amqp

package
v1.0.2 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Jul 5, 2022 License: MIT, MIT Imports: 19 Imported by: 0

Documentation

Overview

Copyright (C) 2017 Kale Blankenship Portions Copyright (c) Microsoft Corporation

Copyright (C) 2017 Kale Blankenship Portions Copyright (c) Microsoft Corporation

Copyright (C) 2017 Kale Blankenship Portions Copyright (c) Microsoft Corporation

Copyright (C) 2017 Kale Blankenship Portions Copyright (c) Microsoft Corporation

Copyright (C) 2017 Kale Blankenship Portions Copyright (c) Microsoft Corporation

Copyright (C) 2017 Kale Blankenship Portions Copyright (c) Microsoft Corporation

Copyright (C) 2017 Kale Blankenship Portions Copyright (c) Microsoft Corporation

Copyright (C) 2017 Kale Blankenship Portions Copyright (c) Microsoft Corporation

Copyright (c) Microsoft Corporation

Copyright (C) 2017 Kale Blankenship Portions Copyright (c) Microsoft Corporation

Copyright (C) 2017 Kale Blankenship Portions Copyright (c) Microsoft Corporation

Copyright (C) 2017 Kale Blankenship Portions Copyright (c) Microsoft Corporation

Copyright (C) 2017 Kale Blankenship Portions Copyright (c) Microsoft Corporation

Copyright (C) 2017 Kale Blankenship Portions Copyright (c) Microsoft Corporation

Index

Constants

View Source 
const (
	DefaultMaxLinks = 4294967296
	DefaultWindow   = 1000
)

Default session options

View Source 
const (
	DefaultIdleTimeout  = 1 * time.Minute
	DefaultMaxFrameSize = 65536
	DefaultMaxSessions  = 65536
)

Default connection options

View Source 
const (
	// Sender will send all deliveries initially unsettled to the receiver.
	ModeUnsettled = encoding.ModeUnsettled

	// Sender will send all deliveries settled to the receiver.
	ModeSettled = encoding.ModeSettled

	// Sender MAY send a mixture of settled and unsettled deliveries to the receiver.
	ModeMixed = encoding.ModeMixed
)

Sender Settlement Modes

View Source 
const (
	// Receiver will spontaneously settle all incoming transfers.
	ModeFirst = encoding.ModeFirst

	// Receiver will only settle after sending the disposition to the
	// sender and receiving a disposition indicating settlement of
	// the delivery from the sender.
	ModeSecond = encoding.ModeSecond
)

Receiver Settlement Modes

View Source 
const (
	// No terminus state is retained durably.
	DurabilityNone = encoding.DurabilityNone

	// Only the existence and configuration of the terminus is
	// retained durably.
	DurabilityConfiguration = encoding.DurabilityConfiguration

	// In addition to the existence and configuration of the
	// terminus, the unsettled state for durable messages is
	// retained durably.
	DurabilityUnsettledState = encoding.DurabilityUnsettledState
)

Durability Policies

View Source 
const (
	// The expiry timer starts when terminus is detached.
	ExpiryLinkDetach = encoding.ExpiryLinkDetach

	// The expiry timer starts when the most recently
	// associated session is ended.
	ExpirySessionEnd = encoding.ExpirySessionEnd

	// The expiry timer starts when most recently associated
	// connection is closed.
	ExpiryConnectionClose = encoding.ExpiryConnectionClose

	// The terminus never expires.
	ExpiryNever = encoding.ExpiryNever
)

Expiry Policies

View Source 
const (
	DefaultLinkCredit      = 1
	DefaultLinkBatching    = false
	DefaultLinkBatchMaxAge = 5 * time.Second
)

Default link options

Variables

View Source 
var (
	ErrTimeout = errors.New("amqp: timeout waiting for response")

	// ErrConnClosed is propagated to Session and Senders/Receivers
	// when Client.Close() is called or the server closes the connection
	// without specifying an error.
	ErrConnClosed = errors.New("amqp: connection closed")

	// ErrSessionClosed is propagated to Sender/Receivers
	// when Session.Close() is called.
	ErrSessionClosed = errors.New("amqp: session closed")

	// ErrLinkClosed is returned by send and receive operations when
	// Sender.Close() or Receiver.Close() are called.
	ErrLinkClosed = errors.New("amqp: link closed")
)

Errors

Functions

This section is empty.

