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不要怂，就是干，撸起袖子干！

Commit e8cbc7de by Dmitry Chornyi
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Refactored pool.destroy

1 parent 63ac4704
Inline Side-by-side
Showing with 440 additions and 443 deletions
lib/dialects/mysql/connector-manager.js
var mysql
, Pooling = require('generic-pool')
, Query = require("./query")
, Utils = require("../../utils")
, without = function(arr, elem) { return arr.filter(function(e) { return e != elem }) }
, Pooling = require('generic-pool')
, Query = require("./query")
, Utils = require("../../utils")
, without = function(arr, elem) { return arr.filter(function(e) { return e != elem }) }
module.exports = (function() {
var ConnectorManager = function(sequelize, config) {
try {
if (config.dialectModulePath) {
mysql = require(config.dialectModulePath)
} else {
mysql = require('mysql')
}
} catch (err) {
console.log('You need to install mysql package manually')
}
this.sequelize = sequelize
this.client = null
this.config = config || {}
this.config.port = this.config.port || 3306
this.disconnectTimeoutId = null
this.queue = []
this.activeQueue = []
this.maxConcurrentQueries = (this.config.maxConcurrentQueries || 50)
this.poolCfg = Utils._.defaults(this.config.pool, {
maxConnections: 10,
minConnections: 0,
maxIdleTime: 1000,
handleDisconnects: false,
validate: validateConnection
});
this.pendingQueries = 0;
this.useReplicaton = !!config.replication;
this.useQueue = config.queue !== undefined ? config.queue : true;
var self = this
if (this.useReplicaton) {
var reads = 0
, writes = 0;
// Init configs with options from config if not present
for (var i in config.replication.read) {
config.replication.read[i] = Utils._.defaults(config.replication.read[i], {
host: this.config.host,
port: this.config.port,
username: this.config.username,
password: this.config.password,
database: this.config.database
});
}
config.replication.write = Utils._.defaults(config.replication.write, {
host: this.config.host,
port: this.config.port,
username: this.config.username,
password: this.config.password,
database: this.config.database
});
// I'll make my own pool, with blackjack and hookers!
this.pool = {
release: function (client) {
if (client.queryType == 'read') {
return this.read.release(client);
} else {
return this.write.release(client);
}
},
acquire: function (callback, priority, queryType) {
if (queryType == 'SELECT') {
this.read.acquire(callback, priority);
} else {
this.write.acquire(callback, priority);
}
},
drain: function () {
this.read.drain();
this.write.drain();
},
read: Pooling.Pool({
name: 'sequelize-read',
create: function (done) {
if (reads >= self.config.replication.read.length) {
reads = 0
}
var config = self.config.replication.read[reads++];
connect.call(self, function (err, connection) {
if (connection) {
connection.queryType = 'read'
}
done(err, connection)
}, config);
},
destroy: function(client) {
disconnect.call(self, client)
},
validate: self.poolCfg.validate,
max: self.poolCfg.maxConnections,
min: self.poolCfg.minConnections,
idleTimeoutMillis: self.poolCfg.maxIdleTime
}),
write: Pooling.Pool({
name: 'sequelize-write',
create: function (done) {
connect.call(self, function (err, connection) {
if (connection) {
connection.queryType = 'write'
}
done(err, connection)
}, self.config.replication.write);
},
destroy: function(client) {
disconnect.call(self, client)
},
validate: self.poolCfg.validate,
max: self.poolCfg.maxConnections,
min: self.poolCfg.minConnections,
idleTimeoutMillis: self.poolCfg.maxIdleTime
})
};
} else if (this.poolCfg) {
//the user has requested pooling, so create our connection pool
this.pool = Pooling.Pool({
name: 'sequelize-mysql',
create: function (done) {
connect.call(self, function (err, connection) {
// This has to be nested for some reason, else the error won't propagate correctly
done(err, connection);
