12 files changed, 317 insertions, 22 deletions
diff --git a/demo_gradle/.gitignore b/demo_gradle/.gitignore
index ad93baf..12ddda9 100644
--- a/demo_gradle/.gitignore
+++ b/demo_gradle/.gitignore
@@ -1,4 +1,3 @@
 build
 .gradle
 .idea
-app/plugins/
diff --git a/demo_gradle/README.md b/demo_gradle/README.md
index 6851fc0..5c8bc80 100644
--- a/demo_gradle/README.md
+++ b/demo_gradle/README.md
@@ -6,7 +6,7 @@ This demo assumes that you know the basics of Gradle (Please look at [gradle](ht
 
 1. Clone the repo
 2. Go to demo_gradle `cd demo_gradle` 
-3. run `gradle build`
+3. run `./gradlew build`
 
 * This will produce one jar, named app-plugin-demo-uberjar.jar, located in the `app/build/libs/` directory and three plugins zips located in `build/plugins` directory.
 * The plugins are `plugin-hello-plugin-0.0.1.zip`,  `plugin-KotlinPlugin-1.0.0.zip` and `plugin-welcome-plugin-0.0.1.zip`
@@ -16,20 +16,20 @@ This demo assumes that you know the basics of Gradle (Please look at [gradle](ht
 1. Run 
 
 ```
- java -jar -Dpf4j.pluginsDir=build/plugins app/build/libs/app-plugin-demo-uberjar.jar 
+ ./gradlew app:run
 ```
 
-* pf4j.pluginsDir: is where the plugins are located
-
 2. The demo's output should look similar to: (Please see `Boot#main()` for more details)
 ```
-demo_gradle $ java -jar -Dpf4j.pluginsDir=build/plugins app/build/libs/app-plugin-demo-uberjar.jar 
 [main] INFO org.pf4j.demo.Boot - ########################################
-[main] INFO org.pf4j.demo.Boot -                PF4J-DEMO                
+[main] INFO org.pf4j.demo.Boot -                PF4J-DEMO
 [main] INFO org.pf4j.demo.Boot - ########################################
 [main] INFO org.pf4j.DefaultPluginStatusProvider - Enabled plugins: []
 [main] INFO org.pf4j.DefaultPluginStatusProvider - Disabled plugins: []
-[main] INFO org.pf4j.DefaultPluginManager - PF4J version 0.0.0 in 'deployment' mode
+[main] INFO org.pf4j.DefaultPluginManager - PF4J version 3.1.0 in 'deployment' mode
+[main] INFO org.pf4j.util.FileUtils - Expanded plugin zip 'plugin-hello-plugin-0.0.1.zip' in 'plugin-hello-plugin-0.0.1'
+[main] INFO org.pf4j.util.FileUtils - Expanded plugin zip 'plugin-KotlinPlugin-1.0.0.zip' in 'plugin-KotlinPlugin-1.0.0'
+[main] INFO org.pf4j.util.FileUtils - Expanded plugin zip 'plugin-welcome-plugin-0.0.1.zip' in 'plugin-welcome-plugin-0.0.1'
 [main] INFO org.pf4j.AbstractPluginManager - Plugin 'welcome-plugin@0.0.1' resolved
 [main] INFO org.pf4j.AbstractPluginManager - Plugin 'KotlinPlugin@1.0.0' resolved
 [main] INFO org.pf4j.AbstractPluginManager - Plugin 'hello-plugin@0.0.1' resolved
@@ -41,12 +41,13 @@ demo_gradle $ java -jar -Dpf4j.pluginsDir=build/plugins app/build/libs/app-plugi
 [main] INFO org.pf4j.demo.kotlin.KotlinPlugin - KOTLINPLUGIN
 [main] INFO org.pf4j.AbstractPluginManager - Start plugin 'hello-plugin@0.0.1'
 [main] INFO org.pf4j.demo.hello.HelloPlugin - HelloPlugin.start()
-[main] INFO org.pf4j.demo.Boot - Plugindirectory: 
-[main] INFO org.pf4j.demo.Boot - 	build/plugins
+[main] INFO org.pf4j.demo.Boot - Plugindirectory:
+[main] INFO org.pf4j.demo.Boot -        ../build/plugins
 
-[main] INFO org.pf4j.demo.Boot - Found 3 extensions for extension point 'org.pf4j.demo.api.Greeting'
+[main] INFO org.pf4j.demo.Boot - Found 4 extensions for extension point 'org.pf4j.demo.api.Greeting'
 [main] INFO org.pf4j.demo.Boot - >>> Whazzup
 [main] INFO org.pf4j.demo.Boot - >>> Welcome
+[main] INFO org.pf4j.demo.Boot - >>> KotlinGreetings
 [main] INFO org.pf4j.demo.Boot - >>> Hello
 [main] INFO org.pf4j.demo.Boot - Extensions added by plugin 'welcome-plugin':
 [main] INFO org.pf4j.demo.Boot - Extensions added by plugin 'KotlinPlugin':
@@ -57,6 +58,5 @@ demo_gradle $ java -jar -Dpf4j.pluginsDir=build/plugins app/build/libs/app-plugi
 [main] INFO org.pf4j.demo.kotlin.KotlinPlugin - KotlinPlugin.stop()
 [main] INFO org.pf4j.AbstractPluginManager - Stop plugin 'welcome-plugin@0.0.1'
 [main] INFO org.pf4j.demo.welcome.WelcomePlugin - WelcomePlugin.stop()
-
 ```
 