Types

type AMQPAddress 

type AMQPAddress = string

AMQPAddress corresponds to the 'address' type in the AMQP spec. <type name="address-string" class="restricted" source="string" provides="address"/>

type AMQPBinary 

type AMQPBinary = []byte

AMQPBinary corresponds to the `binary` type in the AMQP spec.

type AMQPMessageID 

type AMQPMessageID = interface{}

AMQPMessageID corresponds to the 'message-id' type in the AMQP spec. Internally it can be one of the following: - uint64: <type name="message-id-ulong" class="restricted" source="ulong" provides="message-id"/> - amqp.UUID: <type name="message-id-uuid" class="restricted" source="uuid" provides="message-id"/> - []byte: <type name="message-id-binary" class="restricted" source="binary" provides="message-id"/> - string: <type name="message-id-string" class="restricted" source="string" provides="message-id"/>

type AMQPSequenceNumber 

type AMQPSequenceNumber = uint32

AMQPSequenceNumber corresponds to the `sequence-no` type in the AMQP spec. <type name="sequence-no" class="restricted" source="uint"/>

type AMQPSymbol 

type AMQPSymbol = string

AMQPSymbol corresponds to the 'symbol' type in the AMQP spec. <type name="symbol" class="primitive"/> And either: - variable-width, 1 byte size up to 2^8 - 1 seven bit ASCII characters representing a symbolic value - variable-width, 4 byte size up to 2^32 - 1 seven bit ASCII characters representing a symbolic value

type Annotations 

type Annotations = encoding.Annotations

Annotations keys must be of type string, int, or int64.

String keys are encoded as AMQP Symbols.

type Client 

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

Client is an AMQP client connection.

func Dial 

func Dial(addr string, opts ...ConnOption) (*Client, error)

Dial connects to an AMQP server.

If the addr includes a scheme, it must be "amqp", "amqps", or "amqp+ssl". If no port is provided, 5672 will be used for "amqp" and 5671 for "amqps" or "amqp+ssl".

If username and password information is not empty it's used as SASL PLAIN credentials, equal to passing ConnSASLPlain option.

func New 

func New(conn net.Conn, opts ...ConnOption) (*Client, error)

New establishes an AMQP client connection over conn.

func (*Client) Close 

func (c *Client) Close() error

Close disconnects the connection.

func (*Client) NewSession 

func (c *Client) NewSession(opts ...SessionOption) (*Session, error)

NewSession opens a new AMQP session to the server. Returns ErrConnClosed if the underlying connection has been closed.

type ConnOption 

type ConnOption func(*conn) error

ConnOption is a function for configuring an AMQP connection.

func ConnConnectTimeout 

func ConnConnectTimeout(d time.Duration) ConnOption

ConnConnectTimeout configures how long to wait for the server during connection establishment.

Once the connection has been established, ConnIdleTimeout applies. If duration is zero, no timeout will be applied.

Default: 0.

func ConnContainerID 

func ConnContainerID(id string) ConnOption

ConnContainerID sets the container-id to use when opening the connection.

A container ID will be randomly generated if this option is not used.

func ConnIdleTimeout 

func ConnIdleTimeout(d time.Duration) ConnOption

ConnIdleTimeout specifies the maximum period between receiving frames from the peer.

Resolution is milliseconds. A value of zero indicates no timeout. This setting is in addition to TCP keepalives.

Default: 1 minute.

func ConnMaxFrameSize 

func ConnMaxFrameSize(n uint32) ConnOption

ConnMaxFrameSize sets the maximum frame size that the connection will accept.

Must be 512 or greater.

Default: 512.

func ConnMaxSessions 

func ConnMaxSessions(n int) ConnOption

ConnMaxSessions sets the maximum number of channels.

n must be in the range 1 to 65536.