})
},
destroy: function(client) {
disconnect.call(self, client)
},
max: self.poolCfg.maxConnections,
min: self.poolCfg.minConnections,
validate: self.poolCfg.validate,
idleTimeoutMillis: self.poolCfg.maxIdleTime
})
}
this.onProcessExit = function () {
//be nice & close our connections on exit
if (self.pool) {
self.pool.drain()
} else if (self.client) {
disconnect(self.client)
}
return
}.bind(this);
process.on('exit', this.onProcessExit)
}
Utils._.extend(ConnectorManager.prototype, require("../connector-manager").prototype);
ConnectorManager.prototype.query = function(sql, callee, options) {
if (this.useQueue) {
// If queueing we'll let the execQueueItem method handle connecting
var queueItem = {
query: new Query(null, this.sequelize, callee, options || {}),
sql: sql
};
queueItem.query.options.uuid = this.config.uuid
enqueue.call(this, queueItem, options);
return queueItem.query;
}
var self = this, query = new Query(null, this.sequelize, callee, options || {});
this.pendingQueries++;
query.options.uuid = this.config.uuid
query.done(function() {
self.pendingQueries--;
if (self.pool) {
self.pool.release(query.client);
} else {
if (self.pendingQueries === 0) {
setTimeout(function() {
if (self.pendingQueries === 0){
self.disconnect.call(self);
}
}, 100);
}
}
});
this.getConnection(options, function (err, client) {
if (err) {
return query.emit('error', err)
}
query.client = client
query.run(sql)
});
return query;
};
ConnectorManager.prototype.getConnection = function(options, callback) {
var self = this;
if (typeof options === "function") {
callback = options;
options = {};
}
return new Utils.CustomEventEmitter(function (emitter) {
if (!self.pool) {
// Regular client caching
if (self.client) {
return emitter.emit('success', self.client);
} else {
// Cache for concurrent queries
if (self._getConnection) {
self._getConnection.proxy(emitter);
return;
}
// Set cache and acquire connection
self._getConnection = emitter;
connect.call(self, function(err, client) {
if (err) {
return emitter.emit('error', err);
}
// Unset caching, should now be caught by the self.client check
self._getConnection = null;
self.client = client;
emitter.emit('success', client);
});
}
}
if (self.pool) {
// Acquire from pool
self.pool.acquire(function(err, client) {
if (err) {
return emitter.emit('error', err);
}
emitter.emit('success', client);
}, options.priority, options.type);
}
}).run().done(callback);
};
ConnectorManager.prototype.disconnect = function() {
if (this.client) {
disconnect.call(this, this.client)
}
return
};
// private
var disconnect = function(client) {
var self = this;
this.client = null;
client.end(function() {
if (!self.useQueue) {
return client.destroy();
}
var intervalObj = null
var cleanup = function () {
var retryCt = 0
// make sure to let client finish before calling destroy
if (client._queue && (client._queue.length > 0)) {
return
}
// needed to prevent mysql connection leak
client.destroy()
clearInterval(intervalObj)
}
intervalObj = setInterval(cleanup, 10)
cleanup()
return
})
}
var connect = function(done, config) {
config = config || this.config
var emitter = new (require('events').EventEmitter)()
var connectionConfig = {
host: config.host,
port: config.port,
user: config.username,
password: config.password,
database: config.database,
timezone: 'Z'
};
if (config.dialectOptions) {
Object.keys(config.dialectOptions).forEach(function (key) {
connectionConfig[key] = config.dialectOptions[key];
});
}
var connection = mysql.createConnection(connectionConfig);
connection.connect(function(err) {
if (err) {
switch(err.code) {
case 'ECONNREFUSED':
case 'ER_ACCESS_D2ENIED_ERROR':
emitter.emit('error', 'Failed to authenticate for MySQL. Please double check your settings.')
break
case 'ENOTFOUND':
case 'EHOSTUNREACH':
case 'EINVAL':
emitter.emit('error', 'Failed to find MySQL server. Please double check your settings.')
