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mongos.js
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mongos.js
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'use strict';
var inherits = require('util').inherits,
f = require('util').format,
EventEmitter = require('events').EventEmitter,
BasicCursor = require('../cursor'),
Logger = require('../connection/logger'),
retrieveBSON = require('../connection/utils').retrieveBSON,
MongoError = require('../error').MongoError,
Server = require('./server'),
assign = require('../utils').assign,
clone = require('./shared').clone,
diff = require('./shared').diff,
cloneOptions = require('./shared').cloneOptions,
createClientInfo = require('./shared').createClientInfo;
var BSON = retrieveBSON();
/**
* @fileOverview The **Mongos** class is a class that represents a Mongos Proxy topology and is
* used to construct connections.
*
* @example
* var Mongos = require('mongodb-core').Mongos
* , ReadPreference = require('mongodb-core').ReadPreference
* , assert = require('assert');
*
* var server = new Mongos([{host: 'localhost', port: 30000}]);
* // Wait for the connection event
* server.on('connect', function(server) {
* server.destroy();
* });
*
* // Start connecting
* server.connect();
*/
var MongoCR = require('../auth/mongocr'),
X509 = require('../auth/x509'),
Plain = require('../auth/plain'),
GSSAPI = require('../auth/gssapi'),
SSPI = require('../auth/sspi'),
ScramSHA1 = require('../auth/scram');
//
// States
var DISCONNECTED = 'disconnected';
var CONNECTING = 'connecting';
var CONNECTED = 'connected';
var UNREFERENCED = 'unreferenced';
var DESTROYED = 'destroyed';
function stateTransition(self, newState) {
var legalTransitions = {
disconnected: [CONNECTING, DESTROYED, DISCONNECTED],
connecting: [CONNECTING, DESTROYED, CONNECTED, DISCONNECTED],
connected: [CONNECTED, DISCONNECTED, DESTROYED, UNREFERENCED],
unreferenced: [UNREFERENCED, DESTROYED],
destroyed: [DESTROYED]
};
// Get current state
var legalStates = legalTransitions[self.state];
if (legalStates && legalStates.indexOf(newState) !== -1) {
self.state = newState;
} else {
self.logger.error(
f(
'Pool with id [%s] failed attempted illegal state transition from [%s] to [%s] only following state allowed [%s]',
self.id,
self.state,
newState,
legalStates
)
);
}
}
//
// ReplSet instance id
var id = 1;
var handlers = ['connect', 'close', 'error', 'timeout', 'parseError'];
/**
* Creates a new Mongos instance
* @class
* @param {array} seedlist A list of seeds for the replicaset
* @param {number} [options.haInterval=5000] The High availability period for replicaset inquiry
* @param {Cursor} [options.cursorFactory=Cursor] The cursor factory class used for all query cursors
* @param {number} [options.size=5] Server connection pool size
* @param {boolean} [options.keepAlive=true] TCP Connection keep alive enabled
* @param {number} [options.keepAliveInitialDelay=0] Initial delay before TCP keep alive enabled
* @param {number} [options.localThresholdMS=15] Cutoff latency point in MS for MongoS proxy selection
* @param {boolean} [options.noDelay=true] TCP Connection no delay
* @param {number} [options.connectionTimeout=1000] TCP Connection timeout setting
* @param {number} [options.socketTimeout=0] TCP Socket timeout setting
* @param {boolean} [options.singleBufferSerializtion=true] Serialize into single buffer, trade of peak memory for serialization speed
* @param {boolean} [options.ssl=false] Use SSL for connection
* @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 {Buffer} [options.ca] SSL Certificate store binary buffer
* @param {Buffer} [options.crl] SSL Certificate revocation store binary buffer
* @param {Buffer} [options.cert] SSL Certificate binary buffer
* @param {Buffer} [options.key] SSL Key file binary buffer
* @param {string} [options.passphrase] SSL Certificate pass phrase
* @param {string} [options.servername=null] String containing the server name requested via TLS SNI.
