[Java] Upgrade to Build Scan 3.0, Shadow 5.2.0, ByteBuddy 1.10.2, and…

… support Java building versions greater than 8.

build.gradle

@@ -21,9 +21,10 @@ buildscript {
 
 plugins {
     id 'java'
-    id 'com.gradle.build-scan' version '2.4.2'
+    id 'idea'
+    id 'com.gradle.build-scan' version '3.0'
     id 'io.freefair.javadoc-links' version '4.1.3' apply false
-    id 'com.github.johnrengelman.shadow' version '5.1.0' apply false
+    id 'com.github.johnrengelman.shadow' version '5.2.0' apply false
     id 'biz.aQute.bnd.builder' version '4.2.0' apply false
 }
 
@@ -39,11 +40,10 @@ if (env.CI || env.TRAVIS) {
 
 def aeronGroup = 'io.aeron'
 def aeronVersion = file('version.txt').text.trim()
-def aeronJavaVersion = JavaVersion.VERSION_1_8
 
 def agronaVersion = '1.0.11'
 def sbeVersion = '1.14.1'
-def byteBuddyVersion = '1.9.10'
+def byteBuddyVersion = '1.10.2'
 def hdrHistogramVersion = '2.1.11'
 def mockitoVersion = '3.1.0'
 
@@ -151,15 +151,23 @@ subprojects {
     checkstyle.toolVersion = '8.25'
 
     compileJava {
-        sourceCompatibility = aeronJavaVersion
-        targetCompatibility = aeronJavaVersion
+        if (JavaVersion.current().ordinal() >= JavaVersion.VERSION_1_9.ordinal()) {
+            options.compilerArgs.addAll(['--add-exports', 'java.base/java.lang.reflect=ALL-UNNAMED'])
+            options.compilerArgs.addAll(['--add-exports', 'java.base/java.net=ALL-UNNAMED'])
+            options.compilerArgs.addAll(['--add-exports', 'java.base/sun.nio.ch=ALL-UNNAMED'])
+            options.compilerArgs.addAll(['--add-exports', 'jdk.unsupported/sun.misc=ALL-UNNAMED'])
+        }
         options.encoding = 'UTF-8'
         options.deprecation = true
     }
 
     compileTestJava {
-        sourceCompatibility = aeronJavaVersion
-        targetCompatibility = aeronJavaVersion
+        if (JavaVersion.current().ordinal() >= JavaVersion.VERSION_1_9.ordinal()) {
+            options.compilerArgs.addAll(['--add-exports', 'java.base/java.lang.reflect=ALL-UNNAMED'])
+            options.compilerArgs.addAll(['--add-exports', 'java.base/java.net=ALL-UNNAMED'])
+            options.compilerArgs.addAll(['--add-exports', 'java.base/sun.nio.ch=ALL-UNNAMED'])
+            options.compilerArgs.addAll(['--add-exports', 'jdk.unsupported/sun.misc=ALL-UNNAMED'])
+        }
         options.encoding = 'UTF-8'
         options.deprecation = true
     }
@@ -362,8 +370,12 @@ project(':aeron-archive') {
 
     compileGeneratedJava {
         dependsOn 'generateCodecs'
-        sourceCompatibility = aeronJavaVersion
-        targetCompatibility = aeronJavaVersion
+        if (JavaVersion.current().ordinal() >= JavaVersion.VERSION_1_9.ordinal()) {
+            options.compilerArgs.addAll(['--add-exports', 'java.base/java.lang.reflect=ALL-UNNAMED'])
+            options.compilerArgs.addAll(['--add-exports', 'java.base/java.net=ALL-UNNAMED'])
+            options.compilerArgs.addAll(['--add-exports', 'java.base/sun.nio.ch=ALL-UNNAMED'])
+            options.compilerArgs.addAll(['--add-exports', 'jdk.unsupported/sun.misc=ALL-UNNAMED'])
+        }
         options.encoding = 'UTF-8'
         options.deprecation = true
         classpath += configurations.codecGeneration
@@ -474,8 +486,12 @@ project(':aeron-cluster') {
 
     compileGeneratedJava {
         dependsOn 'generateCodecs'
-        sourceCompatibility = aeronJavaVersion
-        targetCompatibility = aeronJavaVersion
+        if (JavaVersion.current().ordinal() >= JavaVersion.VERSION_1_9.ordinal()) {
+            options.compilerArgs.addAll(['--add-exports', 'java.base/java.lang.reflect=ALL-UNNAMED'])
+            options.compilerArgs.addAll(['--add-exports', 'java.base/java.net=ALL-UNNAMED'])
+            options.compilerArgs.addAll(['--add-exports', 'java.base/sun.nio.ch=ALL-UNNAMED'])
+            options.compilerArgs.addAll(['--add-exports', 'jdk.unsupported/sun.misc=ALL-UNNAMED'])
+        }
         options.encoding = 'UTF-8'
         options.deprecation = true
         classpath += configurations.codecGeneration

gradle.properties

@@ -1,3 +1,2 @@
 org.gradle.daemon = true
-org.gradle.caching = true
 org.gradle.jvmargs=-XX:+UseParallelOldGC