Use multi release jar to move the Jackson v3 implementation in vertx-core.

Author: vietj

vertx-core-jackson-v3/pom.xml

@@ -26,7 +26,7 @@
   <name>Vert.x Core Jackson v3 plugin</name>
 
   <properties>
-    <maven.compiler.release>17</maven.compiler.release>
+    <maven.compiler.release>25</maven.compiler.release>
   </properties>
 
   <dependencies>

vertx-core-jackson-v3/src/main/java/io/vertx/core/jacksonv3/JacksonFactory.java

@@ -1,6 +1,5 @@
 package io.vertx.tests.jacksonv3;
 
-import io.vertx.core.jacksonv3.JacksonCodec;
 import io.vertx.core.json.Json;
 import io.vertx.core.json.JsonObject;
 import org.junit.Test;
@@ -21,7 +20,7 @@ public void testNoJacksonV2() {
 
   @Test
   public void testFactory() {
-    assertEquals(JacksonCodec.class, Json.CODEC.getClass());
+    assertEquals("io.vertx.core.json.jackson.v3.JacksonCodec", Json.CODEC.getClass().getName());
   }
 
   @Test

vertx-core-jackson-v3/src/main/java/module-info.java

@@ -127,6 +127,12 @@
       <artifactId>jackson-databind</artifactId>
       <optional>true</optional>
     </dependency>
+    <dependency>
+      <groupId>tools.jackson.core</groupId>
+      <artifactId>jackson-core</artifactId>
+      <version>3.0.0-rc1</version>
+      <optional>true</optional>
+    </dependency>
 
     <!-- Loggers -->
     <dependency>
@@ -245,6 +251,19 @@
                 </annotationProcessorPaths>
               </configuration>
             </execution>
+            <execution>
+              <id>jdk25</id>
+              <goals>
+                <goal>compile</goal>
+              </goals>
+              <configuration>
+                <release>25</release>
+                <compileSourceRoots>
+                  <compileSourceRoot>${project.basedir}/src/main/java25</compileSourceRoot>
+                </compileSourceRoots>
+                <multiReleaseOutput>true</multiReleaseOutput>
+              </configuration>
+            </execution>
           </executions>
         </plugin>
 

vertx-core-jackson-v3/src/test/java/io/vertx/tests/jacksonv3/JsonTest.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2011-2019 Contributors to the Eclipse Foundation
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
+ * which is available at https://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
+ */
+
+package io.vertx.core.json.jackson;
+
+import io.vertx.core.spi.json.JsonCodec;
+
+/**
+ * @author <a href="mailto:[email protected]">Julien Viet</a>
+ */
+public class JacksonFactory implements io.vertx.core.spi.JsonFactory {
+
+  public static final JacksonFactory INSTANCE = new JacksonFactory();
+
+  public static final JsonCodec CODEC;
+
+  static {
+    JsonCodec codec;
+    try {
+      codec = new io.vertx.core.json.jackson.v3.JacksonCodec();
+    } catch (Throwable ignore1) {
+      // Not available
+      try {
+        codec = new DatabindCodec();
+      } catch (Throwable ignore2) {
+        // No databind
+        codec = new JacksonCodec();
+      }
+    }
+    CODEC = codec;
+  }
+
+  @Override
+  public JsonCodec codec() {
+    return CODEC;
+  }
+}

vertx-core/pom.xml

@@ -1,4 +1,4 @@
-package io.vertx.core.jacksonv3;
+package io.vertx.core.json.jackson.v3;
 
 import io.vertx.core.buffer.Buffer;
 import io.vertx.core.json.DecodeException;