internal

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Published: May 19, 2021 License: Apache-2.0 Imports: 34 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)
)
View Source
const (
	BinaryService = "pulsar"
	HTTPService   = "http"
	HTTPSService  = "https"
	SSLService    = "ssl"
	BinaryPort    = 6650
	BinaryTLSPort = 6651
	HTTPPort      = 80
	HTTPSPort     = 443
)
View Source
const HTTPAdminServiceV1Format string = "/admin/%s/partitions"
View Source
const HTTPAdminServiceV2Format string = "/admin/v2/%s/partitions"
View Source
const HTTPLookupServiceBasePathV1 string = "/lookup/v2/destination/"
View Source
const HTTPLookupServiceBasePathV2 string = "/lookup/v2/topic/"

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 CloseIdleConnections

func CloseIdleConnections(c *http.Client)

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 GetTopicRestPath

func GetTopicRestPath(tn *TopicName) string

func IsV2TopicName

func IsV2TopicName(tn *TopicName) bool

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 interface {
	// IsFull check if the size in the current batch exceeds the maximum size allowed by the batch
	IsFull() bool

	// Add will add single message to batch.
	Add(
		metadata *pb.SingleMessageMetadata, sequenceIDGenerator *uint64,
		payload []byte,
		callback interface{}, replicateTo []string, deliverAt time.Time,
	) bool

	// Flush all the messages buffered in the client and wait until all messages have been successfully persisted.
	Flush() (batchData Buffer, sequenceID uint64, callbacks []interface{})

	// Flush all the messages buffered in multiple batches and wait until all
	// messages have been successfully persisted.
	FlushBatches() (
		batchData []Buffer, sequenceID []uint64, callbacks [][]interface{},
	)

	// Return the batch container batch message in multiple batches.
	IsMultiBatches() bool

	Close() error
	// contains filtered or unexported methods
}

BatchBuilder is a interface of batch builders

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 NewKeyBasedBatchBuilder

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

NewKeyBasedBatchBuilder init batch builder and return BatchBuilder pointer. Build a new key based batch message container.

type BatcherBuilderProvider

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

BatcherBuilderProvider defines func which returns the BatchBuilder.

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,
	metrics *Metrics) ConnectionPool

NewConnectionPool init connection pool.

type ConsumerHandler

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

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

type HTTPClient

type HTTPClient interface {
	Get(endpoint string, obj interface{}) error
	Closable
}

func NewHTTPClient

func NewHTTPClient(serviceURL *url.URL, serviceNameResolver ServiceNameResolver, tlsConfig *TLSOptions,
	requestTimeout time.Duration, logger log.Logger, metrics *Metrics,
	authProvider auth.Provider) (HTTPClient, error)

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)

	// GetPartitionedTopicMetadata perform a CommandPartitionedTopicMetadata request for
	// the given topic, returns the CommandPartitionedTopicMetadataResponse as the result.
	GetPartitionedTopicMetadata(topic string) (*PartitionedTopicMetadata, error)

	// Allow Lookup Service's internal client to be able to closed
	Closable
}

LookupService is a interface of lookup service.

func NewHTTPLookupService

func NewHTTPLookupService(httpClient HTTPClient, serviceURL *url.URL, serviceNameResolver ServiceNameResolver,
	tlsEnabled bool, logger log.Logger, metrics *Metrics) LookupService

NewHTTPLookupService init a http based lookup service struct and return an object of LookupService.

func NewLookupService

func NewLookupService(rpcClient RPCClient, serviceURL *url.URL, serviceNameResolver ServiceNameResolver,
	tlsEnabled bool, listenerName string, logger log.Logger, metrics *Metrics) 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 Metrics

type Metrics struct {

	// Metrics that are not labeled with topic, are immediately available
	ConnectionsOpened                     prometheus.Counter
	ConnectionsClosed                     prometheus.Counter
	ConnectionsEstablishmentErrors        prometheus.Counter
	ConnectionsHandshakeErrors            prometheus.Counter
	LookupRequestsCount                   prometheus.Counter
	PartitionedTopicMetadataRequestsCount prometheus.Counter
	RPCRequestCount                       prometheus.Counter
	// contains filtered or unexported fields
}

func NewMetricsProvider

func NewMetricsProvider(userDefinedLabels map[string]string) *Metrics

func (*Metrics) GetTopicMetrics

func (mp *Metrics) GetTopicMetrics(t string) *TopicMetrics

type PartitionedTopicMetadata

type PartitionedTopicMetadata struct {
	Partitions int `json:"partitions"` // Number of partitions for the topic
}

PartitionedTopicMetadata encapsulates a struct for metadata of a partitioned topic

type PulsarServiceURI

type PulsarServiceURI struct {
	ServiceName  string
	ServiceInfos []string
	ServiceHosts []string

	URL *url.URL
	// contains filtered or unexported fields
}

func NewPulsarServiceURIFromURIString

func NewPulsarServiceURIFromURIString(uri string) (*PulsarServiceURI, error)

func NewPulsarServiceURIFromURL

func NewPulsarServiceURIFromURL(url *url.URL) (*PulsarServiceURI, error)

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, serviceNameResolver ServiceNameResolver, pool ConnectionPool,
	requestTimeout time.Duration, logger log.Logger, metrics *Metrics) 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 ServiceNameResolver

type ServiceNameResolver interface {
	ResolveHost() (*url.URL, error)
	ResolveHostURI() (*PulsarServiceURI, error)
	UpdateServiceURL(url *url.URL) error
	GetServiceURI() *PulsarServiceURI
	GetServiceURL() *url.URL
	GetAddressList() []*url.URL
}

func NewPulsarServiceNameResolver

func NewPulsarServiceNameResolver(url *url.URL) ServiceNameResolver

type TLSOptions

type TLSOptions struct {
	TrustCertsFilePath      string
	AllowInsecureConnection bool
	ValidateHostname        bool
}

type TopicMetrics

type TopicMetrics struct {
	MessagesPublished        prometheus.Counter
	BytesPublished           prometheus.Counter
	MessagesPending          prometheus.Gauge
	BytesPending             prometheus.Gauge
	PublishErrorsTimeout     prometheus.Counter
	PublishErrorsMsgTooLarge prometheus.Counter
	PublishLatency           prometheus.Observer
	PublishRPCLatency        prometheus.Observer

	MessagesReceived   prometheus.Counter
	BytesReceived      prometheus.Counter
	PrefetchedMessages prometheus.Gauge
	PrefetchedBytes    prometheus.Gauge
	AcksCounter        prometheus.Counter
	NacksCounter       prometheus.Counter
	DlqCounter         prometheus.Counter
	ProcessingTime     prometheus.Observer

	ProducersOpened     prometheus.Counter
	ProducersClosed     prometheus.Counter
	ProducersPartitions prometheus.Gauge
	ConsumersOpened     prometheus.Counter
	ConsumersClosed     prometheus.Counter
	ConsumersPartitions prometheus.Gauge
	ReadersOpened       prometheus.Counter
	ReadersClosed       prometheus.Counter
}

type TopicName

type TopicName struct {
	Domain    string
	Tenant    string
	Namespace string
	Topic     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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