model

package
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 Go to latest Published: Sep 24, 2024 License: Apache-2.0 Imports: 12 Imported by: 0

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Index

Constants

View Source 
const (
	UnknownKVClientType = iota
	EtcdKVClientType
	SQLKVClientType
	MockKVClientType
)

define client type

View Source 
const (

	// StoreTypeEtcd is the store type string for etcd
	StoreTypeEtcd = "etcd"
	// StoreTypeMySQL is the store type string for MySQL
	StoreTypeMySQL = "mysql"

	// StoreTypeSQLite is the store type string for SQLite
	// Only for test now
	StoreTypeSQLite = "sqlite"
	// StoreTypeMockKV is a specific store type which can generate
	// a mock kvclient (using map as backend)
	// Only for test now
	StoreTypeMockKV = "mock-kv"
)

Variables

This section is empty.

Functions

func GenerateDSNByParams 

func GenerateDSNByParams(storeConf *StoreConfig, pairs map[string]string) (string, error)

GenerateDSNByParams generates a dsn string. dsn format: [username[:password]@][protocol[(address)]]/

func GetPrefixRangeEnd 

func GetPrefixRangeEnd(prefix string) string

GetPrefixRangeEnd gets the range end of the prefix. 'Get(foo, WithPrefix())' is equal to 'Get(foo, WithRange(GetPrefixRangeEnd(foo))'.

func IsOptsWithFromKey 

func IsOptsWithFromKey(opts []OpOption) bool

IsOptsWithFromKey returns true if WithFromKey option is called in the given opts.

func IsOptsWithPrefix 

func IsOptsWithPrefix(opts []OpOption) bool

IsOptsWithPrefix returns true if WithPrefix option is called in the given opts.

func IsOptsWithRange 

func IsOptsWithRange(opts []OpOption) bool

IsOptsWithRange returns true if WithRange option is called in the given opts.

Types

type AuthConfParams 

type AuthConfParams struct {
	User   string `toml:"user" json:"user"`
	Passwd string `toml:"passwd" json:"passwd"`
}

AuthConfParams is basic authentication configurations

type Client 

type Client interface {
	// Close is the method to close the client and release inner resources
	Close() error

	// GenEpoch generate the increasing epoch for user
	GenEpoch(ctx context.Context) (int64, error)
}

Client defines some basic method used as a meta client

type ClientConn 

type ClientConn interface {
	// StoreType returns the type of connection
	StoreType() StoreType

	// GetConn gets the underlying connection object
	// For the fisrt return param if no error happens:
	// For StoreTypeEtcd, it returns *clientv3.Client
	// For StoreTypeMySQL/StoreTypeSQLite, it returns *sql.DB
	GetConn() (interface{}, error)

	// Close closes the underlying connection and releases some resources
	Close() error
}

ClientConn is the common method for different connection HOPE to reuse the common underlying connection pool

type ClientType 

type ClientType int

ClientType indicates the kvclient type

func ToClientType 

func ToClientType(storeType StoreType) ClientType

ToClientType translates store type to client type

func (ClientType) String 

func (t ClientType) String() string

String implements the Stringer interface

type DeleteResponse 

type DeleteResponse struct {
	Header *ResponseHeader
}

DeleteResponse .

func (*DeleteResponse) OpResponse 

func (resp *DeleteResponse) OpResponse() OpResponse

OpResponse generates a delete OpResponse from DeleteResponse

type Error 

type Error interface {
	error
	// IsRetryable returns true if this error may be gone if retried.
	IsRetryable() bool
}

Error defines the interface used in KV interface

type GetResponse 

type GetResponse struct {
	Header *ResponseHeader
	// kvs is the list of key-value pairs matched by the range request.
	Kvs []*KeyValue
}

GetResponse .

func (*GetResponse) OpResponse 

func (resp *GetResponse) OpResponse() OpResponse

OpResponse generates a get OpResponse from GetResponse

func (*GetResponse) String 

func (resp *GetResponse) String() string

String only for debug

type JobID 

type JobID = model.JobID

JobID is the alias of model.JobID

type KV 

type KV interface {
	// Put puts a key-value pair into metastore.
	// Note that key,value can be plain bytes array and string is
	// an immutable representation of that bytes array.
	// To get a string of bytes, do string([]byte{0x10, 0x20}).
	// or do nothing on vice verse.
	// Length of key is restricted to 2KB
	Put(ctx context.Context, key, val string) (*PutResponse, Error)

	// Get retrieves keys with newest revision.
	// By default, Get will return the value for "key", if any.
	// When WithRange(end) is passed, Get will return the keys in the range [key, end).
	// When WithFromKey() is passed, Get returns keys greater than or equal to key.
	// When WithPrefix() is passed, Get returns keys with prefix.
	// WARN: WithRange(), WithFromKey(), WithPrefix() can't be used at the same time
	Get(ctx context.Context, key string, opts ...OpOption) (*GetResponse, Error)

	// Delete deletes a key, or optionally using WithRange(end), [key, end).
	// WARN: WithRange(end), WithFromKey(), WithPrefix() can't be used at the same time
	Delete(ctx context.Context, key string, opts ...OpOption) (*DeleteResponse, Error)

