_1.HEARTBEAT_EVENTS) {
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this.monitor.on(event, (e) => this.emit(event, e));
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}
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this.monitor.on('resetServer', (error) => markServerUnknown(this, error));
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this.monitor.on(Server.SERVER_HEARTBEAT_SUCCEEDED, (event) => {
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this.emit(Server.DESCRIPTION_RECEIVED, new server_description_1.ServerDescription(this.description.hostAddress, event.reply, {
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roundTripTime: calculateRoundTripTime(this.description.roundTripTime, event.duration)
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}));
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if (this.s.state === common_1.STATE_CONNECTING) {
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stateTransition(this, common_1.STATE_CONNECTED);
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this.emit(Server.CONNECT, this);
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}
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});
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}
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get clusterTime() {
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return this.s.topology.clusterTime;
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}
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set clusterTime(clusterTime) {
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this.s.topology.clusterTime = clusterTime;
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}
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get description() {
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return this.s.description;
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}
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get name() {
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return this.s.description.address;
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}
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get autoEncrypter() {
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if (this.s.options && this.s.options.autoEncrypter) {
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return this.s.options.autoEncrypter;
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}
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return;
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}
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get loadBalanced() {
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return this.s.topology.description.type === common_1.TopologyType.LoadBalanced;
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}
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/**
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* Initiate server connect
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*/
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connect() {
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var _a;
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if (this.s.state !== common_1.STATE_CLOSED) {
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return;
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}
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stateTransition(this, common_1.STATE_CONNECTING);
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// If in load balancer mode we automatically set the server to
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// a load balancer. It never transitions out of this state and
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// has no monitor.
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if (!this.loadBalanced) {
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(_a = this.monitor) === null || _a === void 0 ? void 0 : _a.connect();
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}
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else {
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stateTransition(this, common_1.STATE_CONNECTED);
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this.emit(Server.CONNECT, this);
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}
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}
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/** Destroy the server connection */
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destroy(options, callback) {
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var _a;
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if (typeof options === 'function')
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(callback = options), (options = {});
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options = Object.assign({}, { force: false }, options);
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if (this.s.state === common_1.STATE_CLOSED) {
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if (typeof callback === 'function') {
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callback();
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}
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return;
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}
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stateTransition(this, common_1.STATE_CLOSING);
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if (!this.loadBalanced) {
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(_a = this.monitor) === null || _a === void 0 ? void 0 : _a.close();
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}
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this.s.pool.close(options, err => {
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stateTransition(this, common_1.STATE_CLOSED);
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this.emit('closed');
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if (typeof callback === 'function') {
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callback(err);
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}
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});
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}
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/**
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* Immediately schedule monitoring of this server. If there already an attempt being made
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* this will be a no-op.
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*/
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requestCheck() {
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var _a;
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if (!this.loadBalanced) {
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(_a = this.monitor) === null || _a === void 0 ? void 0 : _a.requestCheck();
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}
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}
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/**
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* Execute a command
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* @internal
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*/
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command(ns, cmd, options, callback) {
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if (callback == null) {
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throw new error_1.MongoInvalidArgumentError('Callback must be provided');
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}
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if (ns.db == null || typeof ns === 'string') {
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throw new error_1.MongoInvalidArgumentError('Namespace must not be a string');
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}
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if (this.s.state === common_1.STATE_CLOSING || this.s.state === common_1.STATE_CLOSED) {
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callback(new error_1.MongoServerClosedError());
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return;
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}
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// Clone the options
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const finalOptions = Object.assign({}, options, { wireProtocolCommand: false });
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// There are cases where we need to flag the read preference not to get sent in
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// the command, such as pre-5.0 servers attempting to perform an aggregate write
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// with a non-primary read preference. In this case the effective read preference
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// (primary) is not the same as the provided and must be removed completely.
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if (finalOptions.omitReadPreference) {
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delete finalOptions.readPreference;
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}
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const session = finalOptions.session;
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const conn = session === null || session === void 0 ? void 0 : session.pinnedConnection;
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// NOTE: This is a hack! We can't retrieve the connections used for executing an operation
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// (and prevent them from being checked back in) at the point of operation execution.