Default: 65536.

func ConnProperty 

func ConnProperty(key, value string) ConnOption

ConnProperty sets an entry in the connection properties map sent to the server.

This option can be used multiple times.

func ConnSASLAnonymous 

func ConnSASLAnonymous() ConnOption

ConnSASLAnonymous enables SASL ANONYMOUS authentication for the connection.

func ConnSASLExternal 

func ConnSASLExternal(resp string) ConnOption

ConnSASLExternal enables SASL EXTERNAL authentication for the connection. The value for resp is dependent on the type of authentication (empty string is common for TLS). See https://datatracker.ietf.org/doc/html/rfc4422#appendix-A for additional info.

func ConnSASLPlain 

func ConnSASLPlain(username, password string) ConnOption

ConnSASLPlain enables SASL PLAIN authentication for the connection.

SASL PLAIN transmits credentials in plain text and should only be used on TLS/SSL enabled connection.

func ConnSASLXOAUTH2 

func ConnSASLXOAUTH2(username, bearer string, saslMaxFrameSizeOverride uint32) ConnOption

ConnSASLXOAUTH2 enables SASL XOAUTH2 authentication for the connection.

The saslMaxFrameSizeOverride parameter allows the limit that governs the maximum frame size this client will allow itself to generate to be raised for the sasl-init frame only. Set this when the size of the size of the SASL XOAUTH2 initial client response (which contains the username and bearer token) would otherwise breach the 512 byte min-max-frame-size (http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-transport-v1.0-os.html#definition-MIN-MAX-FRAME-SIZE). Pass -1 to keep the default.

SASL XOAUTH2 transmits the bearer in plain text and should only be used on TLS/SSL enabled connection.

func ConnServerHostname 

func ConnServerHostname(hostname string) ConnOption

ConnServerHostname sets the hostname sent in the AMQP Open frame and TLS ServerName (if not otherwise set).

This is useful when the AMQP connection will be established via a pre-established TLS connection as the server may not know which hostname the client is attempting to connect to.

func ConnTLS 

func ConnTLS(enable bool) ConnOption

ConnTLS toggles TLS negotiation.

Default: false.

func ConnTLSConfig 

func ConnTLSConfig(tc *tls.Config) ConnOption

ConnTLSConfig sets the tls.Config to be used during TLS negotiation.

This option is for advanced usage, in most scenarios providing a URL scheme of "amqps://" or ConnTLS(true) is sufficient.

type DetachError 

type DetachError struct {
	RemoteError *Error
}

DetachError is returned by a link (Receiver/Sender) when a detach frame is received.

RemoteError will be nil if the link was detached gracefully.

func (*DetachError) Error 

func (e *DetachError) Error() string

type Durability 

type Durability = encoding.Durability

Durability specifies the durability of a link.

type Error 

type Error = encoding.Error

type ErrorCondition 

type ErrorCondition = encoding.ErrorCondition
const (
	// AMQP Errors
	ErrorInternalError         ErrorCondition = "amqp:internal-error"
	ErrorNotFound              ErrorCondition = "amqp:not-found"
	ErrorUnauthorizedAccess    ErrorCondition = "amqp:unauthorized-access"
	ErrorDecodeError           ErrorCondition = "amqp:decode-error"
	ErrorResourceLimitExceeded ErrorCondition = "amqp:resource-limit-exceeded"
	ErrorNotAllowed            ErrorCondition = "amqp:not-allowed"
	ErrorInvalidField          ErrorCondition = "amqp:invalid-field"
	ErrorNotImplemented        ErrorCondition = "amqp:not-implemented"
	ErrorResourceLocked        ErrorCondition = "amqp:resource-locked"
	ErrorPreconditionFailed    ErrorCondition = "amqp:precondition-failed"
	ErrorResourceDeleted       ErrorCondition = "amqp:resource-deleted"
	ErrorIllegalState          ErrorCondition = "amqp:illegal-state"
	ErrorFrameSizeTooSmall     ErrorCondition = "amqp:frame-size-too-small"

