[Issue-556] Drop support for Scala 2.11 (#568)

Signed-off-by: thekingofcity <[email protected]>

Author: thekingofcity

.github/workflows/build.yml

@@ -52,46 +52,8 @@ jobs:
       - name: Build via Gradle
         run: ./gradlew clean build
 
-  build_with_scala_211:
-    name: Build with Scala 2.11
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          # see comments above
-          fetch-depth: 0
-
-      - name: Set up JDK 11
-        uses: actions/setup-java@v1
-        with:
-          java-version: '11' # major or semver Java version will be acceptable, see https://github.com/marketplace/actions/setup-java-jdk#basic
-          java-package: jdk  # (jre, jdk, or jdk+fx) - defaults to jdk
-          architecture: x64  # (x64 or x86) - defaults to x64
-
-        # see comments above
-      - name: Cache gradle modules
-        uses: actions/cache@v2
-        with:
-          path: |
-            .gradle
-            $HOME/.gradle
-            $HOME/.m2
-          key: ${{ runner.os }}-gradle-scala211-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
-
-        # see comments above
-      - name: Cache build outputs
-        uses: actions/cache@v2
-        with:
-          path: ./*
-          key: scala211-${{ github.run_id }}
-
-      - name: Grant execute permission for gradlew
-        run: chmod +x gradlew
-
-      - name: Build via Gradle with Scala 2.11
-        run: |
-          ./gradlew clean build -PflinkScalaVersion=2.11
-          bash <(curl -s https://codecov.io/bash) -t 9c42ff48-d98f-4444-af05-cf734aa1dbd0
+      - name: Report to Codecov
+        run: bash <(curl -s https://codecov.io/bash) -t 9c42ff48-d98f-4444-af05-cf734aa1dbd0
 
   snapshot:
     name: Publish snapshot to Github Packages
@@ -103,7 +65,7 @@ jobs:
       BINTRAY_USER: ${{ secrets.BINTRAY_USER }}
       BINTRAY_KEY: ${{ secrets.BINTRAY_KEY }}
     steps:
-        # see comments above
+        # gradle packages that need to be cached
       - name: Cache gradle modules
         uses: actions/cache@v2
         with:
@@ -113,7 +75,7 @@ jobs:
             $HOME/.m2
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
 
-        # see comments above
+        # publish the artifact from the build cache
       - name: Cache build outputs
         uses: actions/cache@v2
         with:
@@ -122,33 +84,3 @@ jobs:
 
       - name: Publish to Github Packages
         run: ./gradlew publish -PpublishUrl=https://maven.pkg.github.com/${{github.repository}} -PpublishUsername=${{github.actor}} -PpublishPassword=${{secrets.GITHUB_TOKEN}}
-
-  snapshot_with_scala_211:
-    name: Publish snapshot to Github Packages with Scala 2.11
-    needs: [build_with_scala_211]
-    runs-on: ubuntu-latest
-    # only publish the snapshot when it is a push on the master or the release branch (starts with r0.x or r1.x)
-    if: ${{ github.event_name == 'push' && (github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/heads/r0.') || startsWith(github.ref, 'refs/heads/r1.')) }}
-    env:
-      BINTRAY_USER: ${{ secrets.BINTRAY_USER }}
-      BINTRAY_KEY: ${{ secrets.BINTRAY_KEY }}
-    steps:
-        # see comments above
-      - name: Cache gradle modules
-        uses: actions/cache@v2
-        with:
-          path: |
-            .gradle
-            $HOME/.gradle
-            $HOME/.m2
-          key: ${{ runner.os }}-gradle-scala211-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
-
-        # see comments above
-      - name: Cache build outputs
-        uses: actions/cache@v2
-        with:
-          path: ./*
-          key: scala211-${{ github.run_id }}
-
-      - name: Publish to Github Packages with Scala 2.11
-        run: ./gradlew publish -PpublishUrl=https://maven.pkg.github.com/${{github.repository}} -PpublishUsername=${{github.actor}} -PpublishPassword=${{secrets.GITHUB_TOKEN}} -PflinkScalaVersion=2.11

documentation/src/docs/dev-guide.md

@@ -31,8 +31,8 @@ However, you can go straight to the completed example at [flink-connector-exampl
 # Starting Flink
 Download Flink release and un-tar it. We use Flink 1.11.2 here. 
 ```
-$ tar -xzf flink-1.11.2-bin-scala_2.11.tgz
-$ cd flink-1.11.2-bin-scala_2.11
+$ tar -xzf flink-1.11.2-bin-scala_2.12.tgz
+$ cd flink-1.11.2-bin-scala_2.12
 ```
 Start a cluster
 ```

documentation/src/docs/getting-started.md

@@ -9,7 +9,7 @@ You may obtain a copy of the License at
 -->
 # Pravega Flink Connectors [![Build Status](https://travis-ci.org/pravega/flink-connectors.svg?branch=master)](https://travis-ci.org/pravega/flink-connectors)
 
-This repository implements  connectors to read and write [Pravega](http://pravega.io/) Streams with [Apache Flink](http://flink.apache.org/) stream processing framework.
+This repository implements connectors to read and write [Pravega](http://pravega.io/) Streams with [Apache Flink](http://flink.apache.org/) stream processing framework.
 
 The connectors can be used to build end-to-end stream processing pipelines (see [Samples](https://github.com/pravega/pravega-samples)) that use Pravega as the stream storage and message bus, and Apache Flink for computation over the streams.