Setup maven workflow actions on gitub

- Create maven.yml
- Create ubuntu-toolchains.xml

.github/ubuntu-toolchains.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF8"?>
+<toolchains xmlns="http://maven.apache.org/TOOLCHAINS/1.1.0"
+            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+            xsi:schemaLocation="http://maven.apache.org/TOOLCHAINS/1.1.0 http://maven.apache.org/xsd/toolchains-1.1.0.xsd">
+    <toolchain>
+        <type>jdk</type>
+        <provides>
+            <version>11</version>
+        </provides>
+        <configuration>
+            <jdkHome>${env.JAVA_HOME_11_X64}</jdkHome>
+        </configuration>
+    </toolchain>
+    <toolchain>
+        <type>jdk</type>
+        <provides>
+            <version>1.8</version>
+        </provides>
+        <configuration>
+            <jdkHome>${env.JAVA_HOME_8_X64}</jdkHome>
+        </configuration>
+    </toolchain>
+</toolchains>

.github/workflows/maven.yml

@@ -0,0 +1,40 @@
+name: Maven GH build
+
+on: [push]
+
+jobs:
+  build:
+    name: Java ${{ matrix.java }} build
+    runs-on: ubuntu-latest
+    strategy:
+      matrix: 
+        java: [ 8, 11 ]
+
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/cache@v1.1.0
+      with:
+        path: ~/.m2/repository
+        key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+        restore-keys: |
+          ${{ runner.os }}-maven-
+    - name: Set up JDK 11 for toolchains
+      uses: actions/setup-java@v1.3.0
+      with:
+        java-version: 11
+    - name: Set up JDK 8 for toolchains
+      uses: actions/setup-java@v1.3.0
+      with:
+        java-version: 8
+    - name: Set up JDK 
+      uses: actions/setup-java@v1.3.0
+      with:
+        java-version: ${{ matrix.java }}
+    - name: Inspect environment
+      run: |
+        set | grep JAVA
+    - name: Build with Maven
+      run: mvn -V -B -e package --global-toolchains .github/ubuntu-toolchains.xml
+    - name: Remove SNAPSHOT jars from repository
+      run: |
+        find ~/.m2/repository -name "*SNAPSHOT*" -type d | xargs rm -rf {}

pom.xml

@@ -416,4 +416,40 @@
             </plugin>
         </plugins>
     </reporting>
+    <profiles>
+        <profile>
+            <id>java11</id>
+            <activation>
+                <jdk>11</jdk>
+            </activation>
+            <properties>
+                <java.version>11</java.version>
+                <maven.compiler.source>${java.version}</maven.compiler.source>
+                <maven.compiler.target>${java.version}</maven.compiler.target>
+            </properties>
+            <build>
+                <plugins>
+                    <plugin>
+                        <artifactId>maven-enforcer-plugin</artifactId>
+                        <version>3.0.0-M3</version>
+                        <executions>
+                            <execution>
+                                <id>enforce-versions</id>
+                                <goals>
+                                    <goal>enforce</goal>
+                                </goals>
+                                <configuration>
+                                    <rules>
+                                        <requireMavenVersion>
+                                            <version>3.6.0</version>
+                                        </requireMavenVersion>
+                                    </rules>
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
 </project>