etcd

package
v0.4.4 Latest Latest
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 Go to latest Published: Jun 24, 2014 License: Apache-2.0 Imports: 18 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	// Using strings rather than iota because the consistency level
	// could be persisted to disk, so it'd be better to use
	// human-readable values.
	STRONG_CONSISTENCY = "STRONG"
	WEAK_CONSISTENCY   = "WEAK"
)

See SetConsistency for how to use these constants.

View Source 
const (
	ErrCodeEtcdNotReachable = 501
)

Variables

View Source 
var (
	VALID_GET_OPTIONS = validOptions{
		"recursive":  reflect.Bool,
		"consistent": reflect.Bool,
		"sorted":     reflect.Bool,
		"wait":       reflect.Bool,
		"waitIndex":  reflect.Uint64,
	}

	VALID_PUT_OPTIONS = validOptions{
		"prevValue": reflect.String,
		"prevIndex": reflect.Uint64,
		"prevExist": reflect.Bool,
		"dir":       reflect.Bool,
	}

	VALID_POST_OPTIONS = validOptions{}

	VALID_DELETE_OPTIONS = validOptions{
		"recursive": reflect.Bool,
		"dir":       reflect.Bool,
		"prevValue": reflect.String,
		"prevIndex": reflect.Uint64,
	}
)

Valid options for GET, PUT, POST, DELETE Using CAPITALIZED_UNDERSCORE to emphasize that these values are meant to be used as constants.

View Source 
var (
	ErrWatchStoppedByUser = errors.New("Watch stopped by the user via stop channel")
)

Errors introduced by the Watch command.

Functions

func SetLogger added in v0.3.0 

func SetLogger(log Logger)

Types

type Client 

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

func NewClient 

func NewClient(machines []string) *Client

NewClient create a basic client that is configured to be used with the given machine list.

func NewClientFromFile added in v0.3.0 

func NewClientFromFile(fpath string) (*Client, error)

NewClientFromFile creates a client from a given file path. The given file is expected to use the JSON format.

func NewClientFromReader added in v0.3.0 

func NewClientFromReader(reader io.Reader) (*Client, error)

NewClientFromReader creates a Client configured from a given reader. The configuration is expected to use the JSON format.

func NewTLSClient added in v0.3.0 

func NewTLSClient(machines []string, cert, key, caCert string) (*Client, error)

NewTLSClient create a basic client with TLS configuration

func (*Client) AddChild added in v0.2.0 

func (c *Client) AddChild(key string, value string, ttl uint64) (*Response, error)

Add a new file with a random etcd-generated key under the given path.

func (*Client) AddChildDir added in v0.2.0 

func (c *Client) AddChildDir(key string, ttl uint64) (*Response, error)

Add a new directory with a random etcd-generated key under the given path.

func (*Client) AddRootCA added in v0.3.0 

func (c *Client) AddRootCA(caCert string) error

AddRootCA adds a root CA cert for the etcd client

func (*Client) CloseCURL added in v0.2.0 

func (c *Client) CloseCURL()

func (*Client) CompareAndDelete added in v0.3.0 

func (c *Client) CompareAndDelete(key string, prevValue string, prevIndex uint64) (*Response, error)

func (*Client) CompareAndSwap added in v0.2.0 

func (c *Client) CompareAndSwap(key string, value string, ttl uint64,
	prevValue string, prevIndex uint64) (*Response, error)

func (*Client) Create added in v0.2.0 

func (c *Client) Create(key string, value string, ttl uint64) (*Response, error)

Create creates a file with the given value under the given key. It succeeds only if the given key does not yet exist.

func (*Client) CreateDir added in v0.2.0 

func (c *Client) CreateDir(key string, ttl uint64) (*Response, error)

CreateDir creates a directory. It succeeds only if the given key does not yet exist.

func (*Client) Delete 

func (c *Client) Delete(key string, recursive bool) (*Response, error)

Delete deletes the given key.

When recursive set to false, if the key points to a directory the method will fail.

