'use strict';
const Server = require('./server');
const Cursor = require('../cursor');
const MongoError = require('mongodb-core').MongoError;
const TopologyBase = require('./topology_base').TopologyBase;
const Store = require('./topology_base').Store;
const CReplSet = require('mongodb-core').ReplSet;
const MAX_JS_INT = require('../utils').MAX_JS_INT;
const translateOptions = require('../utils').translateOptions;
const filterOptions = require('../utils').filterOptions;
const mergeOptions = require('../utils').mergeOptions;
/**
* @fileOverview The **ReplSet** class is a class that represents a Replicaset topology and is
* used to construct connections.
*
* **ReplSet Should not be used, use MongoClient.connect**
*/
// Allowed parameters
var legalOptionNames = [
'ha',
'haInterval',
'replicaSet',
'rs_name',
'secondaryAcceptableLatencyMS',
'connectWithNoPrimary',
'poolSize',
'ssl',
'checkServerIdentity',
'sslValidate',
'sslCA',
'sslCert',
'ciphers',
'ecdhCurve',
'sslCRL',
'sslKey',
'sslPass',
'socketOptions',
'bufferMaxEntries',
'store',
'auto_reconnect',
'autoReconnect',
'emitError',
'keepAlive',
'keepAliveInitialDelay',
'noDelay',
'connectTimeoutMS',
'socketTimeoutMS',
'strategy',
'debug',
'family',
'loggerLevel',
'logger',
'reconnectTries',
'appname',
'domainsEnabled',
'servername',
'promoteLongs',
'promoteValues',
'promoteBuffers',
'maxStalenessSeconds',
'promiseLibrary',
'minSize',
'monitorCommands'
];
/**
* Creates a new ReplSet instance
* @class
* @deprecated
* @param {Server[]} servers A seedlist of servers participating in the replicaset.
* @param {object} [options] Optional settings.
* @param {boolean} [options.ha=true] Turn on high availability monitoring.
* @param {number} [options.haInterval=10000] Time between each replicaset status check.
* @param {string} [options.replicaSet] The name of the replicaset to connect to.
* @param {number} [options.secondaryAcceptableLatencyMS=15] Sets the range of servers to pick when using NEAREST (lowest ping ms + the latency fence, ex: range of 1 to (1 + 15) ms)
* @param {boolean} [options.connectWithNoPrimary=false] Sets if the driver should connect even if no primary is available
* @param {number} [options.poolSize=5] Number of connections in the connection pool for each server instance, set to 5 as default for legacy reasons.
* @param {boolean} [options.ssl=false] Use ssl connection (needs to have a mongod server with ssl support)
* @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.
* @param {boolean} [options.sslValidate=true] Validate mongod server certificate against ca (needs to have a mongod server with ssl support, 2.4 or higher)
* @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)
* @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)
* @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.
* @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.
* @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.
* @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)
* @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)
* @param {string} [options.servername] String containing the server name requested via TLS SNI.
* @param {object} [options.socketOptions] Socket options
* @param {boolean} [options.socketOptions.noDelay=true] TCP Socket NoDelay option.
* @param {boolean} [options.socketOptions.keepAlive=true] TCP Connection keep alive enabled
* @param {number} [options.socketOptions.keepAliveInitialDelay=30000] The number of milliseconds to wait before initiating keepAlive on the TCP socket
* @param {number} [options.socketOptions.connectTimeoutMS=10000] TCP Connection timeout setting
* @param {number} [options.socketOptions.socketTimeoutMS=0] TCP Socket timeout setting
* @param {boolean} [options.domainsEnabled=false] Enable the wrapping of the callback in the current domain, disabled by default to avoid perf hit.
* @param {number} [options.maxStalenessSeconds=undefined] The max staleness to secondary reads (values under 10 seconds cannot be guaranteed);
* @param {boolean} [options.monitorCommands=false] Enable command monitoring for this topology
* @fires ReplSet#connect
* @fires ReplSet#ha
* @fires ReplSet#joined
* @fires ReplSet#left
* @fires ReplSet#fullsetup
* @fires ReplSet#open
* @fires ReplSet#close
* @fires ReplSet#error
* @fires ReplSet#timeout
* @fires ReplSet#parseError
* @fires ReplSet#commandStarted
* @fires ReplSet#commandSucceeded
* @fires ReplSet#commandFailed
* @property {string} parserType the parser type used (c++ or js).
* @return {ReplSet} a ReplSet instance.