break
default:
emitter.emit('error', err);
break;
}
return;
}
emitter.emit('success', connection);
})
connection.query("SET time_zone = '+0:00'");
// client.setMaxListeners(self.maxConcurrentQueries)
this.isConnecting = false
if (config.pool !== null && config.pool.handleDisconnects) {
handleDisconnect(this.pool, connection)
}
emitter.on('error', function (err) {
done(err);
});
emitter.on('success', function (connection) {
done(null, connection);
});
}
var handleDisconnect = function(pool, client) {
client.on('error', function(err) {
if (err.code !== 'PROTOCOL_CONNECTION_LOST') {
throw err
}
if (typeof(pool.destroy) == 'function') {
pool.destroy(client)
} else {
if (client.queryType == 'read' && pool.read && typeof(pool.read.destroy) == 'function') {
pool.read.destroy(client)
}
if (client.queryType == 'write' && pool.write && typeof(pool.write.destroy) == 'function') {
pool.write.destroy(client)
}
}
})
}
var validateConnection = function(client) {
return client && client.state !== 'disconnected'
}
var enqueue = function(queueItem, options) {
options = options || {}
if (this.activeQueue.length < this.maxConcurrentQueries) {
this.activeQueue.push(queueItem)
execQueueItem.call(this, queueItem)
} else {
this.queue.push(queueItem)
}
}
var dequeue = function(queueItem) {
//return the item's connection to the pool
if (this.pool) {
this.pool.release(queueItem.client)
}
this.activeQueue = without(this.activeQueue, queueItem)
}
var transferQueuedItems = function(count) {
for(var i = 0; i < count; i++) {
var queueItem = this.queue.shift();
if (queueItem) {
enqueue.call(this, queueItem)
}
}
}
var afterQuery = function(queueItem) {
dequeue.call(this, queueItem)
transferQueuedItems.call(this, this.maxConcurrentQueries - this.activeQueue.length)
disconnectIfNoConnections.call(this)
}
var execQueueItem = function(queueItem) {
var self = this
self.getConnection({
priority: queueItem.query.options.priority,
type: queueItem.query.options.type
}, function (err, connection) {
if (err) {
queueItem.query.emit('error', err)
return
}
queueItem.query.client = connection
queueItem.client = connection
queueItem.query
.success(function(){ afterQuery.call(self, queueItem) })
.error(function(){ afterQuery.call(self, queueItem) })
queueItem.query.run(queueItem.sql, queueItem.client)
})
}
ConnectorManager.prototype.__defineGetter__('hasQueuedItems', function() {
return (this.queue.length > 0) || (this.activeQueue.length > 0) || (this.client && this.client._queue && (this.client._queue.length > 0))
})
// legacy
ConnectorManager.prototype.__defineGetter__('hasNoConnections', function() {
return !this.hasQueuedItems
})
ConnectorManager.prototype.__defineGetter__('isConnected', function() {
return this.client != null
})
var disconnectIfNoConnections = function() {
var self = this
this.disconnectTimeoutId && clearTimeout(this.disconnectTimeoutId)
this.disconnectTimeoutId = setTimeout(function() {
self.isConnected && !self.hasQueuedItems && self.disconnect()
}, 100)
}
return ConnectorManager
var ConnectorManager = function(sequelize, config) {
try {
if (config.dialectModulePath) {
mysql = require(config.dialectModulePath)
} else {
mysql = require('mysql')
}
} catch (err) {
console.log('You need to install mysql package manually')
}
this.sequelize = sequelize
this.client = null
this.config = config || {}
this.config.port = this.config.port || 3306
this.disconnectTimeoutId = null
this.queue = []
this.activeQueue = []
this.maxConcurrentQueries = (this.config.maxConcurrentQueries || 50)
this.poolCfg = Utils._.defaults(this.config.pool, {
maxConnections: 10,
minConnections: 0,
maxIdleTime: 1000,
handleDisconnects: false,
validate: validateConnection
});
this.pendingQueries = 0;
this.useReplicaton = !!config.replication;
this.useQueue = config.queue !== undefined ? config.queue : true;
var self = this
if (this.useReplicaton) {
var reads = 0
, writes = 0;
// Init configs with options from config if not present
for (var i in config.replication.read) {
config.replication.read[i] = Utils._.defaults(config.replication.read[i], {
host: this.config.host,
port: this.config.port,
username: this.config.username,
password: this.config.password,
database: this.config.database
});
}
config.replication.write = Utils._.defaults(config.replication.write, {
host: this.config.host,
port: this.config.port,
username: this.config.username,
password: this.config.password,
database: this.config.database
});
// I'll make my own pool, with blackjack and hookers!
