internal

package
v0.3.2 Latest Latest
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 Go to latest Published: Nov 9, 2020 License: Apache-2.0 Imports: 27 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	// MaxMessageSize limit message size for transfer
	MaxMessageSize = 5 * 1024 * 1024
	// MessageFramePadding is for metadata and other frame headers
	MessageFramePadding = 10 * 1024
	// MaxFrameSize limit the maximum size that pulsar allows for messages to be sent.
	MaxFrameSize = MaxMessageSize + MessageFramePadding
)
View Source 
const (
	// TODO: Find a better way to embed the version in the library code
	PulsarVersion       = "0.1"
	ClientVersionString = "Pulsar Go " + PulsarVersion

	PulsarProtocolVersion = int32(pb.ProtocolVersion_v13)
)

Variables

View Source 
var ErrConnectionClosed = errors.New("connection closed")
View Source 
var ErrCorruptedMessage = errors.New("corrupted message")

ErrCorruptedMessage is the error returned by ReadMessageData when it has detected corrupted data. The data is considered corrupted if it's missing a header, a checksum mismatch or there was an error when unmarshalling the message metadata.

View Source 
var ErrEOM = errors.New("EOF")

ErrEOM is the error returned by ReadMessage when no more input is available.

Functions

func ConvertFromStringMap 

func ConvertFromStringMap(m map[string]string) []*pb.KeyValue

ConvertFromStringMap convert a string map to a KeyValue []byte

func ConvertToStringMap 

func ConvertToStringMap(pbb []*pb.KeyValue) map[string]string

ConvertToStringMap convert a KeyValue []byte to string map

func Crc32cCheckSum 

func Crc32cCheckSum(data []byte) uint32

Crc32cCheckSum handles computing the checksum.

func GetAndAdd 

func GetAndAdd(n *uint64, diff uint64) uint64

GetAndAdd perform atomic read and update

func JavaStringHash 

func JavaStringHash(s string) uint32

JavaStringHash and Java String.hashCode() equivalent

func Murmur3_32Hash 

func Murmur3_32Hash(s string) uint32

Murmur3_32Hash use Murmur3 hashing function

func ParseRelativeTimeInSeconds 

func ParseRelativeTimeInSeconds(relativeTime string) (time.Duration, error)

func TimestampMillis 

func TimestampMillis(t time.Time) uint64

TimestampMillis return a time unix nano.

func TopicNameWithoutPartitionPart 

func TopicNameWithoutPartitionPart(tn *TopicName) string

Types

type Backoff 

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

Backoff

func (*Backoff) Next 

func (b *Backoff) Next() time.Duration

Next

type BatchBuilder 

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

BatchBuilder wraps the objects needed to build a batch.

func NewBatchBuilder 

func NewBatchBuilder(maxMessages uint, maxBatchSize uint, producerName string, producerID uint64,
	compressionType pb.CompressionType, level compression.Level,
	bufferPool BuffersPool, logger log.Logger) (*BatchBuilder, error)

NewBatchBuilder init batch builder and return BatchBuilder pointer. Build a new batch message container.

func (*BatchBuilder) Add 

func (bb *BatchBuilder) Add(metadata *pb.SingleMessageMetadata, sequenceID uint64, payload []byte,
	callback interface{}, replicateTo []string, deliverAt time.Time) bool

Add will add single message to batch.

func (*BatchBuilder) Close 

func (bb *BatchBuilder) Close() error

func (*BatchBuilder) Flush 

func (bb *BatchBuilder) Flush() (batchData Buffer, sequenceID uint64, callbacks []interface{})

Flush all the messages buffered in the client and wait until all messages have been successfully persisted.

func (*BatchBuilder) IsFull 

func (bb *BatchBuilder) IsFull() bool

IsFull check if the size in the current batch exceeds the maximum size allowed by the batch

type BlockingQueue 

type BlockingQueue interface {
	// Put enqueue one item, block if the queue is full
	Put(item interface{})

	// Take dequeue one item, block until it's available
	Take() interface{}

	// Poll dequeue one item, return nil if queue is empty
	Poll() interface{}

	// Peek return the first item without dequeing, return nil if queue is empty
	Peek() interface{}

	// PeekLast return last item in queue without dequeing, return nil if queue is empty
	PeekLast() interface{}

