amqp: pack.ag/amqp Index | Examples | Files

package amqp

import "pack.ag/amqp"

Package amqp provides an AMQP 1.0 client implementation.

AMQP 1.0 is not compatible with AMQP 0-9-1 or 0-10, which are the most common AMQP protocols in use today.

The example below shows how to use this package to connect to a Microsoft Azure Service Bus queue.

Code:

// Create client
client, err := amqp.Dial("amqps://my-namespace.servicebus.windows.net",
    amqp.ConnSASLPlain("access-key-name", "access-key"),
)
if err != nil {
    log.Fatal("Dialing AMQP server:", err)
}
defer client.Close()

// Open a session
session, err := client.NewSession()
if err != nil {
    log.Fatal("Creating AMQP session:", err)
}

ctx := context.Background()

// Send a message
{
    // Create a sender
    sender, err := session.NewSender(
        amqp.LinkTargetAddress("/queue-name"),
    )
    if err != nil {
        log.Fatal("Creating sender link:", err)
    }

    ctx, cancel := context.WithTimeout(ctx, 5*time.Second)

    // Send message
    err = sender.Send(ctx, amqp.NewMessage([]byte("Hello!")))
    if err != nil {
        log.Fatal("Sending message:", err)
    }

    sender.Close(ctx)
    cancel()
}

// Continuously read messages
{
    // Create a receiver
    receiver, err := session.NewReceiver(
        amqp.LinkSourceAddress("/queue-name"),
        amqp.LinkCredit(10),
    )
    if err != nil {
        log.Fatal("Creating receiver link:", err)
    }
    defer func() {
        ctx, cancel := context.WithTimeout(ctx, 1*time.Second)
        receiver.Close(ctx)
        cancel()
    }()

    for {
        // Receive next message
        msg, err := receiver.Receive(ctx)
        if err != nil {
            log.Fatal("Reading message from AMQP:", err)
        }

        // Accept message
        msg.Accept()

        fmt.Printf("Message received: %s\n", msg.GetData())
    }
}

Index

Examples

Package Files

bitmap.go buffer.go client.go conn.go decode.go doc.go encode.go error_stdlib.go log.go sasl.go types.go

Constants

const (
    DefaultMaxLinks = 4294967296
    DefaultWindow   = 100
)

Default session options

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

Default link options

const (
    DefaultIdleTimeout  = 1 * time.Minute
    DefaultMaxFrameSize = 512
    DefaultMaxSessions  = 65536
)

Default connection options

Variables

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

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

Errors

type Annotations Uses

type Annotations map[interface{}]interface{}

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

String keys are encoded as AMQP Symbols.

type ArrayUByte Uses

type ArrayUByte []uint8

ArrayUByte allows encoding []uint8/[]byte as an array rather than binary data.

type Client Uses

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

Client is an AMQP client connection.

func Dial Uses

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

Dial connects to an AMQP server.

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

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

func New Uses

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

New establishes an AMQP client connection over conn.

func (*Client) Close Uses

func (c *Client) Close() error

Close disconnects the connection.

func (*Client) NewSession Uses

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

NewSession opens a new AMQP session to the server.

type ConnOption Uses

type ConnOption func(*conn) error

ConnOption is a function for configuring an AMQP connection.

func ConnConnectTimeout Uses

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 Uses

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 Uses

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 Uses

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 Uses

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 Uses

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 Uses

func ConnSASLAnonymous() ConnOption

ConnSASLAnonymous enables SASL ANONYMOUS authentication for the connection.

func ConnSASLPlain Uses

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 Uses

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 Uses

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 Uses

func ConnTLS(enable bool) ConnOption

ConnTLS toggles TLS negotiation.

Default: false.

func ConnTLSConfig Uses

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 Uses

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 Uses

func (e *DetachError) Error() string

type Durability Uses

type Durability uint32

Durability specifies the durability of a link.

const (
    // No terminus state is retained durably.
    DurabilityNone Durability = 0

    // Only the existence and configuration of the terminus is
    // retained durably.
    DurabilityConfiguration Durability = 1

    // In addition to the existence and configuration of the
    // terminus, the unsettled state for durable messages is
    // retained durably.
    DurabilityUnsettledState Durability = 2
)

Durability Policies

func (*Durability) String Uses

func (d *Durability) String() string

type Error Uses

type Error struct {
    // A symbolic value indicating the error condition.
    Condition ErrorCondition

    // descriptive text about the error condition
    //
    // This text supplies any supplementary details not indicated by the condition field.
    // This text can be logged as an aid to resolving issues.
    Description string

    // map carrying information about the error condition
    Info map[string]interface{}
}

Error is an AMQP error.

func (*Error) Error Uses

func (e *Error) Error() string

func (*Error) String Uses

func (e *Error) String() string

type ErrorCondition Uses

type ErrorCondition string

ErrorCondition is one of the error conditions defined in the AMQP spec.

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 Uses

type ExpiryPolicy symbol

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.

const (
    // The expiry timer starts when terminus is detached.
    ExpiryLinkDetach ExpiryPolicy = "link-detach"

    // The expiry timer starts when the most recently
    // associated session is ended.
    ExpirySessionEnd ExpiryPolicy = "session-end"

    // The expiry timer starts when most recently associated
    // connection is closed.
    ExpiryConnectionClose ExpiryPolicy = "connection-close"

    // The terminus never expires.
    ExpiryNever ExpiryPolicy = "never"
)

Expiry Policies

func (*ExpiryPolicy) String Uses

func (e *ExpiryPolicy) String() string

type LinkOption Uses

type LinkOption func(*link) error

LinkOption is a function for configuring an AMQP link.

