Add msgpack-jackson3 module for Jackson 3.x support

.github/workflows/CI.yml

@@ -28,6 +28,7 @@ jobs:
               - 'project/build.properties'
               - 'msgpack-core/**'
               - 'msgpack-jackson/**'
+              - 'msgpack-jackson3/**'
             docs:
               - '**.md'
               - '**.txt'
@@ -81,8 +82,18 @@ jobs:
       - name: Test
         env:
           TEST_JAVA_HOME: ${{ steps.target-jdk.outputs.path }}
-        run: ./sbt test
+        run: |
+          if [[ ${{ matrix.java }} -lt 17 ]]; then
+            ./sbt msgpack-core/test msgpack-jackson/test
+          else
+            ./sbt test
+          fi
       - name: Universal Buffer Test
         env:
           TEST_JAVA_HOME: ${{ steps.target-jdk.outputs.path }}
-        run: ./sbt test -J-Dmsgpack.universal-buffer=true
+        run: |
+          if [[ ${{ matrix.java }} -lt 17 ]]; then
+            ./sbt msgpack-core/test msgpack-jackson/test -J-Dmsgpack.universal-buffer=true
+          else
+            ./sbt test -J-Dmsgpack.universal-buffer=true
+          fi

.github/workflows/release.yml

@@ -38,7 +38,17 @@ jobs:
           PGP_PASSPHRASE: ${{ secrets.PGP_PASSPHRASE }}
           TEST_JAVA_HOME: ${{ steps.jdk8.outputs.path }}
         run: |
-          ./sbt publishSigned
+          ./sbt msgpack-core/publishSigned msgpack-jackson/publishSigned
+      # msgpack-jackson3 requires JDK 17+
+      - uses: actions/setup-java@v5
+        with:
+          java-version: 17
+          distribution: temurin
+      - name: Build bundle for msgpack-jackson3
+        env:
+          PGP_PASSPHRASE: ${{ secrets.PGP_PASSPHRASE }}
+        run: |
+          ./sbt msgpack-jackson3/publishSigned
       - name: Release to Sonatype
         env:
           SONATYPE_USERNAME: '${{ secrets.SONATYPE_USERNAME }}'

README.md

@@ -53,8 +53,16 @@ For using DirectByteBuffer (off-heap memory access methods) in JDK17, you need t
 
 ### Integration with Jackson ObjectMapper (jackson-databind)
 
-msgpack-java supports serialization and deserialization of Java objects through [jackson-databind](https://github.com/FasterXML/jackson-databind).
-For details, see [msgpack-jackson/README.md](https://github.com/msgpack/msgpack-java/blob/develop/msgpack-jackson/README.md). The template-based serialization mechanism used in v06 is deprecated.
+msgpack-java supports serialization and deserialization of Java objects through [jackson-databind](https://github.com/FasterXML/jackson-databind). The template-based serialization mechanism used in v06 is deprecated.
+
+Two artifacts are published depending on which Jackson major version your project uses:
+
+| Jackson version | Artifact | Requirements |
+| --- | --- | --- |
+| Jackson 2.x | [`jackson-dataformat-msgpack`](https://github.com/msgpack/msgpack-java/blob/develop/msgpack-jackson/README.md) | Java 8+ |
+| Jackson 3.x | [`jackson-dataformat-msgpack-jackson3`](https://github.com/msgpack/msgpack-java/blob/develop/msgpack-jackson3/README.md) | Java 17+ |
+
+Use `jackson-dataformat-msgpack` if your project still depends on Jackson 2.x, or `jackson-dataformat-msgpack-jackson3` if you've upgraded to Jackson 3.x. See each module's README for install instructions and usage details.
 
 - [Release Notes](https://github.com/msgpack/msgpack-java/blob/develop/RELEASE_NOTES.md)
 

build.sbt

@@ -115,10 +115,18 @@ val buildSettings = Seq[Setting[?]](
   Test / compile    := Def.uncached((Test / compile).dependsOn(Test / jcheckStyle).value)
 )
 
-val junitJupiter = "org.junit.jupiter" % "junit-jupiter"        % "5.14.4" % "test"
-val junitVintage = "org.junit.vintage" % "junit-vintage-engine" % "5.14.4" % "test"
+val junitJupiter   = "org.junit.jupiter" % "junit-jupiter"        % "5.14.4" % "test"
+val junitVintage   = "org.junit.vintage" % "junit-vintage-engine" % "5.14.4" % "test"
+val junitInterface = "com.github.sbt"    % "junit-interface"      % "0.13.3" % "test"
 
 // Project settings
+val isJava17Plus: Boolean = {
+  val v = sys.props.getOrElse("java.specification.version", "1.8")
+  // getOrElse(false): non-numeric versions (e.g. early-access "17-ea") fail safe
+  // by not compiling the jackson3 module rather than making an optimistic guess.
+  if (v.startsWith("1.")) false else scala.util.Try(v.toInt >= 17).getOrElse(false)
+}
+
 lazy val root = Project(id = "msgpack-java", base = file("."))
   .settings(
     buildSettings,
@@ -127,7 +135,10 @@ lazy val root = Project(id = "msgpack-java", base = file("."))
     publish         := {},
     publishLocal    := {}
   )
-  .aggregate(msgpackCore, msgpackJackson)
+  .aggregate(
+    Seq[ProjectReference](msgpackCore, msgpackJackson) ++
+      (if (isJava17Plus) Seq[ProjectReference](msgpackJackson3) else Nil): _*
+  )
 
 lazy val msgpackCore = Project(id = "msgpack-core", base = file("msgpack-core"))
   .enablePlugins(SbtOsgi)
@@ -188,3 +199,28 @@ lazy val msgpackJackson = Project(id = "msgpack-jackson", base = file("msgpack-j
     testOptions += Tests.Argument(TestFrameworks.JUnit, "-v")
   )
   .dependsOn(msgpackCore)
+
+lazy val msgpackJackson3 = Project(id = "msgpack-jackson3", base = file("msgpack-jackson3"))
+  .enablePlugins(SbtOsgi, JmhPlugin)
+  .settings(
+    buildSettings,
+    name                        := "jackson-dataformat-msgpack-jackson3",
+    description                 := "Jackson 3.x extension that adds support for MessagePack",
+    OsgiKeys.bundleSymbolicName := "org.msgpack.msgpack-jackson3",
+    OsgiKeys.exportPackage      := Seq("org.msgpack.jackson", "org.msgpack.jackson.dataformat"),
+    OsgiKeys.importPackage      := Seq("!android.os", "!sun.*"),
+    Test / fork    := true,
+    javacOptions   := Seq("--release", "17"),
+    doc / javacOptions := Seq("--release", "17", "-Xdoclint:none"),
+    libraryDependencies ++=
+      Seq(
+        "tools.jackson.core" % "jackson-databind" % "3.1.2",
+        junitInterface
+      ),
+    testOptions += Tests.Argument(TestFrameworks.JUnit, "-v"),
+    Jmh / javaOptions ++= Seq(
+      "--add-opens=java.base/java.nio=ALL-UNNAMED",
+      "--add-opens=java.base/sun.nio.ch=ALL-UNNAMED"
+    )
+  )
+  .dependsOn(msgpackCore)