GGH-431 Fixed discovery of a start class

- Ensured that FunctionClassUtils performs additional check to ensure that located star class is SpringBootApplication
- Added additional lookup to look for Main-Class if nothing was found in Start-Class primarily to support Azure
- Updated Azure samples
- Updated documentation

Resolves #431

spring-cloud-function-samples/function-sample-azure/pom.xml

@@ -25,10 +25,9 @@
 		<functionAppName>function-sample-azure</functionAppName>
 		<functionAppRegion>westus</functionAppRegion>
 		<functionResourceGroup>java-function-group</functionResourceGroup>
-		<stagingDirectory>${project.build.directory}/azure-functions/${functionAppName}
-		</stagingDirectory>
+		<stagingDirectory>${project.build.directory}/azure-functions/${functionAppName}</stagingDirectory>
 		<start-class>example.Config</start-class>
-		<wrapper.version>1.0.15.RELEASE</wrapper.version>
+		<wrapper.version>1.0.23.RELEASE</wrapper.version>
 	</properties>
 
 	<dependencies>
@@ -55,7 +54,7 @@
 			<dependency>
 				<groupId>org.springframework.cloud</groupId>
 				<artifactId>spring-cloud-function-dependencies</artifactId>
-				<version>2.2.0.BUILD-SNAPSHOT</version>
+				<version>3.0.1.BUILD-SNAPSHOT</version>
 				<type>pom</type>
 				<scope>import</scope>
 			</dependency>
@@ -92,7 +91,7 @@
 				<plugin>
 					<groupId>com.microsoft.azure</groupId>
 					<artifactId>azure-functions-maven-plugin</artifactId>
-					<version>1.0.0-beta-7</version>
+					<version>1.3.4</version>
 					<dependencies>
 						<dependency>
 							<groupId>javax.xml.bind</groupId>

spring-cloud-function-samples/function-sample-azure/src/main/azure/host.json

@@ -1,3 +1,4 @@
 {
-	"functionTimeout": "00:10:00"
+	"functionTimeout": "00:05:00",
+	"version": "2.0"
 }

spring-cloud-function-samples/function-sample-azure/src/main/java/example/Config.java

@@ -22,7 +22,6 @@ import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.annotation.Bean;
 
-// @checkstyle:off
 @SpringBootApplication
 public class Config {
 
@@ -36,7 +35,6 @@ public class Config {
 	}
 
 }
-// @checkstyle:on
 
 class Foo {
 

spring-cloud-function-samples/function-sample-azure/src/main/java/example/FooHandler.java

@@ -18,10 +18,13 @@ package example;
 
 import com.microsoft.azure.functions.ExecutionContext;
 import com.microsoft.azure.functions.HttpMethod;
+import com.microsoft.azure.functions.HttpRequestMessage;
 import com.microsoft.azure.functions.annotation.AuthorizationLevel;
 import com.microsoft.azure.functions.annotation.FunctionName;
 import com.microsoft.azure.functions.annotation.HttpTrigger;
 
+import java.util.Optional;
+
 import org.springframework.cloud.function.adapter.azure.AzureSpringBootRequestHandler;
 
 /**
@@ -30,11 +33,10 @@ import org.springframework.cloud.function.adapter.azure.AzureSpringBootRequestHa
 public class FooHandler extends AzureSpringBootRequestHandler<Foo, Bar> {
 
 	@FunctionName("uppercase")
-	public Bar execute(
-		@HttpTrigger(name = "req", methods = {HttpMethod.GET,
-			HttpMethod.POST}, authLevel = AuthorizationLevel.ANONYMOUS) Foo foo,
+	public Bar execute(@HttpTrigger(name = "req", methods = {HttpMethod.GET,
+			HttpMethod.POST}, authLevel = AuthorizationLevel.ANONYMOUS) HttpRequestMessage<Optional<Foo>> request,
 		ExecutionContext context) {
-		return handleRequest(foo, context);
+		return handleRequest(request.getBody().get(), context);
 	}
 
 }