Add support for building on Java 11

.github/workflows/maven.yml

@@ -11,19 +11,23 @@ on:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
-
+    strategy:
+      fail-fast: true
+      matrix:
+        java-version:
+          - 8
+          - 11
     steps:
     - uses: actions/checkout@v4
       with: 
         show-progress: false
         # needed for the git-commit-id-plugin to work
         fetch-depth: 0
-    - name: Set up JDK 8
-      uses: actions/setup-java@v3
+    - name: Set up JDK
+      uses: actions/setup-java@v4
       with:
-        java-version: '8'
+        java-version: ${{ matrix.java-version }}
         distribution: 'temurin'
         cache: maven
     - name: Maven verify

jmx/src/main/java/com/facebook/airlift/jmx/JmxAgent8.java

@@ -18,7 +18,6 @@
 import com.facebook.airlift.log.Logger;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.net.HostAndPort;
-import sun.management.Agent;
 import sun.management.jmxremote.ConnectorBootstrap;
 import sun.rmi.server.UnicastRef;
 
@@ -41,6 +40,8 @@ class JmxAgent8
 {
     private static final Logger log = Logger.get(JmxAgent.class);
 
+    private static final Class<?> AGENT_CLASS = getAgentClass();
+
     private final JMXServiceURL url;
 
     @Inject
@@ -76,7 +77,7 @@ public JmxAgent8(JmxConfig config)
             System.setProperty("com.sun.management.jmxremote.ssl", "false");
 
             try {
-                Agent.startAgent();
+                AGENT_CLASS.getMethod("startAgent").invoke(null);
             }
             catch (Exception e) {
                 throwIfUnchecked(e);
@@ -111,7 +112,7 @@ static HostAndPort getRunningAgentAddress(Integer registryPort, Integer serverPo
         RemoteObject registry;
         int actualRegistryPort;
         try {
-            jmxServer = getField(Agent.class, JMXConnectorServer.class, "jmxServer");
+            jmxServer = getField(AGENT_CLASS, JMXConnectorServer.class, "jmxServer");
             registry = getField(ConnectorBootstrap.class, RemoteObject.class, "registry");
 
             if (jmxServer == null || registry == null) {
@@ -160,4 +161,14 @@ private static <T> T getField(Class<?> clazz, Class<T> returnType, String name)
             throw new IllegalArgumentException(format("Field %s in class %s is not of type %s, actual: %s", name, clazz.getName(), returnType.getName(), field.getType().getName()), e);
         }
     }
+
+    private static Class<?> getAgentClass()
+    {
+        try {
+            return Class.forName("sun.management.Agent");
+        }
+        catch (ClassNotFoundException e) {
+            throw new RuntimeException(e);
+        }
+    }
 }

stats/pom.xml

@@ -52,6 +52,11 @@
             <artifactId>jackson-annotations</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>javax.annotation</groupId>
+            <artifactId>javax.annotation-api</artifactId>
+        </dependency>
+
         <dependency>
             <groupId>com.google.code.findbugs</groupId>
             <artifactId>jsr305</artifactId>