Add support for direct binding

and refactor channel proxy behaviour

- Remove DirectChannelProxyFactory;
- Proxies create channels as necessary, including support for PollableChannels;
- Channel beans are using the bean factory methods for the proxies;
- Coordinate bind/unbind across a context through the internal Bindable interface;
- Add support for embedding modules as independent child contexts of the main module, wrapped in a Bindable interface;
- Add support for channel name namespacing;
- Use a shared channel registry (consulted by the proxies) to create direct bindings;

Restrict the use of SharedChannelRegistry to aggregation

Fixed copyrights

Polishing based on comments from the previous branch

Tweaks

- namespacing takes into account module index, so multiple modules with the same class can partiticipate
- fix how properties are passes to parent/child
- Split ChannelBindingLifecycle from ChannelBindingAdapter and register it with each child;

Javadoc updates

Pass only  prefixed properties

Actually use the filtering method

Lifecycle simplifications

- Removing BindableChannelWrapper and UnbindOnCloseApplicationListener and relying on ChannelBindingListener solely;
- Some code cleanup

Further simplifications

More cleanup

Remove BindableUtils, rename ChannelBindingAdapter

Minor improvements

Addressing some comments, renaming, etc

More polishing

spring-cloud-stream-binders/spring-cloud-stream-binder-local/src/main/java/org/springframework/cloud/stream/binder/local/config/LocalExecutorConfigurationProperties.java

@@ -24,43 +24,43 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
 @ConfigurationProperties(prefix = "spring.cloud.stream.binder.local.executor")
 class LocalExecutorConfigurationProperties {
 	
-	private int executorCorePoolSize;
+	private int corePoolSize;
 	
-	private int executorMaxPoolSize;
+	private int maxPoolSize;
 	
-	private int executorQueueSize = Integer.MAX_VALUE;
+	private int queueSize = Integer.MAX_VALUE;
 	
-	private int executorKeepAliveSeconds;
+	private int keepAliveSeconds;
 
-	public int getExecutorCorePoolSize() {
-		return executorCorePoolSize;
+	public int getCorePoolSize() {
+		return corePoolSize;
 	}
 
-	public void setExecutorCorePoolSize(int executorCorePoolSize) {
-		this.executorCorePoolSize = executorCorePoolSize;
+	public void setCorePoolSize(int corePoolSize) {
+		this.corePoolSize = corePoolSize;
 	}
 
-	public int getExecutorMaxPoolSize() {
-		return executorMaxPoolSize;
+	public int getMaxPoolSize() {
+		return maxPoolSize;
 	}
 
-	public void setExecutorMaxPoolSize(int executorMaxPoolSize) {
-		this.executorMaxPoolSize = executorMaxPoolSize;
+	public void setMaxPoolSize(int maxPoolSize) {
+		this.maxPoolSize = maxPoolSize;
 	}
 
-	public int getExecutorQueueSize() {
-		return executorQueueSize;
+	public int getQueueSize() {
+		return queueSize;
 	}
 
-	public void setExecutorQueueSize(int executorQueueSize) {
-		this.executorQueueSize = executorQueueSize;
+	public void setQueueSize(int queueSize) {
+		this.queueSize = queueSize;
 	}
 
-	public int getExecutorKeepAliveSeconds() {
-		return executorKeepAliveSeconds;
+	public int getKeepAliveSeconds() {
+		return keepAliveSeconds;
 	}
 
-	public void setExecutorKeepAliveSeconds(int executorKeepAliveSeconds) {
-		this.executorKeepAliveSeconds = executorKeepAliveSeconds;
+	public void setKeepAliveSeconds(int keepAliveSeconds) {
+		this.keepAliveSeconds = keepAliveSeconds;
 	}
 }

spring-cloud-stream-binders/spring-cloud-stream-binder-local/src/main/java/org/springframework/cloud/stream/binder/local/config/LocalMessageChannelBinderConfiguration.java

@@ -44,10 +44,10 @@ public class LocalMessageChannelBinderConfiguration {
 	public LocalMessageChannelBinder localMessageChannelBinder() {
 		LocalMessageChannelBinder localMessageChannelBinder = new LocalMessageChannelBinder();
 		
-		localMessageChannelBinder.setExecutorCorePoolSize(localExecutorConfigurationProperties.getExecutorCorePoolSize());
-		localMessageChannelBinder.setExecutorKeepAliveSeconds(localExecutorConfigurationProperties.getExecutorKeepAliveSeconds());
-		localMessageChannelBinder.setExecutorMaxPoolSize(localExecutorConfigurationProperties.getExecutorMaxPoolSize());
-		localMessageChannelBinder.setExecutorQueueSize(localExecutorConfigurationProperties.getExecutorQueueSize());
+		localMessageChannelBinder.setExecutorCorePoolSize(localExecutorConfigurationProperties.getCorePoolSize());
+		localMessageChannelBinder.setExecutorKeepAliveSeconds(localExecutorConfigurationProperties.getKeepAliveSeconds());
+		localMessageChannelBinder.setExecutorMaxPoolSize(localExecutorConfigurationProperties.getMaxPoolSize());
+		localMessageChannelBinder.setExecutorQueueSize(localExecutorConfigurationProperties.getQueueSize());
 
 		if (polling > 0) {
 			PollerMetadata pollerMetadata = new PollerMetadata();