test: e2e tests with java 21

.github/workflows/run-e2e-tests.yml

@@ -32,13 +32,19 @@ jobs:
   e2e:
     runs-on: ubuntu-latest
     strategy:
-      max-parallel: 3
+      max-parallel: 4
       matrix:
-        java: [ 8, 11, 17 ]
+        java: [ 8, 11, 17, 21 ]
     name: End-to-end tests java${{ matrix.java }}
     env:
-      JAVA_VERSION: ${{ matrix.java }}
       AWS_DEFAULT_REGION: eu-west-1
+
+      # If matrix.version is 21, use 17, otherwise use matrix.version
+      # This is because AspectJ does not yet support weaving with Java21; we want
+      # to test the Java21 runtime, but we can't yet use the JDK21 compiler.
+      # https://github.com/eclipse-aspectj/aspectj/issues/260#issuecomment-1815920274
+      JAVA_VERSION: ${{ (matrix.java == 21 && '17') || matrix.java }}
+      JAVA_LAMBDA_RUNTIME_VERSION: ${{ matrix.java }}
     permissions:
       id-token: write # needed to interact with GitHub's OIDC Token endpoint.
       contents: read
@@ -48,7 +54,8 @@ jobs:
         uses: actions/setup-java@5ffc13f4174014e2d4d4572b3d74c3fa61aeb2c2 # v3.11.0
         with:
           distribution: 'corretto'
-          java-version: ${{ matrix.java }}
+          # See comment above on JAVA_VERSION env var
+          java-version: ${{ (matrix.java == 21 && '17') || matrix.java }}
           cache: maven
       - name: Setup AWS credentials
         uses: aws-actions/configure-aws-credentials@5fd3084fc36e372ff1fff382a39b10d03659f355 # v2.2.0

README.md

@@ -9,6 +9,16 @@ Powertools for AWS Lambda (Java) is a developer toolkit to implement Serverless
 
 **[📜Documentation](https://docs.powertools.aws.dev/lambda-java/)** | **[Feature request](https://github.com/aws-powertools/powertools-lambda-java/issues/new?assignees=&labels=feature-request%2C+triage&template=feature_request.md&title=)** | **[🐛Bug Report](https://github.com/aws-powertools/powertools-lambda-java/issues/new?assignees=&labels=bug%2C+triage&template=bug_report.md&title=)** | **[Detailed blog post](https://aws.amazon.com/blogs/opensource/simplifying-serverless-best-practices-with-aws-lambda-powertools-java/)**
 
+### Java Compatibility
+Powertools for AWS Lambda (Java) supports all Java version from 8 up to 21 as well as the 
+[corresponding Lambda runtimes](https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html). 
+
+Note: [AspectJ does not yet support Java 21](https://github.com/eclipse-aspectj/aspectj/issues/260). 
+With Java 21, you can use Powertools features that do not need AspectJ such as 
+[Batch Processing](https://docs.powertools.aws.dev/lambda-java/guides/batch-processing.html) as you normally would. 
+If you need aspect features you should use the JDK 17 compiler and target either the Java 17 or Java 21
+runtimes at deployment Lambda. 
+
 ### Installation
 
 Powertools for AWS Lambda (Java) is available in Maven Central. You can use your favourite dependency management tool to install it

powertools-e2e-tests/pom.xml

@@ -31,7 +31,7 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <constructs.version>10.3.0</constructs.version>
-        <cdk.version>2.100.0</cdk.version>
+        <cdk.version>2.109.0</cdk.version>
     </properties>
 
     <dependencies>

powertools-e2e-tests/src/test/java/software/amazon/lambda/powertools/testutils/Infrastructure.java

