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-samples/double/src/main/java/config/sink/SinkApplication.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2015 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package config.sink;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * @author Marius Bogoevici
+ */
+@SpringBootApplication
+public class SinkApplication {
+}

spring-cloud-stream-samples/double/src/main/java/config/sink/SinkModuleDefinition.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package config;
+package config.sink;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

spring-cloud-stream-samples/double/src/main/java/config/source/SourceApplication.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2015 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package config.source;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * @author Marius Bogoevici
+ */
+@SpringBootApplication
+public class SourceApplication {
+}

spring-cloud-stream-samples/double/src/main/java/config/source/SourceModuleDefinition.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package config;
+package config.source;
 
 import java.text.SimpleDateFormat;
 import java.util.Date;
@@ -35,11 +35,10 @@ import org.springframework.messaging.support.GenericMessage;
 @EnableModule(Source.class)
 public class SourceModuleDefinition {
 
-	@Value("${format:YYYY/MM/dd hh:mm:ss}")
-	private String format;
+	private String format = "yyyy-MM-dd HH:mm:ss";
 
 	@Bean
-	@InboundChannelAdapter(value = Source.OUTPUT, autoStartup = "false", poller = @Poller(fixedDelay = "${fixedDelay}", maxMessagesPerPoll = "1"))
+	@InboundChannelAdapter(value = Source.OUTPUT, poller = @Poller(fixedDelay = "${fixedDelay}", maxMessagesPerPoll = "1"))
 	public MessageSource<String> timerMessageSource() {
 		return () -> new GenericMessage<>(new SimpleDateFormat(this.format).format(new Date()));
 	}

spring-cloud-stream-samples/double/src/main/java/demo/DoubleApplication.java

@@ -16,25 +16,17 @@
 
 package demo;
 
-import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.cloud.stream.aggregate.AggregateBuilder;
-import org.springframework.cloud.stream.aggregate.AggregateConfigurer;
+import org.springframework.cloud.stream.aggregate.AggregateApplication;
 
-import config.SinkModuleDefinition;
-import config.SourceModuleDefinition;
+import config.sink.SinkApplication;
+import config.source.SourceApplication;
 
 @SpringBootApplication
-public class DoubleApplication implements AggregateConfigurer {
-
-	@Override
-	public void configure(AggregateBuilder builder) {
-		builder.from(SourceModuleDefinition.class).as("source")
-				.to(SinkModuleDefinition.class).as("sink");
-	}
+public class DoubleApplication {
 
 	public static void main(String[] args) {
-		SpringApplication.run(DoubleApplication.class, args);
+		AggregateApplication.run(SourceApplication.class, SinkApplication.class);
 	}
 
 }

spring-cloud-stream-samples/double/src/main/resources/application.yml

@@ -1 +1 @@
-  
+fixedDelay: 1000