Remove jcenter() from build, update jcstress plugin to 0.8.8 (reactor…

…#2666)

On top of being used as a repository, JCenter was also used to
retrieve the baseline jars for japicmp. This is now based on Maven
Central.

This also bumps the jcstress-gradle-plugin to 0.8.8 which allows
to unpin the version of jcstress executable. 

See reactor/reactor#695.

build.gradle

@@ -17,7 +17,7 @@ buildscript {
 	//we define kotlin version for benefit of both core and test (see kotlin-gradle-plugin below)
 	ext.kotlinVersion = '1.3.72'
 	repositories {
-		jcenter()
+		mavenCentral()
 		maven { url "https://repo.spring.io/plugins-release" }
 	}
 	dependencies {
@@ -37,12 +37,17 @@ plugins {
 	id "com.jfrog.artifactory" version "4.15.2" apply false
 	id 'biz.aQute.bnd.builder' version '5.0.1' apply false
 	id 'io.spring.nohttp' version '0.0.5.RELEASE'
+	id "com.github.erizo.gradle.jcstress" version "0.8.8" apply false
 }
 
 apply plugin: "io.reactor.gradle.detect-ci"
 apply from: "gradle/asciidoc.gradle" //asciidoc (which is generated from root dir)
 apply from: "gradle/releaser.gradle"
 
+repositories { //needed at root for asciidoctor and nohttp-checkstyle
+	mavenCentral()
+}
+
 ext {
 	jdk = JavaVersion.current().majorVersion
 	jdkJavadoc = "https://docs.oracle.com/javase/$jdk/docs/api/"
@@ -110,7 +115,6 @@ configure(subprojects) { p ->
 
 	repositories {
 		mavenCentral()
-		jcenter()
 		maven { url "https://oss.sonatype.org/content/repositories/releases/" }
 
 		mavenLocal()

buildSrc/build.gradle

@@ -20,7 +20,6 @@ plugins {
 
 repositories {
 	mavenCentral()
-	jcenter()
 	gradlePluginPortal()
 }
 

docs/asciidoc/kotlin.adoc

@@ -13,9 +13,9 @@ This section describes Reactor's support for Kotlin.
 == Requirements
 
 Reactor supports Kotlin 1.1+ and requires
-https://bintray.com/bintray/jcenter/org.jetbrains.kotlin%3Akotlin-stdlib[`kotlin-stdlib`]
-(or one of its https://bintray.com/bintray/jcenter/org.jetbrains.kotlin%3Akotlin-stdlib-jre7[`kotlin-stdlib-jre7`]
-or https://bintray.com/bintray/jcenter/org.jetbrains.kotlin%3Akotlin-stdlib-jre8[`kotlin-stdlib-jre8`] variants).
+https://search.maven.org/artifact/org.jetbrains.kotlin/kotlin-stdlib[`kotlin-stdlib`]
+(or one of its https://search.maven.org/artifact/org.jetbrains.kotlin/kotlin-stdlib-jdk7[`kotlin-stdlib-jdk7`]
+or https://search.maven.org/artifact/org.jetbrains.kotlin/kotlin-stdlib-jdk8[`kotlin-stdlib-jdk8`] variants).
 
 [[kotlin-extensions]]
 == Extensions

gradle/asciidoc.gradle

@@ -15,10 +15,6 @@
  */
 
 configure(rootProject) {
-	repositories {
-		jcenter()
-	}
-
 	apply plugin: 'org.asciidoctor.jvm.convert'
 	apply plugin: 'org.asciidoctor.jvm.pdf'
 

reactor-core/build.gradle

@@ -15,17 +15,6 @@
  */
 import me.champeau.gradle.japicmp.JapicmpTask
 
-buildscript {
-	repositories {
-		jcenter()
-	}
-
-	dependencies {
-		// when updating this plugin, revisit pinning the version of the jcstress jar near line 356
-		classpath 'com.github.erizo.gradle:jcstress-gradle-plugin:0.8.6'
-	}
-}
-
 apply plugin: 'idea' //needed to avoid IDEA seeing the jmh folder as source
 apply plugin: 'biz.aQute.bnd.builder'
 apply plugin: 'org.unbroken-dome.test-sets'
@@ -130,7 +119,7 @@ task downloadBaseline(type: Download) {
 	onlyIfNewer true
 	compress true
 
-	src "${repositories.jcenter().url}io/projectreactor/reactor-core/$compatibleVersion/reactor-core-${compatibleVersion}.jar"
+	src "${repositories.mavenCentral().url}io/projectreactor/reactor-core/$compatibleVersion/reactor-core-${compatibleVersion}.jar"
 	dest "${buildDir}/baselineLibs/reactor-core-${compatibleVersion}.jar"
 }
 
@@ -256,7 +245,6 @@ check.dependsOn japicmp
 
 jcstress {
 	mode = 'quick' //quick, default, tough
-	jcstressDependency = "org.openjdk.jcstress:jcstress-core:0.7"
 }
 tasks.check.dependsOn(tasks.jcstress)
 

reactor-test/build.gradle

@@ -55,7 +55,7 @@ task downloadBaseline(type: Download) {
 	onlyIfNewer true
 	compress true
 
-	src "${repositories.jcenter().url}io/projectreactor/reactor-test/$compatibleVersion/reactor-test-${compatibleVersion}.jar"
+	src "${repositories.mavenCentral().url}io/projectreactor/reactor-test/$compatibleVersion/reactor-test-${compatibleVersion}.jar"
 	dest "${buildDir}/baselineLibs/reactor-test-${compatibleVersion}.jar"
 
 	finalizedBy { japicmp }