eventsourcedb

package module

v0.0.0-...-39392a2 Latest Latest Go to latest Published: May 19, 2016 License: Apache-2.0 Imports: 11 Imported by: 0

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Repository

github.com/eventsourcedb/eventsourcedb

Links

Open Source Insights

README ¶

EventSourceDB

What is it about?

This is a database to provide easy EventSourcing adoption at your organizarion, to safely store the source of truth about state of your application.

Status

ALPHA-GRADE SOFTWARE. NOT FOR PRODUCTION USE (YET).

Features

JSON-enabled streaming HTTP2 API.
Pub/Sub.
Proxy-friendly.
Operations-friendly (backup, restore, scale as easy as adding new http proxies).
Uses Bolt as transactional, fast, and reliable storage.
Append-only workflow.
Yet it's possible to delete retired streams.

Install & Use

Build requirments:

make
Glide
Go 1.6+

Following command will install binaries into your $GOPATH/bin.

$ make deps install

Why HTTP2?

HTTP2 brings many advantages for such RPC-ish system, multiplexing multiple requests over a single TCP connection, flow control, header compression, binary encoding. Yet everyone are familiar with HTTP semantics.

Why not gRPC then?

To keep things simple. Simple requests, simple JSON, simple proxies. And to maintain some level of compatibility with HTTP1 clients (although, not recommended to use).

Client libraries

At the moment we don't have specific API client libraries but any HTTP2 library will work.

It's possible to use HTTP1 but highly not recommended, since it will introduce huge overhead on connections.

Roadmap

Our Roadmap

License

Apache 2.0

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Documentation ¶

Index ¶

Constants
func Routes() http.Handler
type BoltDB
- func OpenBolt(fname string) (*BoltDB, error)
- func (b *BoltDB) Close() error
- func (b *BoltDB) Fetch(firstID, lastID uint64) (Cursor, error)
- func (b *BoltDB) Insert(events ...Event) (uint64, error)
type Cursor
type DB
type Env
type Error
- func (e Error) Error() string
type Event
- func (mj *Event) MarshalJSON() ([]byte, error)
- func (mj *Event) MarshalJSONBuf(buf fflib.EncodingBuffer) error
- func (uj *Event) UnmarshalJSON(input []byte) error
- func (uj *Event) UnmarshalJSONFFLexer(fs *fflib.FFLexer, state fflib.FFParseState) error
type Hub
- func NewHub(opts ...HubOpt) *Hub
- func (h *Hub) Cancel(sub *Sub)
- func (h *Hub) Pub(evts ...Event) error
- func (h *Hub) Sub() *Sub
type HubOpt
type ID
- func New(shardKey uint64) ID
type Sub
- func (s *Sub) Next() (Cursor, error)

Constants ¶

View Source

const (
	ErrCloseTimeout = Error("database close timeout")
	ErrDBClosed     = Error("database already closed")
)

View Source

const (
	ErrNoEventsData = Error("no events data")
	EOS             = Error("end of stream")
)

View Source

const (
	OurEpoch = 1455209242000 // OUR epoch starts from this millisecond since unix epoch

)

Variables ¶

This section is empty.

Functions ¶

func Routes ¶

func Routes() http.Handler

Types ¶

type BoltDB ¶

type BoltDB struct {
	// contains filtered or unexported fields
}

func OpenBolt ¶

func OpenBolt(fname string) (*BoltDB, error)

func (*BoltDB) Close ¶

func (b *BoltDB) Close() error

func (*BoltDB) Fetch ¶

func (b *BoltDB) Fetch(firstID, lastID uint64) (Cursor, error)

func (*BoltDB) Insert ¶

func (b *BoltDB) Insert(events ...Event) (uint64, error)

type Cursor ¶

type Cursor interface {
	Next() (Event, error)
}

type DB ¶

type DB interface {
	Insert(events ...Event) (uint64, error)
	Fetch(firstID, lastID uint64) (Cursor, error)
	Close() error
}

type Env ¶

type Env struct {
	DB *bolt.DB
}

type Error ¶

type Error string

func (Error) Error ¶

func (e Error) Error() string

type Event ¶

type Event struct {
	ID     uint64          `json:"id"`
	Stream string          `json:"stream"`
	Type   string          `json:"type"`
	Body   json.RawMessage `json:"body"`
}

func (*Event) MarshalJSON ¶

func (mj *Event) MarshalJSON() ([]byte, error)

func (*Event) MarshalJSONBuf ¶

func (mj *Event) MarshalJSONBuf(buf fflib.EncodingBuffer) error

func (*Event) UnmarshalJSON ¶

func (uj *Event) UnmarshalJSON(input []byte) error

func (*Event) UnmarshalJSONFFLexer ¶

func (uj *Event) UnmarshalJSONFFLexer(fs *fflib.FFLexer, state fflib.FFParseState) error

type Hub ¶

type Hub struct {
	// contains filtered or unexported fields
}

func NewHub ¶

func NewHub(opts ...HubOpt) *Hub

func (*Hub) Cancel ¶

func (h *Hub) Cancel(sub *Sub)

func (*Hub) Pub ¶

func (h *Hub) Pub(evts ...Event) error

func (*Hub) Sub ¶

func (h *Hub) Sub() *Sub

type HubOpt ¶

type HubOpt func(*Hub)

type ID ¶

type ID uint64

func New ¶

func New(shardKey uint64) ID

type Sub ¶

type Sub struct {
	Events chan uint64
	// contains filtered or unexported fields
}

func (*Sub) Next ¶

func (s *Sub) Next() (Cursor, error)

Source Files ¶

View all Source files

Directories ¶

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