* @param {boolean} [options.rejectUnauthorized=true] Reject unauthorized server certificates
* @param {boolean} [options.promoteLongs=true] Convert Long values from the db into Numbers if they fit into 53 bits
* @param {boolean} [options.promoteValues=true] Promotes BSON values to native types where possible, set to false to only receive wrapper types.
* @param {boolean} [options.promoteBuffers=false] Promotes Binary BSON values to native Node Buffers.
* @param {boolean} [options.domainsEnabled=false] Enable the wrapping of the callback in the current domain, disabled by default to avoid perf hit.
* @return {Mongos} A cursor instance
* @fires Mongos#connect
* @fires Mongos#reconnect
* @fires Mongos#joined
* @fires Mongos#left
* @fires Mongos#failed
* @fires Mongos#fullsetup
* @fires Mongos#all
* @fires Mongos#serverHeartbeatStarted
* @fires Mongos#serverHeartbeatSucceeded
* @fires Mongos#serverHeartbeatFailed
* @fires Mongos#topologyOpening
* @fires Mongos#topologyClosed
* @fires Mongos#topologyDescriptionChanged
* @property {string} type the topology type.
* @property {string} parserType the parser type used (c++ or js).
*/
var Mongos = function(seedlist, options) {
options = options || {};
// Get replSet Id
this.id = id++;
// Internal state
this.s = {
options: assign({}, options),
// BSON instance
bson:
options.bson ||
new BSON([
BSON.Binary,
BSON.Code,
BSON.DBRef,
BSON.Decimal128,
BSON.Double,
BSON.Int32,
BSON.Long,
BSON.Map,
BSON.MaxKey,
BSON.MinKey,
BSON.ObjectId,
BSON.BSONRegExp,
BSON.Symbol,
BSON.Timestamp
]),
// Factory overrides
Cursor: options.cursorFactory || BasicCursor,
// Logger instance
logger: Logger('Mongos', options),
// Seedlist
seedlist: seedlist,
// Ha interval
haInterval: options.haInterval ? options.haInterval : 10000,
// Disconnect handler
disconnectHandler: options.disconnectHandler,
// Server selection index
index: 0,
// Connect function options passed in
connectOptions: {},
// Are we running in debug mode
debug: typeof options.debug === 'boolean' ? options.debug : false,
// localThresholdMS
localThresholdMS: options.localThresholdMS || 15,
// Client info
clientInfo: createClientInfo(options),
// Authentication context
authenticationContexts: []
};
// Set the client info
this.s.options.clientInfo = createClientInfo(options);
// Log info warning if the socketTimeout < haInterval as it will cause
// a lot of recycled connections to happen.
if (
this.s.logger.isWarn() &&
this.s.options.socketTimeout !== 0 &&
this.s.options.socketTimeout < this.s.haInterval
) {
this.s.logger.warn(
f(
'warning socketTimeout %s is less than haInterval %s. This might cause unnecessary server reconnections due to socket timeouts',
this.s.options.socketTimeout,
this.s.haInterval
)
);
}
// All the authProviders
this.authProviders = options.authProviders || {
mongocr: new MongoCR(this.s.bson),
x509: new X509(this.s.bson),
plain: new Plain(this.s.bson),
gssapi: new GSSAPI(this.s.bson),
sspi: new SSPI(this.s.bson),
'scram-sha-1': new ScramSHA1(this.s.bson)
};
// Disconnected state
this.state = DISCONNECTED;
// Current proxies we are connecting to
this.connectingProxies = [];
// Currently connected proxies
this.connectedProxies = [];
// Disconnected proxies
this.disconnectedProxies = [];
// Are we authenticating
this.authenticating = false;
// Index of proxy to run operations against
this.index = 0;
// High availability timeout id
this.haTimeoutId = null;
// Last ismaster
this.ismaster = null;
// Description of the Replicaset
this.topologyDescription = {
topologyType: 'Unknown',
servers: []
};
// Add event listener
EventEmitter.call(this);
};
inherits(Mongos, EventEmitter);
Object.defineProperty(Mongos.prototype, 'type', {
enumerable: true,
get: function() {
return 'mongos';
}
});
Object.defineProperty(Mongos.prototype, 'parserType', {
enumerable: true,
get: function() {
return BSON.native ? 'c++' : 'js';
}
});
Object.defineProperty(Mongos.prototype, 'logicalSessionTimeoutMinutes', {
enumerable: true,
get: function() {
if (!this.ismaster) return null;
return this.ismaster.logicalSessionTimeoutMinutes || null;
}
});
/**
* Emit event if it exists
* @method
*/
