Configurable size limit for producer

api/src/main/scala/com/avast/clients/rabbitmq/api/exceptions.scala

@@ -4,3 +4,5 @@ import java.io.IOException
 case class ConversionException(desc: String, cause: Throwable = null) extends RuntimeException(desc, cause)
 
 case class ChannelNotRecoveredException(desc: String, cause: Throwable = null) extends IOException(desc, cause)
+
+case class TooBigMessage(desc: String, cause: Throwable = null) extends IllegalArgumentException(desc, cause)

core/src/main/scala/com/avast/clients/rabbitmq/DefaultRabbitMQClientFactory.scala

@@ -286,6 +286,7 @@ private[rabbitmq] class DefaultRabbitMQClientFactory[F[_]: ConcurrentEffect: Tim
           channel,
           defaultProperties,
           producerConfig.reportUnroutable,
+          producerConfig.sizeLimitBytes,
           blocker,
           logger,
           monitor

core/src/main/scala/com/avast/clients/rabbitmq/DefaultRabbitMQProducer.scala

@@ -19,6 +19,7 @@ class DefaultRabbitMQProducer[F[_], A: ProductConverter](name: String,
                                                          channel: ServerChannel,
                                                          defaultProperties: MessageProperties,
                                                          reportUnroutable: Boolean,
+                                                         sizeLimitBytes: Option[Int],
                                                          blocker: Blocker,
                                                          logger: ImplicitContextLogger[F],
                                                          monitor: Monitor[F])(implicit F: Effect[F], cs: ContextShift[F])
@@ -54,7 +55,8 @@ class DefaultRabbitMQProducer[F[_], A: ProductConverter](name: String,
   }
 
   private def send(routingKey: String, body: Bytes, properties: MessageProperties)(implicit correlationId: CorrelationId): F[Unit] = {
-    logger.debug(s"Sending message with ${body.size()} B to exchange $exchangeName with routing key '$routingKey' and $properties") >>
+    checkSize(body, routingKey) >>
+      logger.debug(s"Sending message with ${body.size()} B to exchange $exchangeName with routing key '$routingKey' and $properties") >>
       blocker
         .delay {
           sendLock.synchronized {
@@ -76,6 +78,20 @@ class DefaultRabbitMQProducer[F[_], A: ProductConverter](name: String,
         }
   }
 
+  private def checkSize(bytes: Bytes, routingKey: String)(implicit correlationId: CorrelationId): F[Unit] = {
+    sizeLimitBytes match {
+      case Some(limit) =>
+        val size = bytes.size()
+        if (size >= limit) {
+          logger.warn {
+            s"[$name] Will not send message with $size B to exchange $exchangeName with routing key '$routingKey' as it is over the limit $limit B"
+          } >> F.raiseError[Unit](TooBigMessage(s"Message too big ($size/$limit)"))
+        } else F.unit
+
+      case None => F.unit
+    }
+  }
+
   // scalastyle:off
   private object LoggingReturnListener extends ReturnListener {
     override def handleReturn(replyCode: Int,

core/src/main/scala/com/avast/clients/rabbitmq/PoisonedMessageHandler.scala

@@ -62,11 +62,14 @@ object DeadQueuePoisonedMessageHandler {
                           connection: RabbitMQConnection[F],
                           monitor: Monitor[F]): Resource[F, DeadQueuePoisonedMessageHandler[F, A]] = {
     val dqpc = c.deadQueueProducer
-    val pc = ProducerConfig(name = dqpc.name,
-                            exchange = dqpc.exchange,
-                            declare = dqpc.declare,
-                            reportUnroutable = dqpc.reportUnroutable,
-                            properties = dqpc.properties)
+    val pc = ProducerConfig(
+      name = dqpc.name,
+      exchange = dqpc.exchange,
+      declare = dqpc.declare,
+      reportUnroutable = dqpc.reportUnroutable,
+      sizeLimitBytes = dqpc.sizeLimitBytes,
+      properties = dqpc.properties
+    )
 
     connection.newProducer[Bytes](pc, monitor.named("deadQueueProducer")).map { producer =>
       new DeadQueuePoisonedMessageHandler[F, A](c.maxAttempts)((d: Delivery[A], rawBody: Bytes, dctx: DeliveryContext) => {