When recursive set to true, if the key points to a file, the file will be deleted; if the key points to a directory, then everything under the directory (including all child directories) will be deleted.

func (*Client) DeleteDir added in v0.3.0 

func (c *Client) DeleteDir(key string) (*Response, error)

DeleteDir deletes an empty directory or a key value pair

func (*Client) Get 

func (c *Client) Get(key string, sort, recursive bool) (*Response, error)

Get gets the file or directory associated with the given key. If the key points to a directory, files and directories under it will be returned in sorted or unsorted order, depending on the sort flag. If recursive is set to false, contents under child directories will not be returned. If recursive is set to true, all the contents will be returned.

func (*Client) GetCluster added in v0.2.0 

func (c *Client) GetCluster() []string

func (*Client) MarshalJSON added in v0.2.0 

func (c *Client) MarshalJSON() ([]byte, error)

MarshalJSON implements the Marshaller interface as defined by the standard JSON package.

func (*Client) OpenCURL added in v0.2.0 

func (c *Client) OpenCURL()

func (*Client) RawCompareAndDelete added in v0.3.0 

func (c *Client) RawCompareAndDelete(key string, prevValue string, prevIndex uint64) (*RawResponse, error)

func (*Client) RawCompareAndSwap added in v0.3.0 

func (c *Client) RawCompareAndSwap(key string, value string, ttl uint64,
	prevValue string, prevIndex uint64) (*RawResponse, error)

func (*Client) RawCreate added in v0.2.0 

func (c *Client) RawCreate(key string, value string, ttl uint64) (*RawResponse, error)

func (*Client) RawCreateDir added in v0.2.0 

func (c *Client) RawCreateDir(key string, ttl uint64) (*RawResponse, error)

func (*Client) RawDelete added in v0.3.0 

func (c *Client) RawDelete(key string, recursive bool, dir bool) (*RawResponse, error)

func (*Client) RawGet added in v0.2.0 

func (c *Client) RawGet(key string, sort, recursive bool) (*RawResponse, error)

func (*Client) RawSet added in v0.2.0 

func (c *Client) RawSet(key string, value string, ttl uint64) (*RawResponse, error)

func (*Client) RawSetDir added in v0.2.0 

func (c *Client) RawSetDir(key string, ttl uint64) (*RawResponse, error)

func (*Client) RawUpdate added in v0.2.0 

func (c *Client) RawUpdate(key string, value string, ttl uint64) (*RawResponse, error)

func (*Client) RawUpdateDir added in v0.2.0 

func (c *Client) RawUpdateDir(key string, ttl uint64) (*RawResponse, error)

func (*Client) RawWatch added in v0.2.0 

func (c *Client) RawWatch(prefix string, waitIndex uint64, recursive bool,
	receiver chan *RawResponse, stop chan bool) (*RawResponse, error)

func (*Client) RecvCURL added in v0.2.0 

func (c *Client) RecvCURL() string

func (*Client) Set 

func (c *Client) Set(key string, value string, ttl uint64) (*Response, error)

Set sets the given key to the given value. It will create a new key value pair or replace the old one. It will not replace a existing directory.

func (*Client) SetCluster 

func (c *Client) SetCluster(machines []string) bool

SetCluster updates cluster information using the given machine list.

func (*Client) SetConsistency added in v0.2.0 

func (c *Client) SetConsistency(consistency string) error

SetConsistency changes the consistency level of the client.

When consistency is set to STRONG_CONSISTENCY, all requests, including GET, are sent to the leader. This means that, assuming the absence of leader failures, GET requests are guaranteed to see the changes made by previous requests.

When consistency is set to WEAK_CONSISTENCY, other requests are still sent to the leader, but GET requests are sent to a random server from the server pool. This reduces the read load on the leader, but it's not guaranteed that the GET requests will see changes made by previous requests (they might have not yet been committed on non-leader servers).

func (*Client) SetDir added in v0.2.0 

func (c *Client) SetDir(key string, ttl uint64) (*Response, error)

Set sets the given key to a directory. It will create a new directory or replace the old key value pair by a directory. It will not replace a existing directory.

func (*Client) SetKeyPrefix added in v0.3.0 

func (c *Client) SetKeyPrefix(prefix string)

SetKeyPrefix changes the key prefix from the default `/v2/keys` to whatever is set.

