General cleanup

- Deprecated BindableAdapter in favor of providing default operations in Bindable
- Removed 'postProcessBeforeInitialization(..)' from 'BinderAwareRouterBeanPostProcessor' as it is no longer required

spring-cloud-stream/src/main/java/org/springframework/cloud/stream/binding/Bindable.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 the original author or authors.
+ * Copyright 2015-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@
 
 package org.springframework.cloud.stream.binding;
 
+import java.util.Collections;
 import java.util.Set;
 
 /**
@@ -24,37 +25,42 @@ import java.util.Set;
  * Intended for internal use.
  *
  * @author Marius Bogoevici
+ * @author Oleg Zhurakousky
  */
 public interface Bindable {
 
 	/**
 	 * Binds all the inputs associated with this instance.
 	 */
-	void bindInputs(BindingService adapter);
+	default void bindInputs(BindingService adapter) {}
 
 	/**
 	 * Binds all the outputs associated with this instance.
 	 */
-	void bindOutputs(BindingService adapter);
+	default void bindOutputs(BindingService adapter) {}
 
 	/**
 	 * Unbinds all the inputs associated with this instance.
 	 */
-	void unbindInputs(BindingService adapter);
+	default void unbindInputs(BindingService adapter) {}
 
 	/**
 	 * Unbinds all the outputs associated with this instance.
 	 */
-	void unbindOutputs(BindingService adapter);
+	default void unbindOutputs(BindingService adapter) {}
 
 	/**
 	 * Enumerates all the input binding names.
 	 */
-	Set<String> getInputs();
+	default Set<String> getInputs() {
+		return Collections.emptySet();
+	}
 
 	/**
 	 * Enumerates all the output binding names.
 	 */
-	Set<String> getOutputs();
+	default Set<String> getOutputs() {
+		return Collections.emptySet();
+	}
 
 }

spring-cloud-stream/src/main/java/org/springframework/cloud/stream/binding/BindableAdapter.java

@@ -23,7 +23,10 @@ import java.util.Set;
  * Default adapter implementation for {@Bindable}.
  *
  * @author Ilayaperumal Gopinathan
+ *
+ * @deprecated as of version 2.0. Use {@link Bindable} interface instead.
  */
+@Deprecated
 public class BindableAdapter implements Bindable {
 
 	@Override

spring-cloud-stream/src/main/java/org/springframework/cloud/stream/binding/BinderAwareRouterBeanPostProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2015 the original author or authors.
+ * Copyright 2013-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,11 +37,6 @@ public class BinderAwareRouterBeanPostProcessor implements BeanPostProcessor {
 		this.channelResolver = channelResolver;
 	}
 
-	@Override
-	public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
-		return bean;
-	}
-
 	@Override
 	public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
 		if (bean instanceof AbstractMappingMessageRouter) {

spring-cloud-stream/src/main/java/org/springframework/cloud/stream/binding/DynamicDestinationsBindable.java

@@ -31,12 +31,12 @@ import org.springframework.cloud.stream.binder.Binding;
  *
  * @author Ilayaperumal Gopinathan
  */
-public final class DynamicDestinationsBindable extends BindableAdapter {
+public final class DynamicDestinationsBindable implements Bindable {
 
 	/**
 	 * Map containing dynamic channel names and their bindings.
 	 */
-	private Map<String, Binding<?>> outputBindings = new HashMap<>();
+	private final Map<String, Binding<?>> outputBindings = new HashMap<>();
 
 	public void addOutputBinding(String name, Binding<?> binding) {
 		this.outputBindings.put(name, binding);