	// Connection Errors
	ErrorConnectionForced   ErrorCondition = "amqp:connection:forced"
	ErrorFramingError       ErrorCondition = "amqp:connection:framing-error"
	ErrorConnectionRedirect ErrorCondition = "amqp:connection:redirect"

	// Session Errors
	ErrorWindowViolation  ErrorCondition = "amqp:session:window-violation"
	ErrorErrantLink       ErrorCondition = "amqp:session:errant-link"
	ErrorHandleInUse      ErrorCondition = "amqp:session:handle-in-use"
	ErrorUnattachedHandle ErrorCondition = "amqp:session:unattached-handle"

	// Link Errors
	ErrorDetachForced          ErrorCondition = "amqp:link:detach-forced"
	ErrorTransferLimitExceeded ErrorCondition = "amqp:link:transfer-limit-exceeded"
	ErrorMessageSizeExceeded   ErrorCondition = "amqp:link:message-size-exceeded"
	ErrorLinkRedirect          ErrorCondition = "amqp:link:redirect"
	ErrorStolen                ErrorCondition = "amqp:link:stolen"
)

Error Conditions

type ExpiryPolicy 

type ExpiryPolicy = encoding.ExpiryPolicy

ExpiryPolicy specifies when the expiry timer of a terminus starts counting down from the timeout value.

If the link is subsequently re-attached before the terminus is expired, then the count down is aborted. If the conditions for the terminus-expiry-policy are subsequently re-met, the expiry timer restarts from its originally configured timeout value.

type LinkOption 

type LinkOption func(*link) error

LinkOption is a function for configuring an AMQP link.

A link may be a Sender or a Receiver.

func LinkAddressDynamic 

func LinkAddressDynamic() LinkOption

LinkAddressDynamic requests a dynamically created address from the server.

func LinkBatchMaxAge 

func LinkBatchMaxAge(d time.Duration) LinkOption

LinkBatchMaxAge sets the maximum time between the start of a disposition batch and sending the batch to the server.

func LinkBatching 

func LinkBatching(enable bool) LinkOption

LinkBatching toggles batching of message disposition.

When enabled, accepting a message does not send the disposition to the server until the batch is equal to link credit or the batch max age expires.

func LinkCredit 

func LinkCredit(credit uint32) LinkOption

LinkCredit specifies the maximum number of unacknowledged messages the sender can transmit.

func LinkDetachOnDispositionError 

func LinkDetachOnDispositionError(detachOnDispositionError bool) LinkOption

LinkDetachOnDispositionError controls whether you detach on disposition errors (subject to some simple logic) or do NOT detach at all on disposition errors. Defaults to true.

func LinkMaxMessageSize 

func LinkMaxMessageSize(size uint64) LinkOption

LinkMaxMessageSize sets the maximum message size that can be sent or received on the link.

A size of zero indicates no limit.

Default: 0.

func LinkName 

func LinkName(name string) LinkOption

LinkName sets the name of the link.

The link names must be unique per-connection and direction.

Default: randomly generated.

func LinkProperty 

func LinkProperty(key, value string) LinkOption

LinkProperty sets an entry in the link properties map sent to the server.

This option can be used multiple times.

func LinkPropertyInt32 

func LinkPropertyInt32(key string, value int32) LinkOption

LinkPropertyInt32 sets an entry in the link properties map sent to the server.

This option can be set multiple times.

func LinkPropertyInt64 

func LinkPropertyInt64(key string, value int64) LinkOption

LinkPropertyInt64 sets an entry in the link properties map sent to the server.

This option can be used multiple times.

func LinkReceiverSettle 

func LinkReceiverSettle(mode ReceiverSettleMode) LinkOption

LinkReceiverSettle sets the requested receiver settlement mode.

If a settlement mode is explicitly set and the server does not honor it an error will be returned during link attachment.

