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This commit is contained in:
452
node_modules/mongodb/lib/topologies/mongos.js
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452
node_modules/mongodb/lib/topologies/mongos.js
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'use strict';
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const TopologyBase = require('./topology_base').TopologyBase;
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const MongoError = require('mongodb-core').MongoError;
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const CMongos = require('mongodb-core').Mongos;
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const Cursor = require('../cursor');
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const Server = require('./server');
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const Store = require('./topology_base').Store;
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const MAX_JS_INT = require('../utils').MAX_JS_INT;
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const translateOptions = require('../utils').translateOptions;
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const filterOptions = require('../utils').filterOptions;
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const mergeOptions = require('../utils').mergeOptions;
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/**
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* @fileOverview The **Mongos** class is a class that represents a Mongos Proxy topology and is
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* used to construct connections.
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*
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* **Mongos Should not be used, use MongoClient.connect**
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*/
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// Allowed parameters
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var legalOptionNames = [
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'ha',
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'haInterval',
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'acceptableLatencyMS',
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'poolSize',
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'ssl',
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'checkServerIdentity',
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'sslValidate',
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'sslCA',
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'sslCRL',
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'sslCert',
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'ciphers',
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'ecdhCurve',
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'sslKey',
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'sslPass',
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'socketOptions',
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'bufferMaxEntries',
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'store',
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'auto_reconnect',
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'autoReconnect',
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'emitError',
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'keepAlive',
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'keepAliveInitialDelay',
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'noDelay',
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'connectTimeoutMS',
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'socketTimeoutMS',
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'loggerLevel',
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'logger',
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'reconnectTries',
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'appname',
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'domainsEnabled',
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'servername',
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'promoteLongs',
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'promoteValues',
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'promoteBuffers',
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'promiseLibrary',
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'monitorCommands'
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];
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/**
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* Creates a new Mongos instance
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* @class
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* @deprecated
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* @param {Server[]} servers A seedlist of servers participating in the replicaset.
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* @param {object} [options] Optional settings.
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* @param {booelan} [options.ha=true] Turn on high availability monitoring.
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* @param {number} [options.haInterval=5000] Time between each replicaset status check.
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* @param {number} [options.poolSize=5] Number of connections in the connection pool for each server instance, set to 5 as default for legacy reasons.
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* @param {number} [options.acceptableLatencyMS=15] Cutoff latency point in MS for MongoS proxy selection
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* @param {boolean} [options.ssl=false] Use ssl connection (needs to have a mongod server with ssl support)
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* @param {boolean|function} [options.checkServerIdentity=true] Ensure we check server identify during SSL, set to false to disable checking. Only works for Node 0.12.x or higher. You can pass in a boolean or your own checkServerIdentity override function.
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* @param {boolean} [options.sslValidate=true] Validate mongod server certificate against ca (needs to have a mongod server with ssl support, 2.4 or higher)
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* @param {array} [options.sslCA] Array of valid certificates either as Buffers or Strings (needs to have a mongod server with ssl support, 2.4 or higher)
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* @param {array} [options.sslCRL] Array of revocation certificates either as Buffers or Strings (needs to have a mongod server with ssl support, 2.4 or higher)
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* @param {string} [options.ciphers] Passed directly through to tls.createSecureContext. See https://nodejs.org/dist/latest-v9.x/docs/api/tls.html#tls_tls_createsecurecontext_options for more info.
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* @param {string} [options.ecdhCurve] Passed directly through to tls.createSecureContext. See https://nodejs.org/dist/latest-v9.x/docs/api/tls.html#tls_tls_createsecurecontext_options for more info.
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* @param {(Buffer|string)} [options.sslCert] String or buffer containing the certificate we wish to present (needs to have a mongod server with ssl support, 2.4 or higher)
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* @param {(Buffer|string)} [options.sslKey] String or buffer containing the certificate private key we wish to present (needs to have a mongod server with ssl support, 2.4 or higher)
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* @param {(Buffer|string)} [options.sslPass] String or buffer containing the certificate password (needs to have a mongod server with ssl support, 2.4 or higher)
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* @param {string} [options.servername] String containing the server name requested via TLS SNI.
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* @param {object} [options.socketOptions] Socket options
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* @param {boolean} [options.socketOptions.noDelay=true] TCP Socket NoDelay option.
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* @param {boolean} [options.socketOptions.keepAlive=true] TCP Connection keep alive enabled
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* @param {number} [options.socketOptions.keepAliveInitialDelay=30000] The number of milliseconds to wait before initiating keepAlive on the TCP socket
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* @param {number} [options.socketOptions.connectTimeoutMS=0] TCP Connection timeout setting
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* @param {number} [options.socketOptions.socketTimeoutMS=0] TCP Socket timeout setting
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* @param {boolean} [options.domainsEnabled=false] Enable the wrapping of the callback in the current domain, disabled by default to avoid perf hit.