diff --git a/demo_gradle/app/build.gradle b/demo_gradle/app/build.gradle
index 4761092..85c2412 100644
--- a/demo_gradle/app/build.gradle
+++ b/demo_gradle/app/build.gradle
@@ -1,10 +1,14 @@
 apply plugin: 'application'
 
 mainClassName = 'org.pf4j.demo.Boot'
+run {
+  systemProperty 'pf4j.pluginsDir', '../build/plugins'
+}
 
 dependencies {
   compile project(':api')
   compile group: 'org.pf4j', name: 'pf4j', version: "${pf4jVersion}"
+  annotationProcessor(group: 'org.pf4j', name: 'pf4j', version: "${pf4jVersion}")
   compile group: 'org.apache.commons', name: 'commons-lang3', version: '3.5'
   compile group: 'org.slf4j', name: 'slf4j-simple', version: '1.7.25'
 
@@ -13,19 +17,19 @@ dependencies {
 
 task uberjar(type: Jar, dependsOn: ['compileJava']) {
   zip64 true
-  from configurations.runtime.asFileTree.files.collect {
+  from configurations.runtimeClasspath.asFileTree.files.collect {
     exclude "META-INF/*.SF"
     exclude "META-INF/*.DSA"
     exclude "META-INF/*.RSA"
     zipTree(it)
   }
-  from files(sourceSets.main.output.classesDir)
+  from files(sourceSets.main.output.classesDirs)
   from files(sourceSets.main.resources)
   manifest {
     attributes 'Main-Class': mainClassName
   }
 
-  baseName = "${project.name}-plugin-demo"
-  classifier = "uberjar"
+  archiveBaseName = "${project.name}-plugin-demo"
+  archiveClassifier = "uberjar"
 }
 
