Add support for any kind of declarations when creating publisher / consumer

Note: Breaking Changes
- Removes ConsumerOptions.QueueOptions is removed
- Removes ConsumerOptions.ExchangeOptions is removed
- Adds ConsumerOptions.QueueName as the queue to listen to
- Adds slices Queues, Exchanges and Bindings to ConsumerOptions
- Adds slices Queues, Exchanges and Bindings to PublisherOptions
- Expands Binding to allow for exchange bindings

Author: hofmeister

Diff for: consume.go

@@ -140,21 +140,19 @@ func (consumer *Consumer) startGoroutines(
 	if err != nil {
 		return fmt.Errorf("declare qos failed: %w", err)
 	}
-	err = declareExchange(consumer.chanManager, options.ExchangeOptions)
-	if err != nil {
-		return fmt.Errorf("declare exchange failed: %w", err)
-	}
-	err = declareQueue(consumer.chanManager, options.QueueOptions)
-	if err != nil {
-		return fmt.Errorf("declare queue failed: %w", err)
-	}
-	err = declareBindings(consumer.chanManager, options)
+
+	err = declareAll(consumer.chanManager, declareOptions{
+		Queues:    options.Queues,
+		Exchanges: options.Exchanges,
+		Bindings:  options.Bindings,
+	})
+
 	if err != nil {
-		return fmt.Errorf("declare bindings failed: %w", err)
+		return err
 	}
 
 	msgs, err := consumer.chanManager.ConsumeSafe(
-		options.QueueOptions.Name,
+		options.QueueName,
 		options.RabbitConsumerOptions.Name,
 		options.RabbitConsumerOptions.AutoAck,
 		options.RabbitConsumerOptions.Exclusive,

Diff for: consumer_options.go

@@ -16,26 +16,30 @@ func getDefaultConsumerOptions(queueName string) ConsumerOptions {
 			NoLocal:   false,
 			Args:      Table{},
 		},
-		QueueOptions: QueueOptions{
-			Name:       queueName,
-			Durable:    false,
-			AutoDelete: false,
-			Exclusive:  false,
-			NoWait:     false,
-			Passive:    false,
-			Args:       Table{},
-			Declare:    true,
+		Queues: []QueueOptions{
+			{
+				Name:       queueName,
+				Durable:    false,
+				AutoDelete: false,
+				Exclusive:  false,
+				NoWait:     false,
+				Passive:    false,
+				Args:       Table{},
+				Declare:    true,
+			},
 		},
-		ExchangeOptions: ExchangeOptions{
-			Name:       "",
-			Kind:       amqp.ExchangeDirect,
-			Durable:    false,
-			AutoDelete: false,
-			Internal:   false,
-			NoWait:     false,
-			Passive:    false,
-			Args:       Table{},
-			Declare:    false,
+		Exchanges: []ExchangeOptions{
+			{
+				Name:       "",
+				Kind:       amqp.ExchangeDirect,
+				Durable:    false,
+				AutoDelete: false,
+				Internal:   false,
+				NoWait:     false,
+				Passive:    false,
+				Args:       Table{},
+				Declare:    false,
+			},
 		},
 		Bindings:    []Binding{},
 		Concurrency: 1,
@@ -59,8 +63,9 @@ func getDefaultBindingOptions() BindingOptions {
 // If there are Bindings, the queue will be bound to them
 type ConsumerOptions struct {
 	RabbitConsumerOptions RabbitConsumerOptions
-	QueueOptions          QueueOptions
-	ExchangeOptions       ExchangeOptions
+	QueueName             string
+	Queues                []QueueOptions
+	Exchanges             []ExchangeOptions
 	Bindings              []Binding
 	Concurrency           int
 	Logger                logger.Logger
@@ -93,105 +98,126 @@ type QueueOptions struct {
 	Declare    bool
 }
 
-// Binding describes the bhinding of a queue to a routing key on an exchange
-type Binding struct {
-	RoutingKey string
-	BindingOptions
-}
-
-// BindingOptions describes the options a binding can have
-type BindingOptions struct {
-	NoWait  bool
-	Args    Table
-	Declare bool
-}
-
 // WithConsumerOptionsQueueDurable ensures the queue is a durable queue
 func WithConsumerOptionsQueueDurable(options *ConsumerOptions) {
-	options.QueueOptions.Durable = true
+	WithSimpleQueueOptions(options, func(queueOptions *QueueOptions) {
+		queueOptions.Durable = true
+	})
 }
 
