X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Fwordcount%2Fsplitter%2FSplitterApplication.java;h=cfe7a4ade185239abc74c6f3d1c9efbfbdc08a29;hb=bc490d203bb6fbe99c397310d0aa1d3081390f03;hp=7087ed1bbed2cb835868c7fc90116455004d7dd5;hpb=8d0ef2423c0f6ef6a439b98a1d9b1b1a64d89d45;p=demos%2Fkafka%2Fwordcount

diff --git a/src/main/java/de/juplo/kafka/wordcount/splitter/SplitterApplication.java b/src/main/java/de/juplo/kafka/wordcount/splitter/SplitterApplication.java
index 7087ed1..cfe7a4a 100644
--- a/src/main/java/de/juplo/kafka/wordcount/splitter/SplitterApplication.java
+++ b/src/main/java/de/juplo/kafka/wordcount/splitter/SplitterApplication.java
@@ -10,8 +10,12 @@ import org.springframework.expression.common.LiteralExpression;
 import org.springframework.expression.spel.standard.SpelExpressionParser;
 import org.springframework.integration.annotation.ServiceActivator;
 import org.springframework.integration.annotation.Transformer;
+import org.springframework.integration.channel.DirectChannel;
+import org.springframework.integration.channel.interceptor.WireTap;
 import org.springframework.integration.config.EnableIntegration;
+import org.springframework.integration.config.GlobalChannelInterceptor;
 import org.springframework.integration.core.MessageProducer;
+import org.springframework.integration.handler.LoggingHandler;
 import org.springframework.integration.kafka.inbound.KafkaMessageDrivenChannelAdapter;
 import org.springframework.integration.kafka.outbound.KafkaProducerMessageHandler;
 import org.springframework.integration.transformer.HeaderEnricher;
@@ -24,9 +28,15 @@ import org.springframework.kafka.listener.KafkaMessageListenerContainer;
 import org.springframework.integration.kafka.channel.SubscribableKafkaChannel;
 import org.springframework.kafka.config.KafkaListenerContainerFactory;
 import org.springframework.kafka.listener.AbstractMessageListenerContainer;
+import org.springframework.messaging.Message;
+import org.springframework.messaging.MessageChannel;
 import org.springframework.messaging.MessageHandler;
+import org.springframework.messaging.support.ChannelInterceptor;
+import org.springframework.messaging.support.MessageBuilder;
 
+import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 
@@ -73,11 +83,15 @@ public class SplitterApplication
 	@Bean
 	SubscribableKafkaChannel recordings(
 			KafkaTemplate<String, String> kafkaTemplate,
-			KafkaListenerContainerFactory<AbstractMessageListenerContainer<String, String>> containerFactory)
+			KafkaListenerContainerFactory<AbstractMessageListenerContainer<String, String>> containerFactory,
+			ChannelInterceptor messageKeyInterceptor)
 	{
 		SubscribableKafkaChannel channel =
 				new SubscribableKafkaChannel(kafkaTemplate, containerFactory, "channel-recordings");
 		channel.setGroupId("recordings");
+		List<ChannelInterceptor> interceptors = new ArrayList<>(1);
+		interceptors.add(messageKeyInterceptor);
+		channel.setInterceptors(interceptors);
 		return channel;
 	}
 
@@ -99,14 +113,58 @@ public class SplitterApplication
 	@Bean
 	SubscribableKafkaChannel words(
 			KafkaTemplate<String, String> kafkaTemplate,
-			KafkaListenerContainerFactory<AbstractMessageListenerContainer<String, String>> containerFactory)
+			KafkaListenerContainerFactory<AbstractMessageListenerContainer<String, String>> containerFactory,
+			ChannelInterceptor messageKeyInterceptor)
 	{
 		SubscribableKafkaChannel channel =
 				new SubscribableKafkaChannel(kafkaTemplate, containerFactory, "channel-words");
 		channel.setGroupId("words");
+		List<ChannelInterceptor> interceptors = new ArrayList<>(1);
+		interceptors.add(messageKeyInterceptor);
+		channel.setInterceptors(interceptors);
 		return channel;
 	}
 
+	@Bean
+	MessageChannel messageLog()
+	{
+		return new DirectChannel();
+	}
+
+	@Bean
+	ChannelInterceptor messageKeyInterceptor()
+	{
+		return new ChannelInterceptor() {
+			@Override
+			public Message<?> preSend(Message<?> message, MessageChannel channel)
+			{
+				String key = message.getHeaders().get("key", String.class);
+				return MessageBuilder
+						.fromMessage(message)
+						.setHeader("kafka_messageKey", key)
+						.build();
+			}
+		};
+	}
+
+	@GlobalChannelInterceptor
+	@Bean
+	ChannelInterceptor globalLoggingWireTap(MessageChannel messageLog)
+	{
+		return new WireTap(messageLog);
+	}
+
+	@Bean
+	@ServiceActivator(inputChannel = "messageLog")
+	public LoggingHandler logging()
+	{
+		LoggingHandler adapter = new LoggingHandler(LoggingHandler.Level.DEBUG);
+		adapter.setLoggerName("MESSAGE_LOG");
+		adapter.setLogExpressionString("headers.id + ': ' + payload + ', headers=' + headers");
+		return adapter;
+	}
+
+
 	public static void main(String[] args)
 	{
 		SpringApplication.run(SplitterApplication.class, args);