fix: Add nooargs constructors so we work in Jakarta

Author: kabir

extras/queue-manager-replicated/core/src/main/java/io/a2a/extras/queuemanager/replicated/core/ReplicatedQueueManager.java

@@ -30,6 +30,17 @@ public class ReplicatedQueueManager implements QueueManager {
 
     private TaskStateProvider taskStateProvider;
 
+    /**
+     * No-args constructor for CDI proxy creation.
+     */
+    @SuppressWarnings("NullAway")
+    protected ReplicatedQueueManager() {
+        // For CDI proxy creation
+        this.delegate = null;
+        this.replicationStrategy = null;
+        this.taskStateProvider = null;
+    }
+
     @Inject
     public ReplicatedQueueManager(ReplicationStrategy replicationStrategy, TaskStateProvider taskStateProvider) {
         this.replicationStrategy = replicationStrategy;

server-common/src/main/java/io/a2a/server/events/InMemoryQueueManager.java

@@ -19,6 +19,16 @@ public class InMemoryQueueManager implements QueueManager {
     private final EventQueueFactory factory;
     private final TaskStateProvider taskStateProvider;
 
+    /**
+     * No-args constructor for CDI proxy creation.
+     */
+    @SuppressWarnings("NullAway")
+    protected InMemoryQueueManager() {
+        // For CDI proxy creation
+        this.factory = null;
+        this.taskStateProvider = null;
+    }
+
     @Inject
     public InMemoryQueueManager(TaskStateProvider taskStateProvider) {
         this.factory = new DefaultEventQueueFactory();

server-common/src/main/java/io/a2a/server/requesthandlers/DefaultRequestHandler.java

@@ -220,6 +220,23 @@ public class DefaultRequestHandler implements RequestHandler {
 
     private final Executor executor;
 
+    /**
+     * No-args constructor for CDI proxy creation.
+     * CDI requires a non-private constructor to create proxies for @ApplicationScoped beans.
+     * All fields are initialized by the @Inject constructor during actual bean creation.
+     */
+    @SuppressWarnings("NullAway")
+    protected DefaultRequestHandler() {
+        // For CDI proxy creation
+        this.agentExecutor = null;
+        this.taskStore = null;
+        this.queueManager = null;
+        this.pushConfigStore = null;
+        this.pushSender = null;
+        this.requestContextBuilder = null;
+        this.executor = null;
+    }
+
     @Inject
     public DefaultRequestHandler(AgentExecutor agentExecutor, TaskStore taskStore,
                                  QueueManager queueManager, PushNotificationConfigStore pushConfigStore,

server-common/src/main/java/io/a2a/server/tasks/BasePushNotificationSender.java

@@ -30,6 +30,16 @@ public class BasePushNotificationSender implements PushNotificationSender {
     private final A2AHttpClient httpClient;
     private final PushNotificationConfigStore configStore;
 
+    /**
+     * No-args constructor for CDI proxy creation.
+     */
+    @SuppressWarnings("NullAway")
+    protected BasePushNotificationSender() {
+        // For CDI proxy creation
+        this.httpClient = null;
+        this.configStore = null;
+    }
+
     @Inject
     public BasePushNotificationSender(PushNotificationConfigStore configStore) {
         this.httpClient = new JdkA2AHttpClient();

transport/jsonrpc/src/main/java/io/a2a/transport/jsonrpc/handler/JSONRPCHandler.java

@@ -65,6 +65,15 @@ public class JSONRPCHandler {
     private RequestHandler requestHandler;
     private final Executor executor;
 
+    @SuppressWarnings("NullAway")
+    protected JSONRPCHandler() {
+        // For CDI proxy creation
+        this.agentCard = null;
+        this.extendedAgentCard = null;
+        this.requestHandler = null;
+        this.executor = null;
+    }
+
     @Inject
     public JSONRPCHandler(@PublicAgentCard AgentCard agentCard, @Nullable @ExtendedAgentCard Instance<AgentCard> extendedAgentCard,
                           RequestHandler requestHandler, @Internal Executor executor) {