Refactoring samples

Restructuring the samples repository
Add more docker support
Add acceptance tests for the apps
Adding sensor average processor sample
Remove aggregate samples

processor-samples/reactive-processor/src/main/java/reactive/kafka/ReactiveProcessorApplication.java

@@ -0,0 +1,79 @@
+package reactive.kafka;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.stream.annotation.EnableBinding;
+import org.springframework.cloud.stream.annotation.Input;
+import org.springframework.cloud.stream.annotation.Output;
+import org.springframework.cloud.stream.annotation.StreamListener;
+import org.springframework.cloud.stream.messaging.Processor;
+import org.springframework.context.annotation.Bean;
+import org.springframework.integration.annotation.InboundChannelAdapter;
+import org.springframework.integration.annotation.Poller;
+import org.springframework.integration.core.MessageSource;
+import org.springframework.messaging.MessageChannel;
+import org.springframework.messaging.SubscribableChannel;
+import org.springframework.messaging.support.GenericMessage;
+import reactor.core.publisher.Flux;
+
+import java.time.Duration;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+@SpringBootApplication
+@EnableBinding(Processor.class)
+public class ReactiveProcessorApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(ReactiveProcessorApplication.class, args);
+	}
+
+	@StreamListener
+	@Output(Processor.OUTPUT)
+	public Flux<String> aggregate(@Input(Processor.INPUT) Flux<String> inbound) {
+		return inbound.
+				log()
+				.window(Duration.ofSeconds(5), Duration.ofSeconds(5))
+				.flatMap(w -> w.reduce("", (s1,s2)->s1+s2))
+				.log();
+	}
+
+	//Following source and sinks are used for testing only.
+	//Test source will send data to the same destination where the processor receives data
+	//Test sink will consume data from the same destination where the processor produces data
+
+	@EnableBinding(Source.class)
+	static class TestSource {
+
+		private AtomicBoolean semaphore = new AtomicBoolean(true);
+
+		@Bean
+		@InboundChannelAdapter(channel = "test-source", poller = @Poller(fixedDelay = "1000"))
+		public MessageSource<String> sendTestData() {
+			return () ->
+					new GenericMessage<>(this.semaphore.getAndSet(!this.semaphore.get()) ? "foo" : "bar");
+		}
+	}
+
+	@EnableBinding(Sink.class)
+	static class TestSink {
+
+		private final Log logger = LogFactory.getLog(getClass());
+
+		@StreamListener("test-sink")
+		public void receive(String payload) {
+			logger.info("Data received: " + payload);
+		}
+	}
+
+	public interface Sink {
+		@Input("test-sink")
+		SubscribableChannel sampleSink();
+	}
+
+	public interface Source {
+		@Output("test-source")
+		MessageChannel sampleSource();
+	}
+}

processor-samples/reactive-processor/src/main/resources/application.yml

@@ -0,0 +1,12 @@
+spring:
+  cloud:
+    stream:
+      bindings:
+        output:
+          destination: transformed
+        test-sink:
+          destination: transformed
+        input:
+          destination: testtock
+        test-source:
+          destination: testtock