	// Size return the current size of the queue
	Size() int

	// ReadableSlice returns a new view of the readable items in the queue
	ReadableSlice() []interface{}
}

BlockingQueue is a interface of block queue

func NewBlockingQueue 

func NewBlockingQueue(maxSize int) BlockingQueue

NewBlockingQueue init block queue and returns a BlockingQueue

type Buffer 

type Buffer interface {
	ReadableBytes() uint32

	WritableBytes() uint32

	// Capacity returns the capacity of the buffer's underlying byte slice,
	// that is, the total space allocated for the buffer's data.
	Capacity() uint32

	IsWritable() bool

	Read(size uint32) []byte

	Get(readerIndex uint32, size uint32) []byte

	ReadableSlice() []byte

	WritableSlice() []byte

	// WrittenBytes advance the writer index when data was written in a slice
	WrittenBytes(size uint32)

	// MoveToFront copy the available portion of data at the beginning of the buffer
	MoveToFront()

	ReadUint16() uint16
	ReadUint32() uint32

	WriteUint16(n uint16)
	WriteUint32(n uint32)

	WriterIndex() uint32
	ReaderIndex() uint32

	Write(s []byte)

	Put(writerIdx uint32, s []byte)
	PutUint32(n uint32, writerIdx uint32)

	Resize(newSize uint32)
	ResizeIfNeeded(spaceNeeded uint32)

	// Clear will clear the current buffer data.
	Clear()
}

Buffer is a variable-sized buffer of bytes with Read and Write methods. The zero value for Buffer is an empty buffer ready to use.

func NewBuffer 

func NewBuffer(size int) Buffer

NewBuffer creates and initializes a new Buffer using buf as its initial contents.

func NewBufferWrapper 

func NewBufferWrapper(buf []byte) Buffer

type BuffersPool 

type BuffersPool interface {
	GetBuffer() Buffer
}

type CheckSum 

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

func (*CheckSum) Write 

func (cs *CheckSum) Write(p []byte) (int, error)

type ClientHandlers 

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

ClientHandlerMap is a simple concurrent-safe map for the client type

func NewClientHandlers 

func NewClientHandlers() ClientHandlers

func (*ClientHandlers) Add 

func (h *ClientHandlers) Add(c Closable)

func (*ClientHandlers) Close 

func (h *ClientHandlers) Close()

func (*ClientHandlers) Del 

func (h *ClientHandlers) Del(c Closable)

func (*ClientHandlers) Val 

func (h *ClientHandlers) Val(c Closable) bool

type Closable 

type Closable interface {
	Close()
}

type Connection 

type Connection interface {
	SendRequest(requestID uint64, req *pb.BaseCommand, callback func(*pb.BaseCommand, error))
	SendRequestNoWait(req *pb.BaseCommand) error
	WriteData(data Buffer)
	RegisterListener(id uint64, listener ConnectionListener)
	UnregisterListener(id uint64)
	AddConsumeHandler(id uint64, handler ConsumerHandler)
	DeleteConsumeHandler(id uint64)
	ID() string
	GetMaxMessageSize() int32
	Close()
}

Connection is a interface of client cnx.

type ConnectionListener 

type ConnectionListener interface {
	// ReceivedSendReceipt receive and process the return value of the send command.
	ReceivedSendReceipt(response *pb.CommandSendReceipt)

	// ConnectionClosed close the TCP connection.
	ConnectionClosed()
}

ConnectionListener is a user of a connection (eg. a producer or a consumer) that can register itself to get notified when the connection is closed.

type ConnectionPool 

type ConnectionPool interface {
	// GetConnection get a connection from ConnectionPool.
	GetConnection(logicalAddr *url.URL, physicalAddr *url.URL) (Connection, error)

	// Close all the connections in the pool
	Close()
}

ConnectionPool is a interface of connection pool.

func NewConnectionPool 

func NewConnectionPool(
	tlsOptions *TLSOptions,
	auth auth.Provider,
	connectionTimeout time.Duration,
	maxConnectionsPerHost int,
	logger log.Logger) ConnectionPool

NewConnectionPool init connection pool.

type ConsumerHandler 

type ConsumerHandler interface {
	MessageReceived(response *pb.CommandMessage, headersAndPayload Buffer) error