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* @param {boolean} [options.monitorCommands=false] Enable command monitoring for this topology
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* @fires Mongos#connect
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* @fires Mongos#ha
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* @fires Mongos#joined
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* @fires Mongos#left
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* @fires Mongos#fullsetup
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* @fires Mongos#open
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* @fires Mongos#close
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* @fires Mongos#error
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* @fires Mongos#timeout
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* @fires Mongos#parseError
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* @fires Mongos#commandStarted
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* @fires Mongos#commandSucceeded
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* @fires Mongos#commandFailed
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* @property {string} parserType the parser type used (c++ or js).
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* @return {Mongos} a Mongos instance.
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*/
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class Mongos extends TopologyBase {
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constructor(servers, options) {
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super();
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options = options || {};
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var self = this;
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// Filter the options
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options = filterOptions(options, legalOptionNames);
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// Ensure all the instances are Server
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for (var i = 0; i < servers.length; i++) {
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if (!(servers[i] instanceof Server)) {
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throw MongoError.create({
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message: 'all seed list instances must be of the Server type',
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driver: true
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});
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}
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}
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// Stored options
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var storeOptions = {
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force: false,
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bufferMaxEntries:
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typeof options.bufferMaxEntries === 'number' ? options.bufferMaxEntries : MAX_JS_INT
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};
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// Shared global store
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var store = options.store || new Store(self, storeOptions);
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// Build seed list
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var seedlist = servers.map(function(x) {
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return { host: x.host, port: x.port };
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});
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// Get the reconnect option
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var reconnect = typeof options.auto_reconnect === 'boolean' ? options.auto_reconnect : true;
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reconnect = typeof options.autoReconnect === 'boolean' ? options.autoReconnect : reconnect;
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// Clone options
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var clonedOptions = mergeOptions(
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{},
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{
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disconnectHandler: store,
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cursorFactory: Cursor,
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reconnect: reconnect,
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emitError: typeof options.emitError === 'boolean' ? options.emitError : true,
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size: typeof options.poolSize === 'number' ? options.poolSize : 5,
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monitorCommands:
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typeof options.monitorCommands === 'boolean' ? options.monitorCommands : false
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}
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);
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// Translate any SSL options and other connectivity options
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clonedOptions = translateOptions(clonedOptions, options);
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// Socket options
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var socketOptions =
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options.socketOptions && Object.keys(options.socketOptions).length > 0
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? options.socketOptions
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: options;
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// Translate all the options to the mongodb-core ones
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clonedOptions = translateOptions(clonedOptions, socketOptions);
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// Build default client information
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clonedOptions.clientInfo = this.clientInfo;
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// Do we have an application specific string
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if (options.appname) {
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clonedOptions.clientInfo.application = { name: options.appname };
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}
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// Internal state
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this.s = {
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// Create the Mongos
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coreTopology: new CMongos(seedlist, clonedOptions),
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// Server capabilities
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sCapabilities: null,
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// Debug turned on
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debug: clonedOptions.debug,
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// Store option defaults
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storeOptions: storeOptions,
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// Cloned options
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clonedOptions: clonedOptions,
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// Actual store of callbacks
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store: store,
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// Options
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options: options,
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// Server Session Pool
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sessionPool: null,
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// Active client sessions
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sessions: [],
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// Promise library
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promiseLibrary: options.promiseLibrary || Promise
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};
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}
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// Connect
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connect(_options, callback) {
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var self = this;
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if ('function' === typeof _options) (callback = _options), (_options = {});
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if (_options == null) _options = {};
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if (!('function' === typeof callback)) callback = null;
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_options = Object.assign({}, this.s.clonedOptions, _options);
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self.s.options = _options;
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// Update bufferMaxEntries
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self.s.storeOptions.bufferMaxEntries =
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typeof _options.bufferMaxEntries === 'number' ? _options.bufferMaxEntries : -1;
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// Error handler
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var connectErrorHandler = function() {
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return function(err) {
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// Remove all event handlers
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var events = ['timeout', 'error', 'close'];
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events.forEach(function(e) {
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self.removeListener(e, connectErrorHandler);
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});
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self.s.coreTopology.removeListener('connect', connectErrorHandler);
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// Force close the topology
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self.close(true);
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// Try to callback
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try {
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callback(err);
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} catch (err) {
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process.nextTick(function() {
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throw err;
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});
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}
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};
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};
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// Actual handler
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var errorHandler = function(event) {
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return function(err) {
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if (event !== 'error') {
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self.emit(event, err);
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}
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};
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};
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// Error handler
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var reconnectHandler = function() {
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self.emit('reconnect');
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self.s.store.execute();
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};
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// relay the event
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var relay = function(event) {
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return function(t, server) {
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self.emit(event, t, server);
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};
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};
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// Connect handler
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var connectHandler = function() {
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// Clear out all the current handlers left over
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var events = ['timeout', 'error', 'close', 'fullsetup'];
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events.forEach(function(e) {
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self.s.coreTopology.removeAllListeners(e);
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});
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// Set up listeners
