transaction.js
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var Utils = require('./utils')
, util = require('util')
var Transaction = module.exports = function(sequelize, options) {
this.sequelize = sequelize
this.id = Utils.generateUUID()
this.options = Utils._.extend({
autocommit: true,
isolationLevel: Transaction.ISOLATION_LEVELS.REPEATABLE_READ
}, options || {})
}
util.inherits(Transaction, Utils.CustomEventEmitter)
Transaction.ISOLATION_LEVELS = {
READ_UNCOMMITTED: "READ UNCOMMITTED",
READ_COMMITTED: "READ COMMITTED",
REPEATABLE_READ: "REPEATABLE READ",
SERIALIZABLE: "SERIALIZABLE"
}
Transaction.prototype.commit = function() {
return this
.sequelize
.getQueryInterface()
.commitTransaction(this, {})
.proxy(this)
.done(this.cleanup.bind(this))
}
Transaction.prototype.rollback = function() {
return this
.sequelize
.getQueryInterface()
.rollbackTransaction(this, {})
.proxy(this)
.done(this.cleanup.bind(this))
}
Transaction.prototype.prepareEnvironment = function(callback) {
var self = this
, connectorManager = self.sequelize.transactionManager.getConnectorManager(this.id)
this.begin(function() {
self.setIsolationLevel(function() {
self.setAutocommit(function() {
connectorManager.afterTransactionSetup(callback)
})
})
})
}
Transaction.prototype.begin = function(callback) {
this
.sequelize
.getQueryInterface()
.startTransaction(this, {})
.success(callback)
.error(onError.bind(this))
}
Transaction.prototype.setAutocommit = function(callback) {
this
.sequelize
.getQueryInterface()
.setAutocommit(this, this.options.autocommit)
.success(callback)
.error(onError.bind(this))
}
Transaction.prototype.setIsolationLevel = function(callback) {
this
.sequelize
.getQueryInterface()
.setIsolationLevel(this, this.options.isolationLevel)
.success(callback)
.error(onError.bind(this))
}
Transaction.prototype.cleanup = function() {
this.sequelize.transactionManager.releaseConnectionManager(this.id)
}
// private
var onError = function(err) {
this.emit('error', err)
}