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Commit fe4cded5 by Felix Becker Committed by Jan Aagaard Meier
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ES6 refactor: Transaction (#6042) 

* Make Transaction an ES6 class

* ES6 refactor of Transaction

let, const, arrow functions, export default
1 parent bf19d9a9
Inline Side-by-side
Showing with 135 additions and 143 deletions
lib/transaction.js
'use strict';
var Utils = require('./utils')
, uuid = require('node-uuid');
const Utils = require('./utils');
const uuid = require('node-uuid');
/**
* The transaction object is used to identify a running transaction. It is created by calling `Sequelize.transaction()`.
......@@ -17,12 +17,13 @@ var Utils = require('./utils')
* @param {String} options.isolationLevel=true Sets the isolation level of the transaction.
* @param {String} options.deferrable Sets the constraints to be deferred or immediately checked.
*/
var Transaction = module.exports = function(sequelize, options) {
class Transaction {
constructor(sequelize, options) {
this.sequelize = sequelize;
this.savepoints = [];
// get dialect specific transaction options
var transactionOptions = sequelize.dialect.supports.transactionOptions || {};
const transactionOptions = sequelize.dialect.supports.transactionOptions || {};
this.options = Utils._.extend({
autocommit: transactionOptions.autocommit || null,
......@@ -42,7 +43,127 @@ var Transaction = module.exports = function(sequelize, options) {
}
delete this.options.transaction;
};
}
/**
* Commit the transaction
*
* @return {Promise}
*/
commit() {
if (this.finished) {
throw new Error('Transaction cannot be committed because it has been finished with state: ' + this.finished);
}
this.$clearCls();
return this
.sequelize
.getQueryInterface()
.commitTransaction(this, this.options)
.finally(() => {
this.finished = 'commit';
if (!this.parent) {
return this.cleanup();
}
return null;
});
}
/**
* Rollback (abort) the transaction
*
* @return {Promise}
*/
rollback() {
if (this.finished) {
throw new Error('Transaction cannot be rolled back because it has been finished with state: ' + this.finished);
}
this.$clearCls();
return this
.sequelize
.getQueryInterface()
.rollbackTransaction(this, this.options)
.finally(() => {
if (!this.parent) {
return this.cleanup();
}
return this;
});
}
prepareEnvironment() {
return Utils.Promise.resolve(this.parent ? this.parent.connection : this.sequelize.connectionManager.getConnection({ uuid: this.id }))
.then(connection => {
this.connection = connection;
this.connection.uuid = this.id;
})
.then(() => this.begin())
.then(() => this.setDeferrable())
.then(() => this.setIsolationLevel())
.then(() => this.setAutocommit())
.catch(setupErr => this.rollback().finally(() => {
throw setupErr;
}))
.tap(() => {
if (this.sequelize.constructor.cls) {
this.sequelize.constructor.cls.set('transaction', this);
}
return null;
});
}
begin() {
return this
.sequelize
.getQueryInterface()
.startTransaction(this, this.options);
}
setDeferrable () {
if (this.options.deferrable) {
return this
.sequelize
.getQueryInterface()
.deferConstraints(this, this.options);
}
}
setAutocommit() {
return this
.sequelize
.getQueryInterface()
.setAutocommit(this, this.options.autocommit, this.options);
}
setIsolationLevel() {
return this
.sequelize
.getQueryInterface()
.setIsolationLevel(this, this.options.isolationLevel, this.options);
}
cleanup() {
const res = this.sequelize.connectionManager.releaseConnection(this.connection);
this.connection.uuid = undefined;
return res;
}
$clearCls () {
const cls = this.sequelize.constructor.cls;
if (cls) {
if (cls.get('transaction') === this) {
cls.set('transaction', null);
}
}
}
}
/**
* Types can be set per-transaction by passing `options.type` to `sequelize.transaction`.
......@@ -62,15 +183,13 @@ var Transaction = module.exports = function(sequelize, options) {
* Pass in the desired level as the first argument:
*
* ```js
* return sequelize.transaction({
* type: Sequelize.Transaction.EXCLUSIVE
* }, function (t) {
* return sequelize.transaction({type: Sequelize.Transaction.EXCLUSIVE}, transaction => {