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self.s.coreTopology.on('timeout', errorHandler('timeout'));
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self.s.coreTopology.on('error', errorHandler('error'));
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self.s.coreTopology.on('close', errorHandler('close'));
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// Set up serverConfig listeners
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self.s.coreTopology.on('fullsetup', function() {
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self.emit('fullsetup', self);
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});
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// Emit open event
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self.emit('open', null, self);
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// Return correctly
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try {
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callback(null, self);
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} catch (err) {
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process.nextTick(function() {
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throw err;
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});
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}
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};
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// Clear out all the current handlers left over
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var events = [
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'timeout',
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'error',
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'close',
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'serverOpening',
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'serverDescriptionChanged',
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'serverHeartbeatStarted',
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'serverHeartbeatSucceeded',
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'serverHeartbeatFailed',
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'serverClosed',
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'topologyOpening',
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'topologyClosed',
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'topologyDescriptionChanged',
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'commandStarted',
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'commandSucceeded',
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'commandFailed'
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];
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events.forEach(function(e) {
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self.s.coreTopology.removeAllListeners(e);
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});
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// Set up SDAM listeners
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self.s.coreTopology.on('serverDescriptionChanged', relay('serverDescriptionChanged'));
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self.s.coreTopology.on('serverHeartbeatStarted', relay('serverHeartbeatStarted'));
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self.s.coreTopology.on('serverHeartbeatSucceeded', relay('serverHeartbeatSucceeded'));
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self.s.coreTopology.on('serverHeartbeatFailed', relay('serverHeartbeatFailed'));
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self.s.coreTopology.on('serverOpening', relay('serverOpening'));
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self.s.coreTopology.on('serverClosed', relay('serverClosed'));
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self.s.coreTopology.on('topologyOpening', relay('topologyOpening'));
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self.s.coreTopology.on('topologyClosed', relay('topologyClosed'));
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self.s.coreTopology.on('topologyDescriptionChanged', relay('topologyDescriptionChanged'));
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self.s.coreTopology.on('commandStarted', relay('commandStarted'));
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self.s.coreTopology.on('commandSucceeded', relay('commandSucceeded'));
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self.s.coreTopology.on('commandFailed', relay('commandFailed'));
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// Set up listeners
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self.s.coreTopology.once('timeout', connectErrorHandler('timeout'));
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self.s.coreTopology.once('error', connectErrorHandler('error'));
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self.s.coreTopology.once('close', connectErrorHandler('close'));
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self.s.coreTopology.once('connect', connectHandler);
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// Join and leave events
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self.s.coreTopology.on('joined', relay('joined'));
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self.s.coreTopology.on('left', relay('left'));
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// Reconnect server
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self.s.coreTopology.on('reconnect', reconnectHandler);
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// Start connection
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self.s.coreTopology.connect(_options);
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}
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}
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Object.defineProperty(Mongos.prototype, 'haInterval', {
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enumerable: true,
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get: function() {
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return this.s.coreTopology.s.haInterval;
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}
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});
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/**
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* A mongos connect event, used to verify that the connection is up and running
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*
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* @event Mongos#connect
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* @type {Mongos}
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*/
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/**
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* The mongos high availability event
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*
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* @event Mongos#ha
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* @type {function}
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* @param {string} type The stage in the high availability event (start|end)
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* @param {boolean} data.norepeat This is a repeating high availability process or a single execution only
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* @param {number} data.id The id for this high availability request
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* @param {object} data.state An object containing the information about the current replicaset
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*/
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/**
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* A server member left the mongos set
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*
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* @event Mongos#left
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* @type {function}
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* @param {string} type The type of member that left (primary|secondary|arbiter)
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* @param {Server} server The server object that left
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*/
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/**
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* A server member joined the mongos set
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*
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* @event Mongos#joined
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* @type {function}
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* @param {string} type The type of member that joined (primary|secondary|arbiter)
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* @param {Server} server The server object that joined
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*/
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/**
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* Mongos fullsetup event, emitted when all proxies in the topology have been connected to.
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*
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* @event Mongos#fullsetup
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* @type {Mongos}
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*/
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/**
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* Mongos open event, emitted when mongos can start processing commands.
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*
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* @event Mongos#open
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* @type {Mongos}
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*/
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/**
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* Mongos close event
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*
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* @event Mongos#close
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* @type {object}
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*/
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/**
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* Mongos error event, emitted if there is an error listener.
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*
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* @event Mongos#error
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* @type {MongoError}
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*/
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/**
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* Mongos timeout event
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*
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* @event Mongos#timeout
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* @type {object}
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*/
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/**
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* Mongos parseError event
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*
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* @event Mongos#parseError
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* @type {object}
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*/
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/**
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* An event emitted indicating a command was started, if command monitoring is enabled
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*
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* @event Mongos#commandStarted
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* @type {object}
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*/
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/**
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* An event emitted indicating a command succeeded, if command monitoring is enabled
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*
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* @event Mongos#commandSucceeded
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* @type {object}
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*/
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/**
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* An event emitted indicating a command failed, if command monitoring is enabled
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*
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* @event Mongos#commandFailed
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* @type {object}
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*/
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module.exports = Mongos;
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