function emitSDAMEvent(self, event, description) {
if (self.listeners(event).length > 0) {
self.emit(event, description);
}
}
/**
* Initiate server connect
* @method
* @param {array} [options.auth=null] Array of auth options to apply on connect
*/
Mongos.prototype.connect = function(options) {
var self = this;
// Add any connect level options to the internal state
this.s.connectOptions = options || {};
// Set connecting state
stateTransition(this, CONNECTING);
// Create server instances
var servers = this.s.seedlist.map(function(x) {
return new Server(
assign(
{},
self.s.options,
x,
{
authProviders: self.authProviders,
reconnect: false,
monitoring: false,
inTopology: true
},
{
clientInfo: clone(self.s.clientInfo)
}
)
);
});
servers.forEach(function(server) {
server.on('serverDescriptionChanged', function(event) {
self.emit('serverDescriptionChanged', event);
});
});
// Emit the topology opening event
emitSDAMEvent(this, 'topologyOpening', { topologyId: this.id });
// Start all server connections
connectProxies(self, servers);
};
function handleEvent(self) {
return function() {
if (self.state === DESTROYED) return;
// Move to list of disconnectedProxies
moveServerFrom(self.connectedProxies, self.disconnectedProxies, this);
// Emit the initial topology
emitTopologyDescriptionChanged(self);
// Emit the left signal
self.emit('left', 'mongos', this);
// Emit the sdam event
self.emit('serverClosed', {
topologyId: self.id,
address: this.name
});
};
}
function handleInitialConnectEvent(self, event) {
return function() {
var _this = this;
// Destroy the instance
if (self.state === DESTROYED) {
// Emit the initial topology
emitTopologyDescriptionChanged(self);
// Move from connectingProxies
moveServerFrom(self.connectingProxies, self.disconnectedProxies, this);
return this.destroy();
}
// Check the type of server
if (event === 'connect') {
// Do we have authentication contexts that need to be applied
applyAuthenticationContexts(self, _this, function() {
// Get last known ismaster
self.ismaster = _this.lastIsMaster();
// Is this not a proxy, remove t
if (self.ismaster.msg === 'isdbgrid') {
// Add to the connectd list
for (var i = 0; i < self.connectedProxies.length; i++) {
if (self.connectedProxies[i].name === _this.name) {
// Move from connectingProxies
moveServerFrom(self.connectingProxies, self.disconnectedProxies, _this);
// Emit the initial topology
emitTopologyDescriptionChanged(self);
_this.destroy();
return self.emit('failed', _this);
}
}
// Remove the handlers
for (i = 0; i < handlers.length; i++) {
_this.removeAllListeners(handlers[i]);
}
// Add stable state handlers
_this.on('error', handleEvent(self, 'error'));
_this.on('close', handleEvent(self, 'close'));
_this.on('timeout', handleEvent(self, 'timeout'));
_this.on('parseError', handleEvent(self, 'parseError'));
// Move from connecting proxies connected
moveServerFrom(self.connectingProxies, self.connectedProxies, _this);
// Emit the joined event
self.emit('joined', 'mongos', _this);
} else {
// Print warning if we did not find a mongos proxy
if (self.s.logger.isWarn()) {
var message = 'expected mongos proxy, but found replicaset member mongod for server %s';
// We have a standalone server
if (!self.ismaster.hosts) {
message = 'expected mongos proxy, but found standalone mongod for server %s';
}
self.s.logger.warn(f(message, _this.name));
}
// This is not a mongos proxy, remove it completely
removeProxyFrom(self.connectingProxies, _this);
// Emit the left event
self.emit('left', 'server', _this);
// Emit failed event
self.emit('failed', _this);
}
});
} else {
moveServerFrom(self.connectingProxies, self.disconnectedProxies, this);
// Emit the left event
self.emit('left', 'mongos', this);
// Emit failed event
self.emit('failed', this);
}
// Emit the initial topology
emitTopologyDescriptionChanged(self);
// Trigger topologyMonitor
if (self.connectingProxies.length === 0) {
// Emit connected if we are connected
if (self.connectedProxies.length > 0 && self.state === CONNECTING) {
// Set the state to connected
stateTransition(self, CONNECTED);
// Emit the connect event
self.emit('connect', self);
self.emit('fullsetup', self);
