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;
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;
@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;
}
@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);