Default: Accept the settlement mode set by the server, commonly ModeFirst.

func LinkSelectorFilter 

func LinkSelectorFilter(filter string) LinkOption

LinkSelectorFilter sets a selector filter (apache.org:selector-filter:string) on the link source.

func LinkSenderSettle 

func LinkSenderSettle(mode SenderSettleMode) LinkOption

LinkSenderSettle sets the requested sender settlement mode.

If a settlement mode is explicitly set and the server does not honor it an error will be returned during link attachment.

Default: Accept the settlement mode set by the server, commonly ModeMixed.

func LinkSourceAddress 

func LinkSourceAddress(addr string) LinkOption

LinkSourceAddress sets the source address.

func LinkSourceCapabilities 

func LinkSourceCapabilities(capabilities ...string) LinkOption

LinkSourceCapabilities sets the source capabilities.

func LinkSourceDurability 

func LinkSourceDurability(d Durability) LinkOption

LinkSourceDurability sets the source durability policy.

Default: DurabilityNone.

func LinkSourceExpiryPolicy 

func LinkSourceExpiryPolicy(p ExpiryPolicy) LinkOption

LinkSourceExpiryPolicy sets the link expiration policy.

Default: ExpirySessionEnd.

func LinkSourceFilter 

func LinkSourceFilter(name string, code uint64, value interface{}) LinkOption

LinkSourceFilter is an advanced API for setting non-standard source filters. Please file an issue or open a PR if a standard filter is missing from this library.

The name is the key for the filter map. It will be encoded as an AMQP symbol type.

The code is the descriptor of the described type value. The domain-id and descriptor-id should be concatenated together. If 0 is passed as the code, the name will be used as the descriptor.

The value is the value of the descriped types. Acceptable types for value are specific to the filter.

Example:

The standard selector-filter is defined as: 

<descriptor name="apache.org:selector-filter:string" code="0x0000468C:0x00000004"/>

In this case the name is "apache.org:selector-filter:string" and the code is 0x0000468C00000004. 

LinkSourceFilter("apache.org:selector-filter:string", 0x0000468C00000004, exampleValue)

References: 

http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-messaging-v1.0-os.html#type-filter-set
http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-types-v1.0-os.html#section-descriptor-values

func LinkSourceTimeout 

func LinkSourceTimeout(timeout uint32) LinkOption

LinkSourceTimeout sets the duration that an expiring source will be retained.

Default: 0.

func LinkTargetAddress 

func LinkTargetAddress(addr string) LinkOption

LinkTargetAddress sets the target address.

func LinkTargetDurability 

func LinkTargetDurability(d Durability) LinkOption

LinkTargetDurability sets the target durability policy.

Default: DurabilityNone.

func LinkTargetExpiryPolicy 

func LinkTargetExpiryPolicy(p ExpiryPolicy) LinkOption

LinkTargetExpiryPolicy sets the link expiration policy.

Default: ExpirySessionEnd.

func LinkTargetTimeout 

func LinkTargetTimeout(timeout uint32) LinkOption

LinkTargetTimeout sets the duration that an expiring target will be retained.

Default: 0.

func LinkWithManualCredits 

func LinkWithManualCredits() LinkOption

LinkWithManualCredits enables manual credit management for this link. Credits can be added with IssueCredit(), and links can also be drained with DrainCredit().

type Message 

type Message struct {
	// Message format code.
	//
	// The upper three octets of a message format code identify a particular message
	// format. The lowest octet indicates the version of said message format. Any
	// given version of a format is forwards compatible with all higher versions.
	Format uint32

	// The DeliveryTag can be up to 32 octets of binary data.
	// Note that when mode one is enabled there will be no delivery tag.
	DeliveryTag []byte

	// The header section carries standard delivery details about the transfer
	// of a message through the AMQP network.
	Header *MessageHeader

	// The delivery-annotations section is used for delivery-specific non-standard
	// properties at the head of the message. Delivery annotations convey information
	// from the sending peer to the receiving peer.
	DeliveryAnnotations encoding.Annotations

	// The message-annotations section is used for properties of the message which
	// are aimed at the infrastructure.
	Annotations encoding.Annotations