 // WithConsumerOptionsQueueAutoDelete ensures the queue is an auto-delete queue
 func WithConsumerOptionsQueueAutoDelete(options *ConsumerOptions) {
-	options.QueueOptions.AutoDelete = true
+	WithSimpleQueueOptions(options, func(queueOptions *QueueOptions) {
+		queueOptions.AutoDelete = true
+	})
 }
 
 // WithConsumerOptionsQueueExclusive ensures the queue is an exclusive queue
 func WithConsumerOptionsQueueExclusive(options *ConsumerOptions) {
-	options.QueueOptions.Exclusive = true
+	WithSimpleQueueOptions(options, func(queueOptions *QueueOptions) {
+		queueOptions.Exclusive = true
+	})
 }
 
 // WithConsumerOptionsQueueNoWait ensures the queue is a no-wait queue
 func WithConsumerOptionsQueueNoWait(options *ConsumerOptions) {
-	options.QueueOptions.NoWait = true
+	WithSimpleQueueOptions(options, func(queueOptions *QueueOptions) {
+		queueOptions.NoWait = true
+	})
 }
 
 // WithConsumerOptionsQueuePassive ensures the queue is a passive queue
 func WithConsumerOptionsQueuePassive(options *ConsumerOptions) {
-	options.QueueOptions.Passive = true
+	WithSimpleQueueOptions(options, func(queueOptions *QueueOptions) {
+		queueOptions.Passive = true
+	})
 }
 
 // WithConsumerOptionsQueueNoDeclare will turn off the declaration of the queue's
 // existance upon startup
 func WithConsumerOptionsQueueNoDeclare(options *ConsumerOptions) {
-	options.QueueOptions.Declare = false
+	WithSimpleQueueOptions(options, func(queueOptions *QueueOptions) {
+		queueOptions.Declare = false
+	})
 }
 
 // WithConsumerOptionsQueueArgs adds optional args to the queue
 func WithConsumerOptionsQueueArgs(args Table) func(*ConsumerOptions) {
 	return func(options *ConsumerOptions) {
-		options.QueueOptions.Args = args
+		WithSimpleQueueOptions(options, func(queueOptions *QueueOptions) {
+			queueOptions.Args = args
+		})
 	}
 }
 
 // WithConsumerOptionsExchangeName sets the exchange name
 func WithConsumerOptionsExchangeName(name string) func(*ConsumerOptions) {
+
 	return func(options *ConsumerOptions) {
-		options.ExchangeOptions.Name = name
+		WithSimpleExchangeOptions(options, func(exchangeOptions *ExchangeOptions) {
+			exchangeOptions.Name = name
+		})
 	}
 }
 
 // WithConsumerOptionsExchangeKind ensures the queue is a durable queue
 func WithConsumerOptionsExchangeKind(kind string) func(*ConsumerOptions) {
+
 	return func(options *ConsumerOptions) {
-		options.ExchangeOptions.Kind = kind
+		WithSimpleExchangeOptions(options, func(exchangeOptions *ExchangeOptions) {
+			exchangeOptions.Kind = kind
+		})
 	}
 }
 
 // WithConsumerOptionsExchangeDurable ensures the exchange is a durable exchange
 func WithConsumerOptionsExchangeDurable(options *ConsumerOptions) {
-	options.ExchangeOptions.Durable = true
+	WithSimpleExchangeOptions(options, func(exchangeOptions *ExchangeOptions) {
+		exchangeOptions.Durable = true
+	})
 }
 
 // WithConsumerOptionsExchangeAutoDelete ensures the exchange is an auto-delete exchange
 func WithConsumerOptionsExchangeAutoDelete(options *ConsumerOptions) {
-	options.ExchangeOptions.AutoDelete = true
+	WithSimpleExchangeOptions(options, func(exchangeOptions *ExchangeOptions) {
+		exchangeOptions.AutoDelete = true
+	})
 }
 