@@ -114,6 +114,7 @@ public class Infrastructure {
     private final String queue;
     private final String kinesisStream;
     private final String largeMessagesBucket;
+    private final JavaRuntime lambdaRuntimeVersion;
     private String ddbStreamsTableName;
     private String functionName;
     private Object cfnTemplate;
@@ -124,6 +125,7 @@ private Infrastructure(Builder builder) {
         this.tracing = builder.tracing;
         this.envVar = builder.environmentVariables;
         this.runtime = builder.runtime;
+        this.lambdaRuntimeVersion = builder.lambdaRuntimeVersion;
         this.timeout = builder.timeoutInSeconds;
         this.pathToFunction = builder.pathToFunction;
         this.idempotencyTable = builder.idemPotencyTable;
@@ -204,6 +206,7 @@ public void destroy() {
     private Stack createStackWithLambda() {
         boolean createTableForAsyncTests = false;
         Stack stack = new Stack(app, stackName);
+
         List<String> packagingInstruction = Arrays.asList(
                 "/bin/sh",
                 "-c",
@@ -247,7 +250,7 @@ private Stack createStackWithLambda() {
                 .handler("software.amazon.lambda.powertools.e2e.Function::handleRequest")
                 .memorySize(1024)
                 .timeout(Duration.seconds(timeout))
-                .runtime(runtime.getCdkRuntime())
+                .runtime(lambdaRuntimeVersion.getCdkRuntime())
                 .environment(envVar)
                 .tracing(tracing ? Tracing.ACTIVE : Tracing.DISABLED)
                 .build();
@@ -504,29 +507,34 @@ public static class Builder {
         private String queue;
         private String kinesisStream;
         private String ddbStreamsTableName;
+        private JavaRuntime lambdaRuntimeVersion;
 
         private Builder() {
-            getJavaRuntime();
+            runtime = mapRuntimeVersion("JAVA_VERSION");
+            lambdaRuntimeVersion = mapRuntimeVersion("JAVA_LAMBDA_RUNTIME_VERSION");
         }
 
-        /**
-         * Retrieve the java runtime to use for the lambda function.
-         */
-        private void getJavaRuntime() {
-            String javaVersion = System.getenv("JAVA_VERSION"); // must be set in GitHub actions
+
+
+        private JavaRuntime mapRuntimeVersion(String environmentVariableName) {
+            String javaVersion = System.getenv(environmentVariableName); // must be set in GitHub actions
+            JavaRuntime ret = null;
             if (javaVersion == null) {
-                throw new IllegalArgumentException("JAVA_VERSION is not set");
+                throw new IllegalArgumentException("JAVA_LAMBDA_RUNTIME_VERSION is not set");
             }
             if (javaVersion.startsWith("8")) {
-                runtime = JavaRuntime.JAVA8AL2;
+                ret = JavaRuntime.JAVA8AL2;
             } else if (javaVersion.startsWith("11")) {
-                runtime = JavaRuntime.JAVA11;
+                ret = JavaRuntime.JAVA11;
             } else if (javaVersion.startsWith("17")) {
-                runtime = JavaRuntime.JAVA17;
+                ret = JavaRuntime.JAVA17;
+            } else if (javaVersion.startsWith("21")) {
+                ret = JavaRuntime.JAVA21;
             } else {
                 throw new IllegalArgumentException("Unsupported Java version " + javaVersion);
             }
-            LOG.debug("Java Version set to {}, using runtime {}", javaVersion, runtime.getRuntime());
+            LOG.debug("Java Version set to {}, using runtime variable {}", ret, javaVersion);
+            return ret;
         }
 
         public Infrastructure build() {

powertools-e2e-tests/src/test/java/software/amazon/lambda/powertools/testutils/JavaRuntime.java

@@ -20,7 +20,8 @@ public enum JavaRuntime {
     JAVA8("java8", Runtime.JAVA_8, "1.8"),
     JAVA8AL2("java8.al2", Runtime.JAVA_8_CORRETTO, "1.8"),
     JAVA11("java11", Runtime.JAVA_11, "11"),
-    JAVA17("java17", Runtime.JAVA_17, "17");
+    JAVA17("java17", Runtime.JAVA_17, "17"),
+    JAVA21("java21", Runtime.JAVA_21, "21");
 
     private final String runtime;
     private final Runtime cdkRuntime;