A link may be a Sender or a Receiver.

func LinkAddress Uses

func LinkAddress(source string) LinkOption

LinkAddress sets the link address.

For a Receiver this configures the source address. For a Sender this configures the target address.

Deprecated: use LinkSourceAddress or LinkTargetAddress instead.

func LinkAddressDynamic Uses

func LinkAddressDynamic() LinkOption

LinkAddressDynamic requests a dynamically created address from the server.

func LinkBatchMaxAge Uses

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 Uses

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 Uses

func LinkCredit(credit uint32) LinkOption

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

func LinkMaxMessageSize Uses

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 Uses

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 Uses

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 LinkPropertyInt64 Uses

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 Uses

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 Uses

func LinkSelectorFilter(filter string) LinkOption

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

func LinkSenderSettle Uses

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 Uses

func LinkSourceAddress(addr string) LinkOption

LinkSourceAddress sets the source address.

func LinkSourceCapabilities Uses

func LinkSourceCapabilities(capabilities ...string) LinkOption

LinkSourceCapabilities sets the source capabilities.

func LinkSourceDurability Uses

func LinkSourceDurability(d Durability) LinkOption

LinkSourceDurability sets the source durability policy.

Default: DurabilityNone.

func LinkSourceExpiryPolicy Uses

func LinkSourceExpiryPolicy(p ExpiryPolicy) LinkOption

LinkSourceExpiryPolicy sets the link expiration policy.

Default: ExpirySessionEnd.

func LinkSourceFilter Uses

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 LinkTargetAddress Uses

func LinkTargetAddress(addr string) LinkOption

LinkTargetAddress sets the target address.

func LinkTargetDurability Uses

func LinkTargetDurability(d Durability) LinkOption

LinkTargetDurability sets the target durability policy.

Default: DurabilityNone.

func LinkTargetExpiryPolicy Uses

func LinkTargetExpiryPolicy(p ExpiryPolicy) LinkOption

LinkTargetExpiryPolicy sets the link expiration policy.

Default: ExpirySessionEnd.

type Message Uses

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.
    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 Annotations

    // The message-annotations section is used for properties of the message which
    // are aimed at the infrastructure.
    Annotations 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.
    Data [][]byte

    // Value payload.
    Value 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 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 Uses

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) Accept Uses

func (m *Message) Accept() error

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

func (*Message) GetData Uses

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

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

func (*Message) MarshalBinary Uses

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

MarshalBinary encodes the message into binary form.

func (*Message) Modify Uses

func (m *Message) Modify(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 (*Message) Reject Uses

func (m *Message) Reject(e *Error) error

Reject notifies the server that the message is invalid.

Rejection error is optional.

func (*Message) Release Uses

func (m *Message) Release() error

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

func (*Message) UnmarshalBinary Uses

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

UnmarshalBinary decodes the message from binary form.

type MessageHeader Uses

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.

type MessageProperties Uses

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 interface{} // 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 []byte

    // 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  string

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

    // The address of the node to send replies to.
    ReplyTo string

    // This is a client-specific id that can be used to mark or identify messages
    // between clients.
    CorrelationID interface{} // 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 string

    // 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 string

    // 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 uint32 // 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.

type Receiver Uses

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

Receiver receives messages on a single AMQP link.

func (*Receiver) Address Uses

func (r *Receiver) Address() string

Address returns the link's address.

func (*Receiver) Close Uses

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) Receive Uses

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.

type ReceiverSettleMode Uses

type ReceiverSettleMode uint8

ReceiverSettleMode specifies how the receiver will settle messages.

const (
    // Receiver will spontaneously settle all incoming transfers.
    ModeFirst ReceiverSettleMode = 0

    // Receiver will only settle after sending the disposition to the
    // sender and receiving a disposition indicating settlement of
    // the delivery from the sender.
    ModeSecond ReceiverSettleMode = 1
)

Receiver Settlement Modes

func (*ReceiverSettleMode) String Uses

func (m *ReceiverSettleMode) String() string

type Sender Uses

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

Sender sends messages on a single AMQP link.

func (*Sender) Address Uses

func (s *Sender) Address() string

Address returns the link's address.

func (*Sender) Close Uses

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

Close closes the Sender and AMQP link.

func (*Sender) Send Uses

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 Uses

type SenderSettleMode uint8

SenderSettleMode specifies how the sender will settle messages.

const (
    // Sender will send all deliveries initially unsettled to the receiver.
    ModeUnsettled SenderSettleMode = 0

    // Sender will send all deliveries settled to the receiver.
    ModeSettled SenderSettleMode = 1

    // Sender MAY send a mixture of settled and unsettled deliveries to the receiver.
    ModeMixed SenderSettleMode = 2
)

Sender Settlement Modes

func (*SenderSettleMode) String Uses

func (m *SenderSettleMode) String() string

type Session Uses

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

Session is an AMQP session.

A session multiplexes Receivers.

func (*Session) Close Uses

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 Uses

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

NewReceiver opens a new receiver link on the session.

func (*Session) NewSender Uses

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

NewSender opens a new sender link on the session.

type SessionOption Uses

type SessionOption func(*Session) error

SessionOption is an function for configuring an AMQP session.

func SessionIncomingWindow Uses

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 Uses

func SessionOutgoingWindow(window uint32) SessionOption

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

type UUID Uses

type UUID [16]byte

UUID is a 128 bit identifier as defined in RFC 4122.

func (UUID) String Uses

func (u UUID) String() string

String returns the hex encoded representation described in RFC 4122, Section 3.

Package amqp imports 20 packages (graph) and is imported by 22 packages. Updated 2019-12-10. Refresh now. Tools for package owners.