chore(ci): add check-spotless.yml GitHub workflow. (#33)

Author: phipag

.github/workflows/check-spotless.yml

@@ -0,0 +1,40 @@
+# Check for code formatting and license header errors using Spotless
+#
+# Description:
+#   Runs Spotless check for pull requests to ensure code formatting consistency,
+#   proper import ordering, and license headers.
+#   Fails the build if any violations are found.
+#
+# Triggers:
+#   - pull_request
+name: Spotless
+
+on:
+  pull_request:
+    branches:
+      - main
+    paths:
+      - 'sdk/**'
+      - 'sdk-testing/**'
+      - 'sdk-integration-tests/**'
+      - 'examples/**'
+
+permissions:
+  contents: read
+
+jobs:
+  spotless-check:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v5
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v5
+        with:
+          java-version: '17'
+          distribution: 'corretto'
+          cache: maven
+
+      - name: Run Spotless check
+        run: mvn -B -q spotless:check --file pom.xml

.github/workflows/sync-package.yml

@@ -35,10 +35,10 @@ jobs:
       - name: Git clone the repository
         uses: actions/checkout@v5
       - name: Set up JDK 17
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@v5
         with:
           java-version: '17'
-          distribution: 'temurin'
+          distribution: 'corretto'
           cache: maven
       - name: Get version
         id: get_version

sdk/src/main/java/com/amazonaws/lambda/durable/CallbackConfig.java

@@ -17,10 +17,20 @@ private CallbackConfig(Builder builder) {
         this.serDes = builder.serDes;
     }
 
+    /**
+     * Returns the maximum duration to wait for the callback to complete.
+     *
+     * @return the timeout duration, or null if not specified
+     */
     public Duration timeout() {
         return timeout;
     }
 
+    /**
+     * Returns the maximum duration between heartbeats before the callback is considered failed.
+     *
+     * @return the heartbeat timeout duration, or null if not specified
+     */
     public Duration heartbeatTimeout() {
         return heartbeatTimeout;
     }