self.emit('all', self);
} else if (self.disconnectedProxies.length === 0) {
// Print warning if we did not find a mongos proxy
if (self.s.logger.isWarn()) {
self.s.logger.warn(
f('no mongos proxies found in seed list, did you mean to connect to a replicaset')
);
}
// Emit the error that no proxies were found
return self.emit('error', new MongoError('no mongos proxies found in seed list'));
}
// Topology monitor
topologyMonitor(self, { firstConnect: true });
}
};
}
function connectProxies(self, servers) {
// Update connectingProxies
self.connectingProxies = self.connectingProxies.concat(servers);
// Index used to interleaf the server connects, avoiding
// runtime issues on io constrained vm's
var timeoutInterval = 0;
function connect(server, timeoutInterval) {
setTimeout(function() {
// Emit opening server event
self.emit('serverOpening', {
topologyId: self.id,
address: server.name
});
// Emit the initial topology
emitTopologyDescriptionChanged(self);
// Add event handlers
server.once('close', handleInitialConnectEvent(self, 'close'));
server.once('timeout', handleInitialConnectEvent(self, 'timeout'));
server.once('parseError', handleInitialConnectEvent(self, 'parseError'));
server.once('error', handleInitialConnectEvent(self, 'error'));
server.once('connect', handleInitialConnectEvent(self, 'connect'));
// Start connection
server.connect(self.s.connectOptions);
}, timeoutInterval);
}
// Start all the servers
while (servers.length > 0) {
connect(servers.shift(), timeoutInterval++);
}
}
function pickProxy(self) {
// Get the currently connected Proxies
var connectedProxies = self.connectedProxies.slice(0);
// Set lower bound
var lowerBoundLatency = Number.MAX_VALUE;
// Determine the lower bound for the Proxies
for (var i = 0; i < connectedProxies.length; i++) {
if (connectedProxies[i].lastIsMasterMS < lowerBoundLatency) {
lowerBoundLatency = connectedProxies[i].lastIsMasterMS;
}
}
// Filter out the possible servers
connectedProxies = connectedProxies.filter(function(server) {
if (
server.lastIsMasterMS <= lowerBoundLatency + self.s.localThresholdMS &&
server.isConnected()
) {
return true;
}
});
// We have no connectedProxies pick first of the connected ones
if (connectedProxies.length === 0) {
return self.connectedProxies[0];
}
// Get proxy
var proxy = connectedProxies[self.index % connectedProxies.length];
// Update the index
self.index = (self.index + 1) % connectedProxies.length;
// Return the proxy
return proxy;
}
function moveServerFrom(from, to, proxy) {
for (var i = 0; i < from.length; i++) {
if (from[i].name === proxy.name) {
from.splice(i, 1);
}
}
for (i = 0; i < to.length; i++) {
if (to[i].name === proxy.name) {
to.splice(i, 1);
}
}
to.push(proxy);
}
function removeProxyFrom(from, proxy) {
for (var i = 0; i < from.length; i++) {
if (from[i].name === proxy.name) {
from.splice(i, 1);
}
}
}
function reconnectProxies(self, proxies, callback) {
// Count lefts
var count = proxies.length;
// Handle events
var _handleEvent = function(self, event) {
return function() {
var _self = this;
count = count - 1;
// Destroyed
if (self.state === DESTROYED || self.state === UNREFERENCED) {
moveServerFrom(self.connectingProxies, self.disconnectedProxies, _self);
// Return destroy
return this.destroy();
}
if (event === 'connect' && !self.authenticating) {
// Do we have authentication contexts that need to be applied
applyAuthenticationContexts(self, _self, function() {
// Destroyed
if (self.state === DESTROYED || self.state === UNREFERENCED) {
moveServerFrom(self.connectingProxies, self.disconnectedProxies, _self);
return _self.destroy();
}
// Remove the handlers
for (var i = 0; i < handlers.length; i++) {
_self.removeAllListeners(handlers[i]);
}
// Add stable state handlers
_self.on('error', handleEvent(self, 'error'));
_self.on('close', handleEvent(self, 'close'));
_self.on('timeout', handleEvent(self, 'timeout'));
_self.on('parseError', handleEvent(self, 'parseError'));
// Move to the connected servers
moveServerFrom(self.disconnectedProxies, self.connectedProxies, _self);
// Emit topology Change
emitTopologyDescriptionChanged(self);
// Emit joined event