	// The properties section is used for a defined set of standard properties of
	// the message.
	Properties *MessageProperties

	// The application-properties section is a part of the bare message used for
	// structured application data. Intermediaries can use the data within this
	// structure for the purposes of filtering or routing.
	ApplicationProperties map[string]interface{}

	// Data payloads.
	// A data section contains opaque binary data.
	Data [][]byte

	// Value payload.
	// An amqp-value section contains a single AMQP value.
	Value interface{}

	// Sequence will contain AMQP sequence sections from the body of the message.
	// An amqp-sequence section contains an AMQP sequence.
	Sequence [][]interface{}

	// The footer section is used for details about the message or delivery which
	// can only be calculated or evaluated once the whole bare message has been
	// constructed or seen (for example message hashes, HMACs, signatures and
	// encryption details).
	Footer encoding.Annotations

	// Mark the message as settled when LinkSenderSettle is ModeMixed.
	//
	// This field is ignored when LinkSenderSettle is not ModeMixed.
	SendSettled bool
	// contains filtered or unexported fields
}

Message is an AMQP message.

func NewMessage 

func NewMessage(data []byte) *Message

NewMessage returns a *Message with data as the payload.

This constructor is intended as a helper for basic Messages with a single data payload. It is valid to construct a Message directly for more complex usages.

func (*Message) GetData 

func (m *Message) GetData() []byte

GetData returns the first []byte from the Data field or nil if Data is empty.

func (*Message) LinkName 

func (m *Message) LinkName() string

LinkName returns the receiving link name or the empty string.

func (*Message) Marshal 

func (m *Message) Marshal(wr *buffer.Buffer) error

func (*Message) MarshalBinary 

func (m *Message) MarshalBinary() ([]byte, error)

MarshalBinary encodes the message into binary form.

func (*Message) Unmarshal 

func (m *Message) Unmarshal(r *buffer.Buffer) error

func (*Message) UnmarshalBinary 

func (m *Message) UnmarshalBinary(data []byte) error

UnmarshalBinary decodes the message from binary form.

type MessageHeader 

type MessageHeader struct {
	Durable       bool
	Priority      uint8
	TTL           time.Duration // from milliseconds
	FirstAcquirer bool
	DeliveryCount uint32
}

MessageHeader carries standard delivery details about the transfer of a message.

func (*MessageHeader) Marshal 

func (h *MessageHeader) Marshal(wr *buffer.Buffer) error

func (*MessageHeader) Unmarshal 

func (h *MessageHeader) Unmarshal(r *buffer.Buffer) error

type MessageProperties 

type MessageProperties struct {
	// Message-id, if set, uniquely identifies a message within the message system.
	// The message producer is usually responsible for setting the message-id in
	// such a way that it is assured to be globally unique. A broker MAY discard a
	// message as a duplicate if the value of the message-id matches that of a
	// previously received message sent to the same node.
	MessageID AMQPMessageID // uint64, UUID, []byte, or string

	// The identity of the user responsible for producing the message.
	// The client sets this value, and it MAY be authenticated by intermediaries.
	UserID AMQPBinary

	// The to field identifies the node that is the intended destination of the message.
	// On any given transfer this might not be the node at the receiving end of the link.
	To *AMQPAddress

	// A common field for summary information about the message content and purpose.
	Subject *string

	// The address of the node to send replies to.
	ReplyTo *AMQPAddress

	// This is a client-specific id that can be used to mark or identify messages
	// between clients.
	CorrelationID AMQPMessageID // uint64, UUID, []byte, or string

	// The RFC-2046 [RFC2046] MIME type for the message's application-data section
	// (body). As per RFC-2046 [RFC2046] this can contain a charset parameter defining
	// the character encoding used: e.g., 'text/plain; charset="utf-8"'.
	//
	// For clarity, as per section 7.2.1 of RFC-2616 [RFC2616], where the content type
	// is unknown the content-type SHOULD NOT be set. This allows the recipient the
	// opportunity to determine the actual type. Where the section is known to be truly
	// opaque binary data, the content-type SHOULD be set to application/octet-stream.
	//
	// When using an application-data section with a section code other than data,
	// content-type SHOULD NOT be set.
	ContentType *AMQPSymbol

