bolt

Documentation

Index

• Variables
• type BrokerWatcher
  • func (pdb *BrokerWatcher) Delete(key string, opts ...datasync.DelOption) (existed bool, err error)
  • func (pdb *BrokerWatcher) GetValue(key string) (data []byte, found bool, revision int64, err error)
  • func (pdb *BrokerWatcher) ListKeys(keyPrefix string) (keyval.BytesKeyIterator, error)
  • func (pdb *BrokerWatcher) ListValues(keyPrefix string) (keyval.BytesKeyValIterator, error)
  • func (pdb *BrokerWatcher) NewTxn() keyval.BytesTxn
  • func (pdb *BrokerWatcher) Put(key string, data []byte, opts ...datasync.PutOption) error
  • func (pdb *BrokerWatcher) Watch(resp func(keyval.BytesWatchResp), closeChan chan string, keys ...string) error
• type Client
  • func NewClient(cfg *Config) (client *Client, err error)
  • func (c *Client) Close() error
  • func (c *Client) Delete(key string, opts ...datasync.DelOption) (existed bool, err error)
  • func (c *Client) GetValue(key string) (data []byte, found bool, revision int64, err error)
  • func (c *Client) ListKeys(keyPrefix string) (keyval.BytesKeyIterator, error)
  • func (c *Client) ListValues(keyPrefix string) (keyval.BytesKeyValIterator, error)
  • func (c *Client) NewBroker(prefix string) keyval.BytesBroker
  • func (c *Client) NewTxn() keyval.BytesTxn
  • func (c *Client) NewWatcher(prefix string) keyval.BytesWatcher
  • func (c *Client) Put(key string, data []byte, opts ...datasync.PutOption) (err error)
  • func (c *Client) Watch(resp func(keyval.BytesWatchResp), closeChan chan string, keys ...string) error
• type Config
• type Deps
• type Option
  • func UseDeps(cb func(*Deps)) Option
• type Plugin
  • func NewPlugin(opts ...Option) *Plugin
  • func (p *Plugin) Close() error
  • func (p *Plugin) Disabled() bool
  • func (p *Plugin) Init() (err error)
  • func (p *Plugin) NewBroker(keyPrefix string) keyval.ProtoBroker
  • func (p *Plugin) NewWatcher(keyPrefix string) keyval.ProtoWatcher
  • func (p *Plugin) OnConnect(callback func() error)

Variables

var (
	// UpdatesChannelSize defines size for the channel
	// used for sending updates through single writer
	UpdatesChannelSize = 100

	// DefaultSafeUpdateTimeout is used as default timeout
	// for waiting on result from updater.
	DefaultSafeUpdateTimeout = time.Second
)

var DefaultPlugin = *NewPlugin()

DefaultPlugin is a default instance of Plugin.

Types

type BrokerWatcher

type BrokerWatcher struct {
	*Client
	// contains filtered or unexported fields
}

BrokerWatcher uses Client to access the datastore. The connection can be shared among multiple BrokerWatcher. In case of accessing a particular subtree in Bolt only, BrokerWatcher allows defining a keyPrefix that is prepended to all keys in its methods in order to shorten keys used in arguments.

func (*BrokerWatcher) Delete

func (pdb *BrokerWatcher) Delete(key string, opts ...datasync.DelOption) (existed bool, err error)

Delete calls 'Delete' function of the underlying Client. KeyPrefix defined in constructor is prepended to the key argument.

func (*BrokerWatcher) GetValue

func (pdb *BrokerWatcher) GetValue(key string) (data []byte, found bool, revision int64, err error)

GetValue calls 'GetValue' function of the underlying Client. KeyPrefix defined in constructor is prepended to the key argument.

func (*BrokerWatcher) ListKeys

func (pdb *BrokerWatcher) ListKeys(keyPrefix string) (keyval.BytesKeyIterator, error)

ListKeys calls 'ListKeys' function of the underlying Client. KeyPrefix defined in constructor is prepended to the argument.

func (*BrokerWatcher) ListValues

func (pdb *BrokerWatcher) ListValues(keyPrefix string) (keyval.BytesKeyValIterator, error)

ListValues calls 'ListValues' function of the underlying Client. KeyPrefix defined in constructor is prepended to the key argument. The prefix is removed from the keys of the returned values.

func (*BrokerWatcher) NewTxn

func (pdb *BrokerWatcher) NewTxn() keyval.BytesTxn

NewTxn creates a new transaction. KeyPrefix defined in constructor will be prepended to all key arguments in the transaction.