	// ConnectionClosed close the TCP connection.
	ConnectionClosed()
}

type LookupResult 

type LookupResult struct {
	LogicalAddr  *url.URL
	PhysicalAddr *url.URL
}

LookupResult encapsulates a struct for lookup a request, containing two parts: LogicalAddr, PhysicalAddr.

type LookupService 

type LookupService interface {
	// Lookup perform a lookup for the given topic, confirm the location of the broker
	// where the topic is located, and return the LookupResult.
	Lookup(topic string) (*LookupResult, error)
}

LookupService is a interface of lookup service.

func NewLookupService 

func NewLookupService(rpcClient RPCClient, serviceURL *url.URL,
	tlsEnabled bool, logger log.Logger) LookupService

NewLookupService init a lookup service struct and return an object of LookupService.

type MessageReader 

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

MessageReader provides helper methods to parse the metadata and messages from the binary format Wire format for a messages

Old format (single message) [MAGIC_NUMBER][CHECKSUM] [METADATA_SIZE][METADATA] [PAYLOAD]

Batch format [MAGIC_NUMBER][CHECKSUM] [METADATA_SIZE][METADATA] [METADATA_SIZE][METADATA][PAYLOAD] [METADATA_SIZE][METADATA][PAYLOAD]

func NewMessageReader 

func NewMessageReader(headersAndPayload Buffer) *MessageReader

func NewMessageReaderFromArray 

func NewMessageReaderFromArray(headersAndPayload []byte) *MessageReader

func (*MessageReader) ReadMessage 

func (r *MessageReader) ReadMessage() (*pb.SingleMessageMetadata, []byte, error)

func (*MessageReader) ReadMessageMetadata 

func (r *MessageReader) ReadMessageMetadata() (*pb.MessageMetadata, error)

func (*MessageReader) ResetBuffer 

func (r *MessageReader) ResetBuffer(buffer Buffer)

type RPCClient 

type RPCClient interface {
	// Create a new unique request id
	NewRequestID() uint64

	NewProducerID() uint64

	NewConsumerID() uint64

	// Send a request and block until the result is available
	RequestToAnyBroker(requestID uint64, cmdType pb.BaseCommand_Type, message proto.Message) (*RPCResult, error)

	Request(logicalAddr *url.URL, physicalAddr *url.URL, requestID uint64,
		cmdType pb.BaseCommand_Type, message proto.Message) (*RPCResult, error)

	RequestOnCnxNoWait(cnx Connection, cmdType pb.BaseCommand_Type, message proto.Message) error

	RequestOnCnx(cnx Connection, requestID uint64, cmdType pb.BaseCommand_Type, message proto.Message) (*RPCResult, error)
}

func NewRPCClient 

func NewRPCClient(serviceURL *url.URL, pool ConnectionPool,
	requestTimeout time.Duration, logger log.Logger) RPCClient

type RPCResult 

type RPCResult struct {
	Response *pb.BaseCommand
	Cnx      Connection
}

type Semaphore 

type Semaphore interface {
	// Acquire a permit, if one is available and returns immediately,
	// reducing the number of available permits by one.
	Acquire()

	// Try to acquire a permit. The method will return immediately
	// with a `true` if it was possible to acquire a permit and
	// `false` otherwise.
	TryAcquire() bool

	// Release a permit, returning it to the semaphore.
	// Release a permit, increasing the number of available permits by
	// one.  If any threads are trying to acquire a permit, then one is
	// selected and given the permit that was just released.  That thread
	// is (re)enabled for thread scheduling purposes.
	// There is no requirement that a thread that releases a permit must
	// have acquired that permit by calling Acquire().
	// Correct usage of a semaphore is established by programming convention
	// in the application.
	Release()
}

func NewSemaphore 

func NewSemaphore(maxPermits int32) Semaphore

type TLSOptions 

type TLSOptions struct {
	TrustCertsFilePath      string
	AllowInsecureConnection bool
	ValidateHostname        bool
}

type TopicName 

type TopicName struct {
	Domain    string
	Namespace string
	Name      string
	Partition int
}

TopicName abstract a struct contained in a Topic

func ParseTopicName 

func ParseTopicName(topic string) (*TopicName, error)

ParseTopicName parse the given topic name and return TopicName.

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