	// The content-encoding property is used as a modifier to the content-type.
	// When present, its value indicates what additional content encodings have been
	// applied to the application-data, and thus what decoding mechanisms need to be
	// applied in order to obtain the media-type referenced by the content-type header
	// field.
	//
	// Content-encoding is primarily used to allow a document to be compressed without
	// losing the identity of its underlying content type.
	//
	// Content-encodings are to be interpreted as per section 3.5 of RFC 2616 [RFC2616].
	// Valid content-encodings are registered at IANA [IANAHTTPPARAMS].
	//
	// The content-encoding MUST NOT be set when the application-data section is other
	// than data. The binary representation of all other application-data section types
	// is defined completely in terms of the AMQP type system.
	//
	// Implementations MUST NOT use the identity encoding. Instead, implementations
	// SHOULD NOT set this property. Implementations SHOULD NOT use the compress encoding,
	// except as to remain compatible with messages originally sent with other protocols,
	// e.g. HTTP or SMTP.
	//
	// Implementations SHOULD NOT specify multiple content-encoding values except as to
	// be compatible with messages originally sent with other protocols, e.g. HTTP or SMTP.
	ContentEncoding *AMQPSymbol

	// An absolute time when this message is considered to be expired.
	AbsoluteExpiryTime *time.Time

	// An absolute time when this message was created.
	CreationTime *time.Time

	// Identifies the group the message belongs to.
	GroupID *string

	// The relative position of this message within its group.
	GroupSequence *AMQPSequenceNumber // RFC-1982 sequence number

	// This is a client-specific id that is used so that client can send replies to this
	// message to a specific group.
	ReplyToGroupID *string
}

MessageProperties is the defined set of properties for AMQP messages.

func (*MessageProperties) Marshal 

func (p *MessageProperties) Marshal(wr *buffer.Buffer) error

func (*MessageProperties) Unmarshal 

func (p *MessageProperties) Unmarshal(r *buffer.Buffer) error

type Receiver 

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

Receiver receives messages on a single AMQP link.

func (*Receiver) AcceptMessage 

func (r *Receiver) AcceptMessage(ctx context.Context, msg *Message) error

Accept notifies the server that the message has been accepted and does not require redelivery.

func (*Receiver) Address 

func (r *Receiver) Address() string

Address returns the link's address.

func (*Receiver) Close 

func (r *Receiver) Close(ctx context.Context) error

Close closes the Receiver and AMQP link.

If ctx expires while waiting for servers response, ctx.Err() will be returned. The session will continue to wait for the response until the Session or Client is closed.

func (*Receiver) DrainCredit 

func (r *Receiver) DrainCredit(ctx context.Context) error

DrainCredit sets the drain flag on the next flow frame and waits for the drain to be acknowledged.

func (*Receiver) IssueCredit 

func (r *Receiver) IssueCredit(credit uint32) error

IssueCredit adds credits to be requested in the next flow request.

func (*Receiver) LinkName 

func (r *Receiver) LinkName() string

LinkName returns associated link name or an empty string if link is not defined.

func (*Receiver) LinkSourceFilterValue 

func (r *Receiver) LinkSourceFilterValue(name string) interface{}

LinkSourceFilterValue retrieves the specified link source filter value or nil if it doesn't exist.

func (*Receiver) ModifyMessage 

func (r *Receiver) ModifyMessage(ctx context.Context, msg *Message, deliveryFailed, undeliverableHere bool, messageAnnotations Annotations) error

Modify notifies the server that the message was not acted upon and should be modifed.

deliveryFailed indicates that the server must consider this and unsuccessful delivery attempt and increment the delivery count.

undeliverableHere indicates that the server must not redeliver the message to this link.

messageAnnotations is an optional annotation map to be merged with the existing message annotations, overwriting existing keys if necessary.

func (*Receiver) Prefetched 

func (r *Receiver) Prefetched(ctx context.Context) (*Message, error)

Prefetched returns the next message that is stored in the Receiver's prefetch cache. It does NOT wait for the remote sender to send messages and returns immediately if the prefetch cache is empty. To receive from the prefetch and wait for messages from the remote Sender use `Receive`.