*/
class ReplSet extends TopologyBase {
constructor(servers, options) {
super();
options = options || {};
var self = this;
// Filter the options
options = filterOptions(options, legalOptionNames);
// Ensure all the instances are Server
for (var i = 0; i < servers.length; i++) {
if (!(servers[i] instanceof Server)) {
throw MongoError.create({
message: 'all seed list instances must be of the Server type',
driver: true
});
}
}
// Stored options
var storeOptions = {
force: false,
bufferMaxEntries:
typeof options.bufferMaxEntries === 'number' ? options.bufferMaxEntries : MAX_JS_INT
};
// Shared global store
var store = options.store || new Store(self, storeOptions);
// Build seed list
var seedlist = servers.map(function(x) {
return { host: x.host, port: x.port };
});
// Clone options
var clonedOptions = mergeOptions(
{},
{
disconnectHandler: store,
cursorFactory: Cursor,
reconnect: false,
emitError: typeof options.emitError === 'boolean' ? options.emitError : true,
size: typeof options.poolSize === 'number' ? options.poolSize : 5,
monitorCommands:
typeof options.monitorCommands === 'boolean' ? options.monitorCommands : false
}
);
// Translate any SSL options and other connectivity options
clonedOptions = translateOptions(clonedOptions, options);
// Socket options
var socketOptions =
options.socketOptions && Object.keys(options.socketOptions).length > 0
? options.socketOptions
: options;
// Translate all the options to the mongodb-core ones
clonedOptions = translateOptions(clonedOptions, socketOptions);
// Build default client information
clonedOptions.clientInfo = this.clientInfo;
// Do we have an application specific string
if (options.appname) {
clonedOptions.clientInfo.application = { name: options.appname };
}
// Create the ReplSet
var coreTopology = new CReplSet(seedlist, clonedOptions);
// Listen to reconnect event
coreTopology.on('reconnect', function() {
self.emit('reconnect');
store.execute();
});
// Internal state
this.s = {
// Replicaset
coreTopology: coreTopology,
// Server capabilities
sCapabilities: null,
// Debug tag
tag: options.tag,
// Store options
storeOptions: storeOptions,
// Cloned options
clonedOptions: clonedOptions,
// Store
store: store,
// Options
options: options,
// Server Session Pool
sessionPool: null,
// Active client sessions
sessions: [],
// Promise library
promiseLibrary: options.promiseLibrary || Promise
};
// Debug
if (clonedOptions.debug) {
// Last ismaster
Object.defineProperty(this, 'replset', {
enumerable: true,
get: function() {
return coreTopology;
}
});
}
}
// Connect method
connect(_options, callback) {
var self = this;
if ('function' === typeof _options) (callback = _options), (_options = {});
if (_options == null) _options = {};
if (!('function' === typeof callback)) callback = null;
_options = Object.assign({}, this.s.clonedOptions, _options);
self.s.options = _options;
// Update bufferMaxEntries
self.s.storeOptions.bufferMaxEntries =
typeof _options.bufferMaxEntries === 'number' ? _options.bufferMaxEntries : -1;
// Actual handler
var errorHandler = function(event) {
return function(err) {
if (event !== 'error') {
self.emit(event, err);
}
};
};
// Clear out all the current handlers left over
var events = [
'timeout',
'error',
'close',
'serverOpening',
'serverDescriptionChanged',
'serverHeartbeatStarted',
'serverHeartbeatSucceeded',
'serverHeartbeatFailed',
'serverClosed',
'topologyOpening',
'topologyClosed',
'topologyDescriptionChanged',
'commandStarted',
'commandSucceeded',
'commandFailed',
'joined',
'left',
'ping',
'ha'
];
events.forEach(function(e) {
self.s.coreTopology.removeAllListeners(e);
});
// relay the event
var relay = function(event) {
return function(t, server) {
self.emit(event, t, server);
};
};
// Replset events relay
var replsetRelay = function(event) {
return function(t, server) {
self.emit(event, t, server.lastIsMaster(), server);
};
};
// Relay ha
var relayHa = function(t, state) {
self.emit('ha', t, state);
if (t === 'start') {
self.emit('ha_connect', t, state);
} else if (t === 'end') {
self.emit('ha_ismaster', t, state);
}
};
// Set up serverConfig listeners
self.s.coreTopology.on('joined', replsetRelay('joined'));
self.s.coreTopology.on('left', relay('left'));
self.s.coreTopology.on('ping', relay('ping'));
self.s.coreTopology.on('ha', relayHa);
// Set up SDAM listeners
self.s.coreTopology.on('serverDescriptionChanged', relay('serverDescriptionChanged'));
self.s.coreTopology.on('serverHeartbeatStarted', relay('serverHeartbeatStarted'));
