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Chapter 10. Interoperability

This chapter discusses how to use AMQ .NET in combination with other AMQ components. For an overview of the compatibility of AMQ components, see the product introduction.

10.1. Interoperating with other AMQP clients

AMQP messages are composed using the AMQP type system. This common format is one of the reasons AMQP clients in different languages are able to interoperate with each other.

When sending messages, AMQ .NET automatically converts language-native types to AMQP-encoded data. When receiving messages, the reverse conversion takes place.

Note

More information about AMQP types is available at the interactive type reference maintained by the Apache Qpid project.

Table 10.1. AMQP types
AMQP typeDescription

null

An empty value

boolean

A true or false value

char

A single Unicode character

string

A sequence of Unicode characters

binary

A sequence of bytes

byte

A signed 8-bit integer

short

A signed 16-bit integer

int

A signed 32-bit integer

long

A signed 64-bit integer

ubyte

An unsigned 8-bit integer

ushort

An unsigned 16-bit integer

uint

An unsigned 32-bit integer

ulong

An unsigned 64-bit integer

float

A 32-bit floating point number

double

A 64-bit floating point number

array

A sequence of values of a single type

list

A sequence of values of variable type

map

A mapping from distinct keys to values

uuid

A universally unique identifier

symbol

A 7-bit ASCII string from a constrained domain

timestamp

An absolute point in time

Table 10.2. AMQ .NET types before encoding and after decoding
AMQP typeAMQ .NET type before encodingAMQ .NET type after decoding

null

null

null

boolean

System.Boolean

System.Boolean

char

System.Char

System.Char

string

System.String

System.String

binary

System.Byte[]

System.Byte[]

byte

System.SByte

System.SByte

short

System.Int16

System.Int16

int

System.Int32

System.Int32

long

System.Int64

System.Int64

ubyte

System.Byte

System.Byte

ushort

System.UInt16

System.UInt16

uint

System.UInt32

System.UInt32

ulong

System.UInt64

System.UInt64

float

System.Single

System.Single

double

System.Double

System.Double

list

Amqp.List

Amqp.List

map

Amqp.Map

Amqp.Map

uuid

System.Guid

System.Guid

symbol

Amqp.Symbol

Amqp.Symbol

timestamp

System.DateTime

System.DateTime

Table 10.3. AMQ .NET and other AMQ client types (1 of 2)
AMQ .NET type before encodingAMQ C++ typeAMQ JavaScript type

null

nullptr

null

System.Boolean

bool

boolean

System.Char

wchar_t

number

System.String

std::string

string

System.Byte[]

proton::binary

string

System.SByte

int8_t

number

System.Int16

int16_t

number

System.Int32

int32_t

number

System.Int64

int64_t

number

System.Byte

uint8_t

number

System.UInt16

uint16_t

number

System.UInt32

uint32_t

number

System.UInt64

uint64_t

number

System.Single

float

number

System.Double

double

number

Amqp.List

std::vector

Array

Amqp.Map

std::map

object

System.Guid

proton::uuid

number

Amqp.Symbol

proton::symbol

string

System.DateTime

proton::timestamp

number

Table 10.4. AMQ .NET and other AMQ client types (2 of 2)
AMQ .NET type before encodingAMQ Python typeAMQ Ruby type

null

None

nil

System.Boolean

bool

true, false

System.Char

unicode

String

System.String

unicode

String

System.Byte[]

bytes

String

System.SByte

int

Integer

System.Int16

int

Integer

System.Int32

long

Integer

System.Int64

long

Integer

System.Byte

long

Integer

System.UInt16

long

Integer

System.UInt32

long

Integer

System.UInt64

long

Integer

System.Single

float

Float

System.Double

float

Float

Amqp.List

list

Array

Amqp.Map

dict

Hash

System.Guid

-

-

Amqp.Symbol

str

Symbol

System.DateTime

long

Time

10.2. Interoperating with AMQ JMS

AMQP defines a standard mapping to the JMS messaging model. This section discusses the various aspects of that mapping. For more information, see the AMQ JMS Interoperability chapter.

JMS message types

AMQ .NET provides a single message type whose body type can vary. By contrast, the JMS API uses different message types to represent different kinds of data. The table below indicates how particular body types map to JMS message types.

For more explicit control of the resulting JMS message type, you can set the x-opt-jms-msg-type message annotation. See the AMQ JMS Interoperability chapter for more information.

Table 10.5. AMQ .NET and JMS message types
AMQ .NET body typeJMS message type

System.String

TextMessage

null

TextMessage

System.Byte[]

BytesMessage

Any other type

ObjectMessage

10.3. Connecting to AMQ Broker

AMQ Broker is designed to interoperate with AMQP 1.0 clients. Check the following to ensure the broker is configured for AMQP messaging:

  • Port 5672 in the network firewall is open.
  • The AMQ Broker AMQP acceptor is enabled. See Default acceptor settings.
  • The necessary addresses are configured on the broker. See Addresses, Queues, and Topics.
  • The broker is configured to permit access from your client, and the client is configured to send the required credentials. See Broker Security.
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