diff --git a/demo_gradle/gradle.properties b/demo_gradle/gradle.properties
index 177f36b..4000315 100644
--- a/demo_gradle/gradle.properties
+++ b/demo_gradle/gradle.properties
@@ -1,2 +1,2 @@
 # PF4J
-pf4jVersion=2.0.0
+pf4jVersion=3.1.0
diff --git a/demo_gradle/gradle/wrapper/gradle-wrapper.jar b/demo_gradle/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..cc4fdc2
--- /dev/null
+++ b/demo_gradle/gradle/wrapper/gradle-wrapper.jar
diff --git a/demo_gradle/gradle/wrapper/gradle-wrapper.properties b/demo_gradle/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..4aeeaec
--- /dev/null
+++ b/demo_gradle/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Thu Nov 14 12:06:04 CST 2019
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.0-all.zip
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStorePath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
diff --git a/demo_gradle/gradlew b/demo_gradle/gradlew
new file mode 100755
index 0000000..2fe81a7
--- /dev/null
+++ b/demo_gradle/gradlew
@@ -0,0 +1,183 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/demo_gradle/gradlew.bat b/demo_gradle/gradlew.bat
new file mode 100644
index 0000000..24467a1
--- /dev/null
+++ b/demo_gradle/gradlew.bat
@@ -0,0 +1,100 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/demo_gradle/plugins/build.gradle b/demo_gradle/plugins/build.gradle
index 104b17d..d27535b 100644
--- a/demo_gradle/plugins/build.gradle
+++ b/demo_gradle/plugins/build.gradle
@@ -3,20 +3,20 @@ subprojects {
     manifest {
       attributes 'Plugin-Class': "${pluginClass}",
           'Plugin-Id': "${pluginId}",
-          'Plugin-Version': "${version}",
+          'Plugin-Version': "${archiveVersion}",
           'Plugin-Provider': "${pluginProvider}"
     }
   }
 
   task plugin(type: Jar) {
-    baseName = "plugin-${pluginId}"
+    archiveBaseName = "plugin-${pluginId}"
     into('classes') {
       with jar
     }
     into('lib') {
       from configurations.compile
     }
-    extension('zip')
+    archiveExtension ='zip'
   }
 
   task assemblePlugin(type: Copy) {
diff --git a/demo_gradle/plugins/plugin1/build.gradle b/demo_gradle/plugins/plugin1/build.gradle
index 69791a7..f3f00a5 100644
--- a/demo_gradle/plugins/plugin1/build.gradle
+++ b/demo_gradle/plugins/plugin1/build.gradle
@@ -4,6 +4,7 @@ dependencies {
   compileOnly(group: 'org.pf4j', name: 'pf4j', version: "${pf4jVersion}") {
     exclude group: "org.slf4j"
   }
+  annotationProcessor(group: 'org.pf4j', name: 'pf4j', version: "${pf4jVersion}")
   compile group: 'org.apache.commons', name: 'commons-lang3', version: '3.5'
   testCompile group: 'junit', name: 'junit', version: '4.+'
 }
diff --git a/demo_gradle/plugins/plugin2/build.gradle b/demo_gradle/plugins/plugin2/build.gradle
index 69791a7..f3f00a5 100644
--- a/demo_gradle/plugins/plugin2/build.gradle
+++ b/demo_gradle/plugins/plugin2/build.gradle
@@ -4,6 +4,7 @@ dependencies {
   compileOnly(group: 'org.pf4j', name: 'pf4j', version: "${pf4jVersion}") {
     exclude group: "org.slf4j"
   }
+  annotationProcessor(group: 'org.pf4j', name: 'pf4j', version: "${pf4jVersion}")
   compile group: 'org.apache.commons', name: 'commons-lang3', version: '3.5'
   testCompile group: 'junit', name: 'junit', version: '4.+'
 }
diff --git a/demo_gradle/plugins/plugin3/build.gradle b/demo_gradle/plugins/plugin3/build.gradle
index c360e23..1860b61 100644
--- a/demo_gradle/plugins/plugin3/build.gradle
+++ b/demo_gradle/plugins/plugin3/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.1.2-2'
+  ext.kotlin_version = '1.3.50'
 
   repositories {
     mavenCentral()
@@ -21,8 +21,9 @@ dependencies {
   compileOnly(group: 'org.pf4j', name: 'pf4j', version: "${pf4jVersion}") {
     exclude group: "org.slf4j"
   }
+  kapt(group: 'org.pf4j', name: 'pf4j', version: "${pf4jVersion}")
   compile group: 'org.apache.commons', name: 'commons-lang3', version: '3.5'
-  compile "org.jetbrains.kotlin:kotlin-stdlib-jre8:$kotlin_version"
+  compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
 
   testCompile group: 'junit', name: 'junit', version: '4.+'
 }