[java] Add social login example

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

@@ -0,0 +1,11 @@
+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

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+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