Java 11 migrate remaining e (#1112)

* Moves eip-aggregator to Java 11

* Moves eip-message-channel to Java 11

* Moves eip-publish-subscribe to Java 11

* Moves eip-splitter to Java 11

* Moves eip-wire-tap to Java 11

* Moves event-aggregator to Java 11

* Moves event-asynchronous to Java 11

* Moves event-driven-architecture to Java 11

* Moves event-queue to Java 11

* Moves event-sourcing to Java 11

* Moves execute-around to Java 11

* Moves extension-objects to Java 11

eip-aggregator/src/main/java/com/iluwatar/eip/aggregator/App.java

@@ -27,7 +27,6 @@ import org.apache.camel.CamelContext;
 import org.apache.camel.builder.RouteBuilder;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.context.ConfigurableApplicationContext;
 
 /**
  * Sometimes in enterprise systems there is a need to group incoming data in order to process it as
@@ -49,19 +48,17 @@ public class App {
    */
   public static void main(String[] args) throws Exception {
     // Run Spring Boot application and obtain ApplicationContext
-    ConfigurableApplicationContext context = SpringApplication.run(App.class, args);
+    var context = SpringApplication.run(App.class, args);
 
     // Get CamelContext from ApplicationContext
-    CamelContext camelContext = (CamelContext) context.getBean("camelContext");
+    var camelContext = (CamelContext) context.getBean("camelContext");
 
     // Add a new routes that will handle endpoints form SplitterRoute class.
     camelContext.addRoutes(new RouteBuilder() {
-
       @Override
-      public void configure() throws Exception {
+      public void configure() {
         from("{{endpoint}}").log("ENDPOINT: ${body}");
       }
-
     });
 
     // Add producer that will send test message to an entry point in WireTapRoute

eip-aggregator/src/main/java/com/iluwatar/eip/aggregator/routes/AggregatorRoute.java

@@ -48,8 +48,6 @@ public class AggregatorRoute extends RouteBuilder {
 
   /**
    * Configures the route.
-   *
-   * @throws Exception in case of exception during configuration
    */
   @Override
   public void configure() {

eip-aggregator/src/main/java/com/iluwatar/eip/aggregator/routes/MessageAggregationStrategy.java

@@ -40,8 +40,8 @@ public class MessageAggregationStrategy implements AggregationStrategy {
       return newExchange;
     }
 
-    String in1 = (String) oldExchange.getIn().getBody();
-    String in2 = (String) newExchange.getIn().getBody();
+    var in1 = (String) oldExchange.getIn().getBody();
+    var in2 = (String) newExchange.getIn().getBody();
 
     oldExchange.getIn().setBody(in1 + ";" + in2);
 

eip-aggregator/src/test/java/com/iluwatar/eip/aggregator/AppTest.java

@@ -32,7 +32,6 @@ public class AppTest {
 
   @Test
   public void testMain() throws Exception {
-    String[] args = {};
-    App.main(args);
+    App.main(new String[]{});
   }
 }

eip-aggregator/src/test/java/com/iluwatar/eip/aggregator/routes/AggregatorRouteTest.java

@@ -23,6 +23,8 @@
 
 package com.iluwatar.eip.aggregator.routes;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
 import org.apache.camel.EndpointInject;
 import org.apache.camel.ProducerTemplate;
 import org.apache.camel.component.mock.MockEndpoint;
@@ -35,13 +37,11 @@ import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.ActiveProfiles;
 import org.springframework.test.context.junit.jupiter.SpringExtension;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
-
 /**
  * Test class for <i>AggregatorRoute</i>.
  * <p>
- * In order for it to work we have to mock endpoints we want to read/write to. To mock those we need to substitute
- * original endpoint names to mocks.
+ * In order for it to work we have to mock endpoints we want to read/write to. To mock those we need
+ * to substitute original endpoint names to mocks.
  * </p>
  */
 @ExtendWith(SpringExtension.class)
@@ -59,6 +59,7 @@ public class AggregatorRouteTest {
 
   /**
    * Test if endpoint receives three separate messages.
+   *
    * @throws Exception in case of en exception during the test
    */
   @Test
@@ -76,10 +77,10 @@ public class AggregatorRouteTest {
     endpoint.expectedMessageCount(2);
     endpoint.assertIsSatisfied();
 
-    String body = (String) endpoint.getReceivedExchanges().get(0).getIn().getBody();
+    var body = (String) endpoint.getReceivedExchanges().get(0).getIn().getBody();
     assertEquals(3, body.split(";").length);
 
-    String body2 = (String) endpoint.getReceivedExchanges().get(1).getIn().getBody();
+    var body2 = (String) endpoint.getReceivedExchanges().get(1).getIn().getBody();
     assertEquals(2, body2.split(";").length);
   }
 }

eip-aggregator/src/test/java/com/iluwatar/eip/aggregator/routes/MessageAggregationStrategyTest.java

@@ -23,13 +23,12 @@
 
 package com.iluwatar.eip.aggregator.routes;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
 import org.apache.camel.CamelContext;
-import org.apache.camel.Exchange;
 import org.apache.camel.impl.DefaultExchange;
 import org.junit.jupiter.api.Test;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
-
 /**
  * Tests MessageAggregationStrategy
  */
@@ -37,27 +36,27 @@ public class MessageAggregationStrategyTest {
 
   @Test
   public void testAggregate() {
-    MessageAggregationStrategy mas = new MessageAggregationStrategy();
-    Exchange oldExchange = new DefaultExchange((CamelContext) null);
+    var mas = new MessageAggregationStrategy();
+    var oldExchange = new DefaultExchange((CamelContext) null);
     oldExchange.getIn().setBody("TEST1");
 
-    Exchange newExchange = new DefaultExchange((CamelContext) null);
+    var newExchange = new DefaultExchange((CamelContext) null);
     newExchange.getIn().setBody("TEST2");
 
-    Exchange output = mas.aggregate(oldExchange, newExchange);
-    String outputBody = (String) output.getIn().getBody();
+    var output = mas.aggregate(oldExchange, newExchange);
+    var outputBody = (String) output.getIn().getBody();
     assertEquals("TEST1;TEST2", outputBody);
   }
 
   @Test
   public void testAggregateOldNull() {
-    MessageAggregationStrategy mas = new MessageAggregationStrategy();
+    var mas = new MessageAggregationStrategy();
 
-    Exchange newExchange = new DefaultExchange((CamelContext) null);
+    var newExchange = new DefaultExchange((CamelContext) null);
     newExchange.getIn().setBody("TEST2");
 
-    Exchange output = mas.aggregate(null, newExchange);
-    String outputBody = (String) output.getIn().getBody();
+    var output = mas.aggregate(null, newExchange);
+    var outputBody = (String) output.getIn().getBody();
 
     assertEquals(newExchange, output);
     assertEquals("TEST2", outputBody);