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// This should be considered as part of the work for NODE-2882
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// NOTE:
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// When incrementing operation count, it's important that we increment it before we
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// attempt to check out a connection from the pool. This ensures that operations that
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// are waiting for a connection are included in the operation count. Load balanced
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// mode will only ever have a single server, so the operation count doesn't matter.
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// Incrementing the operation count above the logic to handle load balanced mode would
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// require special logic to decrement it again, or would double increment (the load
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// balanced code makes a recursive call). Instead, we increment the count after this
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// check.
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if (this.loadBalanced && session && conn == null && isPinnableCommand(cmd, session)) {
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this.s.pool.checkOut((err, checkedOut) => {
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if (err || checkedOut == null) {
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if (callback)
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return callback(err);
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return;
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}
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session.pin(checkedOut);
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this.command(ns, cmd, finalOptions, callback);
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});
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return;
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}
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this.s.operationCount += 1;
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this.s.pool.withConnection(conn, (err, conn, cb) => {
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if (err || !conn) {
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this.s.operationCount -= 1;
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if (!err) {
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return cb(new error_1.MongoRuntimeError('Failed to create connection without error'));
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}
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if (!(err instanceof errors_1.PoolClearedError)) {
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this.handleError(err);
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}
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return cb(err);
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}
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conn.command(ns, cmd, finalOptions, makeOperationHandler(this, conn, cmd, finalOptions, (error, response) => {
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this.s.operationCount -= 1;
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cb(error, response);
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}));
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}, callback);
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}
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/**
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* Handle SDAM error
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* @internal
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*/
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handleError(error, connection) {
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if (!(error instanceof error_1.MongoError)) {
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return;
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}
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const isStaleError = error.connectionGeneration && error.connectionGeneration < this.s.pool.generation;
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if (isStaleError) {
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return;
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}
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const isNetworkNonTimeoutError = error instanceof error_1.MongoNetworkError && !(error instanceof error_1.MongoNetworkTimeoutError);
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const isNetworkTimeoutBeforeHandshakeError = (0, error_1.isNetworkErrorBeforeHandshake)(error);
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const isAuthHandshakeError = error.hasErrorLabel(error_1.MongoErrorLabel.HandshakeError);
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if (isNetworkNonTimeoutError || isNetworkTimeoutBeforeHandshakeError || isAuthHandshakeError) {
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// In load balanced mode we never mark the server as unknown and always
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// clear for the specific service id.
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if (!this.loadBalanced) {
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error.addErrorLabel(error_1.MongoErrorLabel.ResetPool);
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markServerUnknown(this, error);
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}
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else if (connection) {
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this.s.pool.clear({ serviceId: connection.serviceId });
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}
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}
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else {
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if ((0, error_1.isSDAMUnrecoverableError)(error)) {
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if (shouldHandleStateChangeError(this, error)) {
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const shouldClearPool = (0, utils_1.maxWireVersion)(this) <= 7 || (0, error_1.isNodeShuttingDownError)(error);
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if (this.loadBalanced && connection && shouldClearPool) {
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this.s.pool.clear({ serviceId: connection.serviceId });
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}
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if (!this.loadBalanced) {
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if (shouldClearPool) {
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error.addErrorLabel(error_1.MongoErrorLabel.ResetPool);
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}
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markServerUnknown(this, error);
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process.nextTick(() => this.requestCheck());
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}
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}
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}
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}
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}
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}
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exports.Server = Server;
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/** @event */
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Server.SERVER_HEARTBEAT_STARTED = constants_1.SERVER_HEARTBEAT_STARTED;
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/** @event */
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Server.SERVER_HEARTBEAT_SUCCEEDED = constants_1.SERVER_HEARTBEAT_SUCCEEDED;
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/** @event */
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Server.SERVER_HEARTBEAT_FAILED = constants_1.SERVER_HEARTBEAT_FAILED;
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/** @event */
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Server.CONNECT = constants_1.CONNECT;
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/** @event */
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Server.DESCRIPTION_RECEIVED = constants_1.DESCRIPTION_RECEIVED;
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/** @event */
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Server.CLOSED = constants_1.CLOSED;
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/** @event */
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Server.ENDED = constants_1.ENDED;
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function calculateRoundTripTime(oldRtt, duration) {
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if (oldRtt === -1) {
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return duration;
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}
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const alpha = 0.2;
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return alpha * duration + (1 - alpha) * oldRtt;
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}
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function markServerUnknown(server, error) {
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var _a;
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// Load balancer servers can never be marked unknown.
