Adding Jakarta support (#372)

* Adding Jakarta support

aws-xray-recorder-sdk-core/build.gradle.kts

@@ -8,6 +8,7 @@ dependencies {
 
     compileOnly("com.google.code.findbugs:jsr305:3.0.2")
     compileOnly("javax.servlet:javax.servlet-api:3.1.0")
+    compileOnly("jakarta.servlet:jakarta.servlet-api:5.0.0")
 
     testImplementation("com.fasterxml.jackson.datatype:jackson-datatype-jsr310")
     testImplementation("com.github.stefanbirkner:system-rules:1.16.0")
@@ -16,6 +17,7 @@ dependencies {
     testImplementation("org.powermock:powermock-module-junit4:2.0.7")
     testImplementation("org.powermock:powermock-api-mockito2:2.0.7")
     testImplementation("org.skyscreamer:jsonassert:1.3.0")
+    testImplementation("jakarta.servlet:jakarta.servlet-api:5.0.0")
 }
 
 tasks.jar {

aws-xray-recorder-sdk-core/src/main/java/com/amazonaws/xray/jakarta/servlet/AWSXRayServletAsyncListener.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+package com.amazonaws.xray.jakarta.servlet;
+
+import com.amazonaws.xray.AWSXRayRecorder;
+import com.amazonaws.xray.entities.Entity;
+import jakarta.servlet.AsyncEvent;
+import jakarta.servlet.AsyncListener;
+import java.io.IOException;
+import org.checkerframework.checker.initialization.qual.UnderInitialization;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+class AWSXRayServletAsyncListener implements AsyncListener {
+
+    public static final String ENTITY_ATTRIBUTE_KEY = "com.amazonaws.xray.entities.Entity";
+
+    @Nullable
+    private AWSXRayRecorder recorder;
+    private final AWSXRayServletFilter filter;
+
+    // TODO(anuraaga): Better define lifecycle relationship between this listener and the filter.
+    @SuppressWarnings("nullness")
+    AWSXRayServletAsyncListener(@UnderInitialization AWSXRayServletFilter filter, @Nullable AWSXRayRecorder recorder) {
+        this.filter = filter;
+        this.recorder = recorder;
+    }
+
+    private void processEvent(AsyncEvent event) throws IOException {
+        Entity entity = (Entity) event.getSuppliedRequest().getAttribute(ENTITY_ATTRIBUTE_KEY);
+        entity.run(() -> {
+            if (event.getThrowable() != null) {
+                entity.addException(event.getThrowable());
+            }
+            filter.postFilter(event.getSuppliedRequest(), event.getSuppliedResponse());
+        });
+    }
+
+    @Override
+    public void onComplete(AsyncEvent event) throws IOException {
+        processEvent(event);
+    }
+
+    @Override
+    public void onTimeout(AsyncEvent event) throws IOException {
+        processEvent(event);
+    }
+
+    @Override
+    public void onError(AsyncEvent event) throws IOException {
+        processEvent(event);
+    }
+
+    @Override
+    public void onStartAsync(AsyncEvent event) throws IOException {
+    }
+}