self.emit('joined', 'mongos', _self);
});
} else if (event === 'connect' && self.authenticating) {
// Move from connectingProxies
moveServerFrom(self.connectingProxies, self.disconnectedProxies, _self);
this.destroy();
}
// Are we done finish up callback
if (count === 0) {
callback();
}
};
};
// No new servers
if (count === 0) {
return callback();
}
// Execute method
function execute(_server, i) {
setTimeout(function() {
// Destroyed
if (self.state === DESTROYED || self.state === UNREFERENCED) {
return;
}
// Create a new server instance
var server = new Server(
assign(
{},
self.s.options,
{
host: _server.name.split(':')[0],
port: parseInt(_server.name.split(':')[1], 10)
},
{
authProviders: self.authProviders,
reconnect: false,
monitoring: false,
inTopology: true
},
{
clientInfo: clone(self.s.clientInfo)
}
)
);
// Relay the server description change
server.on('serverDescriptionChanged', function(event) {
self.emit('serverDescriptionChanged', event);
});
// Emit opening server event
self.emit('serverOpening', {
topologyId: server.s.topologyId !== -1 ? server.s.topologyId : self.id,
address: server.name
});
// Add temp handlers
server.once('connect', _handleEvent(self, 'connect'));
server.once('close', _handleEvent(self, 'close'));
server.once('timeout', _handleEvent(self, 'timeout'));
server.once('error', _handleEvent(self, 'error'));
server.once('parseError', _handleEvent(self, 'parseError'));
// Connect to proxy
server.connect(self.s.connectOptions);
}, i);
}
// Create new instances
for (var i = 0; i < proxies.length; i++) {
execute(proxies[i], i);
}
}
function applyAuthenticationContexts(self, server, callback) {
if (self.s.authenticationContexts.length === 0) {
return callback();
}
// Copy contexts to ensure no modificiation in the middle of
// auth process.
var authContexts = self.s.authenticationContexts.slice(0);
// Apply one of the contexts
function applyAuth(authContexts, server, callback) {
if (authContexts.length === 0) return callback();
// Get the first auth context
var authContext = authContexts.shift();
// Copy the params
var customAuthContext = authContext.slice(0);
// Push our callback handler
customAuthContext.push(function(/* err */) {
applyAuth(authContexts, server, callback);
});
// Attempt authentication
server.auth.apply(server, customAuthContext);
}
// Apply all auth contexts
applyAuth(authContexts, server, callback);
}
function topologyMonitor(self, options) {
options = options || {};
// Set momitoring timeout
self.haTimeoutId = setTimeout(function() {
if (self.state === DESTROYED || self.state === UNREFERENCED) return;
// If we have a primary and a disconnect handler, execute
// buffered operations
if (self.isConnected() && self.s.disconnectHandler) {
self.s.disconnectHandler.execute();
}
// Get the connectingServers
var proxies = self.connectedProxies.slice(0);
// Get the count
var count = proxies.length;
// If the count is zero schedule a new fast
function pingServer(_self, _server, cb) {
// Measure running time
var start = new Date().getTime();
// Emit the server heartbeat start
emitSDAMEvent(self, 'serverHeartbeatStarted', { connectionId: _server.name });
// Execute ismaster
_server.command(
'admin.$cmd',
{
ismaster: true
},
{
monitoring: true,
socketTimeout: self.s.options.connectionTimeout || 2000
},
function(err, r) {
if (self.state === DESTROYED || self.state === UNREFERENCED) {
// Move from connectingProxies
moveServerFrom(self.connectedProxies, self.disconnectedProxies, _server);
_server.destroy();
return cb(err, r);
}
// Calculate latency
var latencyMS = new Date().getTime() - start;
// We had an error, remove it from the state
if (err) {
// Emit the server heartbeat failure
emitSDAMEvent(self, 'serverHeartbeatFailed', {
durationMS: latencyMS,
failure: err,
connectionId: _server.name
});
// Move from connected proxies to disconnected proxies
moveServerFrom(self.connectedProxies, self.disconnectedProxies, _server);
} else {
// Update the server ismaster
_server.ismaster = r.result;
_server.lastIsMasterMS = latencyMS;
// Server heart beat event
emitSDAMEvent(self, 'serverHeartbeatSucceeded', {
durationMS: latencyMS,
reply: r.result,
