[java] Add social login example

examples/java/java-social_login-01_base/.editorconfig

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+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.java]
+indent_size = 4
+indent_style = space

examples/java/java-social_login-01_base/.github/workflows/workflow.yml

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+name: Main Workflow
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - uses: actions/setup-java@v1
+      with:
+        java-version: 11
+
+    - name: Assemble
+      run: ./gradlew assemble --warning-mode all
+
+    - name: Check
+      run: ./gradlew check --warning-mode all
+

examples/java/java-social_login-01_base/.gitignore

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+# Gradle
+.gradle
+build/
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+var/log/*
+!var/log/.gitkeep

examples/java/java-social_login-01_base/Makefile

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+.PONY: all build test
+
+all: build
+
+build:
+	@./gradlew assemble --warning-mode all
+
+test:
+	@./gradlew check --warning-mode all

examples/java/java-social_login-01_base/README.md

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+# ☕🚀 Java Basic Skeleton: Save the boilerplate in your new projects
+
+<img src="http://codely.tv/wp-content/uploads/2016/05/cropped-logo-codelyTV.png" align="left" width="192px" height="192px"/>
+<img align="left" width="0" height="192px" hspace="10"/>
+
+> ⚡ Start your Java projects as fast as possible
+
+[![CodelyTV](https://img.shields.io/badge/codely-tv-green.svg?style=flat-square)](https://codely.tv)
+[![Workflow Status](https://github.com/CodelyTV/java-basic-skeleton/workflows/Main%20Workflow/badge.svg)](https://github.com/CodelyTV/java-basic-skeleton/actions)
+
+## ℹ️ Introduction
+
+This is a repository intended to serve as a starting point if you want to bootstrap a Java project with JUnit and Gradle.
+
+## 🏁 How To Start
+
+1. Install Java 11: `brew cask install corretto` or download it [here](https://docs.aws.amazon.com/corretto/latest/corretto-11-ug/downloads-list.html)
+2. Set it as your default JVM: `export JAVA_HOME='/Library/Java/JavaVirtualMachines/amazon-corretto-11.jdk/Contents/Home'`
+3. Clone this repository: `git clone https://github.com/CodelyTV/java-basic-skeleton`.
+4. Execute some [Gradle lifecycle tasks](https://docs.gradle.org/current/userguide/java_plugin.html#lifecycle_tasks) in order to check everything is OK:
+    1. Create [the project JAR](https://docs.gradle.org/current/userguide/java_plugin.html#sec:jar): `make build`
+    2. Run the tests and plugins verification tasks: `make test`
+5. Start developing!
+
+## ☝️ How to update dependencies
+
+* Gradle (current version: 5.6 - [releases](https://gradle.org/releases/)):
+`./gradlew wrapper --gradle-version=5.6 --distribution-type=bin` or modifying the [gradle-wrapper.properties](gradle/wrapper/gradle-wrapper.properties#L3)
+* JUnit (current version: 5.5.1 - [releases](https://junit.org/junit5/docs/snapshot/release-notes/index.html)):
+[`build.gradle:11`](build.gradle#L11-L12)
+
+## 💡 Related repositories
+
+### ☕ Java
+
+* 📂 [Java Basic Skeleton](https://github.com/CodelyTV/java-basic-skeleton)
+* ⚛ [Java OOP Examples](https://github.com/CodelyTV/java-oop-examples)
+* 🧱 [Java SOLID Examples](https://github.com/CodelyTV/java-solid-examples)
+* 🥦 [Java DDD Example](https://github.com/CodelyTV/java-ddd-example)
+
+### 🐘 PHP
+
+* 📂 [PHP Basic Skeleton](https://github.com/CodelyTV/php-basic-skeleton)
+* 🎩 [PHP DDD Skeleton](https://github.com/CodelyTV/php-ddd-skeleton)
+* 🥦 [PHP DDD Example](https://github.com/CodelyTV/php-ddd-example)
+
+### 🧬 Scala
+
+* 📂 [Scala Basic Skeleton](https://github.com/CodelyTV/scala-basic-skeleton)
+* ⚡ [Scala Basic Skeleton (g8 template)](https://github.com/CodelyTV/scala-basic-skeleton.g8)
+* ⚛ [Scala Examples](https://github.com/CodelyTV/scala-examples)
+* 🥦 [Scala DDD Example](https://github.com/CodelyTV/scala-ddd-example)

examples/java/java-social_login-01_base/build.gradle

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+apply plugin: 'java'
+
+sourceCompatibility = 11
+targetCompatibility = 11
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'org.apache.logging.log4j:log4j-core:2.12.1'
+    implementation 'com.vlkan.log4j2:log4j2-logstash-layout:0.19'
+
+    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.5.2'
+    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.5.2'
+}
+
+test {
+    useJUnitPlatform()
+
+    testLogging {
+        events "passed", "skipped", "failed"
+    }
+}

examples/java/java-social_login-01_base/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

examples/java/java-social_login-01_base/gradlew

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+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  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 "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+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, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$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`="\"$arg\""
+        fi
+        i=$((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"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"

examples/java/java-social_login-01_base/gradlew.bat

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+@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"
+
+@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