When using ModeSecond, you *must* take an action on the message by calling one of the following: AcceptMessage, RejectMessage, ReleaseMessage, ModifyMessage. When using ModeFirst, the message is spontaneously Accepted at reception.

func (*Receiver) Receive 

func (r *Receiver) Receive(ctx context.Context) (*Message, error)

Receive returns the next message from the sender.

Blocks until a message is received, ctx completes, or an error occurs. When using ModeSecond, you *must* take an action on the message by calling one of the following: AcceptMessage, RejectMessage, ReleaseMessage, ModifyMessage. When using ModeFirst, the message is spontaneously Accepted at reception.

func (*Receiver) RejectMessage 

func (r *Receiver) RejectMessage(ctx context.Context, msg *Message, e *Error) error

Reject notifies the server that the message is invalid.

Rejection error is optional.

func (*Receiver) ReleaseMessage 

func (r *Receiver) ReleaseMessage(ctx context.Context, msg *Message) error

Release releases the message back to the server. The message may be redelivered to this or another consumer.

type ReceiverSettleMode 

type ReceiverSettleMode = encoding.ReceiverSettleMode

ReceiverSettleMode specifies how the receiver will settle messages.

type Sender 

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

Sender sends messages on a single AMQP link.

func (*Sender) Address 

func (s *Sender) Address() string

Address returns the link's address.

func (*Sender) Close 

func (s *Sender) Close(ctx context.Context) error

Close closes the Sender and AMQP link.

func (*Sender) LinkName 

func (s *Sender) LinkName() string

LinkName() is the name of the link used for this Sender.

func (*Sender) MaxMessageSize 

func (s *Sender) MaxMessageSize() uint64

MaxMessageSize is the maximum size of a single message.

func (*Sender) Send 

func (s *Sender) Send(ctx context.Context, msg *Message) error

Send sends a Message.

Blocks until the message is sent, ctx completes, or an error occurs.

Send is safe for concurrent use. Since only a single message can be sent on a link at a time, this is most useful when settlement confirmation has been requested (receiver settle mode is "Second"). In this case, additional messages can be sent while the current goroutine is waiting for the confirmation.

type SenderSettleMode 

type SenderSettleMode = encoding.SenderSettleMode

SenderSettleMode specifies how the sender will settle messages.

type Session 

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

Session is an AMQP session.

A session multiplexes Receivers.

func (*Session) Close 

func (s *Session) Close(ctx context.Context) error

Close gracefully closes the session.

If ctx expires while waiting for servers response, ctx.Err() will be returned. The session will continue to wait for the response until the Client is closed.

func (*Session) NewReceiver 

func (s *Session) NewReceiver(opts ...LinkOption) (*Receiver, error)

NewReceiver opens a new receiver link on the session.

func (*Session) NewSender 

func (s *Session) NewSender(opts ...LinkOption) (*Sender, error)

NewSender opens a new sender link on the session.

type SessionOption 

type SessionOption func(*Session) error

SessionOption is an function for configuring an AMQP session.

func SessionIncomingWindow 

func SessionIncomingWindow(window uint32) SessionOption

SessionIncomingWindow sets the maximum number of unacknowledged transfer frames the server can send. 

func SessionMaxLinks(n int) SessionOption

SessionMaxLinks sets the maximum number of links (Senders/Receivers) allowed on the session.

n must be in the range 1 to 4294967296.

Default: 4294967296.

func SessionOutgoingWindow 

func SessionOutgoingWindow(window uint32) SessionOption

SessionOutgoingWindow sets the maximum number of unacknowledged transfer frames the client can send.

type UUID 

type UUID = encoding.UUID

Source Files

View all Source files

Directories

Path Synopsis
internal
bitmap
buffer
encoding
frames

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.