func (*Client) SetPersistence added in v0.2.0 

func (c *Client) SetPersistence(writer io.Writer)

SetPersistence sets a writer to which the config will be written every time it's changed.

func (*Client) SetTransport added in v0.3.0 

func (c *Client) SetTransport(tr *http.Transport)

Override the Client's HTTP Transport object

func (*Client) SyncCluster 

func (c *Client) SyncCluster() bool

SyncCluster updates the cluster information using the internal machine list.

func (*Client) UnmarshalJSON added in v0.2.0 

func (c *Client) UnmarshalJSON(b []byte) error

UnmarshalJSON implements the Unmarshaller interface as defined by the standard JSON package.

func (*Client) Update added in v0.2.0 

func (c *Client) Update(key string, value string, ttl uint64) (*Response, error)

Update updates the given key to the given value. It succeeds only if the given key already exists.

func (*Client) UpdateDir added in v0.2.0 

func (c *Client) UpdateDir(key string, ttl uint64) (*Response, error)

UpdateDir updates the given directory. It succeeds only if the given key already exists.

func (*Client) Watch 

func (c *Client) Watch(prefix string, waitIndex uint64, recursive bool,
	receiver chan *Response, stop chan bool) (*Response, error)

If recursive is set to true the watch returns the first change under the given prefix since the given index.

If recursive is set to false the watch returns the first change to the given key since the given index.

To watch for the latest change, set waitIndex = 0.

If a receiver channel is given, it will be a long-term watch. Watch will block at the channel. After someone receives the channel, it will go on to watch that prefix. If a stop channel is given, the client can close long-term watch using the stop channel.

type Cluster 

type Cluster struct {
	Leader   string   `json:"leader"`
	Machines []string `json:"machines"`
}

func NewCluster added in v0.3.0 

func NewCluster(machines []string) *Cluster

type Config 

type Config struct {
	CertFile    string        `json:"certFile"`
	KeyFile     string        `json:"keyFile"`
	CaCertFile  []string      `json:"caCertFiles"`
	Timeout     time.Duration `json:"timeout"`
	Consistency string        `json: "consistency"`
}

type EtcdError 

type EtcdError struct {
	ErrorCode int    `json:"errorCode"`
	Message   string `json:"message"`
	Cause     string `json:"cause,omitempty"`
	Index     uint64 `json:"index"`
}

func (EtcdError) Error 

func (e EtcdError) Error() string

type Logger added in v0.3.0 

type Logger interface {
	Debug(args ...interface{})
	Debugf(fmt string, args ...interface{})
	Warning(args ...interface{})
	Warningf(fmt string, args ...interface{})
}

func GetLogger added in v0.3.0 

func GetLogger() Logger

type Node added in v0.2.0 

type Node struct {
	Key           string     `json:"key, omitempty"`
	Value         string     `json:"value,omitempty"`
	Dir           bool       `json:"dir,omitempty"`
	Expiration    *time.Time `json:"expiration,omitempty"`
	TTL           int64      `json:"ttl,omitempty"`
	Nodes         Nodes      `json:"nodes,omitempty"`
	ModifiedIndex uint64     `json:"modifiedIndex,omitempty"`
	CreatedIndex  uint64     `json:"createdIndex,omitempty"`
}

type Nodes added in v0.2.0 

type Nodes []Node

func (Nodes) Len added in v0.2.0 

func (ns Nodes) Len() int

interfaces for sorting

func (Nodes) Less added in v0.2.0 

func (ns Nodes) Less(i, j int) bool

func (Nodes) Swap added in v0.2.0 

func (ns Nodes) Swap(i, j int)

type RawResponse added in v0.2.0 

type RawResponse struct {
	StatusCode int
	Body       []byte
	Header     http.Header
}

type Response added in v0.2.0 

type Response struct {
	Action    string `json:"action"`
	Node      *Node  `json:"node"`
	PrevNode  *Node  `json:"prevNode,omitempty"`
	EtcdIndex uint64 `json:"etcdIndex"`
	RaftIndex uint64 `json:"raftIndex"`
	RaftTerm  uint64 `json:"raftTerm"`
}

Source Files

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