Polished adapter initializers consolidation effort

- Added ability to retrieve input type from FunctionRegistration (if available) in AbstractSpringFunctionAdapterInitializer
- Removed azure/AzureSpringFunctionInitializer and aws/SpringFunctionInitializer
- Added additional tests in AWS and Azure modules
- See 0189c578ef for additional info

spring-cloud-function-adapters/spring-cloud-function-adapter-aws/src/test/java/org/springframework/cloud/function/adapter/aws/SpringBootApiGatewayRequestHandlerTests.java

@@ -34,6 +34,9 @@ import org.springframework.messaging.support.GenericMessage;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
+/**
+ *
+ */
 public class SpringBootApiGatewayRequestHandlerTests {
 
 	private SpringBootApiGatewayRequestHandler handler;
@@ -41,8 +44,6 @@ public class SpringBootApiGatewayRequestHandlerTests {
 	@Test
 	public void functionBean() {
 		this.handler = new SpringBootApiGatewayRequestHandler(FunctionConfig.class);
-		this.handler.initialize();
-
 		APIGatewayProxyRequestEvent request = new APIGatewayProxyRequestEvent();
 		request.setBody("{\"value\":\"foo\"}");
 
@@ -58,8 +59,6 @@ public class SpringBootApiGatewayRequestHandlerTests {
 	public void functionMessageBean() {
 		this.handler = new SpringBootApiGatewayRequestHandler(
 				FunctionMessageConfig.class);
-		this.handler.initialize();
-
 		APIGatewayProxyRequestEvent request = new APIGatewayProxyRequestEvent();
 		request.setBody("{\"value\":\"foo\"}");
 

spring-cloud-function-adapters/spring-cloud-function-adapter-aws/src/test/java/org/springframework/cloud/function/adapter/aws/SpringBootKinesisEventHandlerTests.java

@@ -111,7 +111,6 @@ public class SpringBootKinesisEventHandlerTests {
 	@Test
 	public void functionBeanHandlesKinesisEvent() throws Exception {
 		this.handler = new SpringBootKinesisEventHandler<>(FunctionConfig.class);
-		this.handler.initialize();
 
 		KinesisEvent event = asKinesisEvent(singletonList(new Foo("foo")));
 
@@ -123,7 +122,6 @@ public class SpringBootKinesisEventHandlerTests {
 	@Test
 	public void functionBeanHandlesAggregatedKinesisEvent() throws Exception {
 		this.handler = new SpringBootKinesisEventHandler<>(FunctionConfig.class);
-		this.handler.initialize();
 
 		List<Foo> events = asList(new Foo("foo"), new Foo("bar"), new Foo("baz"));
 		KinesisEvent aggregatedEvent = asAggregatedKinesisEvent(events);
@@ -137,7 +135,6 @@ public class SpringBootKinesisEventHandlerTests {
 	@Test
 	public void functionMessageBean() throws Exception {
 		this.handler = new SpringBootKinesisEventHandler<>(FunctionMessageConfig.class);
-		this.handler.initialize();
 
 		KinesisEvent event = asKinesisEvent(asList(new Foo("foo"), new Foo("bar")));
 

spring-cloud-function-adapters/spring-cloud-function-adapter-aws/src/test/java/org/springframework/cloud/function/adapter/aws/SpringBootRequestHandlerTests.java

@@ -39,7 +39,6 @@ public class SpringBootRequestHandlerTests {
 	@Test
 	public void functionBean() throws Exception {
 		this.handler = new SpringBootRequestHandler<Foo, Bar>(FunctionConfig.class);
-		this.handler.initialize();
 		Object output = this.handler.handleRequest(new Foo("foo"), null);
 		assertThat(output).isInstanceOf(Bar.class);
 	}

spring-cloud-function-adapters/spring-cloud-function-adapter-aws/src/test/java/org/springframework/cloud/function/adapter/aws/SpringBootStreamHandlerTests.java

@@ -21,6 +21,7 @@ import java.io.ByteArrayOutputStream;
 import java.util.function.Function;
 
 import org.junit.Test;
+import reactor.core.publisher.Flux;
 
 import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
 import org.springframework.cloud.function.context.config.ContextFunctionCatalogAutoConfiguration;
@@ -58,6 +59,46 @@ public class SpringBootStreamHandlerTests {
 		assertThat(output.toString()).isEqualTo("{\"value\":\"FOO\"}");
 	}
 
+	@Test
+	public void functionNonFluxBeanNoCatalog() throws Exception {
+		this.handler = new SpringBootStreamHandler(NoCatalogNonFluxFunctionConfig.class);
+		this.handler.initialize(null);
+		ByteArrayOutputStream output = new ByteArrayOutputStream();
+		this.handler.handleRequest(
+				new ByteArrayInputStream("{\"value\":\"foo\"}".getBytes()), output, null);
+		assertThat(output.toString()).isEqualTo("{\"value\":\"FOO\"}");
+	}
+
+	@Test
+	public void functionFluxBeanNoCatalog() throws Exception {
+		this.handler = new SpringBootStreamHandler(NoCatalogFluxFunctionConfig.class);
+		this.handler.initialize(null);
+		ByteArrayOutputStream output = new ByteArrayOutputStream();
+		this.handler.handleRequest(
+				new ByteArrayInputStream("{\"value\":\"foo\"}".getBytes()), output, null);
+		assertThat(output.toString()).isEqualTo("{\"value\":\"FOO\"}");
+	}
+
+	@Configuration
+	protected static class NoCatalogNonFluxFunctionConfig {
+
+		@Bean
+		public Function<Foo, Bar> function() {
+			return foo -> new Bar(foo.getValue().toUpperCase());
+		}
+
+	}
+
+	@Configuration
+	protected static class NoCatalogFluxFunctionConfig {
+
+		@Bean
+		public Function<Flux<Foo>, Flux<Bar>> function() {
+			return flux -> flux.map(foo -> new Bar(foo.getValue().toUpperCase()));
+		}
+
+	}
+
 	@Configuration
 	@Import({ ContextFunctionCatalogAutoConfiguration.class,
 			JacksonAutoConfiguration.class })