this.pool = {
release: function (client) {
if (client.queryType == 'read') {
return this.read.release(client);
} else {
return this.write.release(client);
}
},
destroy: function (client) {
if (client.queryType == 'read') {
return this.read.destroy(client);
} else {
return this.write.destroy(client);
}
},
acquire: function (callback, priority, queryType) {
if (queryType == 'SELECT') {
this.read.acquire(callback, priority);
} else {
this.write.acquire(callback, priority);
}
},
drain: function () {
this.read.drain();
this.write.drain();
},
read: Pooling.Pool({
name: 'sequelize-read',
create: function (done) {
if (reads >= self.config.replication.read.length) {
reads = 0
}
var config = self.config.replication.read[reads++];
connect.call(self, function (err, connection) {
if (connection) {
connection.queryType = 'read'
}
done(err, connection)
}, config);
},
destroy: function(client) {
disconnect.call(self, client)
},
validate: self.poolCfg.validate,
max: self.poolCfg.maxConnections,
min: self.poolCfg.minConnections,
idleTimeoutMillis: self.poolCfg.maxIdleTime
}),
write: Pooling.Pool({
name: 'sequelize-write',
create: function (done) {
connect.call(self, function (err, connection) {
if (connection) {
connection.queryType = 'write'
}
done(err, connection)
}, self.config.replication.write);
},
destroy: function(client) {
disconnect.call(self, client)
},
validate: self.poolCfg.validate,
max: self.poolCfg.maxConnections,
min: self.poolCfg.minConnections,
idleTimeoutMillis: self.poolCfg.maxIdleTime
})
};
} else if (this.poolCfg) {
//the user has requested pooling, so create our connection pool
this.pool = Pooling.Pool({
name: 'sequelize-mysql',
create: function (done) {
connect.call(self, function (err, connection) {
// This has to be nested for some reason, else the error won't propagate correctly
done(err, connection);
})
},
destroy: function(client) {
disconnect.call(self, client)
},
max: self.poolCfg.maxConnections,
min: self.poolCfg.minConnections,
validate: self.poolCfg.validate,
idleTimeoutMillis: self.poolCfg.maxIdleTime
})
}
this.onProcessExit = function () {
//be nice & close our connections on exit
if (self.pool) {
self.pool.drain()
} else if (self.client) {
disconnect(self.client)
}
return
}.bind(this);
process.on('exit', this.onProcessExit)
}
Utils._.extend(ConnectorManager.prototype, require("../connector-manager").prototype);
ConnectorManager.prototype.query = function(sql, callee, options) {
if (this.useQueue) {
// If queueing we'll let the execQueueItem method handle connecting
var queueItem = {
query: new Query(null, this.sequelize, callee, options || {}),
sql: sql
};
queueItem.query.options.uuid = this.config.uuid
enqueue.call(this, queueItem, options);
return queueItem.query;
}
var self = this, query = new Query(null, this.sequelize, callee, options || {});
this.pendingQueries++;
query.options.uuid = this.config.uuid
query.done(function() {
self.pendingQueries--;
if (self.pool) {
self.pool.release(query.client);
} else {
if (self.pendingQueries === 0) {
setTimeout(function() {
if (self.pendingQueries === 0){
self.disconnect.call(self);
}
}, 100);
}
}
});
this.getConnection(options, function (err, client) {
if (err) {
return query.emit('error', err)
}
query.client = client
query.run(sql)
});
return query;
};
ConnectorManager.prototype.getConnection = function(options, callback) {
var self = this;
if (typeof options === "function") {
callback = options;
options = {};
}
return new Utils.CustomEventEmitter(function (emitter) {
if (!self.pool) {
// Regular client caching
if (self.client) {
return emitter.emit('success', self.client);
} else {
// Cache for concurrent queries
if (self._getConnection) {
self._getConnection.proxy(emitter);
return;
}
// Set cache and acquire connection
self._getConnection = emitter;
connect.call(self, function(err, client) {
if (err) {
return emitter.emit('error', err);
}
// Unset caching, should now be caught by the self.client check
self._getConnection = null;
self.client = client;
emitter.emit('success', client);
});
}
}
if (self.pool) {
// Acquire from pool
self.pool.acquire(function(err, client) {
if (err) {
return emitter.emit('error', err);
}
emitter.emit('success', client);
}, options.priority, options.type);
}
}).run().done(callback);
};
ConnectorManager.prototype.disconnect = function() {
if (this.client) {
disconnect.call(this, this.client)
}
return
};
// private
var disconnect = function(client) {
var self = this;
this.client = null;
client.end(function() {
if (!self.useQueue) {
return client.destroy();
}
var intervalObj = null
var cleanup = function () {
var retryCt = 0
// make sure to let client finish before calling destroy
if (client._queue && (client._queue.length > 0)) {
return
}
// needed to prevent mysql connection leak
client.destroy()
clearInterval(intervalObj)
}
intervalObj = setInterval(cleanup, 10)
cleanup()
return
})
}
var connect = function(done, config) {
config = config || this.config
var emitter = new (require('events').EventEmitter)()
var connectionConfig = {
host: config.host,
port: config.port,
user: config.username,
password: config.password,
database: config.database,
timezone: 'Z'
};
if (config.dialectOptions) {
Object.keys(config.dialectOptions).forEach(function (key) {
connectionConfig[key] = config.dialectOptions[key];
});
}
var connection = mysql.createConnection(connectionConfig);
connection.connect(function(err) {
if (err) {
switch(err.code) {
case 'ECONNREFUSED':
case 'ER_ACCESS_D2ENIED_ERROR':
emitter.emit('error', 'Failed to authenticate for MySQL. Please double check your settings.')
