refactor Jackson code to hardcode buffer-recycler

refactor Jackson code to hardcode buffer-recycler

update jackson

scalafmt

build.sbt

@@ -21,12 +21,12 @@ def specs2(scalaVersion: String) =
     ("org.specs2" %% s"specs2-$n" % "4.20.5") % Test
   }
 
-val jacksonDatabindVersion = "2.14.3"
+val jacksonDatabindVersion = "2.16.2"
 val jacksonDatabind = Seq(
   "com.fasterxml.jackson.core" % "jackson-databind" % jacksonDatabindVersion
 )
 
-val jacksonVersion = "2.14.3"
+val jacksonVersion = "2.16.2"
 val jacksons = Seq(
   "com.fasterxml.jackson.core"     % "jackson-core",
   "com.fasterxml.jackson.core"     % "jackson-annotations",

play-json/jvm/src/main/scala/play/api/libs/json/jackson/JacksonJson.scala

@@ -14,12 +14,14 @@ import scala.collection.mutable.ArrayBuffer
 import scala.collection.mutable.ListBuffer
 
 import com.fasterxml.jackson.core.JsonFactory
+import com.fasterxml.jackson.core.JsonFactoryBuilder
 import com.fasterxml.jackson.core.JsonGenerator
 import com.fasterxml.jackson.core.JsonParser
 import com.fasterxml.jackson.core.JsonTokenId
 import com.fasterxml.jackson.core.Version
 import com.fasterxml.jackson.core.json.JsonWriteFeature
 import com.fasterxml.jackson.core.util.DefaultPrettyPrinter
+import com.fasterxml.jackson.core.util.JsonRecyclerPools
 
 import com.fasterxml.jackson.databind.Module.SetupContext
 import com.fasterxml.jackson.databind._
@@ -282,9 +284,12 @@ private[json] object JacksonJson {
 }
 
 private[json] case class JacksonJson(jsonConfig: JsonConfig) {
-  private val mapper = (new ObjectMapper).registerModule(new PlayJsonMapperModule(jsonConfig))
-
-  private val jsonFactory = new JsonFactory(mapper)
+  private val jsonFactory = JsonFactory
+    .builder()
+    .recyclerPool(JsonRecyclerPools.threadLocalPool())
+    .asInstanceOf[JsonFactoryBuilder]
+    .build()
+  private val mapper = new ObjectMapper(jsonFactory).registerModule(new PlayJsonMapperModule(jsonConfig))
 
   private def stringJsonGenerator(out: java.io.StringWriter) =
     jsonFactory.createGenerator(out)