Финальная версия примеров на занятие 26 (SI: Endpoints и Flow Components) для группы 2019-08

2019-08/spring-26/src/main/java/ru/otus/spring/integration/App.java

@@ -7,12 +7,14 @@ import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.support.AbstractApplicationContext;
 import org.springframework.integration.annotation.IntegrationComponentScan;
-import org.springframework.integration.channel.DirectChannel;
 import org.springframework.integration.channel.PublishSubscribeChannel;
+import org.springframework.integration.channel.QueueChannel;
 import org.springframework.integration.config.EnableIntegration;
 import org.springframework.integration.dsl.IntegrationFlow;
 import org.springframework.integration.dsl.IntegrationFlows;
+import org.springframework.integration.dsl.Pollers;
 import org.springframework.integration.dsl.channel.MessageChannels;
+import org.springframework.integration.scheduling.PollerMetadata;
 import ru.otus.spring.integration.domain.Food;
 import ru.otus.spring.integration.domain.OrderItem;
 
@@ -29,25 +31,29 @@ import java.util.stream.Collectors;
 public class App {
     private static final String[] MENU = { "coffee", "tea", "smoothie", "whiskey", "beer", "cola", "water" };
 
+
     @Bean
-    public DirectChannel itemsChannel() {
-        return MessageChannels.direct().datatype( OrderItem.class ).get();
+    public QueueChannel itemsChannel() {
+        return MessageChannels.queue( 10 ).get();
     }
 
     @Bean
     public PublishSubscribeChannel foodChannel() {
-        return MessageChannels.publishSubscribe().datatype( Food.class ).get();
+        return MessageChannels.publishSubscribe().get();
     }
 
-    // TODO: create default poller
+    @Bean(name = PollerMetadata.DEFAULT_POLLER)
+    public PollerMetadata poller() {
+        return Pollers.fixedRate( 100 ).maxMessagesPerPoll( 2 ).get();
+    }
 
     @Bean
     public IntegrationFlow cafeFlow() {
         return IntegrationFlows.from( "itemsChannel" )
-                // TODO: cook OrderItem in the kitchen
-                // TODO*: add router and subflows to process iced and usual items
-                // TODO*: add splitter and aggregator
-                // TODO: forward it to the publish subscriber channel
+                .split()
+                .handle( "kitchenService", "cook" )
+                .aggregate()
+                .channel( "foodChannel" )
                 .get();
     }
 
@@ -60,14 +66,25 @@ public class App {
         while ( true ) {
             Thread.sleep( 1000 );
 
-            OrderItem items = generateOrderItem();
+            Collection<OrderItem> items = generateOrderItems();
             System.out.println( "New orderItems: " +
-                    items.getItemName() );
-            Food food = cafe.process( items );
-            System.out.println( "Ready food: " + food.getName() );
+                    items.stream().map( OrderItem::getItemName )
+                            .collect( Collectors.joining( "," ) ) );
+            Collection<Food> food = cafe.process( items );
+            System.out.println( "Ready food: " + food.stream()
+                    .map( Food::getName )
+                    .collect( Collectors.joining( "," ) ) );
         }
     }
 
+    private static Collection<OrderItem> generateOrderItems() {
+        List<OrderItem> items = new ArrayList<>();
+        for ( int i = 0; i < RandomUtils.nextInt( 1, 5 ); ++ i ) {
+            items.add( generateOrderItem() );
+        }
+        return items;
+    }
+
     private static OrderItem generateOrderItem() {
         return new OrderItem( MENU[ RandomUtils.nextInt( 0, MENU.length ) ] );
     }

2019-08/spring-26/src/main/java/ru/otus/spring/integration/Cafe.java

@@ -1,13 +1,18 @@
 package ru.otus.spring.integration;
 
+
+import org.springframework.integration.annotation.Gateway;
+import org.springframework.integration.annotation.MessagingGateway;
 import ru.otus.spring.integration.domain.Food;
 import ru.otus.spring.integration.domain.OrderItem;
 
 import java.util.Collection;
 
 // TODO: add messaging gateway annotation
+@MessagingGateway
 public interface Cafe {
 
     // TODO: add gateway annotation with required channels
-    Food process( OrderItem orderItem);
+    @Gateway(requestChannel = "itemsChannel", replyChannel = "foodChannel")
+    Collection<Food> process( Collection<OrderItem> orderItem);
 }