core/src/main/scala/com/avast/clients/rabbitmq/configuration.scala

@@ -78,6 +78,7 @@ final case class ProducerConfig(name: String,
                                 exchange: String,
                                 declare: Option[AutoDeclareExchangeConfig] = None,
                                 reportUnroutable: Boolean = true,
+                                sizeLimitBytes: Option[Int] = None,
                                 properties: ProducerPropertiesConfig = ProducerPropertiesConfig())
 
 final case class ProducerPropertiesConfig(deliveryMode: Int = 2,
@@ -120,6 +121,7 @@ final case class DeadQueueProducerConfig(name: String,
                                          routingKey: String,
                                          declare: Option[AutoDeclareExchangeConfig] = None,
                                          reportUnroutable: Boolean = true,
+                                         sizeLimitBytes: Option[Int] = None,
                                          properties: ProducerPropertiesConfig = ProducerPropertiesConfig())
 
 case object NoOpPoisonedMessageHandling extends PoisonedMessageHandlingConfig

core/src/test/scala/com/avast/clients/rabbitmq/DefaultRabbitMQProducerTest.scala

@@ -1,7 +1,7 @@
 package com.avast.clients.rabbitmq
 
 import com.avast.bytes.Bytes
-import com.avast.clients.rabbitmq.api.{CorrelationIdStrategy, MessageProperties}
+import com.avast.clients.rabbitmq.api._
 import com.avast.clients.rabbitmq.logging.ImplicitContextLogger
 import com.avast.metrics.scalaeffectapi.Monitor
 import com.rabbitmq.client.AMQP
@@ -31,6 +31,7 @@ class DefaultRabbitMQProducerTest extends TestBase {
       monitor = Monitor.noOp(),
       defaultProperties = MessageProperties.empty,
       reportUnroutable = false,
+      sizeLimitBytes = None,
       blocker = TestBase.testBlocker,
       logger = ImplicitContextLogger.createLogger
     )
@@ -72,6 +73,7 @@ class DefaultRabbitMQProducerTest extends TestBase {
       monitor = Monitor.noOp(),
       defaultProperties = MessageProperties.empty,
       reportUnroutable = false,
+      sizeLimitBytes = None,
       blocker = TestBase.testBlocker,
       logger = ImplicitContextLogger.createLogger
     )
@@ -113,6 +115,7 @@ class DefaultRabbitMQProducerTest extends TestBase {
       monitor = Monitor.noOp(),
       defaultProperties = MessageProperties.empty,
       reportUnroutable = false,
+      sizeLimitBytes = None,
       blocker = TestBase.testBlocker,
       logger = ImplicitContextLogger.createLogger
     )
@@ -151,6 +154,7 @@ class DefaultRabbitMQProducerTest extends TestBase {
       monitor = Monitor.noOp(),
       defaultProperties = MessageProperties.empty,
       reportUnroutable = false,
+      sizeLimitBytes = None,
       blocker = TestBase.testBlocker,
       logger = ImplicitContextLogger.createLogger
     )
@@ -169,4 +173,36 @@ class DefaultRabbitMQProducerTest extends TestBase {
     // check that some CID was generated
     assert(captor.getValue.getCorrelationId != null)
   }
+
+  test("too big message is denied") {
+    val exchangeName = Random.nextString(10)
+    val routingKey = Random.nextString(10)
+
+    val limit = 500
+
+    val channel = mock[AutorecoveringChannel]
+
+    val producer = new DefaultRabbitMQProducer[Task, Bytes](
+      name = "test",
+      exchangeName = exchangeName,
+      channel = channel,
+      monitor = Monitor.noOp(),
+      defaultProperties = MessageProperties.empty,
+      reportUnroutable = false,
+      sizeLimitBytes = Some(limit),
+      blocker = TestBase.testBlocker,
+      logger = ImplicitContextLogger.createLogger
+    )
+
+    // don't test anything except it doesn't fail
+    producer.send(routingKey, Bytes.copyFrom(Array.fill(499)(32.toByte))).await
+
+    assertThrows[TooBigMessage] {
+      producer.send(routingKey, Bytes.copyFrom(Array.fill(501)(32.toByte))).await
+    }
+
+    assertThrows[TooBigMessage] {
+      producer.send(routingKey, Bytes.copyFrom(Array.fill(Random.nextInt(1000) + 500)(32.toByte))).await
+    }
+  }
 }