	// Txn creates a transaction.
	Txn(ctx context.Context) Txn
}

KV defines a key value access interface, which is quite similar to etcd KV API

type KVClient 

type KVClient interface {
	Client
	KV
}

KVClient combines Client interface and KV interface

type KeyValue 

type KeyValue struct {
	// Key is the key in bytes. An empty key is not allowed.
	Key []byte `gorm:"column:meta_key;type:varbinary(2048) not null;uniqueIndex:uidx_jk,priority:2"`
	// Value is the value held by the key, in bytes.
	Value []byte `gorm:"column:meta_value;type:longblob"`
}

KeyValue defines a key value byte slice pair

func (*KeyValue) String 

func (kv *KeyValue) String() string

String only for debug

type Op 

type Op struct {
	T opType
	// contains filtered or unexported fields
}

Op represents an Operation that kv can execute. Support Key Range/From Key/Key Prefix attributes 

var EmptyOp Op = Op{}

EmptyOp creates a global empty op

func NewOp 

func NewOp() *Op

NewOp creates a new op instance

func OpDelete 

func OpDelete(key string, opts ...OpOption) Op

OpDelete returns "delete" operation based on given key and operation options.

func OpGet 

func OpGet(key string, opts ...OpOption) Op

OpGet returns "get" operation based on given key and operation options.

func OpPut 

func OpPut(key, val string) Op

OpPut returns "put" operation based on given key-value.

func OpTxn 

func OpTxn(ops []Op) Op

OpTxn returns "txn" operation based on given transaction conditions.

func (*Op) ApplyOpts 

func (op *Op) ApplyOpts(opts []OpOption)

ApplyOpts calls given option function one by one

func (Op) CheckValidOp 

func (op Op) CheckValidOp() error

CheckValidOp checks whether op is valid

func (Op) IsDelete 

func (op Op) IsDelete() bool

IsDelete returns true if the operation is a Delete.

func (Op) IsGet 

func (op Op) IsGet() bool

IsGet returns true if the operation is a Get.

func (Op) IsOptsWithFromKey 

func (op Op) IsOptsWithFromKey() bool

IsOptsWithFromKey returns true if WithFromKey option is called in the given opts.

func (Op) IsOptsWithPrefix 

func (op Op) IsOptsWithPrefix() bool

IsOptsWithPrefix returns true if WithPrefix option is called in the given opts.

func (Op) IsOptsWithRange 

func (op Op) IsOptsWithRange() bool

IsOptsWithRange returns true if WithRange option is called in the given opts.

func (Op) IsPut 

func (op Op) IsPut() bool

IsPut returns true if the operation is a Put.

func (Op) IsTxn 

func (op Op) IsTxn() bool

IsTxn returns true if the "Op" type is transaction.

func (Op) KeyBytes 

func (op Op) KeyBytes() []byte

KeyBytes returns the byte slice holding the Op's key.

func (Op) RangeBytes 

func (op Op) RangeBytes() []byte

RangeBytes returns the byte slice holding with the Op's range end, if any.

func (Op) Txn 

func (op Op) Txn() []Op

Txn returns the operations.

func (Op) ValueBytes 

func (op Op) ValueBytes() []byte

ValueBytes returns the byte slice holding the Op's value, if any.

func (*Op) WithKeyBytes 

func (op *Op) WithKeyBytes(key []byte)

WithKeyBytes set the byte slice to the Op's key.

func (*Op) WithRangeBytes 

func (op *Op) WithRangeBytes(end []byte)

WithRangeBytes set the byte slice to the Op's range end

type OpOption 

type OpOption func(*Op)

OpOption configures Operations like Get, Put, Delete.

func WithFromKey 

func WithFromKey() OpOption

WithFromKey specifies the range of 'Get', 'Delete' requests to be equal or greater than the key in the argument.

func WithPrefix 

func WithPrefix() OpOption

WithPrefix enables 'Get', 'Delete' requests to operate on the keys with matching prefix. For example, 'Get(foo, WithPrefix())' can return 'foo1', 'foo2', and so on.

func WithRange 

func WithRange(endKey string) OpOption

WithRange specifies the range of 'Get', 'Delete' requests. For example, 'Get' requests with 'WithRange(end)' returns the keys in the range [key, end). endKey must be lexicographically greater than start key.

type OpResponse 

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

OpResponse contains a list of put/get/del/txn response

func (OpResponse) Del 

func (op OpResponse) Del() *DeleteResponse

Del returns a DelResponse

func (OpResponse) Get 

func (op OpResponse) Get() *GetResponse

Get returns a GetResponse

func (OpResponse) Put 

func (op OpResponse) Put() *PutResponse

Put returns a PutResponse

func (OpResponse) Txn 

func (op OpResponse) Txn() *TxnResponse

Txn returns a TxnResponse

type ProjectID 

type ProjectID = tenant.ProjectID

ProjectID is the alia of tenant.ProjectID

type PutResponse 

type PutResponse struct {
	Header *ResponseHeader
}

PutResponse .