break
case 'ENOTFOUND':
case 'EHOSTUNREACH':
case 'EINVAL':
emitter.emit('error', 'Failed to find MySQL server. Please double check your settings.')
break
default:
emitter.emit('error', err);
break;
}
return;
}
emitter.emit('success', connection);
})
connection.query("SET time_zone = '+0:00'");
// client.setMaxListeners(self.maxConcurrentQueries)
this.isConnecting = false
if (config.pool !== null && config.pool.handleDisconnects) {
handleDisconnect(this.pool, connection)
}
emitter.on('error', function (err) {
done(err);
});
emitter.on('success', function (connection) {
done(null, connection);
});
}
var handleDisconnect = function(pool, client) {
client.on('error', function(err) {
if (err.code !== 'PROTOCOL_CONNECTION_LOST') {
throw err
}
pool.destroy(client)
})
}
var validateConnection = function(client) {
return client && client.state !== 'disconnected'
}
var enqueue = function(queueItem, options) {
options = options || {}
if (this.activeQueue.length < this.maxConcurrentQueries) {
this.activeQueue.push(queueItem)
execQueueItem.call(this, queueItem)
} else {
this.queue.push(queueItem)
}
}
var dequeue = function(queueItem) {
//return the item's connection to the pool
if (this.pool) {
this.pool.release(queueItem.client)
}
this.activeQueue = without(this.activeQueue, queueItem)
}
var transferQueuedItems = function(count) {
for(var i = 0; i < count; i++) {
var queueItem = this.queue.shift();
if (queueItem) {
enqueue.call(this, queueItem)
}
}
}
var afterQuery = function(queueItem) {
dequeue.call(this, queueItem)
transferQueuedItems.call(this, this.maxConcurrentQueries - this.activeQueue.length)
disconnectIfNoConnections.call(this)
}
var execQueueItem = function(queueItem) {
var self = this
self.getConnection({
priority: queueItem.query.options.priority,
type: queueItem.query.options.type
}, function (err, connection) {
if (err) {
queueItem.query.emit('error', err)
return
}
queueItem.query.client = connection
queueItem.client = connection
queueItem.query
.success(function(){ afterQuery.call(self, queueItem) })
.error(function(){ afterQuery.call(self, queueItem) })
queueItem.query.run(queueItem.sql, queueItem.client)
})
}
ConnectorManager.prototype.__defineGetter__('hasQueuedItems', function() {
return (this.queue.length > 0) || (this.activeQueue.length > 0) || (this.client && this.client._queue && (this.client._queue.length > 0))
})
// legacy
ConnectorManager.prototype.__defineGetter__('hasNoConnections', function() {
return !this.hasQueuedItems
})
ConnectorManager.prototype.__defineGetter__('isConnected', function() {
return this.client != null
})
var disconnectIfNoConnections = function() {
var self = this
this.disconnectTimeoutId && clearTimeout(this.disconnectTimeoutId)
this.disconnectTimeoutId = setTimeout(function() {
self.isConnected && !self.hasQueuedItems && self.disconnect()
}, 100)
}
return ConnectorManager
})()
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