Added method to SpringBoot container handler to address #88.

Author: sapessi

aws-serverless-java-container-spring/src/main/java/com/amazonaws/serverless/proxy/spring/SpringBootLambdaContainerHandler.java

@@ -113,6 +113,7 @@ protected void handleRequest(AwsProxyHttpServletRequest containerRequest, AwsHtt
 
         // wire up the application context on the first invocation
         if (!initialized) {
+            System.setProperty("spring.profiles.active", String.join(",", springProfiles));
             SpringServletContainerInitializer springServletContainerInitializer = new SpringServletContainerInitializer();
             LinkedHashSet<Class<?>> webAppInitializers = new LinkedHashSet<>();
             webAppInitializers.add(springBootInitializer);

samples/springboot/pet-store/src/main/java/com/amazonaws/serverless/sample/springboot/Application.java

@@ -4,7 +4,17 @@
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.web.support.SpringBootServletInitializer;
+import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
+import org.springframework.web.servlet.HandlerAdapter;
+import org.springframework.web.servlet.HandlerExceptionResolver;
+import org.springframework.web.servlet.HandlerMapping;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter;
+import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
 
 
 @SpringBootApplication
@@ -15,6 +25,40 @@ public class Application extends SpringBootServletInitializer {
     @Value("${logging.level.root:OFF}")
     String message = "";
 
+    /*
+     * Create required HandlerMapping, to avoid several default HandlerMapping instances being created
+     */
+    @Bean
+    public HandlerMapping handlerMapping() {
+        return new RequestMappingHandlerMapping();
+    }
+
+    /*
+     * Create required HandlerAdapter, to avoid several default HandlerAdapter instances being created
+     */
+    @Bean
+    public HandlerAdapter handlerAdapter() {
+        return new RequestMappingHandlerAdapter();
+    }
+
+    /*
+     * optimization - avoids creating default exception resolvers; not required as the serverless container handles
+     * all exceptions
+     *
+     * By default, an ExceptionHandlerExceptionResolver is created which creates many dependent object, including
+     * an expensive ObjectMapper instance.
+     */
+    @Bean
+    public HandlerExceptionResolver handlerExceptionResolver() {
+        return new HandlerExceptionResolver() {
+
+            @Override
+            public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
+                return null;
+            }
+        };
+    }
+
     public static void main(String[] args) {
         SpringApplication.run(Application.class, args);
     }