func (*BrokerWatcher) Put

func (pdb *BrokerWatcher) Put(key string, data []byte, opts ...datasync.PutOption) error

Put calls 'Put' function of the underlying Client. KeyPrefix defined in constructor is prepended to the key argument.

func (*BrokerWatcher) Watch

func (pdb *BrokerWatcher) Watch(resp func(keyval.BytesWatchResp), closeChan chan string, keys ...string) error

Watch starts subscription for changes associated with the selected <keys>. KeyPrefix defined in constructor is prepended to all <keys> in the argument list. The prefix is removed from the keys returned in watch events. Watch events will be delivered to <resp> callback.

type Client

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

Client serves as a client for Bolt KV storage and implements keyval.CoreBrokerWatcher interface.

func NewClient

func NewClient(cfg *Config) (client *Client, err error)

NewClient creates new client for Bolt using given config.

func (*Client) Close

func (c *Client) Close() error

Close closes Bolt database.

func (*Client) Delete

func (c *Client) Delete(key string, opts ...datasync.DelOption) (existed bool, err error)

Delete deletes given key

func (*Client) GetValue

func (c *Client) GetValue(key string) (data []byte, found bool, revision int64, err error)

GetValue returns data for the given key

func (*Client) ListKeys

func (c *Client) ListKeys(keyPrefix string) (keyval.BytesKeyIterator, error)

ListKeys returns iterator with keys for given key prefix

func (*Client) ListValues

func (c *Client) ListValues(keyPrefix string) (keyval.BytesKeyValIterator, error)

ListValues returns iterator with key-value pairs for given key prefix

func (*Client) NewBroker

func (c *Client) NewBroker(prefix string) keyval.BytesBroker

NewBroker creates a new instance of a proxy that provides access to Bolt. The proxy will reuse the connection from Client. <prefix> will be prepended to the key argument in all calls from the created BrokerWatcher. To avoid using a prefix, pass keyval. Root constant as an argument.

func (*Client) NewTxn

func (c *Client) NewTxn() keyval.BytesTxn

NewTxn creates new transaction

func (*Client) NewWatcher

func (c *Client) NewWatcher(prefix string) keyval.BytesWatcher

NewWatcher creates a new instance of a proxy that provides access to Bolt. The proxy will reuse the connection from Client. <prefix> will be prepended to the key argument in all calls on created BrokerWatcher. To avoid using a prefix, pass keyval. Root constant as an argument.

func (*Client) Put

func (c *Client) Put(key string, data []byte, opts ...datasync.PutOption) (err error)

Put stores given data for the key

func (*Client) Watch

func (c *Client) Watch(resp func(keyval.BytesWatchResp), closeChan chan string, keys ...string) error

Watch watches given list of key prefixes.

type Config

type Config struct {
	DbPath          string        `json:"db-path"`
	FileMode        os.FileMode   `json:"file-mode"`
	LockTimeout     time.Duration `json:"lock-timeout"`
	FilterDupNotifs bool          `json:"filter-duplicate-notifications"`
}

Config represents configuration for Bolt plugin.

type Deps

type Deps struct {
	infra.PluginDeps
}

Deps lists dependencies of the Bolt plugin. If injected, Bolt plugin will use StatusCheck to signal the connection status.

type Option

type Option func(*Plugin)

Option is a function that can be used in NewPlugin to customize Plugin.

func UseDeps

func UseDeps(cb func(*Deps)) Option

UseDeps returns Option that can inject custom dependencies.

type Plugin

type Plugin struct {
	Deps
	*Config
	// contains filtered or unexported fields
}

Plugin implements bolt plugin.

func NewPlugin

func NewPlugin(opts ...Option) *Plugin

NewPlugin creates a new Plugin with the provided Options.

func (*Plugin) Close

func (p *Plugin) Close() error

Close closes the Bolt client.

func (*Plugin) Disabled

func (p *Plugin) Disabled() bool

Disabled returns *true* if the plugin is not in use due to missing configuration.

func (*Plugin) Init

func (p *Plugin) Init() (err error)

Init initializes Bolt plugin.

func (*Plugin) NewBroker

func (p *Plugin) NewBroker(keyPrefix string) keyval.ProtoBroker

NewBroker creates new instance of prefixed broker that provides API with arguments of type proto.Message.

func (*Plugin) NewWatcher

func (p *Plugin) NewWatcher(keyPrefix string) keyval.ProtoWatcher

NewWatcher creates new instance of prefixed broker that provides API with arguments of type proto.Message.

func (*Plugin) OnConnect

func (p *Plugin) OnConnect(callback func() error)

OnConnect executes callback from datasync