connectionId: _server.name
});
}
cb(err, r);
}
);
}
// No proxies initiate monitor again
if (proxies.length === 0) {
// Emit close event if any listeners registered
if (self.listeners('close').length > 0 && self.state === CONNECTING) {
self.emit('error', new MongoError('no mongos proxy available'));
} else {
self.emit('close', self);
}
// Attempt to connect to any unknown servers
return reconnectProxies(self, self.disconnectedProxies, function() {
if (self.state === DESTROYED || self.state === UNREFERENCED) return;
// Are we connected ? emit connect event
if (self.state === CONNECTING && options.firstConnect) {
self.emit('connect', self);
self.emit('fullsetup', self);
self.emit('all', self);
} else if (self.isConnected()) {
self.emit('reconnect', self);
} else if (!self.isConnected() && self.listeners('close').length > 0) {
self.emit('close', self);
}
// Perform topology monitor
topologyMonitor(self);
});
}
// Ping all servers
for (var i = 0; i < proxies.length; i++) {
pingServer(self, proxies[i], function() {
count = count - 1;
if (count === 0) {
if (self.state === DESTROYED || self.state === UNREFERENCED) return;
// Attempt to connect to any unknown servers
reconnectProxies(self, self.disconnectedProxies, function() {
if (self.state === DESTROYED || self.state === UNREFERENCED) return;
// Perform topology monitor
topologyMonitor(self);
});
}
});
}
}, self.s.haInterval);
}
/**
* Returns the last known ismaster document for this server
* @method
* @return {object}
*/
Mongos.prototype.lastIsMaster = function() {
return this.ismaster;
};
/**
* Unref all connections belong to this server
* @method
*/
Mongos.prototype.unref = function() {
// Transition state
stateTransition(this, UNREFERENCED);
// Get all proxies
var proxies = this.connectedProxies.concat(this.connectingProxies);
proxies.forEach(function(x) {
x.unref();
});
clearTimeout(this.haTimeoutId);
};
/**
* Destroy the server connection
* @param {boolean} [options.force=false] Force destroy the pool
* @method
*/
Mongos.prototype.destroy = function(options) {
var self = this;
// Transition state
stateTransition(this, DESTROYED);
// Get all proxies
var proxies = this.connectedProxies.concat(this.connectingProxies);
// Clear out any monitoring process
if (this.haTimeoutId) clearTimeout(this.haTimeoutId);
// Clear out authentication contexts
this.s.authenticationContexts = [];
// Destroy all connecting servers
proxies.forEach(function(x) {
// Emit the sdam event
self.emit('serverClosed', {
topologyId: self.id,
address: x.name
});
// Destroy the server
x.destroy(options);
// Move to list of disconnectedProxies
moveServerFrom(self.connectedProxies, self.disconnectedProxies, x);
});
// Emit the final topology change
emitTopologyDescriptionChanged(self);
// Emit toplogy closing event
emitSDAMEvent(this, 'topologyClosed', { topologyId: this.id });
};
/**
* Figure out if the server is connected
* @method
* @return {boolean}
*/
Mongos.prototype.isConnected = function() {
return this.connectedProxies.length > 0;
};
/**
* Figure out if the server instance was destroyed by calling destroy
* @method
* @return {boolean}
*/
Mongos.prototype.isDestroyed = function() {
return this.state === DESTROYED;
};
//
// Operations
//
// Execute write operation
var executeWriteOperation = function(self, op, ns, ops, options, callback) {
if (typeof options === 'function') {
(callback = options), (options = {}), (options = options || {});
}
// Ensure we have no options
options = options || {};
// Pick a server
var server = pickProxy(self);
// No server found error out
if (!server) return callback(new MongoError('no mongos proxy available'));
// Execute the command
server[op](ns, ops, options, callback);
};
/**
* Insert one or more documents
* @method
* @param {string} ns The MongoDB fully qualified namespace (ex: db1.collection1)
* @param {array} ops An array of documents to insert
* @param {boolean} [options.ordered=true] Execute in order or out of order
* @param {object} [options.writeConcern={}] Write concern for the operation
* @param {Boolean} [options.serializeFunctions=false] Specify if functions on an object should be serialized.
