Stop the POJA application if input stream is closed

http-poja-apache/src/main/java/io/micronaut/http/poja/apache/ApacheServletHttpRequest.java

@@ -31,6 +31,7 @@
 import io.micronaut.http.cookie.Cookies;
 import io.micronaut.http.poja.PojaHttpRequest;
 import io.micronaut.http.poja.apache.exception.ApacheServletBadRequestException;
+import io.micronaut.http.poja.exception.NoPojaRequestException;
 import io.micronaut.http.poja.util.MultiValueHeaders;
 import io.micronaut.http.poja.util.MultiValuesQueryParameters;
 import io.micronaut.http.simple.cookies.SimpleCookies;
@@ -110,6 +111,9 @@ public ApacheServletHttpRequest(
         } catch (HttpException | IOException e) {
             throw new ApacheServletBadRequestException("HTTP request could not be parsed", e);
         }
+        if (request == null) {
+            throw new NoPojaRequestException();
+        }
 
         method = HttpMethod.parse(request.getMethod());
         try {

http-poja-common/src/main/java/io/micronaut/http/poja/PojaHttpServerlessApplication.java

@@ -17,6 +17,7 @@
 
 import io.micronaut.context.ApplicationContext;
 import io.micronaut.core.annotation.NonNull;
+import io.micronaut.http.poja.exception.NoPojaRequestException;
 import io.micronaut.runtime.ApplicationConfiguration;
 import io.micronaut.runtime.EmbeddedApplication;
 import io.micronaut.servlet.http.ServletExchange;
@@ -90,6 +91,9 @@ protected ServletExchange<REQ, RES> createExchange(Object request, Object respon
             runIndefinitely(servletHttpHandler, input, output);
         } catch (IOException e) {
             throw new RuntimeException(e);
+        } catch (NoPojaRequestException e) {
+            this.stop();
+            Thread.currentThread().interrupt();
         }
         return this;
     }

http-poja-common/src/main/java/io/micronaut/http/poja/exception/NoPojaRequestException.java

@@ -0,0 +1,17 @@
+package io.micronaut.http.poja.exception;
+
+/**
+ * An exception to be thrown when no additional requests can be parsed.
+ * This can happen if the input stream is closed when waiting for a new request.
+ * This is not an error condition, therefore application can simply stop.
+ */
+public class NoPojaRequestException extends RuntimeException {
+
+    /**
+     * Constructor for the exception.
+     */
+    public NoPojaRequestException() {
+        super("No new request was found in the input stream");
+    }
+
+}

test-sample-poja/README.md

@@ -37,3 +37,8 @@ Hello, Micronaut Without Netty!
 
 ```
 
+Alternatively redirect the input from a file:
+```shell
+gradle :micronaut-test-sample-poja:run --console=plain <test-sample-poja/test-request.txt
+```
+

test-sample-poja/build.gradle

@@ -46,6 +46,7 @@ graalvmNative {
     binaries.all {
         buildArgs.add("--gc=serial")
         buildArgs.add("--install-exit-handlers")
+        buildArgs.add("-Ob")
     }
 }
 

test-sample-poja/src/main/java/io/micronaut/http/poja/sample/Application.java

@@ -15,6 +15,7 @@
  */
 package io.micronaut.http.poja.sample;
 
+import io.micronaut.context.ApplicationContext;
 import io.micronaut.runtime.Micronaut;
 
 /**
@@ -26,7 +27,8 @@
 public class Application {
 
     public static void main(String[] args) {
-        Micronaut.run(Application.class, args);
+        ApplicationContext context = Micronaut.run(Application.class, args);
+        context.stop();
     }
 
 }

test-sample-poja/test-request.txt

@@ -0,0 +1,3 @@
+GET / HTTP/1.1
+Content-Length: 0
+