Expose the Jersey injection manager

aws-serverless-java-container-jersey/src/main/java/com/amazonaws/serverless/proxy/jersey/JerseyLambdaContainerHandler.java

@@ -34,6 +34,7 @@
 import com.amazonaws.services.lambda.runtime.Context;
 
 import org.glassfish.jersey.internal.inject.AbstractBinder;
+import org.glassfish.jersey.internal.inject.InjectionManager;
 import org.glassfish.jersey.process.internal.RequestScoped;
 import org.glassfish.jersey.server.ResourceConfig;
 
@@ -196,4 +197,12 @@ public void initialize() {
         Timer.stop("JERSEY_COLD_START_INIT");
         initialized = true;
     }
+
+
+    public InjectionManager getInjectionManager() {
+        if (!initialized) {
+            initialize();
+        }
+        return jerseyFilter.getApplicationHandler().getInjectionManager();
+    }
 }

aws-serverless-java-container-jersey/src/test/java/com/amazonaws/serverless/proxy/jersey/JerseyInjectionTest.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2016 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.serverless.proxy.jersey;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+
+import javax.inject.Singleton;
+
+import org.glassfish.jersey.internal.inject.AbstractBinder;
+import org.glassfish.jersey.media.multipart.MultiPartFeature;
+import org.glassfish.jersey.server.ResourceConfig;
+import org.junit.Test;
+
+import com.amazonaws.serverless.proxy.model.AwsProxyRequest;
+import com.amazonaws.serverless.proxy.model.AwsProxyResponse;
+
+/**
+ * Test that one can access the Jersey injection manager
+ */
+public class JerseyInjectionTest {
+
+    // Test ressource binder
+    private static class ResourceBinder extends AbstractBinder {
+
+        @Override
+        protected void configure() {
+            bind(new JerseyInjectionTest()).to(JerseyInjectionTest.class).in(Singleton.class);
+        }
+
+    }
+
+    private static ResourceConfig app = new ResourceConfig().register(MultiPartFeature.class)
+                                                            .register(new ResourceBinder());
+
+    private static JerseyLambdaContainerHandler<AwsProxyRequest, AwsProxyResponse> handler = JerseyLambdaContainerHandler.getAwsProxyHandler(
+            app);
+
+    @Test
+    public void can_get_injected_resources() throws Exception {
+
+        JerseyInjectionTest instance1 = handler.getInjectionManager().getInstance(JerseyInjectionTest.class);
+        assertNotNull(instance1);
+
+        JerseyInjectionTest instance2 = handler.getInjectionManager().getInstance(JerseyInjectionTest.class);
+        assertEquals(instance1, instance2);
+
+    }
+}