* @param {Boolean} [options.ignoreUndefined=false] Specify if the BSON serializer should ignore undefined fields.
* @param {opResultCallback} callback A callback function
*/
Mongos.prototype.insert = function(ns, ops, options, callback) {
if (typeof options === 'function') {
(callback = options), (options = {}), (options = options || {});
}
if (this.state === DESTROYED) return callback(new MongoError(f('topology was destroyed')));
// Not connected but we have a disconnecthandler
if (!this.isConnected() && this.s.disconnectHandler != null) {
return this.s.disconnectHandler.add('insert', ns, ops, options, callback);
}
// No mongos proxy available
if (!this.isConnected()) {
return callback(new MongoError('no mongos proxy available'));
}
// Execute write operation
executeWriteOperation(this, 'insert', ns, ops, options, callback);
};
/**
* Perform one or more update operations
* @method
* @param {string} ns The MongoDB fully qualified namespace (ex: db1.collection1)
* @param {array} ops An array of updates
* @param {boolean} [options.ordered=true] Execute in order or out of order
* @param {object} [options.writeConcern={}] Write concern for the operation
* @param {Boolean} [options.serializeFunctions=false] Specify if functions on an object should be serialized.
* @param {Boolean} [options.ignoreUndefined=false] Specify if the BSON serializer should ignore undefined fields.
* @param {opResultCallback} callback A callback function
*/
Mongos.prototype.update = function(ns, ops, options, callback) {
if (typeof options === 'function') {
(callback = options), (options = {}), (options = options || {});
}
if (this.state === DESTROYED) return callback(new MongoError(f('topology was destroyed')));
// Not connected but we have a disconnecthandler
if (!this.isConnected() && this.s.disconnectHandler != null) {
return this.s.disconnectHandler.add('update', ns, ops, options, callback);
}
// No mongos proxy available
if (!this.isConnected()) {
return callback(new MongoError('no mongos proxy available'));
}
// Execute write operation
executeWriteOperation(this, 'update', ns, ops, options, callback);
};
/**
* Perform one or more remove operations
* @method
* @param {string} ns The MongoDB fully qualified namespace (ex: db1.collection1)
* @param {array} ops An array of removes
* @param {boolean} [options.ordered=true] Execute in order or out of order
* @param {object} [options.writeConcern={}] Write concern for the operation
* @param {Boolean} [options.serializeFunctions=false] Specify if functions on an object should be serialized.
* @param {Boolean} [options.ignoreUndefined=false] Specify if the BSON serializer should ignore undefined fields.
* @param {opResultCallback} callback A callback function
*/
Mongos.prototype.remove = function(ns, ops, options, callback) {
if (typeof options === 'function') {
(callback = options), (options = {}), (options = options || {});
}
if (this.state === DESTROYED) return callback(new MongoError(f('topology was destroyed')));
// Not connected but we have a disconnecthandler
if (!this.isConnected() && this.s.disconnectHandler != null) {
return this.s.disconnectHandler.add('remove', ns, ops, options, callback);
}
// No mongos proxy available
if (!this.isConnected()) {
return callback(new MongoError('no mongos proxy available'));
}
// Execute write operation
executeWriteOperation(this, 'remove', ns, ops, options, callback);