Created github action workflow for deployment on cse3310 VPS

.github/workflows/static.yml

@@ -1,43 +1,74 @@
-# Simple workflow for deploying static content to GitHub Pages
-name: Deploy static content to Pages
-
-on:
-  # Runs on pushes targeting the default branch
-  push:
-    branches: ["main"]
-
-  # Allows you to run this workflow manually from the Actions tab
-  workflow_dispatch:
-
-# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
-permissions:
-  contents: read
-  pages: write
-  id-token: write
-
-# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
-# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
-concurrency:
-  group: "pages"
-  cancel-in-progress: false
-
+# Derived from an example provided by https://blog.benoitblanchon.fr/github-action-run-ssh-commands/
+#                                     https://github.blog/2015-06-16-read-only-deploy-keys/
+#
+#
+#
+#
+#
+name: Deploy
+on: [push]
 jobs:
-  # Single deploy job since we're just deploying
   deploy:
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
+    name: "Deploy to server"
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Setup Pages
-        uses: actions/configure-pages@v4
-      - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
-        with:
-          # Upload entire repository
-          path: '.'
-      - name: Deploy to GitHub Pages
-        id: deployment
-        uses: actions/deploy-pages@v4
+      - name: configure SSH
+        run: |
+          # These are very useful for debugging
+          echo "Repository = ${{ github.repository }}"
+          echo "github url = ${{ github.server_url }}"
+          echo "Owner =  ${{ github.repository_owner }}"
+          echo "Repository name = ${{ github.event.repository.name }}"
+          echo "Service name = ${{ vars.service_name }}"
+          echo "http port = ${{ vars.http_port }}"
+          echo "websocket port = ${{ vars.websocket_port }}"
+          echo "version = $${ github.sha }}"
+          # On to the work at hand.
+          mkdir -p ~/.ssh/
+          echo "${{ secrets.SSH_PRIVATE_KEY }}" > ~/.ssh/production.key
+          chmod 600 ~/.ssh/production.key
+          cat >>~/.ssh/config <<END
+          Host production
+            HostName ${{ secrets.SSH_HOST }}
+            User ${{ secrets.SSH_USER }}
+            IdentityFile ~/.ssh/production.key
+            StrictHostKeyChecking no
+          END
+                         
+      - name: get source code and compile
+        run: |
+          echo "deleting the directory ${{ github.event.repository.name }} "
+          ssh production "rm -rf  ${{ github.event.repository.name }}"
+          echo "cloning  ${{ github.server_url }}/${{ github.repository }}"
+          ssh production "git clone ${{ github.server_url }}/${{ github.repository }}"
+          ssh production "cd  ${{ github.event.repository.name }};mvn clean compile package"
+        
+      - name: create systemd unit file
+        run: |
+           # without enable-linger, you must be logged in. So, we enable it.
+           ssh production "loginctl enable-linger"
+           ssh production "mkdir --parents .config/systemd/user"
+           ssh production "rm -f .config/systemd/user/${{ vars.service_name }}.service"
+           ssh production 'echo "[Unit]" >> .config/systemd/user/${{ vars.service_name }}.service'
+           ssh production 'echo "Description=${{ vars.service_name }}" >> .config/systemd/user/${{ vars.service_name }}.service'
+           ssh production 'echo "[Service]" >> .config/systemd/user/${{ vars.service_name }}.service'
+           ssh production 'echo "Type=simple" >> .config/systemd/user/${{ vars.service_name }}.service'
+           ssh production 'echo "Restart=always" >> .config/systemd/user/${{ vars.service_name }}.service'
+           ssh production 'echo "RestartSec=5" >> .config/systemd/user/${{ vars.service_name }}.service'
+           ssh production 'echo "Environment=VERSION=\"${{ github.sha }}\"" >>.config/systemd/user/${{ vars.service_name }}.service'
+           ssh production 'echo "Environment=WEBSOCKET_PORT=${{ vars.websocket_port }}" >>.config/systemd/user/${{ vars.service_name }}.service'
+           ssh production 'echo "Environment=HTTP_PORT=${{ vars.http_port }}" >>.config/systemd/user/${{ vars.service_name }}.service'
+           ssh production 'echo "ExecStart=mvn exec:java -Dexec.mainClass=uta.cse3310.App" >> .config/systemd/user/${{ vars.service_name }}.service'
+           ssh production 'echo "WorkingDirectory=$PWD/${{ github.event.repository.name }}" >> .config/systemd/user/${{ vars.service_name }}.service'
+           ssh production 'echo "[Install]" >>.config/systemd/user/${{ vars.service_name }}.service'
+           ssh production 'echo "WantedBy=default.target" >>.config/systemd/user/${{ vars.service_name }}.service'
+      - name: systemd reload
+        run: |
+            ssh production "systemctl --user daemon-reload"
+           
+      - name: restart daemon
+        run: |
+           ssh production "systemctl --user enable  ${{ vars.service_name }}"
+           ssh production "systemctl --user restart ${{ vars.service_name }}"
+           ssh production "systemctl --user status  ${{ vars.service_name }}"
+           

src/main/java/com/cse3310/App.java

@@ -92,17 +92,22 @@ public void onStart() {
 
     public static void main(String[] args) {
         // Set up the http server
-        String envPort = System.getenv("HTTP_PORT");
-        int httpPort = Integer.parseInt(envPort);
-        HttpServer H = new HttpServer(httpPort, "./html");
-        H.start();
-        System.out.println("http Server started on port:" + httpPort);
-
-        // create and start the websocket server
-        envPort = System.getenv("WEBSOCKET_PORT");
-        int socketPort = Integer.parseInt("envPort");
-        App A = new App(socketPort);
-        A.start();
-        System.out.println("websocket Server started on port: " + socketPort);
+        try{
+            String envPort = System.getenv("HTTP_PORT");
+            int httpPort = Integer.parseInt(envPort);
+            HttpServer H = new HttpServer(httpPort, "./html");
+            H.start();
+            System.out.println("http Server started on port:" + httpPort);
+
+            // create and start the websocket server
+            envPort = System.getenv("WEBSOCKET_PORT");
+            int socketPort = Integer.parseInt("envPort");
+            App A = new App(socketPort);
+            A.start();
+            System.out.println("websocket Server started on port: " + socketPort);
+        }
+        catch (NullPointerException e){ // Checks for environment variable
+            e.printStackTrace();
+        }
     }
 }