Updates to docs

spring-statemachine-samples/src/main/java/demo/CommonConfiguration.java

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+package demo;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Scanner;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.context.ApplicationListener;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.core.task.SyncTaskExecutor;
+import org.springframework.core.task.TaskExecutor;
+import org.springframework.statemachine.event.OnStateChangedEvent;
+import org.springframework.statemachine.event.OnTransitionEvent;
+import org.springframework.statemachine.event.StateMachineEvent;
+import org.springframework.statemachine.event.StateMachineEventPublisherConfiguration;
+
+@Configuration
+public class CommonConfiguration {
+
+	private final static Log log = LogFactory.getLog(CommonConfiguration.class);
+
+	@Configuration
+	@Import(StateMachineEventPublisherConfiguration.class)
+	static class ApplicationConfig {
+
+		@Bean
+		public TaskExecutor taskExecutor() {
+			return new SyncTaskExecutor();
+		}
+
+		@Bean
+		public TestEventListener testEventListener() {
+			return new TestEventListener();
+		}
+
+		@Bean
+		public String stateChartModel() throws IOException {
+			ClassPathResource model = new ClassPathResource("statechartmodel.txt");
+			InputStream inputStream = model.getInputStream();
+			Scanner scanner = new Scanner(inputStream);
+			String content = scanner.useDelimiter("\\Z").next();
+			scanner.close();
+			return content;
+		}
+
+	}
+
+	static class TestEventListener implements ApplicationListener<StateMachineEvent> {
+
+		@Override
+		public void onApplicationEvent(StateMachineEvent event) {
+			if (event instanceof OnStateChangedEvent) {
+				OnStateChangedEvent e = (OnStateChangedEvent)event;
+				log.info("State changed to " + e.getTargetState().getId());
+			} else if (event instanceof OnTransitionEvent) {
+				OnTransitionEvent e = (OnTransitionEvent)event;
+				log.info("Transition " + e.getTransition().toString());
+			}
+		}
+
+	}
+
+}