OPENJPA-2819 Add simple GitHub Actions validation for Pull Requests

.github/workflows/pr-validation.yml

@@ -0,0 +1,42 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more contributor
+# license agreements.  See the NOTICE file distributed with this work for additional
+# information regarding copyright ownership.  The ASF licenses this file to you
+# 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:
+#
+# http://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.
+#
+name: Java CI
+
+on:
+  pull_request:
+    branches: [ $default-branch ]
+
+env:
+  MAVEN_OPTS: -Dmaven.artifact.threads=256 -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up JDK 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+     - name: Cache Maven packages
+       uses: actions/cache@v2
+       with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2
+      - name: Build with Maven
+        run: mvn -B package --file pom.xml