Merge pull request #98 from viartemev/add-prefetchSize-to-func

Add prefetchSize to a channel function

Author: viartemev

src/main/kotlin/com/viartemev/thewhiterabbit/channel/Channel.kt

@@ -4,16 +4,16 @@ import com.rabbitmq.client.Channel
 import com.rabbitmq.client.Connection
 import com.viartemev.thewhiterabbit.consumer.ConfirmConsumer
 
-fun Channel.consumer(queue: String) = ConfirmConsumer(this, queue)
+fun Channel.consumer(queue: String, prefetchSize: Int) = ConfirmConsumer(this, queue, prefetchSize)
 
 suspend fun Connection.channel(block: suspend Channel.() -> Unit): Channel {
     val channel = this.createChannel()
     channel.use { block(it) }
     return channel
 }
 
-suspend fun Channel.consume(queue: String, block: suspend ConfirmConsumer.() -> Unit) {
-    val consumer = this.consumer(queue)
+suspend fun Channel.consume(queue: String, prefetchSize: Int = 0, block: suspend ConfirmConsumer.() -> Unit) {
+    val consumer = this.consumer(queue, prefetchSize)
     try {
         block(consumer)
     } finally {

src/main/kotlin/com/viartemev/thewhiterabbit/consumer/ConfirmConsumer.kt

@@ -15,7 +15,7 @@ import kotlinx.coroutines.channels.Channel as KChannel
 
 private val logger = KotlinLogging.logger {}
 
-class ConfirmConsumer internal constructor(private val amqpChannel: Channel, amqpQueue: String, prefetchSize: Int = 0) {
+class ConfirmConsumer internal constructor(private val amqpChannel: Channel, amqpQueue: String, prefetchSize: Int) {
     private val deliveries = KChannel<Delivery>()
     private val consTag: String
 
@@ -26,11 +26,11 @@ class ConfirmConsumer internal constructor(private val amqpChannel: Channel, amq
                 try {
                     deliveries.sendBlocking(message)
                 } catch (e: Exception) {
-                    logger.info { "Consumer $consumerTag has been cancelled" }
+                    logger.debug { "Can't send a message. Consumer $consumerTag has been cancelled" }
                 }
             },
             { consumerTag ->
-                logger.info { "Consumer $consumerTag has been cancelled" }
+                logger.debug { "Consumer $consumerTag has been cancelled" }
                 deliveries.cancel()
             }
         )

src/test/kotlin/com/viartemev/thewhiterabbit/consumer/ConfirmConsumerTest.kt

@@ -33,7 +33,7 @@ class ConfirmConsumerTest {
             runBlocking {
                 connection.channel {
                     declareQueue(QueueSpecification(QUEUE_NAME))
-                    consume(QUEUE_NAME) {
+                    consume(QUEUE_NAME, 2) {
                         for (i in 1..3) consumeWithConfirm({ handleDelivery(it) })
                     }
                 }