func (*PutResponse) OpResponse 

func (resp *PutResponse) OpResponse() OpResponse

OpResponse generates a put OpResponse from PutResponse

type ResponseHeader 

type ResponseHeader struct {
	// ClusterId is the ID of the cluster which sent the response.
	// Framework will generate uuid for every newcoming metastore
	ClusterID string
}

ResponseHeader is common response header

func (*ResponseHeader) String 

func (h *ResponseHeader) String() string

String only for debug

type ResponseOp 

type ResponseOp struct {
	// response is a union of response types returned by a transaction.
	//
	// Types that are valid to be assigned to Response:
	//	*ResponseOp_ResponseRange
	//	*ResponseOp_ResponsePut
	//	*ResponseOp_ResponseDeleteRange
	//	*ResponseOp_ResponseTxn
	Response isResponseOpResponse
}

ResponseOp defines a response operation, the op is one of get/put/delete/txn

func (*ResponseOp) GetResponse 

func (m *ResponseOp) GetResponse() isResponseOpResponse

GetResponse returns an isResponseOpResponse interface

func (*ResponseOp) GetResponseDelete 

func (m *ResponseOp) GetResponseDelete() *DeleteResponse

GetResponseDelete returns a ResponseDelete if it matches

func (*ResponseOp) GetResponseGet 

func (m *ResponseOp) GetResponseGet() *GetResponse

GetResponseGet returns a ResponseGet if it matches

func (*ResponseOp) GetResponsePut 

func (m *ResponseOp) GetResponsePut() *PutResponse

GetResponsePut returns a ResponsePut if it matches

func (*ResponseOp) GetResponseTxn 

func (m *ResponseOp) GetResponseTxn() *TxnResponse

GetResponseTxn returns a ResponseTxn if it matches

type ResponseOpResponseDelete 

type ResponseOpResponseDelete struct {
	ResponseDelete *DeleteResponse
}

ResponseOpResponseDelete defines an op that wraps DeleteResponse

type ResponseOpResponseGet 

type ResponseOpResponseGet struct {
	ResponseGet *GetResponse
}

ResponseOpResponseGet defines an op that wraps GetResponse

type ResponseOpResponsePut 

type ResponseOpResponsePut struct {
	ResponsePut *PutResponse
}

ResponseOpResponsePut defines an op that wraps PutResponse

type ResponseOpResponseTxn 

type ResponseOpResponseTxn struct {
	ResponseTxn *TxnResponse
}

ResponseOpResponseTxn defines an op that wraps TxnResponse

type StoreConfig 

type StoreConfig struct {
	// StoreID is the unique readable identifier for a store
	StoreID string `toml:"store-id" json:"store-id"`
	// StoreType supports 'etcd' or 'mysql', default is 'mysql'
	StoreType StoreType `toml:"store-type" json:"store-type"`
	Endpoints []string  `toml:"endpoints" json:"endpoints"`
	User      string    `toml:"user" json:"user"`
	Password  string    `toml:"password" json:"password"`
	// Schema is the predefine schema name for mysql-compatible metastore
	// 1.It needs to stay UNCHANGED for one dataflow engine cluster
	// 2.It needs be different between any two dataflow engine clusters
	// 3.Naming rule: https://dev.mysql.com/doc/refman/5.7/en/identifiers.html
	Schema       string `toml:"schema" json:"schema"`
	ReadTimeout  string `toml:"read-timeout" json:"read-timeout"`
	WriteTimeout string `toml:"write-timeout" json:"write-timeout"`
	DialTimeout  string `toml:"dial-timeout" json:"dial-timeout"`
	// DBConf is the db config for mysql-compatible metastore
	DBConf *dbutil.DBConfig `toml:"dbconfs" json:"dbconfs"`

	Security *security.Credential `toml:"security" json:"security"`
}

StoreConfig is metastore connection configurations

func DefaultStoreConfig 

func DefaultStoreConfig() *StoreConfig

DefaultStoreConfig return a default *StoreConfig

func (*StoreConfig) SetEndpoints 

func (s *StoreConfig) SetEndpoints(endpoints string)

SetEndpoints sets endpoints to StoreConfig

func (StoreConfig) Validate 

func (s StoreConfig) Validate() error

Validate implements the validation.Validatable interface

type StoreType 

type StoreType = string

StoreType is the type of metastore

type Txn 

type Txn interface {
	// Do cache Ops in the Txn
	// Same op limit with KV Put/Get/Delete interface
	// Using snapshot isolation
	Do(ops ...Op) Txn

	// Commit tries to commit the transaction.
	// Any Op fail will cause entire txn rollback and return error
	Commit() (*TxnResponse, Error)
}

Txn doesn't support nested txn

type TxnResponse 

type TxnResponse struct {
	Header *ResponseHeader
	// Responses is a list of responses corresponding to the results from applying
	// success if succeeded is true or failure if succeeded is false.
	Responses []ResponseOp
}

TxnResponse .

func (*TxnResponse) OpResponse 

func (resp *TxnResponse) OpResponse() OpResponse

OpResponse generates a txn OpResponse from TxnResponse

Source Files

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