self.s.coreTopology.on('serverHeartbeatSucceeded', relay('serverHeartbeatSucceeded'));
self.s.coreTopology.on('serverHeartbeatFailed', relay('serverHeartbeatFailed'));
self.s.coreTopology.on('serverOpening', relay('serverOpening'));
self.s.coreTopology.on('serverClosed', relay('serverClosed'));
self.s.coreTopology.on('topologyOpening', relay('topologyOpening'));
self.s.coreTopology.on('topologyClosed', relay('topologyClosed'));
self.s.coreTopology.on('topologyDescriptionChanged', relay('topologyDescriptionChanged'));
self.s.coreTopology.on('commandStarted', relay('commandStarted'));
self.s.coreTopology.on('commandSucceeded', relay('commandSucceeded'));
self.s.coreTopology.on('commandFailed', relay('commandFailed'));
self.s.coreTopology.on('fullsetup', function() {
self.emit('fullsetup', self, self);
});
self.s.coreTopology.on('all', function() {
self.emit('all', null, self);
});
// Connect handler
var connectHandler = function() {
// Set up listeners
self.s.coreTopology.once('timeout', errorHandler('timeout'));
self.s.coreTopology.once('error', errorHandler('error'));
self.s.coreTopology.once('close', errorHandler('close'));
// Emit open event
self.emit('open', null, self);
// Return correctly
try {
callback(null, self);
} catch (err) {
process.nextTick(function() {
throw err;
});
}
};
// Error handler
var connectErrorHandler = function() {
return function(err) {
['timeout', 'error', 'close'].forEach(function(e) {
self.s.coreTopology.removeListener(e, connectErrorHandler);
});
self.s.coreTopology.removeListener('connect', connectErrorHandler);
// Destroy the replset
self.s.coreTopology.destroy();
// Try to callback
try {
callback(err);
} catch (err) {
if (!self.s.coreTopology.isConnected())
process.nextTick(function() {
throw err;
});
}
};
};
// Set up listeners
self.s.coreTopology.once('timeout', connectErrorHandler('timeout'));
self.s.coreTopology.once('error', connectErrorHandler('error'));
self.s.coreTopology.once('close', connectErrorHandler('close'));
self.s.coreTopology.once('connect', connectHandler);
// Start connection
self.s.coreTopology.connect(_options);
}
close(forceClosed) {
super.close(forceClosed);
['timeout', 'error', 'close', 'joined', 'left'].forEach(e => this.removeAllListeners(e));
}
}
Object.defineProperty(ReplSet.prototype, 'haInterval', {
enumerable: true,
get: function() {
return this.s.coreTopology.s.haInterval;
}
});
/**
* A replset connect event, used to verify that the connection is up and running
*
* @event ReplSet#connect
* @type {ReplSet}
*/
/**
* The replset high availability event
*
* @event ReplSet#ha
* @type {function}
* @param {string} type The stage in the high availability event (start|end)
* @param {boolean} data.norepeat This is a repeating high availability process or a single execution only
* @param {number} data.id The id for this high availability request
* @param {object} data.state An object containing the information about the current replicaset
*/
/**
* A server member left the replicaset
*
* @event ReplSet#left
* @type {function}
* @param {string} type The type of member that left (primary|secondary|arbiter)
* @param {Server} server The server object that left
*/
/**
* A server member joined the replicaset
*
* @event ReplSet#joined
* @type {function}
* @param {string} type The type of member that joined (primary|secondary|arbiter)
* @param {Server} server The server object that joined
*/
/**
* ReplSet open event, emitted when replicaset can start processing commands.
*
* @event ReplSet#open
* @type {Replset}
*/
/**
* ReplSet fullsetup event, emitted when all servers in the topology have been connected to.
*
* @event ReplSet#fullsetup
* @type {Replset}
*/
/**
* ReplSet close event
*
* @event ReplSet#close
* @type {object}
*/
/**
* ReplSet error event, emitted if there is an error listener.
*
* @event ReplSet#error
* @type {MongoError}
*/
/**
* ReplSet timeout event
*
* @event ReplSet#timeout
* @type {object}
*/
/**
* ReplSet parseError event
*
* @event ReplSet#parseError
* @type {object}
*/
/**
* An event emitted indicating a command was started, if command monitoring is enabled
*
* @event ReplSet#commandStarted
* @type {object}
*/
/**
* An event emitted indicating a command succeeded, if command monitoring is enabled
*
* @event ReplSet#commandSucceeded
* @type {object}
*/
/**
* An event emitted indicating a command failed, if command monitoring is enabled
*
* @event ReplSet#commandFailed
* @type {object}
*/
module.exports = ReplSet;