internal

package
v0.6.0 Latest Latest
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 Go to latest Published: Jul 19, 2021 License: Apache-2.0 Imports: 35 Imported by: 0

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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 (
	Persistent    GetTopicsOfNamespaceMode = "PERSISTENT"
	NonPersistent                          = "NON_PERSISTENT"
	All                                    = "ALL"
)
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/"
View Source 
const HTTPTopicUnderNamespaceV1 string = "/admin/namespaces/%s/destinations?mode=%s"
View Source 
const HTTPTopicUnderNamespaceV2 string = "/admin/v2/namespaces/%s/topics?mode=%s"

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.

View Source 
var (
	// ErrRequestTimeOut happens when request not finished in given requestTimeout.
	ErrRequestTimeOut = errors.New("request timed out")
)

Functions

func CloseIdleConnections added in v0.5.0 

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 added in v0.5.0 

func GetTopicRestPath(tn *TopicName) string

func IsV2Namespace added in v0.6.0 

func IsV2Namespace(namespace string) bool

func IsV2TopicName added in v0.5.0 

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 computes the delay before retrying an action. It uses an exponential backoff with jitter. The jitter represents up to 20 percents of the delay.

func (*Backoff) Next 

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

Next returns the delay to wait before next retry

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 added in v0.4.0 

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 added in v0.4.0 

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{}

	// CompareAndPoll compare the first item and poll it if meet the conditions
	CompareAndPoll(compare func(item interface{}) bool) 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 added in v0.2.0 

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 GetTopicsOfNamespaceMode added in v0.6.0 

type GetTopicsOfNamespaceMode string

GetTopicsOfNamespaceMode for CommandGetTopicsOfNamespace_Mode

type HTTPClient added in v0.5.0 

type HTTPClient interface {
	Get(endpoint string, obj interface{}, params map[string]string) error
	Closable
}

func NewHTTPClient added in v0.5.0 

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)

	// GetTopicsOfNamespace returns all the topics name for a given namespace.
	GetTopicsOfNamespace(namespace string, mode GetTopicsOfNamespaceMode) ([]string, error)

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

LookupService is a interface of lookup service.

func NewHTTPLookupService added in v0.5.0 

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 added in v0.4.0 

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 added in v0.4.0 

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

func (*Metrics) GetTopicMetrics added in v0.4.0 

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

type PartitionedTopicMetadata added in v0.5.0 

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 added in v0.5.0 

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

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

func NewPulsarServiceURIFromURIString added in v0.5.0 

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

func NewPulsarServiceURIFromURL added in v0.5.0 

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(ctx context.Context) bool

	// 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 added in v0.2.0 

func NewSemaphore(maxPermits int32) Semaphore

type ServiceNameResolver added in v0.5.0 

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 added in v0.5.0 

func NewPulsarServiceNameResolver(url *url.URL) ServiceNameResolver

type TLSOptions 

type TLSOptions struct {
	TrustCertsFilePath      string
	AllowInsecureConnection bool
	ValidateHostname        bool
}

type TopicMetrics added in v0.4.0 

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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