 // WithConsumerOptionsExchangeInternal ensures the exchange is an internal exchange
 func WithConsumerOptionsExchangeInternal(options *ConsumerOptions) {
-	options.ExchangeOptions.Internal = true
+	WithSimpleExchangeOptions(options, func(exchangeOptions *ExchangeOptions) {
+		exchangeOptions.Internal = true
+	})
 }
 
 // WithConsumerOptionsExchangeNoWait ensures the exchange is a no-wait exchange
 func WithConsumerOptionsExchangeNoWait(options *ConsumerOptions) {
-	options.ExchangeOptions.NoWait = true
+	WithSimpleExchangeOptions(options, func(exchangeOptions *ExchangeOptions) {
+		exchangeOptions.NoWait = true
+	})
 }
 
 // WithConsumerOptionsExchangeDeclare stops this library from declaring the exchanges existance
 func WithConsumerOptionsExchangeDeclare(options *ConsumerOptions) {
-	options.ExchangeOptions.Declare = true
+	WithSimpleExchangeOptions(options, func(exchangeOptions *ExchangeOptions) {
+		exchangeOptions.Declare = true
+	})
 }
 
 // WithConsumerOptionsExchangePassive ensures the exchange is a passive exchange
 func WithConsumerOptionsExchangePassive(options *ConsumerOptions) {
-	options.ExchangeOptions.Passive = true
+	WithSimpleExchangeOptions(options, func(exchangeOptions *ExchangeOptions) {
+		exchangeOptions.Passive = true
+	})
 }
 
 // WithConsumerOptionsExchangeArgs adds optional args to the exchange
 func WithConsumerOptionsExchangeArgs(args Table) func(*ConsumerOptions) {
 	return func(options *ConsumerOptions) {
-		options.ExchangeOptions.Args = args
+		WithSimpleExchangeOptions(options, func(exchangeOptions *ExchangeOptions) {
+			exchangeOptions.Args = args
+		})
 	}
 }
 
@@ -287,9 +313,55 @@ func WithConsumerOptionsQOSGlobal(options *ConsumerOptions) {
 // multiple nodes in the cluster will have the messages distributed amongst them
 // for higher reliability
 func WithConsumerOptionsQueueQuorum(options *ConsumerOptions) {
-	if options.QueueOptions.Args == nil {
-		options.QueueOptions.Args = Table{}
+	WithSimpleQueueOptions(options, func(queueOptions *QueueOptions) {
+		if queueOptions.Args == nil {
+			queueOptions.Args = Table{}
+		}
+
+		queueOptions.Args["x-queue-type"] = "quorum"
+	})
+}
+
+// WithSimpleQueueOptions used for backwards compatibility
+// Will set options on the first queue and ensure that queue exists
+func WithSimpleQueueOptions(options *ConsumerOptions, handler func(queueOptions *QueueOptions)) {
+	if len(options.Queues) == 0 {
+		options.Queues = append(options.Queues, QueueOptions{})
+	}
+
+	handler(&options.Queues[0])
+}
+
+// WithSimpleExchangeOptions used for backwards compatibility
+// Will set options on the first exchange and ensure that exchange exists
+func WithSimpleExchangeOptions(options *ConsumerOptions, handler func(exchangeOptions *ExchangeOptions)) {
+	if len(options.Exchanges) == 0 {
+		options.Exchanges = append(options.Exchanges, ExchangeOptions{})
 	}
 
-	options.QueueOptions.Args["x-queue-type"] = "quorum"
+	handler(&options.Exchanges[0])
+}
+
+func WithConsumerQueue(queue QueueOptions) func(options *ConsumerOptions) {
+	return func(options *ConsumerOptions) {
+		options.Queues = []QueueOptions{queue}
+	}
+}
+
+func WithConsumerQueues(queues []QueueOptions) func(options *ConsumerOptions) {
+	return func(options *ConsumerOptions) {
+		options.Queues = queues
+	}
+}
+
+func WithConsumerBindings(bindings []Binding) func(options *ConsumerOptions) {
+	return func(options *ConsumerOptions) {
+		options.Bindings = bindings
+	}
+}
+
+func WithConsumerExchanges(exchanges []ExchangeOptions) func(options *ConsumerOptions) {
+	return func(options *ConsumerOptions) {
+		options.Exchanges = exchanges
+	}
 }