Consolidate GitHub Actions

Signed-off-by: David Venable <dlv@amazon.com>

.github/workflows/examples-trace-analytics.yml

@@ -1,7 +1,9 @@
 #
-# Builds the Trace Analytics Docker image.
+# Builds the Trace Analytics Docker image(s).
 # This will build the full Docker image for the sample-app which includes
 # Python applications and installing onto the base Docker image.
+# It also build the Java sample app and corresponding Docker image to
+# ensure those continue to build.
 #
 
 name: Trace Analytics Sample App
@@ -17,7 +19,7 @@ on:
   workflow_dispatch:
 
 jobs:
-  build:
+  docker-build:
     runs-on: ubuntu-latest
 
     steps:
@@ -28,3 +30,24 @@ jobs:
         run: |
           cd examples/trace-analytics-sample-app
           docker build -t sample-app sample-app
+
+  java-app-build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Set up JDK ${{ matrix.java }}
+        uses: actions/setup-java@v1
+        with:
+          java-version: ${{ matrix.java }}
+
+      - name: Checkout Data Prepper
+        uses: actions/checkout@v2
+
+      - name: Build Analytics Service
+        run: |
+          cd examples/trace-analytics-sample-app/sample-app/analytics-service
+          ./gradlew build
+
+      - name: Build Analytics Service Docker image
+        run: |
+          docker build -t analytics-service .