bigtx

package module
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Published: Apr 29, 2016 License: MIT Imports: 6 Imported by: 0

README

go-bigtx

Simple two phase commits implementation on MongoDB with Golang

Goal

This library tries to implement two phase commits on MongoDB to process multi- account transactions. For example:

            Debit  Credit

Cash          100
  Inventory            80
  Profit               20

This transaction applies to 3 accounts and 1 transaction document.

To-do

  • Recovery
  • Rollback

Reference

The implementation follows the tutorial from MongoDB website.

This application is developed under MIT license, and can be used for open and proprietary projects.

Copyright (c) 2015 Chaiwat Shuetrakoonpaiboon

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Documentation

Index

Constants

View Source
const (
	TxInitial   TxState = "init"
	TxPending           = "pend"
	TxApplied           = "appl"
	TxDone              = "done"
	TxCanceling         = "cing"
	TxCanceled          = "canc"
)

Variables

This section is empty.

Functions

func Apply

func Apply(session *mgo.Session, tx *Transaction) error

func BeginTransaction

func BeginTransaction(txn string, debit map[string]int64, credit map[string]int64, note string) (string, error)

func CommitTransaction

func CommitTransaction() error

func Connect

func Connect()

func CreateAccount

func CreateAccount(acID string, side AccountSide) error

func Disconnect

func Disconnect()

func IsDuplicatedAcctErr

func IsDuplicatedAcctErr(err error) bool

func IsUnbalancedErr

func IsUnbalancedErr(err error) bool

func MarkDone

func MarkDone(session *mgo.Session, tx *Transaction) error

func ReadBalance

func ReadBalance(account string) (int64, error)

func Recover

func Recover() error

Recover resumes the transaction in process that crashed

Types

type Account

type Account struct {
	ID                  string    `bson:"_id"`
	Name                string    `bson:"name"`
	Side                string    `bson:"side"`
	Balance             int64     `bson:"bal"`
	Date                time.Time `bson:"date"`
	PendingTransactions []string  `bson:"txs"`
}

type AccountSide

type AccountSide string
const (
	AccountSideDebit  AccountSide = "dbt"
	AccountSideCredit             = "crd"
)

type Transaction

type Transaction struct {
	ID          bson.ObjectId    `bson:"_id"`
	Date        time.Time        `bson:"date"`
	Changes     map[string]int64 `bson:"chg"`
	State       TxState          `bson:"stat"`
	Ref1        string           `bson:"ref1,omitempty"`
	Ref2        string           `bson:"ref2,omitempty"`
	Description string           `bson:"dscr"`
}

type TxState

type TxState string

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