akka-http-avro
akka-http avro marshalling/unmarshalling for generated java avro specific records
Versions
| Version | Release date | Akka Http version | Avro version | Scala versions |
|---|---|---|---|---|
0.1.2 |
2020-09-18 | 10.2.0 |
1.10.0 |
2.13.3, 2.12.12 |
0.1.1 |
2020-07-03 | 10.1.12 |
1.10.0 |
2.13.3, 2.12.11, 2.11.12 |
0.1.0 |
2020-03-01 | 10.1.11 |
1.9.2 |
2.13.1, 2.12.10, 2.11.12 |
The complete list can be found in the CHANGELOG file.
Getting akka-http-avro
Libraries are published to Maven Central. Add to your build.sbt:
libraryDependencies += "fr.davit" %% "akka-http-avro" % <version>
Quick start
For the examples, we are using the following avro domain model
{
"namespace": "com.example",
"type": "record",
"name": "Item",
"fields": [
{
"name": "name",
"type": "string"
},
{
"name": "id",
"type": "long"
}
]
}
and
{
"namespace": "com.example",
"type": "record",
"name": "Order",
"fields": [
{
"name": "items",
"type": {
"type" : "array",
"items": "com.example.Item"
}
}
]
}
Marshalling/Unmarshalling of the generated classes depends on the Accept/Content-Type header sent by the client:
Content-Type: application/json: jsonContent-Type: avro/binary: binary
-No Accept header or matching several (eg Accept: application/*) will take the 1st matching type from the above list.
Avro
The implicit marshallers and unmarshallers for your generated avro classes are defined in AvroSupport. Specific (un)marshallers can be imported from AvroBinarySupport, AvroJsonSupport. You simply need to have them in scope.
import akka.http.scaladsl.server.Directives._
import fr.davit.akka.http.scaladsl.marshallers.avro.AvroSupport._
object MyAvroService {
val route =
get {
pathSingleSlash {
complete(Item.newBuilder().setName("thing").setId(42).build())
}
} ~ post {
entity(as[Order]) { order =>
val itemsCount = order.getItems.size
val itemNames = order.getItems.asScala.map(_.getName).mkString(", ")
complete(s"Ordered $itemsCount items: $itemNames")
}
}
}
Limitation
Entity streaming (http chunked transfer) is at the moment not supported by the library.