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if (server.loadBalanced) {
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return;
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}
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if (error instanceof error_1.MongoNetworkError && !(error instanceof error_1.MongoNetworkTimeoutError)) {
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(_a = server.monitor) === null || _a === void 0 ? void 0 : _a.reset();
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}
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server.emit(Server.DESCRIPTION_RECEIVED, new server_description_1.ServerDescription(server.description.hostAddress, undefined, { error }));
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}
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function isPinnableCommand(cmd, session) {
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if (session) {
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return (session.inTransaction() ||
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'aggregate' in cmd ||
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'find' in cmd ||
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'getMore' in cmd ||
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'listCollections' in cmd ||
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'listIndexes' in cmd);
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}
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return false;
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}
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function connectionIsStale(pool, connection) {
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if (connection.serviceId) {
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return (connection.generation !== pool.serviceGenerations.get(connection.serviceId.toHexString()));
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}
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return connection.generation !== pool.generation;
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}
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function shouldHandleStateChangeError(server, err) {
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const etv = err.topologyVersion;
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const stv = server.description.topologyVersion;
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return (0, server_description_1.compareTopologyVersion)(stv, etv) < 0;
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}
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function inActiveTransaction(session, cmd) {
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return session && session.inTransaction() && !(0, transactions_1.isTransactionCommand)(cmd);
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}
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/** this checks the retryWrites option passed down from the client options, it
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* does not check if the server supports retryable writes */
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function isRetryableWritesEnabled(topology) {
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return topology.s.options.retryWrites !== false;
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}
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function makeOperationHandler(server, connection, cmd, options, callback) {
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const session = options === null || options === void 0 ? void 0 : options.session;
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return function handleOperationResult(error, result) {
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if (result != null) {
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return callback(undefined, result);
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}
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if ((options === null || options === void 0 ? void 0 : options.noResponse) === true) {
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return callback(undefined, null);
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}
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if (!error) {
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return callback(new error_1.MongoUnexpectedServerResponseError('Empty response with no error'));
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}
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if (!(error instanceof error_1.MongoError)) {
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// Node.js or some other error we have not special handling for
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return callback(error);
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}
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if (connectionIsStale(server.s.pool, connection)) {
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return callback(error);
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}
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if (error instanceof error_1.MongoNetworkError) {
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if (session && !session.hasEnded && session.serverSession) {
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session.serverSession.isDirty = true;
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}
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// inActiveTransaction check handles commit and abort.
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if (inActiveTransaction(session, cmd) &&
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!error.hasErrorLabel(error_1.MongoErrorLabel.TransientTransactionError)) {
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error.addErrorLabel(error_1.MongoErrorLabel.TransientTransactionError);
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}
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if ((isRetryableWritesEnabled(server.s.topology) || (0, transactions_1.isTransactionCommand)(cmd)) &&
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(0, utils_1.supportsRetryableWrites)(server) &&
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!inActiveTransaction(session, cmd)) {
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error.addErrorLabel(error_1.MongoErrorLabel.RetryableWriteError);
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}
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}
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else {
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if ((isRetryableWritesEnabled(server.s.topology) || (0, transactions_1.isTransactionCommand)(cmd)) &&
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(0, error_1.needsRetryableWriteLabel)(error, (0, utils_1.maxWireVersion)(server)) &&
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!inActiveTransaction(session, cmd)) {
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error.addErrorLabel(error_1.MongoErrorLabel.RetryableWriteError);
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}
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}
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if (session &&
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session.isPinned &&
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error.hasErrorLabel(error_1.MongoErrorLabel.TransientTransactionError)) {
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session.unpin({ force: true });
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}
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server.handleError(error, connection);
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return callback(error);
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};
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}
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//# sourceMappingURL=server.js.map
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