*
* // your transactions
*
* }).then(function(result) {
* }).then(result => {
* // transaction has been committed. Do something after the commit if required.
* }).catch(function(err) {
* }).catch(err => {
* // do something with the err.
* });
* ```
......@@ -83,7 +202,6 @@ Transaction.TYPES = {
EXCLUSIVE: 'EXCLUSIVE'
};
/**
* Isolations levels can be set per-transaction by passing `options.isolationLevel` to `sequelize.transaction`.
* Default to `REPEATABLE_READ` but you can override the default isolation level by passing `options.isolationLevel` in `new Sequelize`.
......@@ -102,15 +220,13 @@ Transaction.TYPES = {
* Pass in the desired level as the first argument:
*
* ```js
* return sequelize.transaction({
* isolationLevel: Sequelize.Transaction.SERIALIZABLE
* }, function (t) {
* return sequelize.transaction({isolationLevel: Sequelize.Transaction.SERIALIZABLE}, transaction => {
*
* // your transactions
*
* }).then(function(result) {
* }).then(result => {
* // transaction has been committed. Do something after the commit if required.
* }).catch(function(err) {
* }).catch(err => {
* // do something with the err.
* });
* ```
......@@ -168,130 +284,6 @@ Transaction.LOCK = Transaction.prototype.LOCK = {
NO_KEY_UPDATE: 'NO KEY UPDATE'
};
/**
* Commit the transaction
*
* @return {Promise}
*/
Transaction.prototype.commit = function() {
var self = this;
if (this.finished) {
throw new Error('Transaction cannot be committed because it has been finished with state: ' + self.finished);
}
this.$clearCls();
return this
.sequelize
.getQueryInterface()
.commitTransaction(this, this.options)
.finally(function() {
self.finished = 'commit';
if (!self.parent) {
return self.cleanup();
}
return null;
});
};
/**
* Rollback (abort) the transaction
*
* @return {Promise}
*/
Transaction.prototype.rollback = function() {
var self = this;
if (this.finished) {
throw new Error('Transaction cannot be rolled back because it has been finished with state: ' + self.finished);
}
this.$clearCls();
return this
.sequelize
.getQueryInterface()
.rollbackTransaction(this, this.options)
.finally(function() {
if (!self.parent) {
return self.cleanup();
}
return self;
});
};
Transaction.prototype.prepareEnvironment = function() {
var self = this;
return Utils.Promise.resolve(
self.parent ? self.parent.connection : self.sequelize.connectionManager.getConnection({ uuid: self.id })
).then(function (connection) {
self.connection = connection;
self.connection.uuid = self.id;
}).then(function () {
return self.begin();
}).then(function () {
return self.setDeferrable();
}).then(function () {
return self.setIsolationLevel();
}).then(function () {
return self.setAutocommit();
}).catch(function (setupErr) {
return self.rollback().finally(function () {
throw setupErr;
});
}).tap(function () {
if (self.sequelize.constructor.cls) {
self.sequelize.constructor.cls.set('transaction', self);
}
return null;
});
};
Transaction.prototype.begin = function() {
return this
.sequelize
.getQueryInterface()
.startTransaction(this, this.options);
};
Transaction.prototype.setDeferrable = function () {
if (this.options.deferrable) {
return this
.sequelize
.getQueryInterface()
.deferConstraints(this, this.options);
}
};
Transaction.prototype.setAutocommit = function() {
return this
.sequelize
.getQueryInterface()
.setAutocommit(this, this.options.autocommit, this.options);
};
Transaction.prototype.setIsolationLevel = function() {
return this
.sequelize
.getQueryInterface()
.setIsolationLevel(this, this.options.isolationLevel, this.options);
};
Transaction.prototype.cleanup = function() {
var res = this.sequelize.connectionManager.releaseConnection(this.connection);
this.connection.uuid = undefined;
return res;
};
Transaction.prototype.$clearCls = function () {
var cls = this.sequelize.constructor.cls;
if (cls) {
if (cls.get('transaction') === this) {
cls.set('transaction', null);
}
}
};
module.exports = Transaction;
module.exports.Transaction = Transaction;
module.exports.default = Transaction;
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